Ken Todotani / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/cmsis/TARGET_STM/TARGET_DISCO_F303VC/stm32f30x_usart.c@308:59cc78a25982, 2014-09-05 (annotated)

Committer:
todotani
Date:
Fri Sep 05 14:20:33 2014 +0000
Revision:
308:59cc78a25982
Parent:
157:90e3acc479a2 
BLE_Health_Thermometer for mbed HRM1017 with BLE library 0.1.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 157:90e3acc479a2 1 /**
mbed_official 157:90e3acc479a2 2 ******************************************************************************
mbed_official 157:90e3acc479a2 3 * @file stm32f30x_usart.c
mbed_official 157:90e3acc479a2 4 * @author MCD Application Team
mbed_official 157:90e3acc479a2 5 * @version V1.1.0
mbed_official 157:90e3acc479a2 6 * @date 27-February-2014
mbed_official 157:90e3acc479a2 7 * @brief This file provides firmware functions to manage the following
mbed_official 157:90e3acc479a2 8 * functionalities of the Universal synchronous asynchronous receiver
mbed_official 157:90e3acc479a2 9 * transmitter (USART):
mbed_official 157:90e3acc479a2 10 * + Initialization and Configuration
mbed_official 157:90e3acc479a2 11 * + STOP Mode
mbed_official 157:90e3acc479a2 12 * + AutoBaudRate
mbed_official 157:90e3acc479a2 13 * + Data transfers
mbed_official 157:90e3acc479a2 14 * + Multi-Processor Communication
mbed_official 157:90e3acc479a2 15 * + LIN mode
mbed_official 157:90e3acc479a2 16 * + Half-duplex mode
mbed_official 157:90e3acc479a2 17 * + Smartcard mode
mbed_official 157:90e3acc479a2 18 * + IrDA mode
mbed_official 157:90e3acc479a2 19 * + RS485 mode
mbed_official 157:90e3acc479a2 20 * + DMA transfers management
mbed_official 157:90e3acc479a2 21 * + Interrupts and flags management
mbed_official 157:90e3acc479a2 22 *
mbed_official 157:90e3acc479a2 23 * @verbatim
mbed_official 157:90e3acc479a2 24 ===============================================================================
mbed_official 157:90e3acc479a2 25 ##### How to use this driver #####
mbed_official 157:90e3acc479a2 26 ===============================================================================
mbed_official 157:90e3acc479a2 27 [..]
mbed_official 157:90e3acc479a2 28 (#) Enable peripheral clock using RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE)
mbed_official 157:90e3acc479a2 29 function for USART1 or using RCC_APB1PeriphClockCmd(RCC_APB1Periph_USARTx, ENABLE)
mbed_official 157:90e3acc479a2 30 function for USART2, USART3, UART4 and UART5.
mbed_official 157:90e3acc479a2 31 (#) According to the USART mode, enable the GPIO clocks using
mbed_official 157:90e3acc479a2 32 RCC_AHBPeriphClockCmd() function. (The I/O can be TX, RX, CTS,
mbed_official 157:90e3acc479a2 33 or and SCLK).
mbed_official 157:90e3acc479a2 34 (#) Peripheral's alternate function:
mbed_official 157:90e3acc479a2 35 (++) Connect the pin to the desired peripherals' Alternate
mbed_official 157:90e3acc479a2 36 Function (AF) using GPIO_PinAFConfig() function.
mbed_official 157:90e3acc479a2 37 (++) Configure the desired pin in alternate function by:
mbed_official 157:90e3acc479a2 38 GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AF.
mbed_official 157:90e3acc479a2 39 (++) Select the type, pull-up/pull-down and output speed via
mbed_official 157:90e3acc479a2 40 GPIO_PuPd, GPIO_OType and GPIO_Speed members.
mbed_official 157:90e3acc479a2 41 (++) Call GPIO_Init() function.
mbed_official 157:90e3acc479a2 42 (#) Program the Baud Rate, Word Length , Stop Bit, Parity, Hardware
mbed_official 157:90e3acc479a2 43 flow control and Mode(Receiver/Transmitter) using the SPI_Init()
mbed_official 157:90e3acc479a2 44 function.
mbed_official 157:90e3acc479a2 45 (#) For synchronous mode, enable the clock and program the polarity,
mbed_official 157:90e3acc479a2 46 phase and last bit using the USART_ClockInit() function.
mbed_official 157:90e3acc479a2 47 (#) Enable the USART using the USART_Cmd() function.
mbed_official 157:90e3acc479a2 48 (#) Enable the NVIC and the corresponding interrupt using the function
mbed_official 157:90e3acc479a2 49 USART_ITConfig() if you need to use interrupt mode.
mbed_official 157:90e3acc479a2 50 (#) When using the DMA mode:
mbed_official 157:90e3acc479a2 51 (++) Configure the DMA using DMA_Init() function.
mbed_official 157:90e3acc479a2 52 (++) Activate the needed channel Request using USART_DMACmd() function.
mbed_official 157:90e3acc479a2 53 (#) Enable the DMA using the DMA_Cmd() function, when using DMA mode.
mbed_official 157:90e3acc479a2 54 [..]
mbed_official 157:90e3acc479a2 55 Refer to Multi-Processor, LIN, half-duplex, Smartcard, IrDA sub-sections
mbed_official 157:90e3acc479a2 56 for more details.
mbed_official 157:90e3acc479a2 57
mbed_official 157:90e3acc479a2 58 @endverbatim
mbed_official 157:90e3acc479a2 59
mbed_official 157:90e3acc479a2 60 ******************************************************************************
mbed_official 157:90e3acc479a2 61 * @attention
mbed_official 157:90e3acc479a2 62 *
mbed_official 157:90e3acc479a2 63 * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
mbed_official 157:90e3acc479a2 64 *
mbed_official 157:90e3acc479a2 65 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 157:90e3acc479a2 66 * are permitted provided that the following conditions are met:
mbed_official 157:90e3acc479a2 67 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 157:90e3acc479a2 68 * this list of conditions and the following disclaimer.
