shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

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targets/cmsis/TARGET_STM/TARGET_NUCLEO_F302R8/stm32f30x_usart.c@323:9e901b0a5aa1, 2014-09-13 (annotated)

Committer:
shaoziyang
Date:
Sat Sep 13 14:25:46 2014 +0000
Revision:
323:9e901b0a5aa1
Parent:
125:23cc3068a9e4 
test with CLOCK_SETUP = 0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 125:23cc3068a9e4 1 /**
mbed_official 125:23cc3068a9e4 2 ******************************************************************************
mbed_official 125:23cc3068a9e4 3 * @file stm32f30x_usart.c
mbed_official 125:23cc3068a9e4 4 * @author MCD Application Team
mbed_official 125:23cc3068a9e4 5 * @version V1.1.0
mbed_official 125:23cc3068a9e4 6 * @date 27-February-2014
mbed_official 125:23cc3068a9e4 7 * @brief This file provides firmware functions to manage the following
mbed_official 125:23cc3068a9e4 8 * functionalities of the Universal synchronous asynchronous receiver
mbed_official 125:23cc3068a9e4 9 * transmitter (USART):
mbed_official 125:23cc3068a9e4 10 * + Initialization and Configuration
mbed_official 125:23cc3068a9e4 11 * + STOP Mode
mbed_official 125:23cc3068a9e4 12 * + AutoBaudRate
mbed_official 125:23cc3068a9e4 13 * + Data transfers
mbed_official 125:23cc3068a9e4 14 * + Multi-Processor Communication
mbed_official 125:23cc3068a9e4 15 * + LIN mode
mbed_official 125:23cc3068a9e4 16 * + Half-duplex mode
mbed_official 125:23cc3068a9e4 17 * + Smartcard mode
mbed_official 125:23cc3068a9e4 18 * + IrDA mode
mbed_official 125:23cc3068a9e4 19 * + RS485 mode
mbed_official 125:23cc3068a9e4 20 * + DMA transfers management
mbed_official 125:23cc3068a9e4 21 * + Interrupts and flags management
mbed_official 125:23cc3068a9e4 22 *
mbed_official 125:23cc3068a9e4 23 * @verbatim
mbed_official 125:23cc3068a9e4 24 ===============================================================================
mbed_official 125:23cc3068a9e4 25 ##### How to use this driver #####
mbed_official 125:23cc3068a9e4 26 ===============================================================================
mbed_official 125:23cc3068a9e4 27 [..]
mbed_official 125:23cc3068a9e4 28 (#) Enable peripheral clock using RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE)
mbed_official 125:23cc3068a9e4 29 function for USART1 or using RCC_APB1PeriphClockCmd(RCC_APB1Periph_USARTx, ENABLE)
mbed_official 125:23cc3068a9e4 30 function for USART2, USART3, UART4 and UART5.
mbed_official 125:23cc3068a9e4 31 (#) According to the USART mode, enable the GPIO clocks using
mbed_official 125:23cc3068a9e4 32 RCC_AHBPeriphClockCmd() function. (The I/O can be TX, RX, CTS,
mbed_official 125:23cc3068a9e4 33 or and SCLK).
mbed_official 125:23cc3068a9e4 34 (#) Peripheral's alternate function:
mbed_official 125:23cc3068a9e4 35 (++) Connect the pin to the desired peripherals' Alternate
mbed_official 125:23cc3068a9e4 36 Function (AF) using GPIO_PinAFConfig() function.
mbed_official 125:23cc3068a9e4 37 (++) Configure the desired pin in alternate function by:
mbed_official 125:23cc3068a9e4 38 GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AF.
mbed_official 125:23cc3068a9e4 39 (++) Select the type, pull-up/pull-down and output speed via
mbed_official 125:23cc3068a9e4 40 GPIO_PuPd, GPIO_OType and GPIO_Speed members.
mbed_official 125:23cc3068a9e4 41 (++) Call GPIO_Init() function.
mbed_official 125:23cc3068a9e4 42 (#) Program the Baud Rate, Word Length , Stop Bit, Parity, Hardware
mbed_official 125:23cc3068a9e4 43 flow control and Mode(Receiver/Transmitter) using the SPI_Init()
mbed_official 125:23cc3068a9e4 44 function.
mbed_official 125:23cc3068a9e4 45 (#) For synchronous mode, enable the clock and program the polarity,
mbed_official 125:23cc3068a9e4 46 phase and last bit using the USART_ClockInit() function.
mbed_official 125:23cc3068a9e4 47 (#) Enable the USART using the USART_Cmd() function.
mbed_official 125:23cc3068a9e4 48 (#) Enable the NVIC and the corresponding interrupt using the function
mbed_official 125:23cc3068a9e4 49 USART_ITConfig() if you need to use interrupt mode.
mbed_official 125:23cc3068a9e4 50 (#) When using the DMA mode:
mbed_official 125:23cc3068a9e4 51 (++) Configure the DMA using DMA_Init() function.
mbed_official 125:23cc3068a9e4 52 (++) Activate the needed channel Request using USART_DMACmd() function.
mbed_official 125:23cc3068a9e4 53 (#) Enable the DMA using the DMA_Cmd() function, when using DMA mode.
mbed_official 125:23cc3068a9e4 54 [..]
mbed_official 125:23cc3068a9e4 55 Refer to Multi-Processor, LIN, half-duplex, Smartcard, IrDA sub-sections
mbed_official 125:23cc3068a9e4 56 for more details.
mbed_official 125:23cc3068a9e4 57
mbed_official 125:23cc3068a9e4 58 @endverbatim
mbed_official 125:23cc3068a9e4 59
mbed_official 125:23cc3068a9e4 60 ******************************************************************************
mbed_official 125:23cc3068a9e4 61 * @attention
mbed_official 125:23cc3068a9e4 62 *
mbed_official 125:23cc3068a9e4 63 * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
mbed_official 125:23cc3068a9e4 64 *
mbed_official 125:23cc3068a9e4 65 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 125:23cc3068a9e4 66 * are permitted provided that the following conditions are met:
mbed_official 125:23cc3068a9e4 67 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 125:23cc3068a9e4 68 * this list of conditions and the following disclaimer.
mbed_official 125:23cc3068a9e4 69 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 125:23cc3068a9e4 70 * this list of conditions and the following disclaimer in the documentation
mbed_official 125:23cc3068a9e4 71 * and/or other materials provided with the distribution.
mbed_official 125:23cc3068a9e4 72 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 125:23cc3068a9e4 73 * may be used to endorse or promote products derived from this software
mbed_official 125:23cc3068a9e4 74 * without specific prior written permission.
mbed_official 125:23cc3068a9e4 75 *
mbed_official 125:23cc3068a9e4 76 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 125:23cc3068a9e4 77 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 125:23cc3068a9e4 78 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 125:23cc3068a9e4 79 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 125:23cc3068a9e4 80 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 125:23cc3068a9e4 81 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 125:23cc3068a9e4 82 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 125:23cc3068a9e4 83 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 125:23cc3068a9e4 84 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 125:23cc3068a9e4 85 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 125:23cc3068a9e4 86 *
mbed_official 125:23cc3068a9e4 87 ******************************************************************************
mbed_official 125:23cc3068a9e4 88 */
mbed_official 125:23cc3068a9e4 89
mbed_official 125:23cc3068a9e4 90 /* Includes ------------------------------------------------------------------*/
mbed_official 125:23cc3068a9e4 91 #include "stm32f30x_usart.h"
mbed_official 125:23cc3068a9e4 92 #include "stm32f30x_rcc.h"
mbed_official 125:23cc3068a9e4 93
mbed_official 125:23cc3068a9e4 94 /** @addtogroup STM32F30x_StdPeriph_Driver
mbed_official 125:23cc3068a9e4 95 * @{
mbed_official 125:23cc3068a9e4 96 */
mbed_official 125:23cc3068a9e4 97
mbed_official 125:23cc3068a9e4 98 /** @defgroup USART
mbed_official 125:23cc3068a9e4 99 * @brief USART driver modules
mbed_official 125:23cc3068a9e4 100 * @{
mbed_official 125:23cc3068a9e4 101 */
mbed_official 125:23cc3068a9e4 102
mbed_official 125:23cc3068a9e4 103 /* Private typedef -----------------------------------------------------------*/
mbed_official 125:23cc3068a9e4 104 /* Private define ------------------------------------------------------------*/
mbed_official 125:23cc3068a9e4 105
mbed_official 125:23cc3068a9e4 106 /*!< USART CR1 register clear Mask ((~(uint32_t)0xFFFFE6F3)) */
mbed_official 125:23cc3068a9e4 107 #define CR1_CLEAR_MASK ((uint32_t)(USART_CR1_M | USART_CR1_PCE | \
mbed_official 125:23cc3068a9e4 108 USART_CR1_PS | USART_CR1_TE | \
mbed_official 125:23cc3068a9e4 109 USART_CR1_RE))
mbed_official 125:23cc3068a9e4 110
mbed_official 125:23cc3068a9e4 111 /*!< USART CR2 register clock bits clear Mask ((~(uint32_t)0xFFFFF0FF)) */
mbed_official 125:23cc3068a9e4 112 #define CR2_CLOCK_CLEAR_MASK ((uint32_t)(USART_CR2_CLKEN | USART_CR2_CPOL | \
mbed_official 125:23cc3068a9e4 113 USART_CR2_CPHA | USART_CR2_LBCL))
mbed_official 125:23cc3068a9e4 114
mbed_official 125:23cc3068a9e4 115 /*!< USART CR3 register clear Mask ((~(uint32_t)0xFFFFFCFF)) */
mbed_official 125:23cc3068a9e4 116 #define CR3_CLEAR_MASK ((uint32_t)(USART_CR3_RTSE | USART_CR3_CTSE))
mbed_official 125:23cc3068a9e4 117
mbed_official 125:23cc3068a9e4 118 /*!< USART Interrupts mask */
mbed_official 125:23cc3068a9e4 119 #define IT_MASK ((uint32_t)0x000000FF)
mbed_official 125:23cc3068a9e4 120
mbed_official 125:23cc3068a9e4 121 /* Private macro -------------------------------------------------------------*/
mbed_official 125:23cc3068a9e4 122 /* Private variables ---------------------------------------------------------*/
mbed_official 125:23cc3068a9e4 123 /* Private function prototypes -----------------------------------------------*/
mbed_official 125:23cc3068a9e4 124 /* Private functions ---------------------------------------------------------*/
mbed_official 125:23cc3068a9e4 125
mbed_official 125:23cc3068a9e4 126 /** @defgroup USART_Private_Functions
mbed_official 125:23cc3068a9e4 127 * @{
mbed_official 125:23cc3068a9e4 128 */
mbed_official 125:23cc3068a9e4 129
mbed_official 125:23cc3068a9e4 130 /** @defgroup USART_Group1 Initialization and Configuration functions
mbed_official 125:23cc3068a9e4 131 * @brief Initialization and Configuration functions
mbed_official 125:23cc3068a9e4 132 *
mbed_official 125:23cc3068a9e4 133 @verbatim
mbed_official 125:23cc3068a9e4 134 ===============================================================================
mbed_official 125:23cc3068a9e4 135 ##### Initialization and Configuration functions #####
mbed_official 125:23cc3068a9e4 136 ===============================================================================
mbed_official 125:23cc3068a9e4 137 [..]
mbed_official 125:23cc3068a9e4 138 This subsection provides a set of functions allowing to initialize the USART
mbed_official 125:23cc3068a9e4 139 in asynchronous and in synchronous modes.
mbed_official 125:23cc3068a9e4 140 (+) For the asynchronous mode only these parameters can be configured:
mbed_official 125:23cc3068a9e4 141 (++) Baud Rate.
mbed_official 125:23cc3068a9e4 142 (++) Word Length.
mbed_official 125:23cc3068a9e4 143 (++) Stop Bit.
mbed_official 125:23cc3068a9e4 144 (++) Parity: If the parity is enabled, then the MSB bit of the data written
mbed_official 125:23cc3068a9e4 145 in the data register is transmitted but is changed by the parity bit.
mbed_official 125:23cc3068a9e4 146 Depending on the frame length defined by the M bit (8-bits or 9-bits),
mbed_official 125:23cc3068a9e4 147 the possible USART frame formats are as listed in the following table:
mbed_official 125:23cc3068a9e4 148 [..]
mbed_official 125:23cc3068a9e4 149 +-------------------------------------------------------------+
mbed_official 125:23cc3068a9e4 150 | M bit | PCE bit | USART frame |
mbed_official 125:23cc3068a9e4 151 |---------------------|---------------------------------------|
mbed_official 125:23cc3068a9e4 152 | 0 | 0 | | SB | 8 bit data | STB | |
mbed_official 125:23cc3068a9e4 153 |---------|-----------|---------------------------------------|
mbed_official 125:23cc3068a9e4 154 | 0 | 1 | | SB | 7 bit data | PB | STB | |
mbed_official 125:23cc3068a9e4 155 |---------|-----------|---------------------------------------|
mbed_official 125:23cc3068a9e4 156 | 1 | 0 | | SB | 9 bit data | STB | |
mbed_official 125:23cc3068a9e4 157 |---------|-----------|---------------------------------------|
mbed_official 125:23cc3068a9e4 158 | 1 | 1 | | SB | 8 bit data | PB | STB | |
mbed_official 125:23cc3068a9e4 159 +-------------------------------------------------------------+
mbed_official 125:23cc3068a9e4 160 [..]
mbed_official 125:23cc3068a9e4 161 (++) Hardware flow control.
mbed_official 125:23cc3068a9e4 162 (++) Receiver/transmitter modes.
mbed_official 125:23cc3068a9e4 163 [..] The USART_Init() function follows the USART asynchronous configuration
mbed_official 125:23cc3068a9e4 164 procedure(details for the procedure are available in reference manual.
mbed_official 125:23cc3068a9e4 165 (+) For the synchronous mode in addition to the asynchronous mode parameters
mbed_official 125:23cc3068a9e4 166 these parameters should be also configured:
mbed_official 125:23cc3068a9e4 167 (++) USART Clock Enabled.
mbed_official 125:23cc3068a9e4 168 (++) USART polarity.
mbed_official 125:23cc3068a9e4 169 (++) USART phase.
mbed_official 125:23cc3068a9e4 170 (++) USART LastBit.
mbed_official 125:23cc3068a9e4 171 [..] These parameters can be configured using the USART_ClockInit() function.
mbed_official 125:23cc3068a9e4 172
mbed_official 125:23cc3068a9e4 173 @endverbatim
mbed_official 125:23cc3068a9e4 174 * @{
mbed_official 125:23cc3068a9e4 175 */
mbed_official 125:23cc3068a9e4 176
mbed_official 125:23cc3068a9e4 177 /**
mbed_official 125:23cc3068a9e4 178 * @brief Deinitializes the USARTx peripheral registers to their default reset values.
mbed_official 125:23cc3068a9e4 179 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 180 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 181 * @retval None
mbed_official 125:23cc3068a9e4 182 */
mbed_official 125:23cc3068a9e4 183 void USART_DeInit(USART_TypeDef* USARTx)
mbed_official 125:23cc3068a9e4 184 {
mbed_official 125:23cc3068a9e4 185 /* Check the parameters */
mbed_official 125:23cc3068a9e4 186 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 187
mbed_official 125:23cc3068a9e4 188 if (USARTx == USART1)
mbed_official 125:23cc3068a9e4 189 {
mbed_official 125:23cc3068a9e4 190 RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, ENABLE);
mbed_official 125:23cc3068a9e4 191 RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, DISABLE);
mbed_official 125:23cc3068a9e4 192 }
mbed_official 125:23cc3068a9e4 193 else if (USARTx == USART2)
mbed_official 125:23cc3068a9e4 194 {
mbed_official 125:23cc3068a9e4 195 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, ENABLE);
mbed_official 125:23cc3068a9e4 196 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, DISABLE);
mbed_official 125:23cc3068a9e4 197 }
mbed_official 125:23cc3068a9e4 198 else if (USARTx == USART3)
mbed_official 125:23cc3068a9e4 199 {
mbed_official 125:23cc3068a9e4 200 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, ENABLE);
mbed_official 125:23cc3068a9e4 201 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, DISABLE);
mbed_official 125:23cc3068a9e4 202 }
mbed_official 125:23cc3068a9e4 203 else if (USARTx == UART4)
mbed_official 125:23cc3068a9e4 204 {
mbed_official 125:23cc3068a9e4 205 RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART4, ENABLE);
mbed_official 125:23cc3068a9e4 206 RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART4, DISABLE);
mbed_official 125:23cc3068a9e4 207 }
mbed_official 125:23cc3068a9e4 208 else
mbed_official 125:23cc3068a9e4 209 {
mbed_official 125:23cc3068a9e4 210 if (USARTx == UART5)
mbed_official 125:23cc3068a9e4 211 {
mbed_official 125:23cc3068a9e4 212 RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART5, ENABLE);
mbed_official 125:23cc3068a9e4 213 RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART5, DISABLE);
mbed_official 125:23cc3068a9e4 214 }
mbed_official 125:23cc3068a9e4 215 }
mbed_official 125:23cc3068a9e4 216 }
mbed_official 125:23cc3068a9e4 217
mbed_official 125:23cc3068a9e4 218 /**
mbed_official 125:23cc3068a9e4 219 * @brief Initializes the USARTx peripheral according to the specified
mbed_official 125:23cc3068a9e4 220 * parameters in the USART_InitStruct .
mbed_official 125:23cc3068a9e4 221 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 222 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 223 * @param USART_InitStruct: pointer to a USART_InitTypeDef structure
mbed_official 125:23cc3068a9e4 224 * that contains the configuration information for the specified USART peripheral.