mbed_official 157:90e3acc479a2 69 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 157:90e3acc479a2 70 * this list of conditions and the following disclaimer in the documentation
mbed_official 157:90e3acc479a2 71 * and/or other materials provided with the distribution.
mbed_official 157:90e3acc479a2 72 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 157:90e3acc479a2 73 * may be used to endorse or promote products derived from this software
mbed_official 157:90e3acc479a2 74 * without specific prior written permission.
mbed_official 157:90e3acc479a2 75 *
mbed_official 157:90e3acc479a2 76 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 157:90e3acc479a2 77 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 157:90e3acc479a2 78 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 157:90e3acc479a2 79 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 157:90e3acc479a2 80 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 157:90e3acc479a2 81 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 157:90e3acc479a2 82 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 157:90e3acc479a2 83 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 157:90e3acc479a2 84 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 157:90e3acc479a2 85 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 157:90e3acc479a2 86 *
mbed_official 157:90e3acc479a2 87 ******************************************************************************
mbed_official 157:90e3acc479a2 88 */
mbed_official 157:90e3acc479a2 89
mbed_official 157:90e3acc479a2 90 /* Includes ------------------------------------------------------------------*/
mbed_official 157:90e3acc479a2 91 #include "stm32f30x_usart.h"
mbed_official 157:90e3acc479a2 92 #include "stm32f30x_rcc.h"
mbed_official 157:90e3acc479a2 93
mbed_official 157:90e3acc479a2 94 /** @addtogroup STM32F30x_StdPeriph_Driver
mbed_official 157:90e3acc479a2 95 * @{
mbed_official 157:90e3acc479a2 96 */
mbed_official 157:90e3acc479a2 97
mbed_official 157:90e3acc479a2 98 /** @defgroup USART
mbed_official 157:90e3acc479a2 99 * @brief USART driver modules
mbed_official 157:90e3acc479a2 100 * @{
mbed_official 157:90e3acc479a2 101 */
mbed_official 157:90e3acc479a2 102
mbed_official 157:90e3acc479a2 103 /* Private typedef -----------------------------------------------------------*/
mbed_official 157:90e3acc479a2 104 /* Private define ------------------------------------------------------------*/
mbed_official 157:90e3acc479a2 105
mbed_official 157:90e3acc479a2 106 /*!< USART CR1 register clear Mask ((~(uint32_t)0xFFFFE6F3)) */
mbed_official 157:90e3acc479a2 107 #define CR1_CLEAR_MASK ((uint32_t)(USART_CR1_M | USART_CR1_PCE | \
mbed_official 157:90e3acc479a2 108 USART_CR1_PS | USART_CR1_TE | \
mbed_official 157:90e3acc479a2 109 USART_CR1_RE))
mbed_official 157:90e3acc479a2 110
mbed_official 157:90e3acc479a2 111 /*!< USART CR2 register clock bits clear Mask ((~(uint32_t)0xFFFFF0FF)) */
mbed_official 157:90e3acc479a2 112 #define CR2_CLOCK_CLEAR_MASK ((uint32_t)(USART_CR2_CLKEN | USART_CR2_CPOL | \
mbed_official 157:90e3acc479a2 113 USART_CR2_CPHA | USART_CR2_LBCL))
mbed_official 157:90e3acc479a2 114
mbed_official 157:90e3acc479a2 115 /*!< USART CR3 register clear Mask ((~(uint32_t)0xFFFFFCFF)) */
mbed_official 157:90e3acc479a2 116 #define CR3_CLEAR_MASK ((uint32_t)(USART_CR3_RTSE | USART_CR3_CTSE))
mbed_official 157:90e3acc479a2 117
mbed_official 157:90e3acc479a2 118 /*!< USART Interrupts mask */
mbed_official 157:90e3acc479a2 119 #define IT_MASK ((uint32_t)0x000000FF)
mbed_official 157:90e3acc479a2 120
mbed_official 157:90e3acc479a2 121 /* Private macro -------------------------------------------------------------*/
mbed_official 157:90e3acc479a2 122 /* Private variables ---------------------------------------------------------*/
mbed_official 157:90e3acc479a2 123 /* Private function prototypes -----------------------------------------------*/
mbed_official 157:90e3acc479a2 124 /* Private functions ---------------------------------------------------------*/
mbed_official 157:90e3acc479a2 125
mbed_official 157:90e3acc479a2 126 /** @defgroup USART_Private_Functions
mbed_official 157:90e3acc479a2 127 * @{
mbed_official 157:90e3acc479a2 128 */
mbed_official 157:90e3acc479a2 129
mbed_official 157:90e3acc479a2 130 /** @defgroup USART_Group1 Initialization and Configuration functions
mbed_official 157:90e3acc479a2 131 * @brief Initialization and Configuration functions
mbed_official 157:90e3acc479a2 132 *
mbed_official 157:90e3acc479a2 133 @verbatim
mbed_official 157:90e3acc479a2 134 ===============================================================================
mbed_official 157:90e3acc479a2 135 ##### Initialization and Configuration functions #####
mbed_official 157:90e3acc479a2 136 ===============================================================================
mbed_official 157:90e3acc479a2 137 [..]
mbed_official 157:90e3acc479a2 138 This subsection provides a set of functions allowing to initialize the USART
mbed_official 157:90e3acc479a2 139 in asynchronous and in synchronous modes.
mbed_official 157:90e3acc479a2 140 (+) For the asynchronous mode only these parameters can be configured:
mbed_official 157:90e3acc479a2 141 (++) Baud Rate.
mbed_official 157:90e3acc479a2 142 (++) Word Length.
mbed_official 157:90e3acc479a2 143 (++) Stop Bit.
mbed_official 157:90e3acc479a2 144 (++) Parity: If the parity is enabled, then the MSB bit of the data written
mbed_official 157:90e3acc479a2 145 in the data register is transmitted but is changed by the parity bit.
mbed_official 157:90e3acc479a2 146 Depending on the frame length defined by the M bit (8-bits or 9-bits),
mbed_official 157:90e3acc479a2 147 the possible USART frame formats are as listed in the following table:
mbed_official 157:90e3acc479a2 148 [..]
mbed_official 157:90e3acc479a2 149 +-------------------------------------------------------------+
mbed_official 157:90e3acc479a2 150 | M bit | PCE bit | USART frame |
mbed_official 157:90e3acc479a2 151 |---------------------|---------------------------------------|
mbed_official 157:90e3acc479a2 152 | 0 | 0 | | SB | 8 bit data | STB | |
mbed_official 157:90e3acc479a2 153 |---------|-----------|---------------------------------------|
mbed_official 157:90e3acc479a2 154 | 0 | 1 | | SB | 7 bit data | PB | STB | |
mbed_official 157:90e3acc479a2 155 |---------|-----------|---------------------------------------|
mbed_official 157:90e3acc479a2 156 | 1 | 0 | | SB | 9 bit data | STB | |
mbed_official 157:90e3acc479a2 157 |---------|-----------|---------------------------------------|
mbed_official 157:90e3acc479a2 158 | 1 | 1 | | SB | 8 bit data | PB | STB | |
mbed_official 157:90e3acc479a2 159 +-------------------------------------------------------------+
mbed_official 157:90e3acc479a2 160 [..]
mbed_official 157:90e3acc479a2 161 (++) Hardware flow control.
mbed_official 157:90e3acc479a2 162 (++) Receiver/transmitter modes.
mbed_official 157:90e3acc479a2 163 [..] The USART_Init() function follows the USART asynchronous configuration
mbed_official 157:90e3acc479a2 164 procedure(details for the procedure are available in reference manual.
mbed_official 157:90e3acc479a2 165 (+) For the synchronous mode in addition to the asynchronous mode parameters
mbed_official 157:90e3acc479a2 166 these parameters should be also configured:
mbed_official 157:90e3acc479a2 167 (++) USART Clock Enabled.
mbed_official 157:90e3acc479a2 168 (++) USART polarity.
mbed_official 157:90e3acc479a2 169 (++) USART phase.
mbed_official 157:90e3acc479a2 170 (++) USART LastBit.
mbed_official 157:90e3acc479a2 171 [..] These parameters can be configured using the USART_ClockInit() function.
mbed_official 157:90e3acc479a2 172
mbed_official 157:90e3acc479a2 173 @endverbatim
mbed_official 157:90e3acc479a2 174 * @{
mbed_official 157:90e3acc479a2 175 */
mbed_official 157:90e3acc479a2 176
mbed_official 157:90e3acc479a2 177 /**
mbed_official 157:90e3acc479a2 178 * @brief Deinitializes the USARTx peripheral registers to their default reset values.
mbed_official 157:90e3acc479a2 179 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 180 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 181 * @retval None
mbed_official 157:90e3acc479a2 182 */
mbed_official 157:90e3acc479a2 183 void USART_DeInit(USART_TypeDef* USARTx)
mbed_official 157:90e3acc479a2 184 {
mbed_official 157:90e3acc479a2 185 /* Check the parameters */
mbed_official 157:90e3acc479a2 186 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 187
mbed_official 157:90e3acc479a2 188 if (USARTx == USART1)
mbed_official 157:90e3acc479a2 189 {
mbed_official 157:90e3acc479a2 190 RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, ENABLE);
mbed_official 157:90e3acc479a2 191 RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, DISABLE);
mbed_official 157:90e3acc479a2 192 }
mbed_official 157:90e3acc479a2 193 else if (USARTx == USART2)
mbed_official 157:90e3acc479a2 194 {
mbed_official 157:90e3acc479a2 195 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, ENABLE);
mbed_official 157:90e3acc479a2 196 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, DISABLE);
mbed_official 157:90e3acc479a2 197 }
mbed_official 157:90e3acc479a2 198 else if (USARTx == USART3)
mbed_official 157:90e3acc479a2 199 {
mbed_official 157:90e3acc479a2 200 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, ENABLE);
mbed_official 157:90e3acc479a2 201 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, DISABLE);
mbed_official 157:90e3acc479a2 202 }
mbed_official 157:90e3acc479a2 203 else if (USARTx == UART4)
mbed_official 157:90e3acc479a2 204 {
mbed_official 157:90e3acc479a2 205 RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART4, ENABLE);
mbed_official 157:90e3acc479a2 206 RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART4, DISABLE);
mbed_official 157:90e3acc479a2 207 }
mbed_official 157:90e3acc479a2 208 else
mbed_official 157:90e3acc479a2 209 {
mbed_official 157:90e3acc479a2 210 if (USARTx == UART5)
mbed_official 157:90e3acc479a2 211 {
mbed_official 157:90e3acc479a2 212 RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART5, ENABLE);
mbed_official 157:90e3acc479a2 213 RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART5, DISABLE);
mbed_official 157:90e3acc479a2 214 }
mbed_official 157:90e3acc479a2 215 }
mbed_official 157:90e3acc479a2 216 }
mbed_official 157:90e3acc479a2 217
mbed_official 157:90e3acc479a2 218 /**
mbed_official 157:90e3acc479a2 219 * @brief Initializes the USARTx peripheral according to the specified
mbed_official 157:90e3acc479a2 220 * parameters in the USART_InitStruct .
mbed_official 157:90e3acc479a2 221 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 222 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 223 * @param USART_InitStruct: pointer to a USART_InitTypeDef structure
mbed_official 157:90e3acc479a2 224 * that contains the configuration information for the specified USART peripheral.