mbed_official 125:23cc3068a9e4 225 * @retval None
mbed_official 125:23cc3068a9e4 226 */
mbed_official 125:23cc3068a9e4 227 void USART_Init(USART_TypeDef* USARTx, USART_InitTypeDef* USART_InitStruct)
mbed_official 125:23cc3068a9e4 228 {
mbed_official 125:23cc3068a9e4 229 uint32_t divider = 0, apbclock = 0, tmpreg = 0;
mbed_official 125:23cc3068a9e4 230 RCC_ClocksTypeDef RCC_ClocksStatus;
mbed_official 125:23cc3068a9e4 231
mbed_official 125:23cc3068a9e4 232 /* Check the parameters */
mbed_official 125:23cc3068a9e4 233 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 234 assert_param(IS_USART_BAUDRATE(USART_InitStruct->USART_BaudRate));
mbed_official 125:23cc3068a9e4 235 assert_param(IS_USART_WORD_LENGTH(USART_InitStruct->USART_WordLength));
mbed_official 125:23cc3068a9e4 236 assert_param(IS_USART_STOPBITS(USART_InitStruct->USART_StopBits));
mbed_official 125:23cc3068a9e4 237 assert_param(IS_USART_PARITY(USART_InitStruct->USART_Parity));
mbed_official 125:23cc3068a9e4 238 assert_param(IS_USART_MODE(USART_InitStruct->USART_Mode));
mbed_official 125:23cc3068a9e4 239 assert_param(IS_USART_HARDWARE_FLOW_CONTROL(USART_InitStruct->USART_HardwareFlowControl));
mbed_official 125:23cc3068a9e4 240
mbed_official 125:23cc3068a9e4 241 /* Disable USART */
mbed_official 125:23cc3068a9e4 242 USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_UE);
mbed_official 125:23cc3068a9e4 243
mbed_official 125:23cc3068a9e4 244 /*---------------------------- USART CR2 Configuration -----------------------*/
mbed_official 125:23cc3068a9e4 245 tmpreg = USARTx->CR2;
mbed_official 125:23cc3068a9e4 246 /* Clear STOP[13:12] bits */
mbed_official 125:23cc3068a9e4 247 tmpreg &= (uint32_t)~((uint32_t)USART_CR2_STOP);
mbed_official 125:23cc3068a9e4 248
mbed_official 125:23cc3068a9e4 249 /* Configure the USART Stop Bits, Clock, CPOL, CPHA and LastBit ------------*/
mbed_official 125:23cc3068a9e4 250 /* Set STOP[13:12] bits according to USART_StopBits value */
mbed_official 125:23cc3068a9e4 251 tmpreg |= (uint32_t)USART_InitStruct->USART_StopBits;
mbed_official 125:23cc3068a9e4 252
mbed_official 125:23cc3068a9e4 253 /* Write to USART CR2 */
mbed_official 125:23cc3068a9e4 254 USARTx->CR2 = tmpreg;
mbed_official 125:23cc3068a9e4 255
mbed_official 125:23cc3068a9e4 256 /*---------------------------- USART CR1 Configuration -----------------------*/
mbed_official 125:23cc3068a9e4 257 tmpreg = USARTx->CR1;
mbed_official 125:23cc3068a9e4 258 /* Clear M, PCE, PS, TE and RE bits */
mbed_official 125:23cc3068a9e4 259 tmpreg &= (uint32_t)~((uint32_t)CR1_CLEAR_MASK);
mbed_official 125:23cc3068a9e4 260
mbed_official 125:23cc3068a9e4 261 /* Configure the USART Word Length, Parity and mode ----------------------- */
mbed_official 125:23cc3068a9e4 262 /* Set the M bits according to USART_WordLength value */
mbed_official 125:23cc3068a9e4 263 /* Set PCE and PS bits according to USART_Parity value */
mbed_official 125:23cc3068a9e4 264 /* Set TE and RE bits according to USART_Mode value */
mbed_official 125:23cc3068a9e4 265 tmpreg |= (uint32_t)USART_InitStruct->USART_WordLength | USART_InitStruct->USART_Parity |
mbed_official 125:23cc3068a9e4 266 USART_InitStruct->USART_Mode;
mbed_official 125:23cc3068a9e4 267
mbed_official 125:23cc3068a9e4 268 /* Write to USART CR1 */
mbed_official 125:23cc3068a9e4 269 USARTx->CR1 = tmpreg;
mbed_official 125:23cc3068a9e4 270
mbed_official 125:23cc3068a9e4 271 /*---------------------------- USART CR3 Configuration -----------------------*/
mbed_official 125:23cc3068a9e4 272 tmpreg = USARTx->CR3;
mbed_official 125:23cc3068a9e4 273 /* Clear CTSE and RTSE bits */
mbed_official 125:23cc3068a9e4 274 tmpreg &= (uint32_t)~((uint32_t)CR3_CLEAR_MASK);
mbed_official 125:23cc3068a9e4 275
mbed_official 125:23cc3068a9e4 276 /* Configure the USART HFC -------------------------------------------------*/
mbed_official 125:23cc3068a9e4 277 /* Set CTSE and RTSE bits according to USART_HardwareFlowControl value */
mbed_official 125:23cc3068a9e4 278 tmpreg |= USART_InitStruct->USART_HardwareFlowControl;
mbed_official 125:23cc3068a9e4 279
mbed_official 125:23cc3068a9e4 280 /* Write to USART CR3 */
mbed_official 125:23cc3068a9e4 281 USARTx->CR3 = tmpreg;
mbed_official 125:23cc3068a9e4 282
mbed_official 125:23cc3068a9e4 283 /*---------------------------- USART BRR Configuration -----------------------*/
mbed_official 125:23cc3068a9e4 284 /* Configure the USART Baud Rate -------------------------------------------*/
mbed_official 125:23cc3068a9e4 285 RCC_GetClocksFreq(&RCC_ClocksStatus);
mbed_official 125:23cc3068a9e4 286
mbed_official 125:23cc3068a9e4 287 if (USARTx == USART1)
mbed_official 125:23cc3068a9e4 288 {
mbed_official 125:23cc3068a9e4 289 apbclock = RCC_ClocksStatus.USART1CLK_Frequency;
mbed_official 125:23cc3068a9e4 290 }
mbed_official 125:23cc3068a9e4 291 else if (USARTx == USART2)
mbed_official 125:23cc3068a9e4 292 {
mbed_official 125:23cc3068a9e4 293 apbclock = RCC_ClocksStatus.USART2CLK_Frequency;
mbed_official 125:23cc3068a9e4 294 }
mbed_official 125:23cc3068a9e4 295 else if (USARTx == USART3)
mbed_official 125:23cc3068a9e4 296 {
mbed_official 125:23cc3068a9e4 297 apbclock = RCC_ClocksStatus.USART3CLK_Frequency;
mbed_official 125:23cc3068a9e4 298 }
mbed_official 125:23cc3068a9e4 299 else if (USARTx == UART4)
mbed_official 125:23cc3068a9e4 300 {
mbed_official 125:23cc3068a9e4 301 apbclock = RCC_ClocksStatus.UART4CLK_Frequency;
mbed_official 125:23cc3068a9e4 302 }
mbed_official 125:23cc3068a9e4 303 else
mbed_official 125:23cc3068a9e4 304 {
mbed_official 125:23cc3068a9e4 305 apbclock = RCC_ClocksStatus.UART5CLK_Frequency;
mbed_official 125:23cc3068a9e4 306 }
mbed_official 125:23cc3068a9e4 307
mbed_official 125:23cc3068a9e4 308 /* Determine the integer part */
mbed_official 125:23cc3068a9e4 309 if ((USARTx->CR1 & USART_CR1_OVER8) != 0)
mbed_official 125:23cc3068a9e4 310 {
mbed_official 125:23cc3068a9e4 311 /* (divider * 10) computing in case Oversampling mode is 8 Samples */
mbed_official 125:23cc3068a9e4 312 divider = (uint32_t)((2 * apbclock) / (USART_InitStruct->USART_BaudRate));
mbed_official 125:23cc3068a9e4 313 tmpreg = (uint32_t)((2 * apbclock) % (USART_InitStruct->USART_BaudRate));
mbed_official 125:23cc3068a9e4 314 }
mbed_official 125:23cc3068a9e4 315 else /* if ((USARTx->CR1 & CR1_OVER8_Set) == 0) */
mbed_official 125:23cc3068a9e4 316 {
mbed_official 125:23cc3068a9e4 317 /* (divider * 10) computing in case Oversampling mode is 16 Samples */
mbed_official 125:23cc3068a9e4 318 divider = (uint32_t)((apbclock) / (USART_InitStruct->USART_BaudRate));
mbed_official 125:23cc3068a9e4 319 tmpreg = (uint32_t)((apbclock) % (USART_InitStruct->USART_BaudRate));
mbed_official 125:23cc3068a9e4 320 }
mbed_official 125:23cc3068a9e4 321
mbed_official 125:23cc3068a9e4 322 /* round the divider : if fractional part i greater than 0.5 increment divider */
mbed_official 125:23cc3068a9e4 323 if (tmpreg >= (USART_InitStruct->USART_BaudRate) / 2)
mbed_official 125:23cc3068a9e4 324 {
mbed_official 125:23cc3068a9e4 325 divider++;
mbed_official 125:23cc3068a9e4 326 }
mbed_official 125:23cc3068a9e4 327
mbed_official 125:23cc3068a9e4 328 /* Implement the divider in case Oversampling mode is 8 Samples */
mbed_official 125:23cc3068a9e4 329 if ((USARTx->CR1 & USART_CR1_OVER8) != 0)
mbed_official 125:23cc3068a9e4 330 {
mbed_official 125:23cc3068a9e4 331 /* get the LSB of divider and shift it to the right by 1 bit */
mbed_official 125:23cc3068a9e4 332 tmpreg = (divider & (uint16_t)0x000F) >> 1;
mbed_official 125:23cc3068a9e4 333
mbed_official 125:23cc3068a9e4 334 /* update the divider value */
mbed_official 125:23cc3068a9e4 335 divider = (divider & (uint16_t)0xFFF0) | tmpreg;
mbed_official 125:23cc3068a9e4 336 }
mbed_official 125:23cc3068a9e4 337
mbed_official 125:23cc3068a9e4 338 /* Write to USART BRR */
mbed_official 125:23cc3068a9e4 339 USARTx->BRR = (uint16_t)divider;
mbed_official 125:23cc3068a9e4 340 }
mbed_official 125:23cc3068a9e4 341
mbed_official 125:23cc3068a9e4 342 /**
mbed_official 125:23cc3068a9e4 343 * @brief Fills each USART_InitStruct member with its default value.
mbed_official 125:23cc3068a9e4 344 * @param USART_InitStruct: pointer to a USART_InitTypeDef structure
mbed_official 125:23cc3068a9e4 345 * which will be initialized.
mbed_official 125:23cc3068a9e4 346 * @retval None
mbed_official 125:23cc3068a9e4 347 */
mbed_official 125:23cc3068a9e4 348 void USART_StructInit(USART_InitTypeDef* USART_InitStruct)
mbed_official 125:23cc3068a9e4 349 {
mbed_official 125:23cc3068a9e4 350 /* USART_InitStruct members default value */
mbed_official 125:23cc3068a9e4 351 USART_InitStruct->USART_BaudRate = 9600;
mbed_official 125:23cc3068a9e4 352 USART_InitStruct->USART_WordLength = USART_WordLength_8b;
mbed_official 125:23cc3068a9e4 353 USART_InitStruct->USART_StopBits = USART_StopBits_1;
mbed_official 125:23cc3068a9e4 354 USART_InitStruct->USART_Parity = USART_Parity_No ;
mbed_official 125:23cc3068a9e4 355 USART_InitStruct->USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
mbed_official 125:23cc3068a9e4 356 USART_InitStruct->USART_HardwareFlowControl = USART_HardwareFlowControl_None;
mbed_official 125:23cc3068a9e4 357 }
mbed_official 125:23cc3068a9e4 358
mbed_official 125:23cc3068a9e4 359 /**
mbed_official 125:23cc3068a9e4 360 * @brief Initializes the USARTx peripheral Clock according to the
mbed_official 125:23cc3068a9e4 361 * specified parameters in the USART_ClockInitStruct.
mbed_official 125:23cc3068a9e4 362 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 363 * following values: USART1 or USART2 or USART3.
mbed_official 125:23cc3068a9e4 364 * @param USART_ClockInitStruct: pointer to a USART_ClockInitTypeDef
mbed_official 125:23cc3068a9e4 365 * structure that contains the configuration information for the specified
mbed_official 125:23cc3068a9e4 366 * USART peripheral.
mbed_official 125:23cc3068a9e4 367 * @retval None
mbed_official 125:23cc3068a9e4 368 */
mbed_official 125:23cc3068a9e4 369 void USART_ClockInit(USART_TypeDef* USARTx, USART_ClockInitTypeDef* USART_ClockInitStruct)
mbed_official 125:23cc3068a9e4 370 {
mbed_official 125:23cc3068a9e4 371 uint32_t tmpreg = 0;
mbed_official 125:23cc3068a9e4 372 /* Check the parameters */
mbed_official 125:23cc3068a9e4 373 assert_param(IS_USART_123_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 374 assert_param(IS_USART_CLOCK(USART_ClockInitStruct->USART_Clock));
mbed_official 125:23cc3068a9e4 375 assert_param(IS_USART_CPOL(USART_ClockInitStruct->USART_CPOL));
mbed_official 125:23cc3068a9e4 376 assert_param(IS_USART_CPHA(USART_ClockInitStruct->USART_CPHA));
mbed_official 125:23cc3068a9e4 377 assert_param(IS_USART_LASTBIT(USART_ClockInitStruct->USART_LastBit));
mbed_official 125:23cc3068a9e4 378 /*---------------------------- USART CR2 Configuration -----------------------*/
mbed_official 125:23cc3068a9e4 379 tmpreg = USARTx->CR2;
mbed_official 125:23cc3068a9e4 380 /* Clear CLKEN, CPOL, CPHA, LBCL and SSM bits */
mbed_official 125:23cc3068a9e4 381 tmpreg &= (uint32_t)~((uint32_t)CR2_CLOCK_CLEAR_MASK);
mbed_official 125:23cc3068a9e4 382 /* Configure the USART Clock, CPOL, CPHA, LastBit and SSM ------------*/
mbed_official 125:23cc3068a9e4 383 /* Set CLKEN bit according to USART_Clock value */
mbed_official 125:23cc3068a9e4 384 /* Set CPOL bit according to USART_CPOL value */
mbed_official 125:23cc3068a9e4 385 /* Set CPHA bit according to USART_CPHA value */
mbed_official 125:23cc3068a9e4 386 /* Set LBCL bit according to USART_LastBit value */
mbed_official 125:23cc3068a9e4 387 tmpreg |= (uint32_t)(USART_ClockInitStruct->USART_Clock | USART_ClockInitStruct->USART_CPOL |
mbed_official 125:23cc3068a9e4 388 USART_ClockInitStruct->USART_CPHA | USART_ClockInitStruct->USART_LastBit);
mbed_official 125:23cc3068a9e4 389 /* Write to USART CR2 */
mbed_official 125:23cc3068a9e4 390 USARTx->CR2 = tmpreg;
mbed_official 125:23cc3068a9e4 391 }
mbed_official 125:23cc3068a9e4 392
mbed_official 125:23cc3068a9e4 393 /**
mbed_official 125:23cc3068a9e4 394 * @brief Fills each USART_ClockInitStruct member with its default value.
mbed_official 125:23cc3068a9e4 395 * @param USART_ClockInitStruct: pointer to a USART_ClockInitTypeDef
mbed_official 125:23cc3068a9e4 396 * structure which will be initialized.
mbed_official 125:23cc3068a9e4 397 * @retval None
mbed_official 125:23cc3068a9e4 398 */
mbed_official 125:23cc3068a9e4 399 void USART_ClockStructInit(USART_ClockInitTypeDef* USART_ClockInitStruct)
mbed_official 125:23cc3068a9e4 400 {
mbed_official 125:23cc3068a9e4 401 /* USART_ClockInitStruct members default value */
mbed_official 125:23cc3068a9e4 402 USART_ClockInitStruct->USART_Clock = USART_Clock_Disable;
mbed_official 125:23cc3068a9e4 403 USART_ClockInitStruct->USART_CPOL = USART_CPOL_Low;
mbed_official 125:23cc3068a9e4 404 USART_ClockInitStruct->USART_CPHA = USART_CPHA_1Edge;
mbed_official 125:23cc3068a9e4 405 USART_ClockInitStruct->USART_LastBit = USART_LastBit_Disable;
mbed_official 125:23cc3068a9e4 406 }
mbed_official 125:23cc3068a9e4 407
mbed_official 125:23cc3068a9e4 408 /**
mbed_official 125:23cc3068a9e4 409 * @brief Enables or disables the specified USART peripheral.
mbed_official 125:23cc3068a9e4 410 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 411 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 412 * @param NewState: new state of the USARTx peripheral.
mbed_official 125:23cc3068a9e4 413 * This parameter can be: ENABLE or DISABLE.
mbed_official 125:23cc3068a9e4 414 * @retval None
mbed_official 125:23cc3068a9e4 415 */
mbed_official 125:23cc3068a9e4 416 void USART_Cmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 125:23cc3068a9e4 417 {
mbed_official 125:23cc3068a9e4 418 /* Check the parameters */
mbed_official 125:23cc3068a9e4 419 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 420 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 125:23cc3068a9e4 421
mbed_official 125:23cc3068a9e4 422 if (NewState != DISABLE)
mbed_official 125:23cc3068a9e4 423 {
mbed_official 125:23cc3068a9e4 424 /* Enable the selected USART by setting the UE bit in the CR1 register */
mbed_official 125:23cc3068a9e4 425 USARTx->CR1 |= USART_CR1_UE;
mbed_official 125:23cc3068a9e4 426 }
mbed_official 125:23cc3068a9e4 427 else
mbed_official 125:23cc3068a9e4 428 {
mbed_official 125:23cc3068a9e4 429 /* Disable the selected USART by clearing the UE bit in the CR1 register */
mbed_official 125:23cc3068a9e4 430 USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_UE);
mbed_official 125:23cc3068a9e4 431 }
mbed_official 125:23cc3068a9e4 432 }
mbed_official 125:23cc3068a9e4 433
mbed_official 125:23cc3068a9e4 434 /**
mbed_official 125:23cc3068a9e4 435 * @brief Enables or disables the USART's transmitter or receiver.
mbed_official 125:23cc3068a9e4 436 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 437 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 438 * @param USART_Direction: specifies the USART direction.
mbed_official 125:23cc3068a9e4 439 * This parameter can be any combination of the following values:
mbed_official 125:23cc3068a9e4 440 * @arg USART_Mode_Tx: USART Transmitter
mbed_official 125:23cc3068a9e4 441 * @arg USART_Mode_Rx: USART Receiver
mbed_official 125:23cc3068a9e4 442 * @param NewState: new state of the USART transfer direction.
mbed_official 125:23cc3068a9e4 443 * This parameter can be: ENABLE or DISABLE.
mbed_official 125:23cc3068a9e4 444 * @retval None
mbed_official 125:23cc3068a9e4 445 */
mbed_official 125:23cc3068a9e4 446 void USART_DirectionModeCmd(USART_TypeDef* USARTx, uint32_t USART_DirectionMode, FunctionalState NewState)
mbed_official 125:23cc3068a9e4 447 {
mbed_official 125:23cc3068a9e4 448 /* Check the parameters */
mbed_official 125:23cc3068a9e4 449 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 450 assert_param(IS_USART_MODE(USART_DirectionMode));
mbed_official 125:23cc3068a9e4 451 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 125:23cc3068a9e4 452
mbed_official 125:23cc3068a9e4 453 if (NewState != DISABLE)
mbed_official 125:23cc3068a9e4 454 {
mbed_official 125:23cc3068a9e4 455 /* Enable the USART's transfer interface by setting the TE and/or RE bits
mbed_official 125:23cc3068a9e4 456 in the USART CR1 register */
mbed_official 125:23cc3068a9e4 457 USARTx->CR1 |= USART_DirectionMode;
mbed_official 125:23cc3068a9e4 458 }
mbed_official 125:23cc3068a9e4 459 else
mbed_official 125:23cc3068a9e4 460 {
mbed_official 125:23cc3068a9e4 461 /* Disable the USART's transfer interface by clearing the TE and/or RE bits
mbed_official 125:23cc3068a9e4 462 in the USART CR3 register */
mbed_official 125:23cc3068a9e4 463 USARTx->CR1 &= (uint32_t)~USART_DirectionMode;
mbed_official 125:23cc3068a9e4 464 }
mbed_official 125:23cc3068a9e4 465 }
mbed_official 125:23cc3068a9e4 466
mbed_official 125:23cc3068a9e4 467 /**
mbed_official 125:23cc3068a9e4 468 * @brief Enables or disables the USART's 8x oversampling mode.
mbed_official 125:23cc3068a9e4 469 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 470 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 471 * @param NewState: new state of the USART 8x oversampling mode.
mbed_official 125:23cc3068a9e4 472 * This parameter can be: ENABLE or DISABLE.
mbed_official 125:23cc3068a9e4 473 * @note
mbed_official 125:23cc3068a9e4 474 * This function has to be called before calling USART_Init()
mbed_official 125:23cc3068a9e4 475 * function in order to have correct baudrate Divider value.
mbed_official 125:23cc3068a9e4 476 * @retval None
mbed_official 125:23cc3068a9e4 477 */
mbed_official 125:23cc3068a9e4 478 void USART_OverSampling8Cmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 125:23cc3068a9e4 479 {
mbed_official 125:23cc3068a9e4 480 /* Check the parameters */
mbed_official 125:23cc3068a9e4 481 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 482 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 125:23cc3068a9e4 483
mbed_official 125:23cc3068a9e4 484 if (NewState != DISABLE)
mbed_official 125:23cc3068a9e4 485 {
mbed_official 125:23cc3068a9e4 486 /* Enable the 8x Oversampling mode by setting the OVER8 bit in the CR1 register */
mbed_official 125:23cc3068a9e4 487 USARTx->CR1 |= USART_CR1_OVER8;
mbed_official 125:23cc3068a9e4 488 }
mbed_official 125:23cc3068a9e4 489 else
mbed_official 125:23cc3068a9e4 490 {
mbed_official 125:23cc3068a9e4 491 /* Disable the 8x Oversampling mode by clearing the OVER8 bit in the CR1 register */
mbed_official 125:23cc3068a9e4 492 USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_OVER8);
mbed_official 125:23cc3068a9e4 493 }
mbed_official 125:23cc3068a9e4 494 }
mbed_official 125:23cc3068a9e4 495
mbed_official 125:23cc3068a9e4 496 /**
mbed_official 125:23cc3068a9e4 497 * @brief Enables or disables the USART's one bit sampling method.
mbed_official 125:23cc3068a9e4 498 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 499 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 500 * @param NewState: new state of the USART one bit sampling method.
mbed_official 125:23cc3068a9e4 501 * This parameter can be: ENABLE or DISABLE.
mbed_official 125:23cc3068a9e4 502 * @note
mbed_official 125:23cc3068a9e4 503 * This function has to be called before calling USART_Cmd() function.
mbed_official 125:23cc3068a9e4 504 * @retval None
mbed_official 125:23cc3068a9e4 505 */
mbed_official 125:23cc3068a9e4 506 void USART_OneBitMethodCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 125:23cc3068a9e4 507 {
mbed_official 125:23cc3068a9e4 508 /* Check the parameters */
mbed_official 125:23cc3068a9e4 509 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 510 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 125:23cc3068a9e4 511
mbed_official 125:23cc3068a9e4 512 if (NewState != DISABLE)
mbed_official 125:23cc3068a9e4 513 {
mbed_official 125:23cc3068a9e4 514 /* Enable the one bit method by setting the ONEBIT bit in the CR3 register */
mbed_official 125:23cc3068a9e4 515 USARTx->CR3 |= USART_CR3_ONEBIT;
mbed_official 125:23cc3068a9e4 516 }
mbed_official 125:23cc3068a9e4 517 else
mbed_official 125:23cc3068a9e4 518 {
mbed_official 125:23cc3068a9e4 519 /* Disable the one bit method by clearing the ONEBIT bit in the CR3 register */
mbed_official 125:23cc3068a9e4 520 USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_ONEBIT);
mbed_official 125:23cc3068a9e4 521 }
mbed_official 125:23cc3068a9e4 522 }
mbed_official 125:23cc3068a9e4 523
mbed_official 125:23cc3068a9e4 524 /**
mbed_official 125:23cc3068a9e4 525 * @brief Enables or disables the USART's most significant bit first
mbed_official 125:23cc3068a9e4 526 * transmitted/received following the start bit.
mbed_official 125:23cc3068a9e4 527 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 528 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 529 * @param NewState: new state of the USART most significant bit first
mbed_official 125:23cc3068a9e4 530 * transmitted/received following the start bit.
mbed_official 125:23cc3068a9e4 531 * This parameter can be: ENABLE or DISABLE.
mbed_official 125:23cc3068a9e4 532 * @note
mbed_official 125:23cc3068a9e4 533 * This function has to be called before calling USART_Cmd() function.
mbed_official 125:23cc3068a9e4 534 * @retval None
mbed_official 125:23cc3068a9e4 535 */
mbed_official 125:23cc3068a9e4 536 void USART_MSBFirstCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 125:23cc3068a9e4 537 {
mbed_official 125:23cc3068a9e4 538 /* Check the parameters */
mbed_official 125:23cc3068a9e4 539 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 540 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 125:23cc3068a9e4 541
mbed_official 125:23cc3068a9e4 542 if (NewState != DISABLE)
mbed_official 125:23cc3068a9e4 543 {
mbed_official 125:23cc3068a9e4 544 /* Enable the most significant bit first transmitted/received following the
mbed_official 125:23cc3068a9e4 545 start bit by setting the MSBFIRST bit in the CR2 register */
mbed_official 125:23cc3068a9e4 546 USARTx->CR2 |= USART_CR2_MSBFIRST;
mbed_official 125:23cc3068a9e4 547 }
mbed_official 125:23cc3068a9e4 548 else
mbed_official 125:23cc3068a9e4 549 {
mbed_official 125:23cc3068a9e4 550 /* Disable the most significant bit first transmitted/received following the
mbed_official 125:23cc3068a9e4 551 start bit by clearing the MSBFIRST bit in the CR2 register */
mbed_official 125:23cc3068a9e4 552 USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_MSBFIRST);
mbed_official 125:23cc3068a9e4 553 }
mbed_official 125:23cc3068a9e4 554 }
mbed_official 125:23cc3068a9e4 555
mbed_official 125:23cc3068a9e4 556 /**
mbed_official 125:23cc3068a9e4 557 * @brief Enables or disables the binary data inversion.
mbed_official 125:23cc3068a9e4 558 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 559 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 560 * @param NewState: new defined levels for the USART data.
mbed_official 125:23cc3068a9e4 561 * This parameter can be: ENABLE or DISABLE.
mbed_official 125:23cc3068a9e4 562 * @arg ENABLE: Logical data from the data register are send/received in negative
mbed_official 125:23cc3068a9e4 563 * logic. (1=L, 0=H). The parity bit is also inverted.
mbed_official 125:23cc3068a9e4 564 * @arg DISABLE: Logical data from the data register are send/received in positive
mbed_official 125:23cc3068a9e4 565 * logic. (1=H, 0=L)
mbed_official 125:23cc3068a9e4 566 * @note
mbed_official 125:23cc3068a9e4 567 * This function has to be called before calling USART_Cmd() function.
mbed_official 125:23cc3068a9e4 568 * @retval None
mbed_official 125:23cc3068a9e4 569 */
mbed_official 125:23cc3068a9e4 570 void USART_DataInvCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 125:23cc3068a9e4 571 {
mbed_official 125:23cc3068a9e4 572 /* Check the parameters */
mbed_official 125:23cc3068a9e4 573 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 574 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 125:23cc3068a9e4 575
mbed_official 125:23cc3068a9e4 576 if (NewState != DISABLE)
mbed_official 125:23cc3068a9e4 577 {
mbed_official 125:23cc3068a9e4 578 /* Enable the binary data inversion feature by setting the DATAINV bit in
mbed_official 125:23cc3068a9e4 579 the CR2 register */
mbed_official 125:23cc3068a9e4 580 USARTx->CR2 |= USART_CR2_DATAINV;
mbed_official 125:23cc3068a9e4 581 }
mbed_official 125:23cc3068a9e4 582 else
mbed_official 125:23cc3068a9e4 583 {
mbed_official 125:23cc3068a9e4 584 /* Disable the binary data inversion feature by clearing the DATAINV bit in
mbed_official 125:23cc3068a9e4 585 the CR2 register */
mbed_official 125:23cc3068a9e4 586 USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_DATAINV);
mbed_official 125:23cc3068a9e4 587 }
mbed_official 125:23cc3068a9e4 588 }
mbed_official 125:23cc3068a9e4 589
mbed_official 125:23cc3068a9e4 590 /**
mbed_official 125:23cc3068a9e4 591 * @brief Enables or disables the Pin(s) active level inversion.
mbed_official 125:23cc3068a9e4 592 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 593 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 594 * @param USART_InvPin: specifies the USART pin(s) to invert.
mbed_official 125:23cc3068a9e4 595 * This parameter can be any combination of the following values:
mbed_official 125:23cc3068a9e4 596 * @arg USART_InvPin_Tx: USART Tx pin active level inversion.
mbed_official 125:23cc3068a9e4 597 * @arg USART_InvPin_Rx: USART Rx pin active level inversion.
mbed_official 125:23cc3068a9e4 598 * @param NewState: new active level status for the USART pin(s).
mbed_official 125:23cc3068a9e4 599 * This parameter can be: ENABLE or DISABLE.
mbed_official 125:23cc3068a9e4 600 * - ENABLE: pin(s) signal values are inverted (Vdd =0, Gnd =1).
mbed_official 125:23cc3068a9e4 601 * - DISABLE: pin(s) signal works using the standard logic levels (Vdd =1, Gnd =0).
mbed_official 125:23cc3068a9e4 602 * @note
mbed_official 125:23cc3068a9e4 603 * This function has to be called before calling USART_Cmd() function.
mbed_official 125:23cc3068a9e4 604 * @retval None
mbed_official 125:23cc3068a9e4 605 */
mbed_official 125:23cc3068a9e4 606 void USART_InvPinCmd(USART_TypeDef* USARTx, uint32_t USART_InvPin, FunctionalState NewState)
mbed_official 125:23cc3068a9e4 607 {
mbed_official 125:23cc3068a9e4 608 /* Check the parameters */
mbed_official 125:23cc3068a9e4 609 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 610 assert_param(IS_USART_INVERSTION_PIN(USART_InvPin));
mbed_official 125:23cc3068a9e4 611 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 125:23cc3068a9e4 612
mbed_official 125:23cc3068a9e4 613 if (NewState != DISABLE)
mbed_official 125:23cc3068a9e4 614 {
mbed_official 125:23cc3068a9e4 615 /* Enable the active level inversion for selected pins by setting the TXINV
mbed_official 125:23cc3068a9e4 616 and/or RXINV bits in the USART CR2 register */
mbed_official 125:23cc3068a9e4 617 USARTx->CR2 |= USART_InvPin;
mbed_official 125:23cc3068a9e4 618 }
mbed_official 125:23cc3068a9e4 619 else
mbed_official 125:23cc3068a9e4 620 {
mbed_official 125:23cc3068a9e4 621 /* Disable the active level inversion for selected requests by clearing the
mbed_official 125:23cc3068a9e4 622 TXINV and/or RXINV bits in the USART CR2 register */
mbed_official 125:23cc3068a9e4 623 USARTx->CR2 &= (uint32_t)~USART_InvPin;
mbed_official 125:23cc3068a9e4 624 }
mbed_official 125:23cc3068a9e4 625 }
mbed_official 125:23cc3068a9e4 626
mbed_official 125:23cc3068a9e4 627 /**
mbed_official 125:23cc3068a9e4 628 * @brief Enables or disables the swap Tx/Rx pins.
mbed_official 125:23cc3068a9e4 629 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 630 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 631 * @param NewState: new state of the USARTx TX/RX pins pinout.
mbed_official 125:23cc3068a9e4 632 * This parameter can be: ENABLE or DISABLE.
mbed_official 125:23cc3068a9e4 633 * @arg ENABLE: The TX and RX pins functions are swapped.
mbed_official 125:23cc3068a9e4 634 * @arg DISABLE: TX/RX pins are used as defined in standard pinout
mbed_official 125:23cc3068a9e4 635 * @note
mbed_official 125:23cc3068a9e4 636 * This function has to be called before calling USART_Cmd() function.
mbed_official 125:23cc3068a9e4 637 * @retval None
mbed_official 125:23cc3068a9e4 638 */
mbed_official 125:23cc3068a9e4 639 void USART_SWAPPinCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 125:23cc3068a9e4 640 {
mbed_official 125:23cc3068a9e4 641 /* Check the parameters */
mbed_official 125:23cc3068a9e4 642 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 643 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 125:23cc3068a9e4 644
mbed_official 125:23cc3068a9e4 645 if (NewState != DISABLE)
mbed_official 125:23cc3068a9e4 646 {
mbed_official 125:23cc3068a9e4 647 /* Enable the SWAP feature by setting the SWAP bit in the CR2 register */
mbed_official 125:23cc3068a9e4 648 USARTx->CR2 |= USART_CR2_SWAP;
mbed_official 125:23cc3068a9e4 649 }
mbed_official 125:23cc3068a9e4 650 else
mbed_official 125:23cc3068a9e4 651 {
mbed_official 125:23cc3068a9e4 652 /* Disable the SWAP feature by clearing the SWAP bit in the CR2 register */
mbed_official 125:23cc3068a9e4 653 USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_SWAP);
mbed_official 125:23cc3068a9e4 654 }
mbed_official 125:23cc3068a9e4 655 }
mbed_official 125:23cc3068a9e4 656
mbed_official 125:23cc3068a9e4 657 /**
mbed_official 125:23cc3068a9e4 658 * @brief Enables or disables the receiver Time Out feature.
mbed_official 125:23cc3068a9e4 659 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 660 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 661 * @param NewState: new state of the USARTx receiver Time Out.
mbed_official 125:23cc3068a9e4 662 * This parameter can be: ENABLE or DISABLE.
mbed_official 125:23cc3068a9e4 663 * @retval None
mbed_official 125:23cc3068a9e4 664 */
mbed_official 125:23cc3068a9e4 665 void USART_ReceiverTimeOutCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 125:23cc3068a9e4 666 {
mbed_official 125:23cc3068a9e4 667 /* Check the parameters */
mbed_official 125:23cc3068a9e4 668 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 669 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 125:23cc3068a9e4 670
mbed_official 125:23cc3068a9e4 671 if (NewState != DISABLE)
mbed_official 125:23cc3068a9e4 672 {
mbed_official 125:23cc3068a9e4 673 /* Enable the receiver time out feature by setting the RTOEN bit in the CR2
mbed_official 125:23cc3068a9e4 674 register */
mbed_official 125:23cc3068a9e4 675 USARTx->CR2 |= USART_CR2_RTOEN;
mbed_official 125:23cc3068a9e4 676 }
mbed_official 125:23cc3068a9e4 677 else
mbed_official 125:23cc3068a9e4 678 {
mbed_official 125:23cc3068a9e4 679 /* Disable the receiver time out feature by clearing the RTOEN bit in the CR2
mbed_official 125:23cc3068a9e4 680 register */
mbed_official 125:23cc3068a9e4 681 USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_RTOEN);
mbed_official 125:23cc3068a9e4 682 }
mbed_official 125:23cc3068a9e4 683 }
mbed_official 125:23cc3068a9e4 684
mbed_official 125:23cc3068a9e4 685 /**
mbed_official 125:23cc3068a9e4 686 * @brief Sets the receiver Time Out value.
mbed_official 125:23cc3068a9e4 687 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 688 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 689 * @param USART_ReceiverTimeOut: specifies the Receiver Time Out value.
mbed_official 125:23cc3068a9e4 690 * @retval None
mbed_official 125:23cc3068a9e4 691 */
mbed_official 125:23cc3068a9e4 692 void USART_SetReceiverTimeOut(USART_TypeDef* USARTx, uint32_t USART_ReceiverTimeOut)
mbed_official 125:23cc3068a9e4 693 {
mbed_official 125:23cc3068a9e4 694 /* Check the parameters */
mbed_official 125:23cc3068a9e4 695 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 696 assert_param(IS_USART_TIMEOUT(USART_ReceiverTimeOut));
mbed_official 125:23cc3068a9e4 697
mbed_official 125:23cc3068a9e4 698 /* Clear the receiver Time Out value by clearing the RTO[23:0] bits in the RTOR
mbed_official 125:23cc3068a9e4 699 register */
mbed_official 125:23cc3068a9e4 700 USARTx->RTOR &= (uint32_t)~((uint32_t)USART_RTOR_RTO);
mbed_official 125:23cc3068a9e4 701 /* Set the receiver Time Out value by setting the RTO[23:0] bits in the RTOR
mbed_official 125:23cc3068a9e4 702 register */
mbed_official 125:23cc3068a9e4 703 USARTx->RTOR |= USART_ReceiverTimeOut;
mbed_official 125:23cc3068a9e4 704 }
mbed_official 125:23cc3068a9e4 705
mbed_official 125:23cc3068a9e4 706 /**
mbed_official 125:23cc3068a9e4 707 * @brief Sets the system clock prescaler.
mbed_official 125:23cc3068a9e4 708 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 709 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 710 * @param USART_Prescaler: specifies the prescaler clock.
mbed_official 125:23cc3068a9e4 711 * @note
mbed_official 125:23cc3068a9e4 712 * This function has to be called before calling USART_Cmd() function.
mbed_official 125:23cc3068a9e4 713 * @retval None
mbed_official 125:23cc3068a9e4 714 */
mbed_official 125:23cc3068a9e4 715 void USART_SetPrescaler(USART_TypeDef* USARTx, uint8_t USART_Prescaler)
mbed_official 125:23cc3068a9e4 716 {
mbed_official 125:23cc3068a9e4 717 /* Check the parameters */
mbed_official 125:23cc3068a9e4 718 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 719
mbed_official 125:23cc3068a9e4 720 /* Clear the USART prescaler */
mbed_official 125:23cc3068a9e4 721 USARTx->GTPR &= USART_GTPR_GT;
mbed_official 125:23cc3068a9e4 722 /* Set the USART prescaler */
mbed_official 125:23cc3068a9e4 723 USARTx->GTPR |= USART_Prescaler;
mbed_official 125:23cc3068a9e4 724 }
mbed_official 125:23cc3068a9e4 725
mbed_official 125:23cc3068a9e4 726 /**
mbed_official 125:23cc3068a9e4 727 * @}
mbed_official 125:23cc3068a9e4 728 */
mbed_official 125:23cc3068a9e4 729
mbed_official 125:23cc3068a9e4 730
mbed_official 125:23cc3068a9e4 731 /** @defgroup USART_Group2 STOP Mode functions
mbed_official 125:23cc3068a9e4 732 * @brief STOP Mode functions
mbed_official 125:23cc3068a9e4 733 *
mbed_official 125:23cc3068a9e4 734 @verbatim
mbed_official 125:23cc3068a9e4 735 ===============================================================================
mbed_official 125:23cc3068a9e4 736 ##### STOP Mode functions #####
mbed_official 125:23cc3068a9e4 737 ===============================================================================
mbed_official 125:23cc3068a9e4 738 [..] This subsection provides a set of functions allowing to manage
mbed_official 125:23cc3068a9e4 739 WakeUp from STOP mode.
mbed_official 125:23cc3068a9e4 740
mbed_official 125:23cc3068a9e4 741 [..] The USART is able to WakeUp from Stop Mode if USART clock is set to HSI
mbed_official 125:23cc3068a9e4 742 or LSI.
mbed_official 125:23cc3068a9e4 743
mbed_official 125:23cc3068a9e4 744 [..] The WakeUp source is configured by calling USART_StopModeWakeUpSourceConfig()
mbed_official 125:23cc3068a9e4 745 function.
mbed_official 125:23cc3068a9e4 746
mbed_official 125:23cc3068a9e4 747 [..] After configuring the source of WakeUp and before entering in Stop Mode
mbed_official 125:23cc3068a9e4 748 USART_STOPModeCmd() function should be called to allow USART WakeUp.
mbed_official 125:23cc3068a9e4 749
mbed_official 125:23cc3068a9e4 750 @endverbatim
mbed_official 125:23cc3068a9e4 751 * @{
mbed_official 125:23cc3068a9e4 752 */
mbed_official 125:23cc3068a9e4 753
mbed_official 125:23cc3068a9e4 754 /**
mbed_official 125:23cc3068a9e4 755 * @brief Enables or disables the specified USART peripheral in STOP Mode.
mbed_official 125:23cc3068a9e4 756 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 757 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 758 * @param NewState: new state of the USARTx peripheral state in stop mode.
mbed_official 125:23cc3068a9e4 759 * This parameter can be: ENABLE or DISABLE.
mbed_official 125:23cc3068a9e4 760 * @note
mbed_official 125:23cc3068a9e4 761 * This function has to be called when USART clock is set to HSI or LSE.
mbed_official 125:23cc3068a9e4 762 * @retval None
mbed_official 125:23cc3068a9e4 763 */
mbed_official 125:23cc3068a9e4 764 void USART_STOPModeCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 125:23cc3068a9e4 765 {
mbed_official 125:23cc3068a9e4 766 /* Check the parameters */
mbed_official 125:23cc3068a9e4 767 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 768 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 125:23cc3068a9e4 769
mbed_official 125:23cc3068a9e4 770 if (NewState != DISABLE)
mbed_official 125:23cc3068a9e4 771 {
mbed_official 125:23cc3068a9e4 772 /* Enable the selected USART in STOP mode by setting the UESM bit in the CR1
mbed_official 125:23cc3068a9e4 773 register */
mbed_official 125:23cc3068a9e4 774 USARTx->CR1 |= USART_CR1_UESM;
mbed_official 125:23cc3068a9e4 775 }
mbed_official 125:23cc3068a9e4 776 else
mbed_official 125:23cc3068a9e4 777 {
mbed_official 125:23cc3068a9e4 778 /* Disable the selected USART in STOP mode by clearing the UE bit in the CR1
mbed_official 125:23cc3068a9e4 779 register */
mbed_official 125:23cc3068a9e4 780 USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_UESM);
mbed_official 125:23cc3068a9e4 781 }
mbed_official 125:23cc3068a9e4 782 }
mbed_official 125:23cc3068a9e4 783
mbed_official 125:23cc3068a9e4 784 /**
mbed_official 125:23cc3068a9e4 785 * @brief Selects the USART WakeUp method form stop mode.
mbed_official 125:23cc3068a9e4 786 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 787 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 788 * @param USART_WakeUp: specifies the selected USART wakeup method.
mbed_official 125:23cc3068a9e4 789 * This parameter can be one of the following values:
mbed_official 125:23cc3068a9e4 790 * @arg USART_WakeUpSource_AddressMatch: WUF active on address match.
mbed_official 125:23cc3068a9e4 791 * @arg USART_WakeUpSource_StartBit: WUF active on Start bit detection.
mbed_official 125:23cc3068a9e4 792 * @arg USART_WakeUpSource_RXNE: WUF active on RXNE.
mbed_official 125:23cc3068a9e4 793 * @note
mbed_official 125:23cc3068a9e4 794 * This function has to be called before calling USART_Cmd() function.
mbed_official 125:23cc3068a9e4 795 * @retval None
mbed_official 125:23cc3068a9e4 796 */
mbed_official 125:23cc3068a9e4 797 void USART_StopModeWakeUpSourceConfig(USART_TypeDef* USARTx, uint32_t USART_WakeUpSource)
mbed_official 125:23cc3068a9e4 798 {
mbed_official 125:23cc3068a9e4 799 /* Check the parameters */
mbed_official 125:23cc3068a9e4 800 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 801 assert_param(IS_USART_STOPMODE_WAKEUPSOURCE(USART_WakeUpSource));
mbed_official 125:23cc3068a9e4 802
mbed_official 125:23cc3068a9e4 803 USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_WUS);
mbed_official 125:23cc3068a9e4 804 USARTx->CR3 |= USART_WakeUpSource;
mbed_official 125:23cc3068a9e4 805 }
mbed_official 125:23cc3068a9e4 806
mbed_official 125:23cc3068a9e4 807 /**
mbed_official 125:23cc3068a9e4 808 * @}
mbed_official 125:23cc3068a9e4 809 */
mbed_official 125:23cc3068a9e4 810
mbed_official 125:23cc3068a9e4 811
mbed_official 125:23cc3068a9e4 812 /** @defgroup USART_Group3 AutoBaudRate functions
mbed_official 125:23cc3068a9e4 813 * @brief AutoBaudRate functions
mbed_official 125:23cc3068a9e4 814 *
mbed_official 125:23cc3068a9e4 815 @verbatim
mbed_official 125:23cc3068a9e4 816 ===============================================================================
mbed_official 125:23cc3068a9e4 817 ##### AutoBaudRate functions #####
mbed_official 125:23cc3068a9e4 818 ===============================================================================
mbed_official 125:23cc3068a9e4 819 [..] This subsection provides a set of functions allowing to manage
mbed_official 125:23cc3068a9e4 820 the AutoBaudRate detections.