mbed_official 157:90e3acc479a2 225 * @retval None
mbed_official 157:90e3acc479a2 226 */
mbed_official 157:90e3acc479a2 227 void USART_Init(USART_TypeDef* USARTx, USART_InitTypeDef* USART_InitStruct)
mbed_official 157:90e3acc479a2 228 {
mbed_official 157:90e3acc479a2 229 uint32_t divider = 0, apbclock = 0, tmpreg = 0;
mbed_official 157:90e3acc479a2 230 RCC_ClocksTypeDef RCC_ClocksStatus;
mbed_official 157:90e3acc479a2 231
mbed_official 157:90e3acc479a2 232 /* Check the parameters */
mbed_official 157:90e3acc479a2 233 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 234 assert_param(IS_USART_BAUDRATE(USART_InitStruct->USART_BaudRate));
mbed_official 157:90e3acc479a2 235 assert_param(IS_USART_WORD_LENGTH(USART_InitStruct->USART_WordLength));
mbed_official 157:90e3acc479a2 236 assert_param(IS_USART_STOPBITS(USART_InitStruct->USART_StopBits));
mbed_official 157:90e3acc479a2 237 assert_param(IS_USART_PARITY(USART_InitStruct->USART_Parity));
mbed_official 157:90e3acc479a2 238 assert_param(IS_USART_MODE(USART_InitStruct->USART_Mode));
mbed_official 157:90e3acc479a2 239 assert_param(IS_USART_HARDWARE_FLOW_CONTROL(USART_InitStruct->USART_HardwareFlowControl));
mbed_official 157:90e3acc479a2 240
mbed_official 157:90e3acc479a2 241 /* Disable USART */
mbed_official 157:90e3acc479a2 242 USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_UE);
mbed_official 157:90e3acc479a2 243
mbed_official 157:90e3acc479a2 244 /*---------------------------- USART CR2 Configuration -----------------------*/
mbed_official 157:90e3acc479a2 245 tmpreg = USARTx->CR2;
mbed_official 157:90e3acc479a2 246 /* Clear STOP[13:12] bits */
mbed_official 157:90e3acc479a2 247 tmpreg &= (uint32_t)~((uint32_t)USART_CR2_STOP);
mbed_official 157:90e3acc479a2 248
mbed_official 157:90e3acc479a2 249 /* Configure the USART Stop Bits, Clock, CPOL, CPHA and LastBit ------------*/
mbed_official 157:90e3acc479a2 250 /* Set STOP[13:12] bits according to USART_StopBits value */
mbed_official 157:90e3acc479a2 251 tmpreg |= (uint32_t)USART_InitStruct->USART_StopBits;
mbed_official 157:90e3acc479a2 252
mbed_official 157:90e3acc479a2 253 /* Write to USART CR2 */
mbed_official 157:90e3acc479a2 254 USARTx->CR2 = tmpreg;
mbed_official 157:90e3acc479a2 255
mbed_official 157:90e3acc479a2 256 /*---------------------------- USART CR1 Configuration -----------------------*/
mbed_official 157:90e3acc479a2 257 tmpreg = USARTx->CR1;
mbed_official 157:90e3acc479a2 258 /* Clear M, PCE, PS, TE and RE bits */
mbed_official 157:90e3acc479a2 259 tmpreg &= (uint32_t)~((uint32_t)CR1_CLEAR_MASK);
mbed_official 157:90e3acc479a2 260
mbed_official 157:90e3acc479a2 261 /* Configure the USART Word Length, Parity and mode ----------------------- */
mbed_official 157:90e3acc479a2 262 /* Set the M bits according to USART_WordLength value */
mbed_official 157:90e3acc479a2 263 /* Set PCE and PS bits according to USART_Parity value */
mbed_official 157:90e3acc479a2 264 /* Set TE and RE bits according to USART_Mode value */
mbed_official 157:90e3acc479a2 265 tmpreg |= (uint32_t)USART_InitStruct->USART_WordLength | USART_InitStruct->USART_Parity |
mbed_official 157:90e3acc479a2 266 USART_InitStruct->USART_Mode;
mbed_official 157:90e3acc479a2 267
mbed_official 157:90e3acc479a2 268 /* Write to USART CR1 */
mbed_official 157:90e3acc479a2 269 USARTx->CR1 = tmpreg;
mbed_official 157:90e3acc479a2 270
mbed_official 157:90e3acc479a2 271 /*---------------------------- USART CR3 Configuration -----------------------*/
mbed_official 157:90e3acc479a2 272 tmpreg = USARTx->CR3;
mbed_official 157:90e3acc479a2 273 /* Clear CTSE and RTSE bits */
mbed_official 157:90e3acc479a2 274 tmpreg &= (uint32_t)~((uint32_t)CR3_CLEAR_MASK);
mbed_official 157:90e3acc479a2 275
mbed_official 157:90e3acc479a2 276 /* Configure the USART HFC -------------------------------------------------*/
mbed_official 157:90e3acc479a2 277 /* Set CTSE and RTSE bits according to USART_HardwareFlowControl value */
mbed_official 157:90e3acc479a2 278 tmpreg |= USART_InitStruct->USART_HardwareFlowControl;
mbed_official 157:90e3acc479a2 279
mbed_official 157:90e3acc479a2 280 /* Write to USART CR3 */
mbed_official 157:90e3acc479a2 281 USARTx->CR3 = tmpreg;
mbed_official 157:90e3acc479a2 282
mbed_official 157:90e3acc479a2 283 /*---------------------------- USART BRR Configuration -----------------------*/
mbed_official 157:90e3acc479a2 284 /* Configure the USART Baud Rate -------------------------------------------*/
mbed_official 157:90e3acc479a2 285 RCC_GetClocksFreq(&RCC_ClocksStatus);
mbed_official 157:90e3acc479a2 286
mbed_official 157:90e3acc479a2 287 if (USARTx == USART1)
mbed_official 157:90e3acc479a2 288 {
mbed_official 157:90e3acc479a2 289 apbclock = RCC_ClocksStatus.USART1CLK_Frequency;
mbed_official 157:90e3acc479a2 290 }