mbed_official 125:23cc3068a9e4 821
mbed_official 125:23cc3068a9e4 822 [..] Before Enabling AutoBaudRate detection using USART_AutoBaudRateCmd ()
mbed_official 125:23cc3068a9e4 823 The character patterns used to calculate baudrate must be chosen by calling
mbed_official 125:23cc3068a9e4 824 USART_AutoBaudRateConfig() function. These function take as parameter :
mbed_official 125:23cc3068a9e4 825 (#)USART_AutoBaudRate_StartBit : any character starting with a bit 1.
mbed_official 125:23cc3068a9e4 826 (#)USART_AutoBaudRate_FallingEdge : any character starting with a 10xx bit pattern.
mbed_official 125:23cc3068a9e4 827
mbed_official 125:23cc3068a9e4 828 [..] At any later time, another request for AutoBaudRate detection can be performed
mbed_official 125:23cc3068a9e4 829 using USART_RequestCmd() function.
mbed_official 125:23cc3068a9e4 830
mbed_official 125:23cc3068a9e4 831 [..] The AutoBaudRate detection is monitored by the status of ABRF flag which indicate
mbed_official 125:23cc3068a9e4 832 that the AutoBaudRate detection is completed. In addition to ABRF flag, the ABRE flag
mbed_official 125:23cc3068a9e4 833 indicate that this procedure is completed without success. USART_GetFlagStatus ()
mbed_official 125:23cc3068a9e4 834 function should be used to monitor the status of these flags.
mbed_official 125:23cc3068a9e4 835
mbed_official 125:23cc3068a9e4 836 @endverbatim
mbed_official 125:23cc3068a9e4 837 * @{
mbed_official 125:23cc3068a9e4 838 */
mbed_official 125:23cc3068a9e4 839
mbed_official 125:23cc3068a9e4 840 /**
mbed_official 125:23cc3068a9e4 841 * @brief Enables or disables the Auto Baud Rate.
mbed_official 125:23cc3068a9e4 842 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 843 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 844 * @param NewState: new state of the USARTx auto baud rate.
mbed_official 125:23cc3068a9e4 845 * This parameter can be: ENABLE or DISABLE.
mbed_official 125:23cc3068a9e4 846 * @retval None
mbed_official 125:23cc3068a9e4 847 */
mbed_official 125:23cc3068a9e4 848 void USART_AutoBaudRateCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 125:23cc3068a9e4 849 {
mbed_official 125:23cc3068a9e4 850 /* Check the parameters */
mbed_official 125:23cc3068a9e4 851 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 852 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 125:23cc3068a9e4 853
mbed_official 125:23cc3068a9e4 854 if (NewState != DISABLE)
mbed_official 125:23cc3068a9e4 855 {
mbed_official 125:23cc3068a9e4 856 /* Enable the auto baud rate feature by setting the ABREN bit in the CR2
mbed_official 125:23cc3068a9e4 857 register */
mbed_official 125:23cc3068a9e4 858 USARTx->CR2 |= USART_CR2_ABREN;
mbed_official 125:23cc3068a9e4 859 }
mbed_official 125:23cc3068a9e4 860 else
mbed_official 125:23cc3068a9e4 861 {
mbed_official 125:23cc3068a9e4 862 /* Disable the auto baud rate feature by clearing the ABREN bit in the CR2
mbed_official 125:23cc3068a9e4 863 register */
mbed_official 125:23cc3068a9e4 864 USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_ABREN);
mbed_official 125:23cc3068a9e4 865 }
mbed_official 125:23cc3068a9e4 866 }
mbed_official 125:23cc3068a9e4 867
mbed_official 125:23cc3068a9e4 868 /**
mbed_official 125:23cc3068a9e4 869 * @brief Selects the USART auto baud rate method.
mbed_official 125:23cc3068a9e4 870 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 871 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 872 * @param USART_AutoBaudRate: specifies the selected USART auto baud rate method.
mbed_official 125:23cc3068a9e4 873 * This parameter can be one of the following values:
mbed_official 125:23cc3068a9e4 874 * @arg USART_AutoBaudRate_StartBit: Start Bit duration measurement.
mbed_official 125:23cc3068a9e4 875 * @arg USART_AutoBaudRate_FallingEdge: Falling edge to falling edge measurement.
mbed_official 125:23cc3068a9e4 876 * @arg USART_AutoBaudRate_0x7FFrame: 0x7F frame.
mbed_official 125:23cc3068a9e4 877 * @arg USART_AutoBaudRate_0x55Frame: 0x55 frame.
mbed_official 125:23cc3068a9e4 878 * @note
mbed_official 125:23cc3068a9e4 879 * This function has to be called before calling USART_Cmd() function.
mbed_official 125:23cc3068a9e4 880 * @retval None
mbed_official 125:23cc3068a9e4 881 */
mbed_official 125:23cc3068a9e4 882 void USART_AutoBaudRateConfig(USART_TypeDef* USARTx, uint32_t USART_AutoBaudRate)
mbed_official 125:23cc3068a9e4 883 {
mbed_official 125:23cc3068a9e4 884 /* Check the parameters */
mbed_official 125:23cc3068a9e4 885 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 886 assert_param(IS_USART_AUTOBAUDRATE_MODE(USART_AutoBaudRate));
mbed_official 125:23cc3068a9e4 887
mbed_official 125:23cc3068a9e4 888 USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_ABRMODE);
mbed_official 125:23cc3068a9e4 889 USARTx->CR2 |= USART_AutoBaudRate;
mbed_official 125:23cc3068a9e4 890 }
mbed_official 125:23cc3068a9e4 891
mbed_official 125:23cc3068a9e4 892 /**
mbed_official 125:23cc3068a9e4 893 * @}
mbed_official 125:23cc3068a9e4 894 */
mbed_official 125:23cc3068a9e4 895
mbed_official 125:23cc3068a9e4 896
mbed_official 125:23cc3068a9e4 897 /** @defgroup USART_Group4 Data transfers functions
mbed_official 125:23cc3068a9e4 898 * @brief Data transfers functions
mbed_official 125:23cc3068a9e4 899 *
mbed_official 125:23cc3068a9e4 900 @verbatim
mbed_official 125:23cc3068a9e4 901 ===============================================================================
mbed_official 125:23cc3068a9e4 902 ##### Data transfers functions #####
mbed_official 125:23cc3068a9e4 903 ===============================================================================
mbed_official 125:23cc3068a9e4 904 [..] This subsection provides a set of functions allowing to manage
mbed_official 125:23cc3068a9e4 905 the USART data transfers.
mbed_official 125:23cc3068a9e4 906 [..] During an USART reception, data shifts in least significant bit first
mbed_official 125:23cc3068a9e4 907 through the RX pin. When a transmission is taking place, a write instruction to
mbed_official 125:23cc3068a9e4 908 the USART_TDR register stores the data in the shift register.
mbed_official 125:23cc3068a9e4 909 [..] The read access of the USART_RDR register can be done using
mbed_official 125:23cc3068a9e4 910 the USART_ReceiveData() function and returns the RDR value.
mbed_official 125:23cc3068a9e4 911 Whereas a write access to the USART_TDR can be done using USART_SendData()
mbed_official 125:23cc3068a9e4 912 function and stores the written data into TDR.
mbed_official 125:23cc3068a9e4 913
mbed_official 125:23cc3068a9e4 914 @endverbatim
mbed_official 125:23cc3068a9e4 915 * @{
mbed_official 125:23cc3068a9e4 916 */
mbed_official 125:23cc3068a9e4 917
mbed_official 125:23cc3068a9e4 918 /**
mbed_official 125:23cc3068a9e4 919 * @brief Transmits single data through the USARTx peripheral.
mbed_official 125:23cc3068a9e4 920 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 921 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 922 * @param Data: the data to transmit.
mbed_official 125:23cc3068a9e4 923 * @retval None
mbed_official 125:23cc3068a9e4 924 */
mbed_official 125:23cc3068a9e4 925 void USART_SendData(USART_TypeDef* USARTx, uint16_t Data)
mbed_official 125:23cc3068a9e4 926 {
mbed_official 125:23cc3068a9e4 927 /* Check the parameters */
mbed_official 125:23cc3068a9e4 928 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 929 assert_param(IS_USART_DATA(Data));
mbed_official 125:23cc3068a9e4 930
mbed_official 125:23cc3068a9e4 931 /* Transmit Data */
mbed_official 125:23cc3068a9e4 932 USARTx->TDR = (Data & (uint16_t)0x01FF);
mbed_official 125:23cc3068a9e4 933 }
mbed_official 125:23cc3068a9e4 934
mbed_official 125:23cc3068a9e4 935 /**
mbed_official 125:23cc3068a9e4 936 * @brief Returns the most recent received data by the USARTx peripheral.
mbed_official 125:23cc3068a9e4 937 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 938 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 939 * @retval The received data.
mbed_official 125:23cc3068a9e4 940 */
mbed_official 125:23cc3068a9e4 941 uint16_t USART_ReceiveData(USART_TypeDef* USARTx)
mbed_official 125:23cc3068a9e4 942 {
mbed_official 125:23cc3068a9e4 943 /* Check the parameters */
mbed_official 125:23cc3068a9e4 944 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 945
mbed_official 125:23cc3068a9e4 946 /* Receive Data */
mbed_official 125:23cc3068a9e4 947 return (uint16_t)(USARTx->RDR & (uint16_t)0x01FF);
mbed_official 125:23cc3068a9e4 948 }
mbed_official 125:23cc3068a9e4 949
mbed_official 125:23cc3068a9e4 950 /**
mbed_official 125:23cc3068a9e4 951 * @}
mbed_official 125:23cc3068a9e4 952 */
mbed_official 125:23cc3068a9e4 953
mbed_official 125:23cc3068a9e4 954 /** @defgroup USART_Group5 MultiProcessor Communication functions
mbed_official 125:23cc3068a9e4 955 * @brief Multi-Processor Communication functions
mbed_official 125:23cc3068a9e4 956 *
mbed_official 125:23cc3068a9e4 957 @verbatim
mbed_official 125:23cc3068a9e4 958 ===============================================================================
mbed_official 125:23cc3068a9e4 959 ##### Multi-Processor Communication functions #####
mbed_official 125:23cc3068a9e4 960 ===============================================================================
mbed_official 125:23cc3068a9e4 961 [..] This subsection provides a set of functions allowing to manage the USART
mbed_official 125:23cc3068a9e4 962 multiprocessor communication.
mbed_official 125:23cc3068a9e4 963 [..] For instance one of the USARTs can be the master, its TX output is
mbed_official 125:23cc3068a9e4 964 connected to the RX input of the other USART. The others are slaves,
mbed_official 125:23cc3068a9e4 965 their respective TX outputs are logically ANDed together and connected
mbed_official 125:23cc3068a9e4 966 to the RX input of the master. USART multiprocessor communication is
mbed_official 125:23cc3068a9e4 967 possible through the following procedure:
mbed_official 125:23cc3068a9e4 968 (#) Program the Baud rate, Word length = 9 bits, Stop bits, Parity,
mbed_official 125:23cc3068a9e4 969 Mode transmitter or Mode receiver and hardware flow control values
mbed_official 125:23cc3068a9e4 970 using the USART_Init() function.
mbed_official 125:23cc3068a9e4 971 (#) Configures the USART address using the USART_SetAddress() function.
mbed_official 125:23cc3068a9e4 972 (#) Configures the wake up methode (USART_WakeUp_IdleLine or
mbed_official 125:23cc3068a9e4 973 USART_WakeUp_AddressMark) using USART_WakeUpConfig() function only
mbed_official 125:23cc3068a9e4 974 for the slaves.
mbed_official 125:23cc3068a9e4 975 (#) Enable the USART using the USART_Cmd() function.
mbed_official 125:23cc3068a9e4 976 (#) Enter the USART slaves in mute mode using USART_ReceiverWakeUpCmd()
mbed_official 125:23cc3068a9e4 977 function.
mbed_official 125:23cc3068a9e4 978 [..] The USART Slave exit from mute mode when receive the wake up condition.
mbed_official 125:23cc3068a9e4 979
mbed_official 125:23cc3068a9e4 980 @endverbatim
mbed_official 125:23cc3068a9e4 981 * @{
mbed_official 125:23cc3068a9e4 982 */
mbed_official 125:23cc3068a9e4 983
mbed_official 125:23cc3068a9e4 984 /**
mbed_official 125:23cc3068a9e4 985 * @brief Sets the address of the USART node.
mbed_official 125:23cc3068a9e4 986 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 987 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 988 * @param USART_Address: Indicates the address of the USART node.
mbed_official 125:23cc3068a9e4 989 * @retval None
mbed_official 125:23cc3068a9e4 990 */
mbed_official 125:23cc3068a9e4 991 void USART_SetAddress(USART_TypeDef* USARTx, uint8_t USART_Address)
mbed_official 125:23cc3068a9e4 992 {
mbed_official 125:23cc3068a9e4 993 /* Check the parameters */
mbed_official 125:23cc3068a9e4 994 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 995
mbed_official 125:23cc3068a9e4 996 /* Clear the USART address */
mbed_official 125:23cc3068a9e4 997 USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_ADD);
mbed_official 125:23cc3068a9e4 998 /* Set the USART address node */
mbed_official 125:23cc3068a9e4 999 USARTx->CR2 |=((uint32_t)USART_Address << (uint32_t)0x18);
mbed_official 125:23cc3068a9e4 1000 }
mbed_official 125:23cc3068a9e4 1001
mbed_official 125:23cc3068a9e4 1002 /**
mbed_official 125:23cc3068a9e4 1003 * @brief Enables or disables the USART's mute mode.
mbed_official 125:23cc3068a9e4 1004 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 1005 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 1006 * @param NewState: new state of the USART mute mode.
mbed_official 125:23cc3068a9e4 1007 * This parameter can be: ENABLE or DISABLE.
mbed_official 125:23cc3068a9e4 1008 * @retval None
mbed_official 125:23cc3068a9e4 1009 */
mbed_official 125:23cc3068a9e4 1010 void USART_MuteModeCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 125:23cc3068a9e4 1011 {
mbed_official 125:23cc3068a9e4 1012 /* Check the parameters */
mbed_official 125:23cc3068a9e4 1013 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 1014 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 125:23cc3068a9e4 1015
mbed_official 125:23cc3068a9e4 1016 if (NewState != DISABLE)
mbed_official 125:23cc3068a9e4 1017 {
mbed_official 125:23cc3068a9e4 1018 /* Enable the USART mute mode by setting the MME bit in the CR1 register */
mbed_official 125:23cc3068a9e4 1019 USARTx->CR1 |= USART_CR1_MME;
mbed_official 125:23cc3068a9e4 1020 }
mbed_official 125:23cc3068a9e4 1021 else
mbed_official 125:23cc3068a9e4 1022 {
mbed_official 125:23cc3068a9e4 1023 /* Disable the USART mute mode by clearing the MME bit in the CR1 register */
mbed_official 125:23cc3068a9e4 1024 USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_MME);
mbed_official 125:23cc3068a9e4 1025 }
mbed_official 125:23cc3068a9e4 1026 }
mbed_official 125:23cc3068a9e4 1027
mbed_official 125:23cc3068a9e4 1028 /**
mbed_official 125:23cc3068a9e4 1029 * @brief Selects the USART WakeUp method from mute mode.
mbed_official 125:23cc3068a9e4 1030 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 1031 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 1032 * @param USART_WakeUp: specifies the USART wakeup method.
mbed_official 125:23cc3068a9e4 1033 * This parameter can be one of the following values:
mbed_official 125:23cc3068a9e4 1034 * @arg USART_WakeUp_IdleLine: WakeUp by an idle line detection
mbed_official 125:23cc3068a9e4 1035 * @arg USART_WakeUp_AddressMark: WakeUp by an address mark
mbed_official 125:23cc3068a9e4 1036 * @retval None
mbed_official 125:23cc3068a9e4 1037 */
mbed_official 125:23cc3068a9e4 1038 void USART_MuteModeWakeUpConfig(USART_TypeDef* USARTx, uint32_t USART_WakeUp)
mbed_official 125:23cc3068a9e4 1039 {
mbed_official 125:23cc3068a9e4 1040 /* Check the parameters */
mbed_official 125:23cc3068a9e4 1041 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 1042 assert_param(IS_USART_MUTEMODE_WAKEUP(USART_WakeUp));
mbed_official 125:23cc3068a9e4 1043
mbed_official 125:23cc3068a9e4 1044 USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_WAKE);
mbed_official 125:23cc3068a9e4 1045 USARTx->CR1 |= USART_WakeUp;
mbed_official 125:23cc3068a9e4 1046 }
mbed_official 125:23cc3068a9e4 1047
mbed_official 125:23cc3068a9e4 1048 /**
mbed_official 125:23cc3068a9e4 1049 * @brief Configure the the USART Address detection length.
mbed_official 125:23cc3068a9e4 1050 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 1051 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 1052 * @param USART_AddressLength: specifies the USART address length detection.
mbed_official 125:23cc3068a9e4 1053 * This parameter can be one of the following values:
mbed_official 125:23cc3068a9e4 1054 * @arg USART_AddressLength_4b: 4-bit address length detection
mbed_official 125:23cc3068a9e4 1055 * @arg USART_AddressLength_7b: 7-bit address length detection
mbed_official 125:23cc3068a9e4 1056 * @retval None
mbed_official 125:23cc3068a9e4 1057 */
mbed_official 125:23cc3068a9e4 1058 void USART_AddressDetectionConfig(USART_TypeDef* USARTx, uint32_t USART_AddressLength)
mbed_official 125:23cc3068a9e4 1059 {
mbed_official 125:23cc3068a9e4 1060 /* Check the parameters */
mbed_official 125:23cc3068a9e4 1061 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 1062 assert_param(IS_USART_ADDRESS_DETECTION(USART_AddressLength));
mbed_official 125:23cc3068a9e4 1063
mbed_official 125:23cc3068a9e4 1064 USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_ADDM7);
mbed_official 125:23cc3068a9e4 1065 USARTx->CR2 |= USART_AddressLength;
mbed_official 125:23cc3068a9e4 1066 }
mbed_official 125:23cc3068a9e4 1067
mbed_official 125:23cc3068a9e4 1068 /**
mbed_official 125:23cc3068a9e4 1069 * @}
mbed_official 125:23cc3068a9e4 1070 */
mbed_official 125:23cc3068a9e4 1071
mbed_official 125:23cc3068a9e4 1072 /** @defgroup USART_Group6 LIN mode functions
mbed_official 125:23cc3068a9e4 1073 * @brief LIN mode functions
mbed_official 125:23cc3068a9e4 1074 *
mbed_official 125:23cc3068a9e4 1075 @verbatim
mbed_official 125:23cc3068a9e4 1076 ===============================================================================
mbed_official 125:23cc3068a9e4 1077 ##### LIN mode functions #####
mbed_official 125:23cc3068a9e4 1078 ===============================================================================
mbed_official 125:23cc3068a9e4 1079 [..] This subsection provides a set of functions allowing to manage the USART
mbed_official 125:23cc3068a9e4 1080 LIN Mode communication.
mbed_official 125:23cc3068a9e4 1081 [..] In LIN mode, 8-bit data format with 1 stop bit is required in accordance
mbed_official 125:23cc3068a9e4 1082 with the LIN standard.
mbed_official 125:23cc3068a9e4 1083 [..] Only this LIN Feature is supported by the USART IP:
mbed_official 125:23cc3068a9e4 1084 (+) LIN Master Synchronous Break send capability and LIN slave break
mbed_official 125:23cc3068a9e4 1085 detection capability : 13-bit break generation and 10/11 bit break
mbed_official 125:23cc3068a9e4 1086 detection.
mbed_official 125:23cc3068a9e4 1087 [..] USART LIN Master transmitter communication is possible through the
mbed_official 125:23cc3068a9e4 1088 following procedure:
mbed_official 125:23cc3068a9e4 1089 (#) Program the Baud rate, Word length = 8bits, Stop bits = 1bit, Parity,
mbed_official 125:23cc3068a9e4 1090 Mode transmitter or Mode receiver and hardware flow control values
mbed_official 125:23cc3068a9e4 1091 using the USART_Init() function.
mbed_official 125:23cc3068a9e4 1092 (#) Enable the LIN mode using the USART_LINCmd() function.
mbed_official 125:23cc3068a9e4 1093 (#) Enable the USART using the USART_Cmd() function.
mbed_official 125:23cc3068a9e4 1094 (#) Send the break character using USART_SendBreak() function.
mbed_official 125:23cc3068a9e4 1095 [..] USART LIN Master receiver communication is possible through the
mbed_official 125:23cc3068a9e4 1096 following procedure:
mbed_official 125:23cc3068a9e4 1097 (#) Program the Baud rate, Word length = 8bits, Stop bits = 1bit, Parity,
mbed_official 125:23cc3068a9e4 1098 Mode transmitter or Mode receiver and hardware flow control values
mbed_official 125:23cc3068a9e4 1099 using the USART_Init() function.
mbed_official 125:23cc3068a9e4 1100 (#) Configures the break detection length
mbed_official 125:23cc3068a9e4 1101 using the USART_LINBreakDetectLengthConfig() function.
mbed_official 125:23cc3068a9e4 1102 (#) Enable the LIN mode using the USART_LINCmd() function.
mbed_official 125:23cc3068a9e4 1103 (#) Enable the USART using the USART_Cmd() function.
mbed_official 125:23cc3068a9e4 1104 [..]
mbed_official 125:23cc3068a9e4 1105 (@) In LIN mode, the following bits must be kept cleared:
mbed_official 125:23cc3068a9e4 1106 (+@) CLKEN in the USART_CR2 register.
mbed_official 125:23cc3068a9e4 1107 (+@) STOP[1:0], SCEN, HDSEL and IREN in the USART_CR3 register.
mbed_official 125:23cc3068a9e4 1108
mbed_official 125:23cc3068a9e4 1109 @endverbatim
mbed_official 125:23cc3068a9e4 1110 * @{
mbed_official 125:23cc3068a9e4 1111 */
mbed_official 125:23cc3068a9e4 1112
mbed_official 125:23cc3068a9e4 1113 /**
mbed_official 125:23cc3068a9e4 1114 * @brief Sets the USART LIN Break detection length.
mbed_official 125:23cc3068a9e4 1115 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 1116 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 1117 * @param USART_LINBreakDetectLength: specifies the LIN break detection length.
mbed_official 125:23cc3068a9e4 1118 * This parameter can be one of the following values:
mbed_official 125:23cc3068a9e4 1119 * @arg USART_LINBreakDetectLength_10b: 10-bit break detection
mbed_official 125:23cc3068a9e4 1120 * @arg USART_LINBreakDetectLength_11b: 11-bit break detection
mbed_official 125:23cc3068a9e4 1121 * @retval None
mbed_official 125:23cc3068a9e4 1122 */
mbed_official 125:23cc3068a9e4 1123 void USART_LINBreakDetectLengthConfig(USART_TypeDef* USARTx, uint32_t USART_LINBreakDetectLength)
mbed_official 125:23cc3068a9e4 1124 {
mbed_official 125:23cc3068a9e4 1125 /* Check the parameters */
mbed_official 125:23cc3068a9e4 1126 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 1127 assert_param(IS_USART_LIN_BREAK_DETECT_LENGTH(USART_LINBreakDetectLength));
mbed_official 125:23cc3068a9e4 1128
mbed_official 125:23cc3068a9e4 1129 USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_LBDL);
mbed_official 125:23cc3068a9e4 1130 USARTx->CR2 |= USART_LINBreakDetectLength;
mbed_official 125:23cc3068a9e4 1131 }
mbed_official 125:23cc3068a9e4 1132
mbed_official 125:23cc3068a9e4 1133 /**
mbed_official 125:23cc3068a9e4 1134 * @brief Enables or disables the USART's LIN mode.
mbed_official 125:23cc3068a9e4 1135 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 1136 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 1137 * @param NewState: new state of the USART LIN mode.
mbed_official 125:23cc3068a9e4 1138 * This parameter can be: ENABLE or DISABLE.
mbed_official 125:23cc3068a9e4 1139 * @retval None
mbed_official 125:23cc3068a9e4 1140 */
mbed_official 125:23cc3068a9e4 1141 void USART_LINCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 125:23cc3068a9e4 1142 {
mbed_official 125:23cc3068a9e4 1143 /* Check the parameters */
mbed_official 125:23cc3068a9e4 1144 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 1145 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 125:23cc3068a9e4 1146
mbed_official 125:23cc3068a9e4 1147 if (NewState != DISABLE)
mbed_official 125:23cc3068a9e4 1148 {
mbed_official 125:23cc3068a9e4 1149 /* Enable the LIN mode by setting the LINEN bit in the CR2 register */
mbed_official 125:23cc3068a9e4 1150 USARTx->CR2 |= USART_CR2_LINEN;
mbed_official 125:23cc3068a9e4 1151 }
mbed_official 125:23cc3068a9e4 1152 else
mbed_official 125:23cc3068a9e4 1153 {
mbed_official 125:23cc3068a9e4 1154 /* Disable the LIN mode by clearing the LINEN bit in the CR2 register */
mbed_official 125:23cc3068a9e4 1155 USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_LINEN);
mbed_official 125:23cc3068a9e4 1156 }
mbed_official 125:23cc3068a9e4 1157 }
mbed_official 125:23cc3068a9e4 1158
mbed_official 125:23cc3068a9e4 1159 /**
mbed_official 125:23cc3068a9e4 1160 * @}
mbed_official 125:23cc3068a9e4 1161 */
mbed_official 125:23cc3068a9e4 1162
mbed_official 125:23cc3068a9e4 1163 /** @defgroup USART_Group7 Halfduplex mode function
mbed_official 125:23cc3068a9e4 1164 * @brief Half-duplex mode function
mbed_official 125:23cc3068a9e4 1165 *
mbed_official 125:23cc3068a9e4 1166 @verbatim
mbed_official 125:23cc3068a9e4 1167 ===============================================================================
mbed_official 125:23cc3068a9e4 1168 ##### Half-duplex mode function #####
mbed_official 125:23cc3068a9e4 1169 ===============================================================================
mbed_official 125:23cc3068a9e4 1170 [..] This subsection provides a set of functions allowing to manage the USART
mbed_official 125:23cc3068a9e4 1171 Half-duplex communication.
mbed_official 125:23cc3068a9e4 1172 [..] The USART can be configured to follow a single-wire half-duplex protocol
mbed_official 125:23cc3068a9e4 1173 where the TX and RX lines are internally connected.
mbed_official 125:23cc3068a9e4 1174 [..] USART Half duplex communication is possible through the following procedure:
mbed_official 125:23cc3068a9e4 1175 (#) Program the Baud rate, Word length, Stop bits, Parity, Mode transmitter
mbed_official 125:23cc3068a9e4 1176 or Mode receiver and hardware flow control values using the USART_Init()
mbed_official 125:23cc3068a9e4 1177 function.
mbed_official 125:23cc3068a9e4 1178 (#) Configures the USART address using the USART_SetAddress() function.
mbed_official 125:23cc3068a9e4 1179 (#) Enable the half duplex mode using USART_HalfDuplexCmd() function.
mbed_official 125:23cc3068a9e4 1180 (#) Enable the USART using the USART_Cmd() function.
mbed_official 125:23cc3068a9e4 1181 [..]
mbed_official 125:23cc3068a9e4 1182 (@) The RX pin is no longer used.
mbed_official 125:23cc3068a9e4 1183 (@) In Half-duplex mode the following bits must be kept cleared:
mbed_official 125:23cc3068a9e4 1184 (+@) LINEN and CLKEN bits in the USART_CR2 register.
mbed_official 125:23cc3068a9e4 1185 (+@) SCEN and IREN bits in the USART_CR3 register.
mbed_official 125:23cc3068a9e4 1186
mbed_official 125:23cc3068a9e4 1187 @endverbatim
mbed_official 125:23cc3068a9e4 1188 * @{
mbed_official 125:23cc3068a9e4 1189 */
mbed_official 125:23cc3068a9e4 1190
mbed_official 125:23cc3068a9e4 1191 /**
mbed_official 125:23cc3068a9e4 1192 * @brief Enables or disables the USART's Half Duplex communication.
mbed_official 125:23cc3068a9e4 1193 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 1194 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 1195 * @param NewState: new state of the USART Communication.
mbed_official 125:23cc3068a9e4 1196 * This parameter can be: ENABLE or DISABLE.
mbed_official 125:23cc3068a9e4 1197 * @retval None
mbed_official 125:23cc3068a9e4 1198 */
mbed_official 125:23cc3068a9e4 1199 void USART_HalfDuplexCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 125:23cc3068a9e4 1200 {
mbed_official 125:23cc3068a9e4 1201 /* Check the parameters */
mbed_official 125:23cc3068a9e4 1202 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 1203 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 125:23cc3068a9e4 1204
mbed_official 125:23cc3068a9e4 1205 if (NewState != DISABLE)
mbed_official 125:23cc3068a9e4 1206 {
mbed_official 125:23cc3068a9e4 1207 /* Enable the Half-Duplex mode by setting the HDSEL bit in the CR3 register */
mbed_official 125:23cc3068a9e4 1208 USARTx->CR3 |= USART_CR3_HDSEL;
mbed_official 125:23cc3068a9e4 1209 }
mbed_official 125:23cc3068a9e4 1210 else
mbed_official 125:23cc3068a9e4 1211 {
mbed_official 125:23cc3068a9e4 1212 /* Disable the Half-Duplex mode by clearing the HDSEL bit in the CR3 register */
mbed_official 125:23cc3068a9e4 1213 USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_HDSEL);
mbed_official 125:23cc3068a9e4 1214 }
mbed_official 125:23cc3068a9e4 1215 }
mbed_official 125:23cc3068a9e4 1216
mbed_official 125:23cc3068a9e4 1217 /**
mbed_official 125:23cc3068a9e4 1218 * @}
mbed_official 125:23cc3068a9e4 1219 */
mbed_official 125:23cc3068a9e4 1220
mbed_official 125:23cc3068a9e4 1221
mbed_official 125:23cc3068a9e4 1222 /** @defgroup USART_Group8 Smartcard mode functions
mbed_official 125:23cc3068a9e4 1223 * @brief Smartcard mode functions
mbed_official 125:23cc3068a9e4 1224 *
mbed_official 125:23cc3068a9e4 1225 @verbatim
mbed_official 125:23cc3068a9e4 1226 ===============================================================================
mbed_official 125:23cc3068a9e4 1227 ##### Smartcard mode functions #####
mbed_official 125:23cc3068a9e4 1228 ===============================================================================
mbed_official 125:23cc3068a9e4 1229 [..] This subsection provides a set of functions allowing to manage the USART
mbed_official 125:23cc3068a9e4 1230 Smartcard communication.
mbed_official 125:23cc3068a9e4 1231 [..] The Smartcard interface is designed to support asynchronous protocol
mbed_official 125:23cc3068a9e4 1232 Smartcards as defined in the ISO 7816-3 standard. The USART can provide
mbed_official 125:23cc3068a9e4 1233 a clock to the smartcard through the SCLK output. In smartcard mode,
mbed_official 125:23cc3068a9e4 1234 SCLK is not associated to the communication but is simply derived from
mbed_official 125:23cc3068a9e4 1235 the internal peripheral input clock through a 5-bit prescaler.
mbed_official 125:23cc3068a9e4 1236 [..] Smartcard communication is possible through the following procedure:
mbed_official 125:23cc3068a9e4 1237 (#) Configures the Smartcard Prsecaler using the USART_SetPrescaler()
mbed_official 125:23cc3068a9e4 1238 function.
mbed_official 125:23cc3068a9e4 1239 (#) Configures the Smartcard Guard Time using the USART_SetGuardTime()
mbed_official 125:23cc3068a9e4 1240 function.
mbed_official 125:23cc3068a9e4 1241 (#) Program the USART clock using the USART_ClockInit() function as following:
mbed_official 125:23cc3068a9e4 1242 (++) USART Clock enabled.
mbed_official 125:23cc3068a9e4 1243 (++) USART CPOL Low.
mbed_official 125:23cc3068a9e4 1244 (++) USART CPHA on first edge.
mbed_official 125:23cc3068a9e4 1245 (++) USART Last Bit Clock Enabled.
mbed_official 125:23cc3068a9e4 1246 (#) Program the Smartcard interface using the USART_Init() function as
mbed_official 125:23cc3068a9e4 1247 following:
mbed_official 125:23cc3068a9e4 1248 (++) Word Length = 9 Bits.
mbed_official 125:23cc3068a9e4 1249 (++) 1.5 Stop Bit.
mbed_official 125:23cc3068a9e4 1250 (++) Even parity.
mbed_official 125:23cc3068a9e4 1251 (++) BaudRate = 12096 baud.
mbed_official 125:23cc3068a9e4 1252 (++) Hardware flow control disabled (RTS and CTS signals).
mbed_official 125:23cc3068a9e4 1253 (++) Tx and Rx enabled
mbed_official 125:23cc3068a9e4 1254 (#) Optionally you can enable the parity error interrupt using
mbed_official 125:23cc3068a9e4 1255 the USART_ITConfig() function.
mbed_official 125:23cc3068a9e4 1256 (#) Enable the Smartcard NACK using the USART_SmartCardNACKCmd() function.
mbed_official 125:23cc3068a9e4 1257 (#) Enable the Smartcard interface using the USART_SmartCardCmd() function.
mbed_official 125:23cc3068a9e4 1258 (#) Enable the USART using the USART_Cmd() function.
mbed_official 125:23cc3068a9e4 1259 [..]
mbed_official 125:23cc3068a9e4 1260 Please refer to the ISO 7816-3 specification for more details.
mbed_official 125:23cc3068a9e4 1261 [..]
mbed_official 125:23cc3068a9e4 1262 (@) It is also possible to choose 0.5 stop bit for receiving but it is
mbed_official 125:23cc3068a9e4 1263 recommended to use 1.5 stop bits for both transmitting and receiving
mbed_official 125:23cc3068a9e4 1264 to avoid switching between the two configurations.
mbed_official 125:23cc3068a9e4 1265 (@) In smartcard mode, the following bits must be kept cleared:
mbed_official 125:23cc3068a9e4 1266 (+@) LINEN bit in the USART_CR2 register.
mbed_official 125:23cc3068a9e4 1267 (+@) HDSEL and IREN bits in the USART_CR3 register.
mbed_official 125:23cc3068a9e4 1268
mbed_official 125:23cc3068a9e4 1269 @endverbatim
mbed_official 125:23cc3068a9e4 1270 * @{
mbed_official 125:23cc3068a9e4 1271 */
mbed_official 125:23cc3068a9e4 1272
mbed_official 125:23cc3068a9e4 1273 /**
mbed_official 125:23cc3068a9e4 1274 * @brief Sets the specified USART guard time.
mbed_official 125:23cc3068a9e4 1275 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 1276 * following values: USART1 or USART2 or USART3.
mbed_official 125:23cc3068a9e4 1277 * @param USART_GuardTime: specifies the guard time.
mbed_official 125:23cc3068a9e4 1278 * @retval None
mbed_official 125:23cc3068a9e4 1279 */
mbed_official 125:23cc3068a9e4 1280 void USART_SetGuardTime(USART_TypeDef* USARTx, uint8_t USART_GuardTime)
mbed_official 125:23cc3068a9e4 1281 {
mbed_official 125:23cc3068a9e4 1282 /* Check the parameters */
mbed_official 125:23cc3068a9e4 1283 assert_param(IS_USART_123_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 1284
mbed_official 125:23cc3068a9e4 1285 /* Clear the USART Guard time */
mbed_official 125:23cc3068a9e4 1286 USARTx->GTPR &= USART_GTPR_PSC;
mbed_official 125:23cc3068a9e4 1287 /* Set the USART guard time */
mbed_official 125:23cc3068a9e4 1288 USARTx->GTPR |= (uint16_t)((uint16_t)USART_GuardTime << 0x08);
mbed_official 125:23cc3068a9e4 1289 }
mbed_official 125:23cc3068a9e4 1290
mbed_official 125:23cc3068a9e4 1291 /**
mbed_official 125:23cc3068a9e4 1292 * @brief Enables or disables the USART's Smart Card mode.
mbed_official 125:23cc3068a9e4 1293 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 1294 * following values: USART1 or USART2 or USART3.
mbed_official 125:23cc3068a9e4 1295 * @param NewState: new state of the Smart Card mode.
mbed_official 125:23cc3068a9e4 1296 * This parameter can be: ENABLE or DISABLE.
mbed_official 125:23cc3068a9e4 1297 * @retval None
mbed_official 125:23cc3068a9e4 1298 */
mbed_official 125:23cc3068a9e4 1299 void USART_SmartCardCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 125:23cc3068a9e4 1300 {
mbed_official 125:23cc3068a9e4 1301 /* Check the parameters */
mbed_official 125:23cc3068a9e4 1302 assert_param(IS_USART_123_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 1303 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 125:23cc3068a9e4 1304 if (NewState != DISABLE)
mbed_official 125:23cc3068a9e4 1305 {
mbed_official 125:23cc3068a9e4 1306 /* Enable the SC mode by setting the SCEN bit in the CR3 register */
mbed_official 125:23cc3068a9e4 1307 USARTx->CR3 |= USART_CR3_SCEN;
mbed_official 125:23cc3068a9e4 1308 }
mbed_official 125:23cc3068a9e4 1309 else
mbed_official 125:23cc3068a9e4 1310 {
mbed_official 125:23cc3068a9e4 1311 /* Disable the SC mode by clearing the SCEN bit in the CR3 register */
mbed_official 125:23cc3068a9e4 1312 USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_SCEN);
mbed_official 125:23cc3068a9e4 1313 }
mbed_official 125:23cc3068a9e4 1314 }
mbed_official 125:23cc3068a9e4 1315
mbed_official 125:23cc3068a9e4 1316 /**
mbed_official 125:23cc3068a9e4 1317 * @brief Enables or disables NACK transmission.
mbed_official 125:23cc3068a9e4 1318 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 1319 * following values: USART1 or USART2 or USART3.
mbed_official 125:23cc3068a9e4 1320 * @param NewState: new state of the NACK transmission.
mbed_official 125:23cc3068a9e4 1321 * This parameter can be: ENABLE or DISABLE.
mbed_official 125:23cc3068a9e4 1322 * @retval None
mbed_official 125:23cc3068a9e4 1323 */
mbed_official 125:23cc3068a9e4 1324 void USART_SmartCardNACKCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 125:23cc3068a9e4 1325 {
mbed_official 125:23cc3068a9e4 1326 /* Check the parameters */
mbed_official 125:23cc3068a9e4 1327 assert_param(IS_USART_123_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 1328 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 125:23cc3068a9e4 1329 if (NewState != DISABLE)
mbed_official 125:23cc3068a9e4 1330 {
mbed_official 125:23cc3068a9e4 1331 /* Enable the NACK transmission by setting the NACK bit in the CR3 register */
mbed_official 125:23cc3068a9e4 1332 USARTx->CR3 |= USART_CR3_NACK;
mbed_official 125:23cc3068a9e4 1333 }
mbed_official 125:23cc3068a9e4 1334 else
mbed_official 125:23cc3068a9e4 1335 {
mbed_official 125:23cc3068a9e4 1336 /* Disable the NACK transmission by clearing the NACK bit in the CR3 register */
mbed_official 125:23cc3068a9e4 1337 USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_NACK);
mbed_official 125:23cc3068a9e4 1338 }
mbed_official 125:23cc3068a9e4 1339 }
mbed_official 125:23cc3068a9e4 1340
mbed_official 125:23cc3068a9e4 1341 /**
mbed_official 125:23cc3068a9e4 1342 * @brief Sets the Smart Card number of retries in transmit and receive.
mbed_official 125:23cc3068a9e4 1343 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 1344 * following values: USART1 or USART2 or USART3.
mbed_official 125:23cc3068a9e4 1345 * @param USART_AutoCount: specifies the Smart Card auto retry count.
mbed_official 125:23cc3068a9e4 1346 * @retval None
mbed_official 125:23cc3068a9e4 1347 */
mbed_official 125:23cc3068a9e4 1348 void USART_SetAutoRetryCount(USART_TypeDef* USARTx, uint8_t USART_AutoCount)
mbed_official 125:23cc3068a9e4 1349 {
mbed_official 125:23cc3068a9e4 1350 /* Check the parameters */
mbed_official 125:23cc3068a9e4 1351 assert_param(IS_USART_123_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 1352 assert_param(IS_USART_AUTO_RETRY_COUNTER(USART_AutoCount));
mbed_official 125:23cc3068a9e4 1353 /* Clear the USART auto retry count */
mbed_official 125:23cc3068a9e4 1354 USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_SCARCNT);
mbed_official 125:23cc3068a9e4 1355 /* Set the USART auto retry count*/
mbed_official 125:23cc3068a9e4 1356 USARTx->CR3 |= (uint32_t)((uint32_t)USART_AutoCount << 0x11);
mbed_official 125:23cc3068a9e4 1357 }
mbed_official 125:23cc3068a9e4 1358
mbed_official 125:23cc3068a9e4 1359 /**
mbed_official 125:23cc3068a9e4 1360 * @brief Sets the Smart Card Block length.