mbed_official 157:90e3acc479a2 291 else if (USARTx == USART2)
mbed_official 157:90e3acc479a2 292 {
mbed_official 157:90e3acc479a2 293 apbclock = RCC_ClocksStatus.USART2CLK_Frequency;
mbed_official 157:90e3acc479a2 294 }
mbed_official 157:90e3acc479a2 295 else if (USARTx == USART3)
mbed_official 157:90e3acc479a2 296 {
mbed_official 157:90e3acc479a2 297 apbclock = RCC_ClocksStatus.USART3CLK_Frequency;
mbed_official 157:90e3acc479a2 298 }
mbed_official 157:90e3acc479a2 299 else if (USARTx == UART4)
mbed_official 157:90e3acc479a2 300 {
mbed_official 157:90e3acc479a2 301 apbclock = RCC_ClocksStatus.UART4CLK_Frequency;
mbed_official 157:90e3acc479a2 302 }
mbed_official 157:90e3acc479a2 303 else
mbed_official 157:90e3acc479a2 304 {
mbed_official 157:90e3acc479a2 305 apbclock = RCC_ClocksStatus.UART5CLK_Frequency;
mbed_official 157:90e3acc479a2 306 }
mbed_official 157:90e3acc479a2 307
mbed_official 157:90e3acc479a2 308 /* Determine the integer part */
mbed_official 157:90e3acc479a2 309 if ((USARTx->CR1 & USART_CR1_OVER8) != 0)
mbed_official 157:90e3acc479a2 310 {
mbed_official 157:90e3acc479a2 311 /* (divider * 10) computing in case Oversampling mode is 8 Samples */
mbed_official 157:90e3acc479a2 312 divider = (uint32_t)((2 * apbclock) / (USART_InitStruct->USART_BaudRate));
mbed_official 157:90e3acc479a2 313 tmpreg = (uint32_t)((2 * apbclock) % (USART_InitStruct->USART_BaudRate));
mbed_official 157:90e3acc479a2 314 }
mbed_official 157:90e3acc479a2 315 else /* if ((USARTx->CR1 & CR1_OVER8_Set) == 0) */
mbed_official 157:90e3acc479a2 316 {
mbed_official 157:90e3acc479a2 317 /* (divider * 10) computing in case Oversampling mode is 16 Samples */
mbed_official 157:90e3acc479a2 318 divider = (uint32_t)((apbclock) / (USART_InitStruct->USART_BaudRate));
mbed_official 157:90e3acc479a2 319 tmpreg = (uint32_t)((apbclock) % (USART_InitStruct->USART_BaudRate));
mbed_official 157:90e3acc479a2 320 }
mbed_official 157:90e3acc479a2 321
mbed_official 157:90e3acc479a2 322 /* round the divider : if fractional part i greater than 0.5 increment divider */
mbed_official 157:90e3acc479a2 323 if (tmpreg >= (USART_InitStruct->USART_BaudRate) / 2)
mbed_official 157:90e3acc479a2 324 {
mbed_official 157:90e3acc479a2 325 divider++;
mbed_official 157:90e3acc479a2 326 }
mbed_official 157:90e3acc479a2 327
mbed_official 157:90e3acc479a2 328 /* Implement the divider in case Oversampling mode is 8 Samples */
mbed_official 157:90e3acc479a2 329 if ((USARTx->CR1 & USART_CR1_OVER8) != 0)
mbed_official 157:90e3acc479a2 330 {
mbed_official 157:90e3acc479a2 331 /* get the LSB of divider and shift it to the right by 1 bit */
mbed_official 157:90e3acc479a2 332 tmpreg = (divider & (uint16_t)0x000F) >> 1;
mbed_official 157:90e3acc479a2 333
mbed_official 157:90e3acc479a2 334 /* update the divider value */
mbed_official 157:90e3acc479a2 335 divider = (divider & (uint16_t)0xFFF0) | tmpreg;
mbed_official 157:90e3acc479a2 336 }
mbed_official 157:90e3acc479a2 337
mbed_official 157:90e3acc479a2 338 /* Write to USART BRR */
mbed_official 157:90e3acc479a2 339 USARTx->BRR = (uint16_t)divider;
mbed_official 157:90e3acc479a2 340 }
mbed_official 157:90e3acc479a2 341
mbed_official 157:90e3acc479a2 342 /**
mbed_official 157:90e3acc479a2 343 * @brief Fills each USART_InitStruct member with its default value.
mbed_official 157:90e3acc479a2 344 * @param USART_InitStruct: pointer to a USART_InitTypeDef structure
mbed_official 157:90e3acc479a2 345 * which will be initialized.
mbed_official 157:90e3acc479a2 346 * @retval None
mbed_official 157:90e3acc479a2 347 */
mbed_official 157:90e3acc479a2 348 void USART_StructInit(USART_InitTypeDef* USART_InitStruct)
mbed_official 157:90e3acc479a2 349 {
mbed_official 157:90e3acc479a2 350 /* USART_InitStruct members default value */
mbed_official 157:90e3acc479a2 351 USART_InitStruct->USART_BaudRate = 9600;
mbed_official 157:90e3acc479a2 352 USART_InitStruct->USART_WordLength = USART_WordLength_8b;
mbed_official 157:90e3acc479a2 353 USART_InitStruct->USART_StopBits = USART_StopBits_1;
mbed_official 157:90e3acc479a2 354 USART_InitStruct->USART_Parity = USART_Parity_No ;
mbed_official 157:90e3acc479a2 355 USART_InitStruct->USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
mbed_official 157:90e3acc479a2 356 USART_InitStruct->USART_HardwareFlowControl = USART_HardwareFlowControl_None;
mbed_official 157:90e3acc479a2 357 }
mbed_official 157:90e3acc479a2 358
mbed_official 157:90e3acc479a2 359 /**
mbed_official 157:90e3acc479a2 360 * @brief Initializes the USARTx peripheral Clock according to the
mbed_official 157:90e3acc479a2 361 * specified parameters in the USART_ClockInitStruct.
mbed_official 157:90e3acc479a2 362 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 363 * following values: USART1 or USART2 or USART3.