mbed_official 125:23cc3068a9e4 1361 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 1362 * following values: USART1 or USART2 or USART3.
mbed_official 125:23cc3068a9e4 1363 * @param USART_BlockLength: specifies the Smart Card block length.
mbed_official 125:23cc3068a9e4 1364 * @retval None
mbed_official 125:23cc3068a9e4 1365 */
mbed_official 125:23cc3068a9e4 1366 void USART_SetBlockLength(USART_TypeDef* USARTx, uint8_t USART_BlockLength)
mbed_official 125:23cc3068a9e4 1367 {
mbed_official 125:23cc3068a9e4 1368 /* Check the parameters */
mbed_official 125:23cc3068a9e4 1369 assert_param(IS_USART_123_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 1370
mbed_official 125:23cc3068a9e4 1371 /* Clear the Smart card block length */
mbed_official 125:23cc3068a9e4 1372 USARTx->RTOR &= (uint32_t)~((uint32_t)USART_RTOR_BLEN);
mbed_official 125:23cc3068a9e4 1373 /* Set the Smart Card block length */
mbed_official 125:23cc3068a9e4 1374 USARTx->RTOR |= (uint32_t)((uint32_t)USART_BlockLength << 0x18);
mbed_official 125:23cc3068a9e4 1375 }
mbed_official 125:23cc3068a9e4 1376
mbed_official 125:23cc3068a9e4 1377 /**
mbed_official 125:23cc3068a9e4 1378 * @}
mbed_official 125:23cc3068a9e4 1379 */
mbed_official 125:23cc3068a9e4 1380
mbed_official 125:23cc3068a9e4 1381 /** @defgroup USART_Group9 IrDA mode functions
mbed_official 125:23cc3068a9e4 1382 * @brief IrDA mode functions
mbed_official 125:23cc3068a9e4 1383 *
mbed_official 125:23cc3068a9e4 1384 @verbatim
mbed_official 125:23cc3068a9e4 1385 ===============================================================================
mbed_official 125:23cc3068a9e4 1386 ##### IrDA mode functions #####
mbed_official 125:23cc3068a9e4 1387 ===============================================================================
mbed_official 125:23cc3068a9e4 1388 [..] This subsection provides a set of functions allowing to manage the USART
mbed_official 125:23cc3068a9e4 1389 IrDA communication.
mbed_official 125:23cc3068a9e4 1390 [..] IrDA is a half duplex communication protocol. If the Transmitter is busy,
mbed_official 125:23cc3068a9e4 1391 any data on the IrDA receive line will be ignored by the IrDA decoder
mbed_official 125:23cc3068a9e4 1392 and if the Receiver is busy, data on the TX from the USART to IrDA will
mbed_official 125:23cc3068a9e4 1393 not be encoded by IrDA. While receiving data, transmission should be
mbed_official 125:23cc3068a9e4 1394 avoided as the data to be transmitted could be corrupted.
mbed_official 125:23cc3068a9e4 1395 [..] IrDA communication is possible through the following procedure:
mbed_official 125:23cc3068a9e4 1396 (#) Program the Baud rate, Word length = 8 bits, Stop bits, Parity,
mbed_official 125:23cc3068a9e4 1397 Transmitter/Receiver modes and hardware flow control values using
mbed_official 125:23cc3068a9e4 1398 the USART_Init() function.
mbed_official 125:23cc3068a9e4 1399 (#) Configures the IrDA pulse width by configuring the prescaler using
mbed_official 125:23cc3068a9e4 1400 the USART_SetPrescaler() function.
mbed_official 125:23cc3068a9e4 1401 (#) Configures the IrDA USART_IrDAMode_LowPower or USART_IrDAMode_Normal
mbed_official 125:23cc3068a9e4 1402 mode using the USART_IrDAConfig() function.
mbed_official 125:23cc3068a9e4 1403 (#) Enable the IrDA using the USART_IrDACmd() function.
mbed_official 125:23cc3068a9e4 1404 (#) Enable the USART using the USART_Cmd() function.
mbed_official 125:23cc3068a9e4 1405 [..]
mbed_official 125:23cc3068a9e4 1406 (@) A pulse of width less than two and greater than one PSC period(s) may or
mbed_official 125:23cc3068a9e4 1407 may not be rejected.
mbed_official 125:23cc3068a9e4 1408 (@) The receiver set up time should be managed by software. The IrDA physical
mbed_official 125:23cc3068a9e4 1409 layer specification specifies a minimum of 10 ms delay between
mbed_official 125:23cc3068a9e4 1410 transmission and reception (IrDA is a half duplex protocol).
mbed_official 125:23cc3068a9e4 1411 (@) In IrDA mode, the following bits must be kept cleared:
mbed_official 125:23cc3068a9e4 1412 (+@) LINEN, STOP and CLKEN bits in the USART_CR2 register.
mbed_official 125:23cc3068a9e4 1413 (+@) SCEN and HDSEL bits in the USART_CR3 register.
mbed_official 125:23cc3068a9e4 1414
mbed_official 125:23cc3068a9e4 1415 @endverbatim
mbed_official 125:23cc3068a9e4 1416 * @{
mbed_official 125:23cc3068a9e4 1417 */
mbed_official 125:23cc3068a9e4 1418
mbed_official 125:23cc3068a9e4 1419 /**
mbed_official 125:23cc3068a9e4 1420 * @brief Configures the USART's IrDA interface.
mbed_official 125:23cc3068a9e4 1421 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 1422 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 1423 * @param USART_IrDAMode: specifies the IrDA mode.
mbed_official 125:23cc3068a9e4 1424 * This parameter can be one of the following values:
mbed_official 125:23cc3068a9e4 1425 * @arg USART_IrDAMode_LowPower
mbed_official 125:23cc3068a9e4 1426 * @arg USART_IrDAMode_Normal
mbed_official 125:23cc3068a9e4 1427 * @retval None
mbed_official 125:23cc3068a9e4 1428 */
mbed_official 125:23cc3068a9e4 1429 void USART_IrDAConfig(USART_TypeDef* USARTx, uint32_t USART_IrDAMode)
mbed_official 125:23cc3068a9e4 1430 {
mbed_official 125:23cc3068a9e4 1431 /* Check the parameters */
mbed_official 125:23cc3068a9e4 1432 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 1433 assert_param(IS_USART_IRDA_MODE(USART_IrDAMode));
mbed_official 125:23cc3068a9e4 1434
mbed_official 125:23cc3068a9e4 1435 USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_IRLP);
mbed_official 125:23cc3068a9e4 1436 USARTx->CR3 |= USART_IrDAMode;
mbed_official 125:23cc3068a9e4 1437 }
mbed_official 125:23cc3068a9e4 1438
mbed_official 125:23cc3068a9e4 1439 /**
mbed_official 125:23cc3068a9e4 1440 * @brief Enables or disables the USART's IrDA interface.
mbed_official 125:23cc3068a9e4 1441 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 1442 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 1443 * @param NewState: new state of the IrDA mode.
mbed_official 125:23cc3068a9e4 1444 * This parameter can be: ENABLE or DISABLE.
mbed_official 125:23cc3068a9e4 1445 * @retval None
mbed_official 125:23cc3068a9e4 1446 */
mbed_official 125:23cc3068a9e4 1447 void USART_IrDACmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 125:23cc3068a9e4 1448 {
mbed_official 125:23cc3068a9e4 1449 /* Check the parameters */
mbed_official 125:23cc3068a9e4 1450 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 1451 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 125:23cc3068a9e4 1452
mbed_official 125:23cc3068a9e4 1453 if (NewState != DISABLE)
mbed_official 125:23cc3068a9e4 1454 {
mbed_official 125:23cc3068a9e4 1455 /* Enable the IrDA mode by setting the IREN bit in the CR3 register */
mbed_official 125:23cc3068a9e4 1456 USARTx->CR3 |= USART_CR3_IREN;
mbed_official 125:23cc3068a9e4 1457 }
mbed_official 125:23cc3068a9e4 1458 else
mbed_official 125:23cc3068a9e4 1459 {
mbed_official 125:23cc3068a9e4 1460 /* Disable the IrDA mode by clearing the IREN bit in the CR3 register */
mbed_official 125:23cc3068a9e4 1461 USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_IREN);
mbed_official 125:23cc3068a9e4 1462 }
mbed_official 125:23cc3068a9e4 1463 }
mbed_official 125:23cc3068a9e4 1464 /**
mbed_official 125:23cc3068a9e4 1465 * @}
mbed_official 125:23cc3068a9e4 1466 */
mbed_official 125:23cc3068a9e4 1467
mbed_official 125:23cc3068a9e4 1468 /** @defgroup USART_Group10 RS485 mode function
mbed_official 125:23cc3068a9e4 1469 * @brief RS485 mode function
mbed_official 125:23cc3068a9e4 1470 *
mbed_official 125:23cc3068a9e4 1471 @verbatim
mbed_official 125:23cc3068a9e4 1472 ===============================================================================
mbed_official 125:23cc3068a9e4 1473 ##### RS485 mode functions #####
mbed_official 125:23cc3068a9e4 1474 ===============================================================================
mbed_official 125:23cc3068a9e4 1475 [..] This subsection provides a set of functions allowing to manage the USART
mbed_official 125:23cc3068a9e4 1476 RS485 flow control.
mbed_official 125:23cc3068a9e4 1477 [..] RS485 flow control (Driver enable feature) handling is possible through
mbed_official 125:23cc3068a9e4 1478 the following procedure:
mbed_official 125:23cc3068a9e4 1479 (#) Program the Baud rate, Word length = 8 bits, Stop bits, Parity,
mbed_official 125:23cc3068a9e4 1480 Transmitter/Receiver modes and hardware flow control values using
mbed_official 125:23cc3068a9e4 1481 the USART_Init() function.
mbed_official 125:23cc3068a9e4 1482 (#) Enable the Driver Enable using the USART_DECmd() function.
mbed_official 125:23cc3068a9e4 1483 (#) Configures the Driver Enable polarity using the USART_DEPolarityConfig()
mbed_official 125:23cc3068a9e4 1484 function.
mbed_official 125:23cc3068a9e4 1485 (#) Configures the Driver Enable assertion time using USART_SetDEAssertionTime()
mbed_official 125:23cc3068a9e4 1486 function and deassertion time using the USART_SetDEDeassertionTime()
mbed_official 125:23cc3068a9e4 1487 function.
mbed_official 125:23cc3068a9e4 1488 (#) Enable the USART using the USART_Cmd() function.
mbed_official 125:23cc3068a9e4 1489 [..]
mbed_official 125:23cc3068a9e4 1490 (@) The assertion and dessertion times are expressed in sample time units (1/8 or
mbed_official 125:23cc3068a9e4 1491 1/16 bit time, depending on the oversampling rate).
mbed_official 125:23cc3068a9e4 1492
mbed_official 125:23cc3068a9e4 1493 @endverbatim
mbed_official 125:23cc3068a9e4 1494 * @{
mbed_official 125:23cc3068a9e4 1495 */
mbed_official 125:23cc3068a9e4 1496
mbed_official 125:23cc3068a9e4 1497 /**
mbed_official 125:23cc3068a9e4 1498 * @brief Enables or disables the USART's DE functionality.
mbed_official 125:23cc3068a9e4 1499 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 1500 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 1501 * @param NewState: new state of the driver enable mode.
mbed_official 125:23cc3068a9e4 1502 * This parameter can be: ENABLE or DISABLE.
mbed_official 125:23cc3068a9e4 1503 * @retval None
mbed_official 125:23cc3068a9e4 1504 */
mbed_official 125:23cc3068a9e4 1505 void USART_DECmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 125:23cc3068a9e4 1506 {
mbed_official 125:23cc3068a9e4 1507 /* Check the parameters */
mbed_official 125:23cc3068a9e4 1508 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 1509 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 125:23cc3068a9e4 1510 if (NewState != DISABLE)
mbed_official 125:23cc3068a9e4 1511 {
mbed_official 125:23cc3068a9e4 1512 /* Enable the DE functionality by setting the DEM bit in the CR3 register */
mbed_official 125:23cc3068a9e4 1513 USARTx->CR3 |= USART_CR3_DEM;
mbed_official 125:23cc3068a9e4 1514 }
mbed_official 125:23cc3068a9e4 1515 else
mbed_official 125:23cc3068a9e4 1516 {
mbed_official 125:23cc3068a9e4 1517 /* Disable the DE functionality by clearing the DEM bit in the CR3 register */
mbed_official 125:23cc3068a9e4 1518 USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_DEM);
mbed_official 125:23cc3068a9e4 1519 }
mbed_official 125:23cc3068a9e4 1520 }
mbed_official 125:23cc3068a9e4 1521
mbed_official 125:23cc3068a9e4 1522 /**
mbed_official 125:23cc3068a9e4 1523 * @brief Configures the USART's DE polarity
mbed_official 125:23cc3068a9e4 1524 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 1525 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 1526 * @param USART_DEPolarity: specifies the DE polarity.
mbed_official 125:23cc3068a9e4 1527 * This parameter can be one of the following values:
mbed_official 125:23cc3068a9e4 1528 * @arg USART_DEPolarity_Low
mbed_official 125:23cc3068a9e4 1529 * @arg USART_DEPolarity_High
mbed_official 125:23cc3068a9e4 1530 * @retval None
mbed_official 125:23cc3068a9e4 1531 */
mbed_official 125:23cc3068a9e4 1532 void USART_DEPolarityConfig(USART_TypeDef* USARTx, uint32_t USART_DEPolarity)
mbed_official 125:23cc3068a9e4 1533 {
mbed_official 125:23cc3068a9e4 1534 /* Check the parameters */
mbed_official 125:23cc3068a9e4 1535 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 1536 assert_param(IS_USART_DE_POLARITY(USART_DEPolarity));
mbed_official 125:23cc3068a9e4 1537
mbed_official 125:23cc3068a9e4 1538 USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_DEP);
mbed_official 125:23cc3068a9e4 1539 USARTx->CR3 |= USART_DEPolarity;
mbed_official 125:23cc3068a9e4 1540 }
mbed_official 125:23cc3068a9e4 1541
mbed_official 125:23cc3068a9e4 1542 /**
mbed_official 125:23cc3068a9e4 1543 * @brief Sets the specified RS485 DE assertion time
mbed_official 125:23cc3068a9e4 1544 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 1545 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 1546 * @param USART_AssertionTime: specifies the time between the activation of the DE
mbed_official 125:23cc3068a9e4 1547 * signal and the beginning of the start bit
mbed_official 125:23cc3068a9e4 1548 * @retval None
mbed_official 125:23cc3068a9e4 1549 */
mbed_official 125:23cc3068a9e4 1550 void USART_SetDEAssertionTime(USART_TypeDef* USARTx, uint32_t USART_DEAssertionTime)
mbed_official 125:23cc3068a9e4 1551 {
mbed_official 125:23cc3068a9e4 1552 /* Check the parameters */
mbed_official 125:23cc3068a9e4 1553 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 1554 assert_param(IS_USART_DE_ASSERTION_DEASSERTION_TIME(USART_DEAssertionTime));
mbed_official 125:23cc3068a9e4 1555
mbed_official 125:23cc3068a9e4 1556 /* Clear the DE assertion time */
mbed_official 125:23cc3068a9e4 1557 USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_DEAT);
mbed_official 125:23cc3068a9e4 1558 /* Set the new value for the DE assertion time */
mbed_official 125:23cc3068a9e4 1559 USARTx->CR1 |=((uint32_t)USART_DEAssertionTime << (uint32_t)0x15);
mbed_official 125:23cc3068a9e4 1560 }
mbed_official 125:23cc3068a9e4 1561
mbed_official 125:23cc3068a9e4 1562 /**
mbed_official 125:23cc3068a9e4 1563 * @brief Sets the specified RS485 DE deassertion time
mbed_official 125:23cc3068a9e4 1564 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 1565 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 1566 * @param USART_DeassertionTime: specifies the time between the middle of the last
mbed_official 125:23cc3068a9e4 1567 * stop bit in a transmitted message and the de-activation of the DE signal
mbed_official 125:23cc3068a9e4 1568 * @retval None
mbed_official 125:23cc3068a9e4 1569 */
mbed_official 125:23cc3068a9e4 1570 void USART_SetDEDeassertionTime(USART_TypeDef* USARTx, uint32_t USART_DEDeassertionTime)
mbed_official 125:23cc3068a9e4 1571 {
mbed_official 125:23cc3068a9e4 1572 /* Check the parameters */
mbed_official 125:23cc3068a9e4 1573 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 1574 assert_param(IS_USART_DE_ASSERTION_DEASSERTION_TIME(USART_DEDeassertionTime));
mbed_official 125:23cc3068a9e4 1575
mbed_official 125:23cc3068a9e4 1576 /* Clear the DE deassertion time */
mbed_official 125:23cc3068a9e4 1577 USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_DEDT);
mbed_official 125:23cc3068a9e4 1578 /* Set the new value for the DE deassertion time */
mbed_official 125:23cc3068a9e4 1579 USARTx->CR1 |=((uint32_t)USART_DEDeassertionTime << (uint32_t)0x10);
mbed_official 125:23cc3068a9e4 1580 }
mbed_official 125:23cc3068a9e4 1581
mbed_official 125:23cc3068a9e4 1582 /**
mbed_official 125:23cc3068a9e4 1583 * @}
mbed_official 125:23cc3068a9e4 1584 */
mbed_official 125:23cc3068a9e4 1585
mbed_official 125:23cc3068a9e4 1586 /** @defgroup USART_Group11 DMA transfers management functions
mbed_official 125:23cc3068a9e4 1587 * @brief DMA transfers management functions
mbed_official 125:23cc3068a9e4 1588 *
mbed_official 125:23cc3068a9e4 1589 @verbatim
mbed_official 125:23cc3068a9e4 1590 ===============================================================================
mbed_official 125:23cc3068a9e4 1591 ##### DMA transfers management functions #####
mbed_official 125:23cc3068a9e4 1592 ===============================================================================
mbed_official 125:23cc3068a9e4 1593 [..] This section provides two functions that can be used only in DMA mode.
mbed_official 125:23cc3068a9e4 1594 [..] In DMA Mode, the USART communication can be managed by 2 DMA Channel
mbed_official 125:23cc3068a9e4 1595 requests:
mbed_official 125:23cc3068a9e4 1596 (#) USART_DMAReq_Tx: specifies the Tx buffer DMA transfer request.
mbed_official 125:23cc3068a9e4 1597 (#) USART_DMAReq_Rx: specifies the Rx buffer DMA transfer request.
mbed_official 125:23cc3068a9e4 1598 [..] In this Mode it is advised to use the following function:
mbed_official 125:23cc3068a9e4 1599 (+) void USART_DMACmd(USART_TypeDef* USARTx, uint16_t USART_DMAReq,
mbed_official 125:23cc3068a9e4 1600 FunctionalState NewState).
mbed_official 125:23cc3068a9e4 1601 @endverbatim
mbed_official 125:23cc3068a9e4 1602 * @{
mbed_official 125:23cc3068a9e4 1603 */
mbed_official 125:23cc3068a9e4 1604
mbed_official 125:23cc3068a9e4 1605 /**
mbed_official 125:23cc3068a9e4 1606 * @brief Enables or disables the USART's DMA interface.
mbed_official 125:23cc3068a9e4 1607 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 1608 * following values: USART1 or USART2 or USART3 or UART4.
mbed_official 125:23cc3068a9e4 1609 * @param USART_DMAReq: specifies the DMA request.
mbed_official 125:23cc3068a9e4 1610 * This parameter can be any combination of the following values:
mbed_official 125:23cc3068a9e4 1611 * @arg USART_DMAReq_Tx: USART DMA transmit request
mbed_official 125:23cc3068a9e4 1612 * @arg USART_DMAReq_Rx: USART DMA receive request
mbed_official 125:23cc3068a9e4 1613 * @param NewState: new state of the DMA Request sources.
mbed_official 125:23cc3068a9e4 1614 * This parameter can be: ENABLE or DISABLE.