mbed_official 157:90e3acc479a2 364 * @param USART_ClockInitStruct: pointer to a USART_ClockInitTypeDef
mbed_official 157:90e3acc479a2 365 * structure that contains the configuration information for the specified
mbed_official 157:90e3acc479a2 366 * USART peripheral.
mbed_official 157:90e3acc479a2 367 * @retval None
mbed_official 157:90e3acc479a2 368 */
mbed_official 157:90e3acc479a2 369 void USART_ClockInit(USART_TypeDef* USARTx, USART_ClockInitTypeDef* USART_ClockInitStruct)
mbed_official 157:90e3acc479a2 370 {
mbed_official 157:90e3acc479a2 371 uint32_t tmpreg = 0;
mbed_official 157:90e3acc479a2 372 /* Check the parameters */
mbed_official 157:90e3acc479a2 373 assert_param(IS_USART_123_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 374 assert_param(IS_USART_CLOCK(USART_ClockInitStruct->USART_Clock));
mbed_official 157:90e3acc479a2 375 assert_param(IS_USART_CPOL(USART_ClockInitStruct->USART_CPOL));
mbed_official 157:90e3acc479a2 376 assert_param(IS_USART_CPHA(USART_ClockInitStruct->USART_CPHA));
mbed_official 157:90e3acc479a2 377 assert_param(IS_USART_LASTBIT(USART_ClockInitStruct->USART_LastBit));
mbed_official 157:90e3acc479a2 378 /*---------------------------- USART CR2 Configuration -----------------------*/
mbed_official 157:90e3acc479a2 379 tmpreg = USARTx->CR2;
mbed_official 157:90e3acc479a2 380 /* Clear CLKEN, CPOL, CPHA, LBCL and SSM bits */
mbed_official 157:90e3acc479a2 381 tmpreg &= (uint32_t)~((uint32_t)CR2_CLOCK_CLEAR_MASK);
mbed_official 157:90e3acc479a2 382 /* Configure the USART Clock, CPOL, CPHA, LastBit and SSM ------------*/
mbed_official 157:90e3acc479a2 383 /* Set CLKEN bit according to USART_Clock value */
mbed_official 157:90e3acc479a2 384 /* Set CPOL bit according to USART_CPOL value */
mbed_official 157:90e3acc479a2 385 /* Set CPHA bit according to USART_CPHA value */
mbed_official 157:90e3acc479a2 386 /* Set LBCL bit according to USART_LastBit value */
mbed_official 157:90e3acc479a2 387 tmpreg |= (uint32_t)(USART_ClockInitStruct->USART_Clock | USART_ClockInitStruct->USART_CPOL |
mbed_official 157:90e3acc479a2 388 USART_ClockInitStruct->USART_CPHA | USART_ClockInitStruct->USART_LastBit);
mbed_official 157:90e3acc479a2 389 /* Write to USART CR2 */
mbed_official 157:90e3acc479a2 390 USARTx->CR2 = tmpreg;
mbed_official 157:90e3acc479a2 391 }
mbed_official 157:90e3acc479a2 392
mbed_official 157:90e3acc479a2 393 /**
mbed_official 157:90e3acc479a2 394 * @brief Fills each USART_ClockInitStruct member with its default value.
mbed_official 157:90e3acc479a2 395 * @param USART_ClockInitStruct: pointer to a USART_ClockInitTypeDef
mbed_official 157:90e3acc479a2 396 * structure which will be initialized.
mbed_official 157:90e3acc479a2 397 * @retval None
mbed_official 157:90e3acc479a2 398 */
mbed_official 157:90e3acc479a2 399 void USART_ClockStructInit(USART_ClockInitTypeDef* USART_ClockInitStruct)
mbed_official 157:90e3acc479a2 400 {
mbed_official 157:90e3acc479a2 401 /* USART_ClockInitStruct members default value */
mbed_official 157:90e3acc479a2 402 USART_ClockInitStruct->USART_Clock = USART_Clock_Disable;
mbed_official 157:90e3acc479a2 403 USART_ClockInitStruct->USART_CPOL = USART_CPOL_Low;
mbed_official 157:90e3acc479a2 404 USART_ClockInitStruct->USART_CPHA = USART_CPHA_1Edge;
mbed_official 157:90e3acc479a2 405 USART_ClockInitStruct->USART_LastBit = USART_LastBit_Disable;
mbed_official 157:90e3acc479a2 406 }
mbed_official 157:90e3acc479a2 407
mbed_official 157:90e3acc479a2 408 /**
mbed_official 157:90e3acc479a2 409 * @brief Enables or disables the specified USART peripheral.
mbed_official 157:90e3acc479a2 410 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 411 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 412 * @param NewState: new state of the USARTx peripheral.
mbed_official 157:90e3acc479a2 413 * This parameter can be: ENABLE or DISABLE.
mbed_official 157:90e3acc479a2 414 * @retval None
mbed_official 157:90e3acc479a2 415 */
mbed_official 157:90e3acc479a2 416 void USART_Cmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 157:90e3acc479a2 417 {
mbed_official 157:90e3acc479a2 418 /* Check the parameters */
mbed_official 157:90e3acc479a2 419 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 420 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 157:90e3acc479a2 421
mbed_official 157:90e3acc479a2 422 if (NewState != DISABLE)
mbed_official 157:90e3acc479a2 423 {
mbed_official 157:90e3acc479a2 424 /* Enable the selected USART by setting the UE bit in the CR1 register */
mbed_official 157:90e3acc479a2 425 USARTx->CR1 |= USART_CR1_UE;
mbed_official 157:90e3acc479a2 426 }
mbed_official 157:90e3acc479a2 427 else
mbed_official 157:90e3acc479a2 428 {
mbed_official 157:90e3acc479a2 429 /* Disable the selected USART by clearing the UE bit in the CR1 register */
mbed_official 157:90e3acc479a2 430 USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_UE);
mbed_official 157:90e3acc479a2 431 }
mbed_official 157:90e3acc479a2 432 }
mbed_official 157:90e3acc479a2 433
mbed_official 157:90e3acc479a2 434 /**
mbed_official 157:90e3acc479a2 435 * @brief Enables or disables the USART's transmitter or receiver.
mbed_official 157:90e3acc479a2 436 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 437 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 438 * @param USART_Direction: specifies the USART direction.
mbed_official 157:90e3acc479a2 439 * This parameter can be any combination of the following values:
mbed_official 157:90e3acc479a2 440 * @arg USART_Mode_Tx: USART Transmitter
mbed_official 157:90e3acc479a2 441 * @arg USART_Mode_Rx: USART Receiver
mbed_official 157:90e3acc479a2 442 * @param NewState: new state of the USART transfer direction.
mbed_official 157:90e3acc479a2 443 * This parameter can be: ENABLE or DISABLE.
mbed_official 157:90e3acc479a2 444 * @retval None
mbed_official 157:90e3acc479a2 445 */
mbed_official 157:90e3acc479a2 446 void USART_DirectionModeCmd(USART_TypeDef* USARTx, uint32_t USART_DirectionMode, FunctionalState NewState)
mbed_official 157:90e3acc479a2 447 {
mbed_official 157:90e3acc479a2 448 /* Check the parameters */
mbed_official 157:90e3acc479a2 449 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 450 assert_param(IS_USART_MODE(USART_DirectionMode));
mbed_official 157:90e3acc479a2 451 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 157:90e3acc479a2 452
mbed_official 157:90e3acc479a2 453 if (NewState != DISABLE)
mbed_official 157:90e3acc479a2 454 {
mbed_official 157:90e3acc479a2 455 /* Enable the USART's transfer interface by setting the TE and/or RE bits
mbed_official 157:90e3acc479a2 456 in the USART CR1 register */
mbed_official 157:90e3acc479a2 457 USARTx->CR1 |= USART_DirectionMode;
mbed_official 157:90e3acc479a2 458 }
mbed_official 157:90e3acc479a2 459 else
mbed_official 157:90e3acc479a2 460 {
mbed_official 157:90e3acc479a2 461 /* Disable the USART's transfer interface by clearing the TE and/or RE bits
mbed_official 157:90e3acc479a2 462 in the USART CR3 register */
mbed_official 157:90e3acc479a2 463 USARTx->CR1 &= (uint32_t)~USART_DirectionMode;
mbed_official 157:90e3acc479a2 464 }
mbed_official 157:90e3acc479a2 465 }
mbed_official 157:90e3acc479a2 466
mbed_official 157:90e3acc479a2 467 /**
mbed_official 157:90e3acc479a2 468 * @brief Enables or disables the USART's 8x oversampling mode.
mbed_official 157:90e3acc479a2 469 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 470 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 471 * @param NewState: new state of the USART 8x oversampling mode.
mbed_official 157:90e3acc479a2 472 * This parameter can be: ENABLE or DISABLE.
mbed_official 157:90e3acc479a2 473 * @note
mbed_official 157:90e3acc479a2 474 * This function has to be called before calling USART_Init()
mbed_official 157:90e3acc479a2 475 * function in order to have correct baudrate Divider value.
mbed_official 157:90e3acc479a2 476 * @retval None
mbed_official 157:90e3acc479a2 477 */
mbed_official 157:90e3acc479a2 478 void USART_OverSampling8Cmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 157:90e3acc479a2 479 {
mbed_official 157:90e3acc479a2 480 /* Check the parameters */
mbed_official 157:90e3acc479a2 481 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 482 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 157:90e3acc479a2 483
mbed_official 157:90e3acc479a2 484 if (NewState != DISABLE)
mbed_official 157:90e3acc479a2 485 {
mbed_official 157:90e3acc479a2 486 /* Enable the 8x Oversampling mode by setting the OVER8 bit in the CR1 register */
mbed_official 157:90e3acc479a2 487 USARTx->CR1 |= USART_CR1_OVER8;
mbed_official 157:90e3acc479a2 488 }
mbed_official 157:90e3acc479a2 489 else
mbed_official 157:90e3acc479a2 490 {
mbed_official 157:90e3acc479a2 491 /* Disable the 8x Oversampling mode by clearing the OVER8 bit in the CR1 register */
mbed_official 157:90e3acc479a2 492 USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_OVER8);
mbed_official 157:90e3acc479a2 493 }
mbed_official 157:90e3acc479a2 494 }
mbed_official 157:90e3acc479a2 495
mbed_official 157:90e3acc479a2 496 /**
mbed_official 157:90e3acc479a2 497 * @brief Enables or disables the USART's one bit sampling method.
mbed_official 157:90e3acc479a2 498 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 499 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 500 * @param NewState: new state of the USART one bit sampling method.
mbed_official 157:90e3acc479a2 501 * This parameter can be: ENABLE or DISABLE.
mbed_official 157:90e3acc479a2 502 * @note
mbed_official 157:90e3acc479a2 503 * This function has to be called before calling USART_Cmd() function.
mbed_official 157:90e3acc479a2 504 * @retval None
mbed_official 157:90e3acc479a2 505 */
mbed_official 157:90e3acc479a2 506 void USART_OneBitMethodCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 157:90e3acc479a2 507 {
mbed_official 157:90e3acc479a2 508 /* Check the parameters */
mbed_official 157:90e3acc479a2 509 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 510 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 157:90e3acc479a2 511
mbed_official 157:90e3acc479a2 512 if (NewState != DISABLE)
mbed_official 157:90e3acc479a2 513 {
mbed_official 157:90e3acc479a2 514 /* Enable the one bit method by setting the ONEBIT bit in the CR3 register */
mbed_official 157:90e3acc479a2 515 USARTx->CR3 |= USART_CR3_ONEBIT;
mbed_official 157:90e3acc479a2 516 }
mbed_official 157:90e3acc479a2 517 else
mbed_official 157:90e3acc479a2 518 {
mbed_official 157:90e3acc479a2 519 /* Disable the one bit method by clearing the ONEBIT bit in the CR3 register */
mbed_official 157:90e3acc479a2 520 USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_ONEBIT);
mbed_official 157:90e3acc479a2 521 }
mbed_official 157:90e3acc479a2 522 }
mbed_official 157:90e3acc479a2 523
mbed_official 157:90e3acc479a2 524 /**
mbed_official 157:90e3acc479a2 525 * @brief Enables or disables the USART's most significant bit first
mbed_official 157:90e3acc479a2 526 * transmitted/received following the start bit.