mbed_official 125:23cc3068a9e4 1615 * @retval None
mbed_official 125:23cc3068a9e4 1616 */
mbed_official 125:23cc3068a9e4 1617 void USART_DMACmd(USART_TypeDef* USARTx, uint32_t USART_DMAReq, FunctionalState NewState)
mbed_official 125:23cc3068a9e4 1618 {
mbed_official 125:23cc3068a9e4 1619 /* Check the parameters */
mbed_official 125:23cc3068a9e4 1620 assert_param(IS_USART_1234_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 1621 assert_param(IS_USART_DMAREQ(USART_DMAReq));
mbed_official 125:23cc3068a9e4 1622 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 125:23cc3068a9e4 1623
mbed_official 125:23cc3068a9e4 1624 if (NewState != DISABLE)
mbed_official 125:23cc3068a9e4 1625 {
mbed_official 125:23cc3068a9e4 1626 /* Enable the DMA transfer for selected requests by setting the DMAT and/or
mbed_official 125:23cc3068a9e4 1627 DMAR bits in the USART CR3 register */
mbed_official 125:23cc3068a9e4 1628 USARTx->CR3 |= USART_DMAReq;
mbed_official 125:23cc3068a9e4 1629 }
mbed_official 125:23cc3068a9e4 1630 else
mbed_official 125:23cc3068a9e4 1631 {
mbed_official 125:23cc3068a9e4 1632 /* Disable the DMA transfer for selected requests by clearing the DMAT and/or
mbed_official 125:23cc3068a9e4 1633 DMAR bits in the USART CR3 register */
mbed_official 125:23cc3068a9e4 1634 USARTx->CR3 &= (uint32_t)~USART_DMAReq;
mbed_official 125:23cc3068a9e4 1635 }
mbed_official 125:23cc3068a9e4 1636 }
mbed_official 125:23cc3068a9e4 1637
mbed_official 125:23cc3068a9e4 1638 /**
mbed_official 125:23cc3068a9e4 1639 * @brief Enables or disables the USART's DMA interface when reception error occurs.
mbed_official 125:23cc3068a9e4 1640 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 1641 * following values: USART1 or USART2 or USART3 or UART4.
mbed_official 125:23cc3068a9e4 1642 * @param USART_DMAOnError: specifies the DMA status in case of reception error.
mbed_official 125:23cc3068a9e4 1643 * This parameter can be any combination of the following values:
mbed_official 125:23cc3068a9e4 1644 * @arg USART_DMAOnError_Enable: DMA receive request enabled when the USART DMA
mbed_official 125:23cc3068a9e4 1645 * reception error is asserted.
mbed_official 125:23cc3068a9e4 1646 * @arg USART_DMAOnError_Disable: DMA receive request disabled when the USART DMA
mbed_official 125:23cc3068a9e4 1647 * reception error is asserted.
mbed_official 125:23cc3068a9e4 1648 * @retval None
mbed_official 125:23cc3068a9e4 1649 */
mbed_official 125:23cc3068a9e4 1650 void USART_DMAReceptionErrorConfig(USART_TypeDef* USARTx, uint32_t USART_DMAOnError)
mbed_official 125:23cc3068a9e4 1651 {
mbed_official 125:23cc3068a9e4 1652 /* Check the parameters */
mbed_official 125:23cc3068a9e4 1653 assert_param(IS_USART_1234_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 1654 assert_param(IS_USART_DMAONERROR(USART_DMAOnError));
mbed_official 125:23cc3068a9e4 1655
mbed_official 125:23cc3068a9e4 1656 /* Clear the DMA Reception error detection bit */
mbed_official 125:23cc3068a9e4 1657 USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_DDRE);
mbed_official 125:23cc3068a9e4 1658 /* Set the new value for the DMA Reception error detection bit */
mbed_official 125:23cc3068a9e4 1659 USARTx->CR3 |= USART_DMAOnError;
mbed_official 125:23cc3068a9e4 1660 }
mbed_official 125:23cc3068a9e4 1661
mbed_official 125:23cc3068a9e4 1662 /**
mbed_official 125:23cc3068a9e4 1663 * @}
mbed_official 125:23cc3068a9e4 1664 */
mbed_official 125:23cc3068a9e4 1665
mbed_official 125:23cc3068a9e4 1666 /** @defgroup USART_Group12 Interrupts and flags management functions
mbed_official 125:23cc3068a9e4 1667 * @brief Interrupts and flags management functions
mbed_official 125:23cc3068a9e4 1668 *
mbed_official 125:23cc3068a9e4 1669 @verbatim
mbed_official 125:23cc3068a9e4 1670 ===============================================================================
mbed_official 125:23cc3068a9e4 1671 ##### Interrupts and flags management functions #####
mbed_official 125:23cc3068a9e4 1672 ===============================================================================
mbed_official 125:23cc3068a9e4 1673 [..] This subsection provides a set of functions allowing to configure the
mbed_official 125:23cc3068a9e4 1674 USART Interrupts sources, Requests and check or clear the flags or pending bits status.
mbed_official 125:23cc3068a9e4 1675 The user should identify which mode will be used in his application to
mbed_official 125:23cc3068a9e4 1676 manage the communication: Polling mode, Interrupt mode.
mbed_official 125:23cc3068a9e4 1677
mbed_official 125:23cc3068a9e4 1678 *** Polling Mode ***
mbed_official 125:23cc3068a9e4 1679 ====================
mbed_official 125:23cc3068a9e4 1680 [..] In Polling Mode, the SPI communication can be managed by these flags:
mbed_official 125:23cc3068a9e4 1681 (#) USART_FLAG_REACK: to indicate the status of the Receive Enable
mbed_official 125:23cc3068a9e4 1682 acknowledge flag
mbed_official 125:23cc3068a9e4 1683 (#) USART_FLAG_TEACK: to indicate the status of the Transmit Enable
mbed_official 125:23cc3068a9e4 1684 acknowledge flag.
mbed_official 125:23cc3068a9e4 1685 (#) USART_FLAG_WUF: to indicate the status of the Wake up flag.
mbed_official 125:23cc3068a9e4 1686 (#) USART_FLAG_RWU: to indicate the status of the Receive Wake up flag.
mbed_official 125:23cc3068a9e4 1687 (#) USART_FLAG_SBK: to indicate the status of the Send Break flag.
mbed_official 125:23cc3068a9e4 1688 (#) USART_FLAG_CMF: to indicate the status of the Character match flag.
mbed_official 125:23cc3068a9e4 1689 (#) USART_FLAG_BUSY: to indicate the status of the Busy flag.
mbed_official 125:23cc3068a9e4 1690 (#) USART_FLAG_ABRF: to indicate the status of the Auto baud rate flag.
mbed_official 125:23cc3068a9e4 1691 (#) USART_FLAG_ABRE: to indicate the status of the Auto baud rate error flag.
mbed_official 125:23cc3068a9e4 1692 (#) USART_FLAG_EOBF: to indicate the status of the End of block flag.
mbed_official 125:23cc3068a9e4 1693 (#) USART_FLAG_RTOF: to indicate the status of the Receive time out flag.
mbed_official 125:23cc3068a9e4 1694 (#) USART_FLAG_nCTSS: to indicate the status of the Inverted nCTS input
mbed_official 125:23cc3068a9e4 1695 bit status.
mbed_official 125:23cc3068a9e4 1696 (#) USART_FLAG_TXE: to indicate the status of the transmit buffer register.
mbed_official 125:23cc3068a9e4 1697 (#) USART_FLAG_RXNE: to indicate the status of the receive buffer register.
mbed_official 125:23cc3068a9e4 1698 (#) USART_FLAG_TC: to indicate the status of the transmit operation.
mbed_official 125:23cc3068a9e4 1699 (#) USART_FLAG_IDLE: to indicate the status of the Idle Line.
mbed_official 125:23cc3068a9e4 1700 (#) USART_FLAG_CTS: to indicate the status of the nCTS input.
mbed_official 125:23cc3068a9e4 1701 (#) USART_FLAG_LBD: to indicate the status of the LIN break detection.
mbed_official 125:23cc3068a9e4 1702 (#) USART_FLAG_NE: to indicate if a noise error occur.
mbed_official 125:23cc3068a9e4 1703 (#) USART_FLAG_FE: to indicate if a frame error occur.
mbed_official 125:23cc3068a9e4 1704 (#) USART_FLAG_PE: to indicate if a parity error occur.
mbed_official 125:23cc3068a9e4 1705 (#) USART_FLAG_ORE: to indicate if an Overrun error occur.
mbed_official 125:23cc3068a9e4 1706 [..] In this Mode it is advised to use the following functions:
mbed_official 125:23cc3068a9e4 1707 (+) FlagStatus USART_GetFlagStatus(USART_TypeDef* USARTx, uint16_t USART_FLAG).
mbed_official 125:23cc3068a9e4 1708 (+) void USART_ClearFlag(USART_TypeDef* USARTx, uint16_t USART_FLAG).
mbed_official 125:23cc3068a9e4 1709
mbed_official 125:23cc3068a9e4 1710 *** Interrupt Mode ***
mbed_official 125:23cc3068a9e4 1711 ======================
mbed_official 125:23cc3068a9e4 1712 [..] In Interrupt Mode, the USART communication can be managed by 8 interrupt
mbed_official 125:23cc3068a9e4 1713 sources and 10 pending bits:
mbed_official 125:23cc3068a9e4 1714 (+) Pending Bits:
mbed_official 125:23cc3068a9e4 1715 (##) USART_IT_WU: to indicate the status of the Wake up interrupt.
mbed_official 125:23cc3068a9e4 1716 (##) USART_IT_CM: to indicate the status of Character match interrupt.
mbed_official 125:23cc3068a9e4 1717 (##) USART_IT_EOB: to indicate the status of End of block interrupt.
mbed_official 125:23cc3068a9e4 1718 (##) USART_IT_RTO: to indicate the status of Receive time out interrupt.
mbed_official 125:23cc3068a9e4 1719 (##) USART_IT_CTS: to indicate the status of CTS change interrupt.
mbed_official 125:23cc3068a9e4 1720 (##) USART_IT_LBD: to indicate the status of LIN Break detection interrupt.
mbed_official 125:23cc3068a9e4 1721 (##) USART_IT_TC: to indicate the status of Transmission complete interrupt.
mbed_official 125:23cc3068a9e4 1722 (##) USART_IT_IDLE: to indicate the status of IDLE line detected interrupt.
mbed_official 125:23cc3068a9e4 1723 (##) USART_IT_ORE: to indicate the status of OverRun Error interrupt.
mbed_official 125:23cc3068a9e4 1724 (##) USART_IT_NE: to indicate the status of Noise Error interrupt.
mbed_official 125:23cc3068a9e4 1725 (##) USART_IT_FE: to indicate the status of Framing Error interrupt.
mbed_official 125:23cc3068a9e4 1726 (##) USART_IT_PE: to indicate the status of Parity Error interrupt.
mbed_official 125:23cc3068a9e4 1727
mbed_official 125:23cc3068a9e4 1728 (+) Interrupt Source:
mbed_official 125:23cc3068a9e4 1729 (##) USART_IT_WU: specifies the interrupt source for Wake up interrupt.
mbed_official 125:23cc3068a9e4 1730 (##) USART_IT_CM: specifies the interrupt source for Character match
mbed_official 125:23cc3068a9e4 1731 interrupt.
mbed_official 125:23cc3068a9e4 1732 (##) USART_IT_EOB: specifies the interrupt source for End of block
mbed_official 125:23cc3068a9e4 1733 interrupt.
mbed_official 125:23cc3068a9e4 1734 (##) USART_IT_RTO: specifies the interrupt source for Receive time-out
mbed_official 125:23cc3068a9e4 1735 interrupt.
mbed_official 125:23cc3068a9e4 1736 (##) USART_IT_CTS: specifies the interrupt source for CTS change interrupt.
mbed_official 125:23cc3068a9e4 1737 (##) USART_IT_LBD: specifies the interrupt source for LIN Break
mbed_official 125:23cc3068a9e4 1738 detection interrupt.
mbed_official 125:23cc3068a9e4 1739 (##) USART_IT_TXE: specifies the interrupt source for Tansmit Data
mbed_official 125:23cc3068a9e4 1740 Register empty interrupt.
mbed_official 125:23cc3068a9e4 1741 (##) USART_IT_TC: specifies the interrupt source for Transmission
mbed_official 125:23cc3068a9e4 1742 complete interrupt.
mbed_official 125:23cc3068a9e4 1743 (##) USART_IT_RXNE: specifies the interrupt source for Receive Data
mbed_official 125:23cc3068a9e4 1744 register not empty interrupt.
mbed_official 125:23cc3068a9e4 1745 (##) USART_IT_IDLE: specifies the interrupt source for Idle line
mbed_official 125:23cc3068a9e4 1746 detection interrupt.
mbed_official 125:23cc3068a9e4 1747 (##) USART_IT_PE: specifies the interrupt source for Parity Error interrupt.
mbed_official 125:23cc3068a9e4 1748 (##) USART_IT_ERR: specifies the interrupt source for Error interrupt
mbed_official 125:23cc3068a9e4 1749 (Frame error, noise error, overrun error)
mbed_official 125:23cc3068a9e4 1750 -@@- Some parameters are coded in order to use them as interrupt
mbed_official 125:23cc3068a9e4 1751 source or as pending bits.
mbed_official 125:23cc3068a9e4 1752 [..] In this Mode it is advised to use the following functions:
mbed_official 125:23cc3068a9e4 1753 (+) void USART_ITConfig(USART_TypeDef* USARTx, uint16_t USART_IT, FunctionalState NewState).
mbed_official 125:23cc3068a9e4 1754 (+) ITStatus USART_GetITStatus(USART_TypeDef* USARTx, uint16_t USART_IT).
mbed_official 125:23cc3068a9e4 1755 (+) void USART_ClearITPendingBit(USART_TypeDef* USARTx, uint16_t USART_IT).
mbed_official 125:23cc3068a9e4 1756
mbed_official 125:23cc3068a9e4 1757 @endverbatim
mbed_official 125:23cc3068a9e4 1758 * @{
mbed_official 125:23cc3068a9e4 1759 */
mbed_official 125:23cc3068a9e4 1760
mbed_official 125:23cc3068a9e4 1761 /**
mbed_official 125:23cc3068a9e4 1762 * @brief Enables or disables the specified USART interrupts.
mbed_official 125:23cc3068a9e4 1763 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 1764 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 1765 * @param USART_IT: specifies the USART interrupt sources to be enabled or disabled.
mbed_official 125:23cc3068a9e4 1766 * This parameter can be one of the following values:
mbed_official 125:23cc3068a9e4 1767 * @arg USART_IT_WU: Wake up interrupt.
mbed_official 125:23cc3068a9e4 1768 * @arg USART_IT_CM: Character match interrupt.
mbed_official 125:23cc3068a9e4 1769 * @arg USART_IT_EOB: End of block interrupt.
mbed_official 125:23cc3068a9e4 1770 * @arg USART_IT_RTO: Receive time out interrupt.
mbed_official 125:23cc3068a9e4 1771 * @arg USART_IT_CTS: CTS change interrupt.
mbed_official 125:23cc3068a9e4 1772 * @arg USART_IT_LBD: LIN Break detection interrupt.
mbed_official 125:23cc3068a9e4 1773 * @arg USART_IT_TXE: Tansmit Data Register empty interrupt.
mbed_official 125:23cc3068a9e4 1774 * @arg USART_IT_TC: Transmission complete interrupt.
mbed_official 125:23cc3068a9e4 1775 * @arg USART_IT_RXNE: Receive Data register not empty interrupt.
mbed_official 125:23cc3068a9e4 1776 * @arg USART_IT_IDLE: Idle line detection interrupt.
mbed_official 125:23cc3068a9e4 1777 * @arg USART_IT_PE: Parity Error interrupt.
mbed_official 125:23cc3068a9e4 1778 * @arg USART_IT_ERR: Error interrupt(Frame error, noise error, overrun error)
mbed_official 125:23cc3068a9e4 1779 * @param NewState: new state of the specified USARTx interrupts.
mbed_official 125:23cc3068a9e4 1780 * This parameter can be: ENABLE or DISABLE.
mbed_official 125:23cc3068a9e4 1781 * @retval None
mbed_official 125:23cc3068a9e4 1782 */
mbed_official 125:23cc3068a9e4 1783 void USART_ITConfig(USART_TypeDef* USARTx, uint32_t USART_IT, FunctionalState NewState)
mbed_official 125:23cc3068a9e4 1784 {
mbed_official 125:23cc3068a9e4 1785 uint32_t usartreg = 0, itpos = 0, itmask = 0;
mbed_official 125:23cc3068a9e4 1786 uint32_t usartxbase = 0;
mbed_official 125:23cc3068a9e4 1787 /* Check the parameters */
mbed_official 125:23cc3068a9e4 1788 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 1789 assert_param(IS_USART_CONFIG_IT(USART_IT));
mbed_official 125:23cc3068a9e4 1790 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 125:23cc3068a9e4 1791
mbed_official 125:23cc3068a9e4 1792 usartxbase = (uint32_t)USARTx;
mbed_official 125:23cc3068a9e4 1793
mbed_official 125:23cc3068a9e4 1794 /* Get the USART register index */
mbed_official 125:23cc3068a9e4 1795 usartreg = (((uint16_t)USART_IT) >> 0x08);
mbed_official 125:23cc3068a9e4 1796
mbed_official 125:23cc3068a9e4 1797 /* Get the interrupt position */
mbed_official 125:23cc3068a9e4 1798 itpos = USART_IT & IT_MASK;
mbed_official 125:23cc3068a9e4 1799 itmask = (((uint32_t)0x01) << itpos);
mbed_official 125:23cc3068a9e4 1800
mbed_official 125:23cc3068a9e4 1801 if (usartreg == 0x02) /* The IT is in CR2 register */
mbed_official 125:23cc3068a9e4 1802 {
mbed_official 125:23cc3068a9e4 1803 usartxbase += 0x04;
mbed_official 125:23cc3068a9e4 1804 }
mbed_official 125:23cc3068a9e4 1805 else if (usartreg == 0x03) /* The IT is in CR3 register */
mbed_official 125:23cc3068a9e4 1806 {
mbed_official 125:23cc3068a9e4 1807 usartxbase += 0x08;
mbed_official 125:23cc3068a9e4 1808 }
mbed_official 125:23cc3068a9e4 1809 else /* The IT is in CR1 register */
mbed_official 125:23cc3068a9e4 1810 {
mbed_official 125:23cc3068a9e4 1811 }
mbed_official 125:23cc3068a9e4 1812 if (NewState != DISABLE)
mbed_official 125:23cc3068a9e4 1813 {
mbed_official 125:23cc3068a9e4 1814 *(__IO uint32_t*)usartxbase |= itmask;
mbed_official 125:23cc3068a9e4 1815 }
mbed_official 125:23cc3068a9e4 1816 else
mbed_official 125:23cc3068a9e4 1817 {
mbed_official 125:23cc3068a9e4 1818 *(__IO uint32_t*)usartxbase &= ~itmask;
mbed_official 125:23cc3068a9e4 1819 }
mbed_official 125:23cc3068a9e4 1820 }
mbed_official 125:23cc3068a9e4 1821
mbed_official 125:23cc3068a9e4 1822 /**
mbed_official 125:23cc3068a9e4 1823 * @brief Enables the specified USART's Request.
mbed_official 125:23cc3068a9e4 1824 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 1825 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 1826 * @param USART_Request: specifies the USART request.
mbed_official 125:23cc3068a9e4 1827 * This parameter can be any combination of the following values:
mbed_official 125:23cc3068a9e4 1828 * @arg USART_Request_TXFRQ: Transmit data flush ReQuest
mbed_official 125:23cc3068a9e4 1829 * @arg USART_Request_RXFRQ: Receive data flush ReQuest
mbed_official 125:23cc3068a9e4 1830 * @arg USART_Request_MMRQ: Mute Mode ReQuest
mbed_official 125:23cc3068a9e4 1831 * @arg USART_Request_SBKRQ: Send Break ReQuest
mbed_official 125:23cc3068a9e4 1832 * @arg USART_Request_ABRRQ: Auto Baud Rate ReQuest
mbed_official 125:23cc3068a9e4 1833 * @param NewState: new state of the DMA interface when reception error occurs.
mbed_official 125:23cc3068a9e4 1834 * This parameter can be: ENABLE or DISABLE.
mbed_official 125:23cc3068a9e4 1835 * @retval None
mbed_official 125:23cc3068a9e4 1836 */
mbed_official 125:23cc3068a9e4 1837 void USART_RequestCmd(USART_TypeDef* USARTx, uint32_t USART_Request, FunctionalState NewState)
mbed_official 125:23cc3068a9e4 1838 {
mbed_official 125:23cc3068a9e4 1839 /* Check the parameters */
mbed_official 125:23cc3068a9e4 1840 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 1841 assert_param(IS_USART_REQUEST(USART_Request));
mbed_official 125:23cc3068a9e4 1842 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 125:23cc3068a9e4 1843
mbed_official 125:23cc3068a9e4 1844 if (NewState != DISABLE)
mbed_official 125:23cc3068a9e4 1845 {
mbed_official 125:23cc3068a9e4 1846 /* Enable the USART ReQuest by setting the dedicated request bit in the RQR
mbed_official 125:23cc3068a9e4 1847 register.*/
mbed_official 125:23cc3068a9e4 1848 USARTx->RQR |= USART_Request;
mbed_official 125:23cc3068a9e4 1849 }
mbed_official 125:23cc3068a9e4 1850 else
mbed_official 125:23cc3068a9e4 1851 {
mbed_official 125:23cc3068a9e4 1852 /* Disable the USART ReQuest by clearing the dedicated request bit in the RQR
mbed_official 125:23cc3068a9e4 1853 register.*/
mbed_official 125:23cc3068a9e4 1854 USARTx->RQR &= (uint32_t)~USART_Request;
mbed_official 125:23cc3068a9e4 1855 }
mbed_official 125:23cc3068a9e4 1856 }
mbed_official 125:23cc3068a9e4 1857
mbed_official 125:23cc3068a9e4 1858 /**
mbed_official 125:23cc3068a9e4 1859 * @brief Enables or disables the USART's Overrun detection.
mbed_official 125:23cc3068a9e4 1860 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 1861 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 1862 * @param USART_OVRDetection: specifies the OVR detection status in case of OVR error.
mbed_official 125:23cc3068a9e4 1863 * This parameter can be any combination of the following values:
mbed_official 125:23cc3068a9e4 1864 * @arg USART_OVRDetection_Enable: OVR error detection enabled when the USART OVR error
mbed_official 125:23cc3068a9e4 1865 * is asserted.
mbed_official 125:23cc3068a9e4 1866 * @arg USART_OVRDetection_Disable: OVR error detection disabled when the USART OVR error
mbed_official 125:23cc3068a9e4 1867 * is asserted.
mbed_official 125:23cc3068a9e4 1868 * @retval None
mbed_official 125:23cc3068a9e4 1869 */
mbed_official 125:23cc3068a9e4 1870 void USART_OverrunDetectionConfig(USART_TypeDef* USARTx, uint32_t USART_OVRDetection)
mbed_official 125:23cc3068a9e4 1871 {
mbed_official 125:23cc3068a9e4 1872 /* Check the parameters */
mbed_official 125:23cc3068a9e4 1873 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 1874 assert_param(IS_USART_OVRDETECTION(USART_OVRDetection));
mbed_official 125:23cc3068a9e4 1875
mbed_official 125:23cc3068a9e4 1876 /* Clear the OVR detection bit */
mbed_official 125:23cc3068a9e4 1877 USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_OVRDIS);
mbed_official 125:23cc3068a9e4 1878 /* Set the new value for the OVR detection bit */
mbed_official 125:23cc3068a9e4 1879 USARTx->CR3 |= USART_OVRDetection;
mbed_official 125:23cc3068a9e4 1880 }
mbed_official 125:23cc3068a9e4 1881
mbed_official 125:23cc3068a9e4 1882 /**
mbed_official 125:23cc3068a9e4 1883 * @brief Checks whether the specified USART flag is set or not.
mbed_official 125:23cc3068a9e4 1884 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 1885 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 1886 * @param USART_FLAG: specifies the flag to check.
mbed_official 125:23cc3068a9e4 1887 * This parameter can be one of the following values:
mbed_official 125:23cc3068a9e4 1888 * @arg USART_FLAG_REACK: Receive Enable acknowledge flag.
mbed_official 125:23cc3068a9e4 1889 * @arg USART_FLAG_TEACK: Transmit Enable acknowledge flag.
mbed_official 125:23cc3068a9e4 1890 * @arg USART_FLAG_WUF: Wake up flag.
mbed_official 125:23cc3068a9e4 1891 * @arg USART_FLAG_RWU: Receive Wake up flag.
mbed_official 125:23cc3068a9e4 1892 * @arg USART_FLAG_SBK: Send Break flag.
mbed_official 125:23cc3068a9e4 1893 * @arg USART_FLAG_CMF: Character match flag.
mbed_official 125:23cc3068a9e4 1894 * @arg USART_FLAG_BUSY: Busy flag.
mbed_official 125:23cc3068a9e4 1895 * @arg USART_FLAG_ABRF: Auto baud rate flag.
mbed_official 125:23cc3068a9e4 1896 * @arg USART_FLAG_ABRE: Auto baud rate error flag.
mbed_official 125:23cc3068a9e4 1897 * @arg USART_FLAG_EOBF: End of block flag.
mbed_official 125:23cc3068a9e4 1898 * @arg USART_FLAG_RTOF: Receive time out flag.
mbed_official 125:23cc3068a9e4 1899 * @arg USART_FLAG_nCTSS: Inverted nCTS input bit status.
mbed_official 125:23cc3068a9e4 1900 * @arg USART_FLAG_CTS: CTS Change flag.
mbed_official 125:23cc3068a9e4 1901 * @arg USART_FLAG_LBD: LIN Break detection flag.
mbed_official 125:23cc3068a9e4 1902 * @arg USART_FLAG_TXE: Transmit data register empty flag.
mbed_official 125:23cc3068a9e4 1903 * @arg USART_FLAG_TC: Transmission Complete flag.
mbed_official 125:23cc3068a9e4 1904 * @arg USART_FLAG_RXNE: Receive data register not empty flag.
mbed_official 125:23cc3068a9e4 1905 * @arg USART_FLAG_IDLE: Idle Line detection flag.
mbed_official 125:23cc3068a9e4 1906 * @arg USART_FLAG_ORE: OverRun Error flag.
mbed_official 125:23cc3068a9e4 1907 * @arg USART_FLAG_NE: Noise Error flag.
mbed_official 125:23cc3068a9e4 1908 * @arg USART_FLAG_FE: Framing Error flag.
mbed_official 125:23cc3068a9e4 1909 * @arg USART_FLAG_PE: Parity Error flag.
mbed_official 125:23cc3068a9e4 1910 * @retval The new state of USART_FLAG (SET or RESET).
mbed_official 125:23cc3068a9e4 1911 */
mbed_official 125:23cc3068a9e4 1912 FlagStatus USART_GetFlagStatus(USART_TypeDef* USARTx, uint32_t USART_FLAG)
mbed_official 125:23cc3068a9e4 1913 {
mbed_official 125:23cc3068a9e4 1914 FlagStatus bitstatus = RESET;
mbed_official 125:23cc3068a9e4 1915 /* Check the parameters */
mbed_official 125:23cc3068a9e4 1916 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 1917 assert_param(IS_USART_FLAG(USART_FLAG));
mbed_official 125:23cc3068a9e4 1918
mbed_official 125:23cc3068a9e4 1919 if ((USARTx->ISR & USART_FLAG) != (uint16_t)RESET)
mbed_official 125:23cc3068a9e4 1920 {
mbed_official 125:23cc3068a9e4 1921 bitstatus = SET;
mbed_official 125:23cc3068a9e4 1922 }
mbed_official 125:23cc3068a9e4 1923 else
mbed_official 125:23cc3068a9e4 1924 {
mbed_official 125:23cc3068a9e4 1925 bitstatus = RESET;
mbed_official 125:23cc3068a9e4 1926 }
mbed_official 125:23cc3068a9e4 1927 return bitstatus;
mbed_official 125:23cc3068a9e4 1928 }
mbed_official 125:23cc3068a9e4 1929
mbed_official 125:23cc3068a9e4 1930 /**
mbed_official 125:23cc3068a9e4 1931 * @brief Clears the USARTx's pending flags.
mbed_official 125:23cc3068a9e4 1932 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 1933 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 1934 * @param USART_FLAG: specifies the flag to clear.
mbed_official 125:23cc3068a9e4 1935 * This parameter can be any combination of the following values:
mbed_official 125:23cc3068a9e4 1936 * @arg USART_FLAG_WUF: Wake up flag.
mbed_official 125:23cc3068a9e4 1937 * @arg USART_FLAG_CMF: Character match flag.
mbed_official 125:23cc3068a9e4 1938 * @arg USART_FLAG_EOBF: End of block flag.
mbed_official 125:23cc3068a9e4 1939 * @arg USART_FLAG_RTOF: Receive time out flag.
mbed_official 125:23cc3068a9e4 1940 * @arg USART_FLAG_CTS: CTS Change flag.
mbed_official 125:23cc3068a9e4 1941 * @arg USART_FLAG_LBD: LIN Break detection flag.
mbed_official 125:23cc3068a9e4 1942 * @arg USART_FLAG_TC: Transmission Complete flag.
mbed_official 125:23cc3068a9e4 1943 * @arg USART_FLAG_IDLE: IDLE line detected flag.
mbed_official 125:23cc3068a9e4 1944 * @arg USART_FLAG_ORE: OverRun Error flag.
mbed_official 125:23cc3068a9e4 1945 * @arg USART_FLAG_NE: Noise Error flag.
mbed_official 125:23cc3068a9e4 1946 * @arg USART_FLAG_FE: Framing Error flag.
mbed_official 125:23cc3068a9e4 1947 * @arg USART_FLAG_PE: Parity Errorflag.
mbed_official 125:23cc3068a9e4 1948 *
mbed_official 125:23cc3068a9e4 1949 * @note
mbed_official 125:23cc3068a9e4 1950 * - RXNE pending bit is cleared by a read to the USART_RDR register
mbed_official 125:23cc3068a9e4 1951 * (USART_ReceiveData()) or by writing 1 to the RXFRQ in the register USART_RQR
mbed_official 125:23cc3068a9e4 1952 * (USART_RequestCmd()).
mbed_official 125:23cc3068a9e4 1953 * - TC flag can be also cleared by software sequence: a read operation to
mbed_official 125:23cc3068a9e4 1954 * USART_SR register (USART_GetFlagStatus()) followed by a write operation
mbed_official 125:23cc3068a9e4 1955 * to USART_TDR register (USART_SendData()).
mbed_official 125:23cc3068a9e4 1956 * - TXE flag is cleared by a write to the USART_TDR register
mbed_official 125:23cc3068a9e4 1957 * (USART_SendData()) or by writing 1 to the TXFRQ in the register USART_RQR
mbed_official 125:23cc3068a9e4 1958 * (USART_RequestCmd()).
mbed_official 125:23cc3068a9e4 1959 * - SBKF flag is cleared by 1 to the SBKRQ in the register USART_RQR
mbed_official 125:23cc3068a9e4 1960 * (USART_RequestCmd()).
mbed_official 125:23cc3068a9e4 1961 * @retval None
mbed_official 125:23cc3068a9e4 1962 */
mbed_official 125:23cc3068a9e4 1963 void USART_ClearFlag(USART_TypeDef* USARTx, uint32_t USART_FLAG)
mbed_official 125:23cc3068a9e4 1964 {
mbed_official 125:23cc3068a9e4 1965 /* Check the parameters */
mbed_official 125:23cc3068a9e4 1966 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 1967 assert_param(IS_USART_CLEAR_FLAG(USART_FLAG));
mbed_official 125:23cc3068a9e4 1968
mbed_official 125:23cc3068a9e4 1969 USARTx->ICR = USART_FLAG;
mbed_official 125:23cc3068a9e4 1970 }
mbed_official 125:23cc3068a9e4 1971
mbed_official 125:23cc3068a9e4 1972 /**
mbed_official 125:23cc3068a9e4 1973 * @brief Checks whether the specified USART interrupt has occurred or not.
mbed_official 125:23cc3068a9e4 1974 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 1975 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 1976 * @param USART_IT: specifies the USART interrupt source to check.
mbed_official 125:23cc3068a9e4 1977 * This parameter can be one of the following values:
mbed_official 125:23cc3068a9e4 1978 * @arg USART_IT_WU: Wake up interrupt.
mbed_official 125:23cc3068a9e4 1979 * @arg USART_IT_CM: Character match interrupt.
mbed_official 125:23cc3068a9e4 1980 * @arg USART_IT_EOB: End of block interrupt.
mbed_official 125:23cc3068a9e4 1981 * @arg USART_IT_RTO: Receive time out interrupt.
mbed_official 125:23cc3068a9e4 1982 * @arg USART_IT_CTS: CTS change interrupt.
mbed_official 125:23cc3068a9e4 1983 * @arg USART_IT_LBD: LIN Break detection interrupt.
mbed_official 125:23cc3068a9e4 1984 * @arg USART_IT_TXE: Tansmit Data Register empty interrupt.
mbed_official 125:23cc3068a9e4 1985 * @arg USART_IT_TC: Transmission complete interrupt.
mbed_official 125:23cc3068a9e4 1986 * @arg USART_IT_RXNE: Receive Data register not empty interrupt.
mbed_official 125:23cc3068a9e4 1987 * @arg USART_IT_IDLE: Idle line detection interrupt.
mbed_official 125:23cc3068a9e4 1988 * @arg USART_IT_ORE: OverRun Error interrupt.
mbed_official 125:23cc3068a9e4 1989 * @arg USART_IT_NE: Noise Error interrupt.
mbed_official 125:23cc3068a9e4 1990 * @arg USART_IT_FE: Framing Error interrupt.
mbed_official 125:23cc3068a9e4 1991 * @arg USART_IT_PE: Parity Error interrupt.
mbed_official 125:23cc3068a9e4 1992 * @retval The new state of USART_IT (SET or RESET).
mbed_official 125:23cc3068a9e4 1993 */
mbed_official 125:23cc3068a9e4 1994 ITStatus USART_GetITStatus(USART_TypeDef* USARTx, uint32_t USART_IT)
mbed_official 125:23cc3068a9e4 1995 {
mbed_official 125:23cc3068a9e4 1996 uint32_t bitpos = 0, itmask = 0, usartreg = 0;
mbed_official 125:23cc3068a9e4 1997 ITStatus bitstatus = RESET;
mbed_official 125:23cc3068a9e4 1998 /* Check the parameters */
mbed_official 125:23cc3068a9e4 1999 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 2000 assert_param(IS_USART_GET_IT(USART_IT));
mbed_official 125:23cc3068a9e4 2001
mbed_official 125:23cc3068a9e4 2002 /* Get the USART register index */
mbed_official 125:23cc3068a9e4 2003 usartreg = (((uint16_t)USART_IT) >> 0x08);
mbed_official 125:23cc3068a9e4 2004 /* Get the interrupt position */
mbed_official 125:23cc3068a9e4 2005 itmask = USART_IT & IT_MASK;
mbed_official 125:23cc3068a9e4 2006 itmask = (uint32_t)0x01 << itmask;
mbed_official 125:23cc3068a9e4 2007
mbed_official 125:23cc3068a9e4 2008 if (usartreg == 0x01) /* The IT is in CR1 register */
mbed_official 125:23cc3068a9e4 2009 {
mbed_official 125:23cc3068a9e4 2010 itmask &= USARTx->CR1;
mbed_official 125:23cc3068a9e4 2011 }
mbed_official 125:23cc3068a9e4 2012 else if (usartreg == 0x02) /* The IT is in CR2 register */
mbed_official 125:23cc3068a9e4 2013 {
mbed_official 125:23cc3068a9e4 2014 itmask &= USARTx->CR2;
mbed_official 125:23cc3068a9e4 2015 }
mbed_official 125:23cc3068a9e4 2016 else /* The IT is in CR3 register */
mbed_official 125:23cc3068a9e4 2017 {
mbed_official 125:23cc3068a9e4 2018 itmask &= USARTx->CR3;
mbed_official 125:23cc3068a9e4 2019 }
mbed_official 125:23cc3068a9e4 2020
mbed_official 125:23cc3068a9e4 2021 bitpos = USART_IT >> 0x10;
mbed_official 125:23cc3068a9e4 2022 bitpos = (uint32_t)0x01 << bitpos;
mbed_official 125:23cc3068a9e4 2023 bitpos &= USARTx->ISR;
mbed_official 125:23cc3068a9e4 2024 if ((itmask != (uint16_t)RESET)&&(bitpos != (uint16_t)RESET))
mbed_official 125:23cc3068a9e4 2025 {
mbed_official 125:23cc3068a9e4 2026 bitstatus = SET;
mbed_official 125:23cc3068a9e4 2027 }
mbed_official 125:23cc3068a9e4 2028 else
mbed_official 125:23cc3068a9e4 2029 {
mbed_official 125:23cc3068a9e4 2030 bitstatus = RESET;
mbed_official 125:23cc3068a9e4 2031 }
mbed_official 125:23cc3068a9e4 2032
mbed_official 125:23cc3068a9e4 2033 return bitstatus;
mbed_official 125:23cc3068a9e4 2034 }
mbed_official 125:23cc3068a9e4 2035
mbed_official 125:23cc3068a9e4 2036 /**
mbed_official 125:23cc3068a9e4 2037 * @brief Clears the USARTx's interrupt pending bits.
mbed_official 125:23cc3068a9e4 2038 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 125:23cc3068a9e4 2039 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 125:23cc3068a9e4 2040 * @param USART_IT: specifies the interrupt pending bit to clear.
mbed_official 125:23cc3068a9e4 2041 * This parameter can be one of the following values:
mbed_official 125:23cc3068a9e4 2042 * @arg USART_IT_WU: Wake up interrupt.
mbed_official 125:23cc3068a9e4 2043 * @arg USART_IT_CM: Character match interrupt.
mbed_official 125:23cc3068a9e4 2044 * @arg USART_IT_EOB: End of block interrupt.
mbed_official 125:23cc3068a9e4 2045 * @arg USART_IT_RTO: Receive time out interrupt.
mbed_official 125:23cc3068a9e4 2046 * @arg USART_IT_CTS: CTS change interrupt.
mbed_official 125:23cc3068a9e4 2047 * @arg USART_IT_LBD: LIN Break detection interrupt.
mbed_official 125:23cc3068a9e4 2048 * @arg USART_IT_TC: Transmission complete interrupt.
mbed_official 125:23cc3068a9e4 2049 * @arg USART_IT_IDLE: IDLE line detected interrupt.
mbed_official 125:23cc3068a9e4 2050 * @arg USART_IT_ORE: OverRun Error interrupt.
mbed_official 125:23cc3068a9e4 2051 * @arg USART_IT_NE: Noise Error interrupt.
mbed_official 125:23cc3068a9e4 2052 * @arg USART_IT_FE: Framing Error interrupt.
mbed_official 125:23cc3068a9e4 2053 * @arg USART_IT_PE: Parity Error interrupt.
mbed_official 125:23cc3068a9e4 2054 * @note
mbed_official 125:23cc3068a9e4 2055 * - RXNE pending bit is cleared by a read to the USART_RDR register
mbed_official 125:23cc3068a9e4 2056 * (USART_ReceiveData()) or by writing 1 to the RXFRQ in the register USART_RQR
mbed_official 125:23cc3068a9e4 2057 * (USART_RequestCmd()).
mbed_official 125:23cc3068a9e4 2058 * - TC pending bit can be also cleared by software sequence: a read
mbed_official 125:23cc3068a9e4 2059 * operation to USART_SR register (USART_GetITStatus()) followed by a write
mbed_official 125:23cc3068a9e4 2060 * operation to USART_TDR register (USART_SendData()).
mbed_official 125:23cc3068a9e4 2061 * - TXE pending bit is cleared by a write to the USART_TDR register
mbed_official 125:23cc3068a9e4 2062 * (USART_SendData()) or by writing 1 to the TXFRQ in the register USART_RQR
mbed_official 125:23cc3068a9e4 2063 * (USART_RequestCmd()).
mbed_official 125:23cc3068a9e4 2064 * @retval None
mbed_official 125:23cc3068a9e4 2065 */
mbed_official 125:23cc3068a9e4 2066 void USART_ClearITPendingBit(USART_TypeDef* USARTx, uint32_t USART_IT)
mbed_official 125:23cc3068a9e4 2067 {
mbed_official 125:23cc3068a9e4 2068 uint32_t bitpos = 0, itmask = 0;
mbed_official 125:23cc3068a9e4 2069 /* Check the parameters */
mbed_official 125:23cc3068a9e4 2070 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 125:23cc3068a9e4 2071 assert_param(IS_USART_CLEAR_IT(USART_IT));
mbed_official 125:23cc3068a9e4 2072
mbed_official 125:23cc3068a9e4 2073 bitpos = USART_IT >> 0x10;
mbed_official 125:23cc3068a9e4 2074 itmask = ((uint32_t)0x01 << (uint32_t)bitpos);
mbed_official 125:23cc3068a9e4 2075 USARTx->ICR = (uint32_t)itmask;
mbed_official 125:23cc3068a9e4 2076 }
mbed_official 125:23cc3068a9e4 2077
mbed_official 125:23cc3068a9e4 2078 /**
mbed_official 125:23cc3068a9e4 2079 * @}
mbed_official 125:23cc3068a9e4 2080 */
mbed_official 125:23cc3068a9e4 2081
mbed_official 125:23cc3068a9e4 2082 /**
mbed_official 125:23cc3068a9e4 2083 * @}
mbed_official 125:23cc3068a9e4 2084 */
mbed_official 125:23cc3068a9e4 2085
mbed_official 125:23cc3068a9e4 2086 /**
mbed_official 125:23cc3068a9e4 2087 * @}
mbed_official 125:23cc3068a9e4 2088 */
mbed_official 125:23cc3068a9e4 2089
mbed_official 125:23cc3068a9e4 2090 /**
mbed_official 125:23cc3068a9e4 2091 * @}
mbed_official 125:23cc3068a9e4 2092 */
mbed_official 125:23cc3068a9e4 2093
mbed_official 125:23cc3068a9e4 2094 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/