mbed_official 157:90e3acc479a2 527 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 528 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 529 * @param NewState: new state of the USART most significant bit first
mbed_official 157:90e3acc479a2 530 * transmitted/received following the start bit.
mbed_official 157:90e3acc479a2 531 * This parameter can be: ENABLE or DISABLE.
mbed_official 157:90e3acc479a2 532 * @note
mbed_official 157:90e3acc479a2 533 * This function has to be called before calling USART_Cmd() function.
mbed_official 157:90e3acc479a2 534 * @retval None
mbed_official 157:90e3acc479a2 535 */
mbed_official 157:90e3acc479a2 536 void USART_MSBFirstCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 157:90e3acc479a2 537 {
mbed_official 157:90e3acc479a2 538 /* Check the parameters */
mbed_official 157:90e3acc479a2 539 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 540 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 157:90e3acc479a2 541
mbed_official 157:90e3acc479a2 542 if (NewState != DISABLE)
mbed_official 157:90e3acc479a2 543 {
mbed_official 157:90e3acc479a2 544 /* Enable the most significant bit first transmitted/received following the
mbed_official 157:90e3acc479a2 545 start bit by setting the MSBFIRST bit in the CR2 register */
mbed_official 157:90e3acc479a2 546 USARTx->CR2 |= USART_CR2_MSBFIRST;
mbed_official 157:90e3acc479a2 547 }
mbed_official 157:90e3acc479a2 548 else
mbed_official 157:90e3acc479a2 549 {
mbed_official 157:90e3acc479a2 550 /* Disable the most significant bit first transmitted/received following the
mbed_official 157:90e3acc479a2 551 start bit by clearing the MSBFIRST bit in the CR2 register */
mbed_official 157:90e3acc479a2 552 USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_MSBFIRST);
mbed_official 157:90e3acc479a2 553 }
mbed_official 157:90e3acc479a2 554 }
mbed_official 157:90e3acc479a2 555
mbed_official 157:90e3acc479a2 556 /**
mbed_official 157:90e3acc479a2 557 * @brief Enables or disables the binary data inversion.
mbed_official 157:90e3acc479a2 558 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 559 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 560 * @param NewState: new defined levels for the USART data.
mbed_official 157:90e3acc479a2 561 * This parameter can be: ENABLE or DISABLE.
mbed_official 157:90e3acc479a2 562 * @arg ENABLE: Logical data from the data register are send/received in negative
mbed_official 157:90e3acc479a2 563 * logic. (1=L, 0=H). The parity bit is also inverted.
mbed_official 157:90e3acc479a2 564 * @arg DISABLE: Logical data from the data register are send/received in positive
mbed_official 157:90e3acc479a2 565 * logic. (1=H, 0=L)
mbed_official 157:90e3acc479a2 566 * @note
mbed_official 157:90e3acc479a2 567 * This function has to be called before calling USART_Cmd() function.
mbed_official 157:90e3acc479a2 568 * @retval None
mbed_official 157:90e3acc479a2 569 */
mbed_official 157:90e3acc479a2 570 void USART_DataInvCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 157:90e3acc479a2 571 {
mbed_official 157:90e3acc479a2 572 /* Check the parameters */
mbed_official 157:90e3acc479a2 573 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 574 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 157:90e3acc479a2 575
mbed_official 157:90e3acc479a2 576 if (NewState != DISABLE)
mbed_official 157:90e3acc479a2 577 {
mbed_official 157:90e3acc479a2 578 /* Enable the binary data inversion feature by setting the DATAINV bit in
mbed_official 157:90e3acc479a2 579 the CR2 register */
mbed_official 157:90e3acc479a2 580 USARTx->CR2 |= USART_CR2_DATAINV;
mbed_official 157:90e3acc479a2 581 }
mbed_official 157:90e3acc479a2 582 else
mbed_official 157:90e3acc479a2 583 {
mbed_official 157:90e3acc479a2 584 /* Disable the binary data inversion feature by clearing the DATAINV bit in
mbed_official 157:90e3acc479a2 585 the CR2 register */
mbed_official 157:90e3acc479a2 586 USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_DATAINV);
mbed_official 157:90e3acc479a2 587 }
mbed_official 157:90e3acc479a2 588 }
mbed_official 157:90e3acc479a2 589
mbed_official 157:90e3acc479a2 590 /**
mbed_official 157:90e3acc479a2 591 * @brief Enables or disables the Pin(s) active level inversion.
mbed_official 157:90e3acc479a2 592 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 593 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 594 * @param USART_InvPin: specifies the USART pin(s) to invert.
mbed_official 157:90e3acc479a2 595 * This parameter can be any combination of the following values:
mbed_official 157:90e3acc479a2 596 * @arg USART_InvPin_Tx: USART Tx pin active level inversion.
mbed_official 157:90e3acc479a2 597 * @arg USART_InvPin_Rx: USART Rx pin active level inversion.
mbed_official 157:90e3acc479a2 598 * @param NewState: new active level status for the USART pin(s).
mbed_official 157:90e3acc479a2 599 * This parameter can be: ENABLE or DISABLE.
mbed_official 157:90e3acc479a2 600 * - ENABLE: pin(s) signal values are inverted (Vdd =0, Gnd =1).
mbed_official 157:90e3acc479a2 601 * - DISABLE: pin(s) signal works using the standard logic levels (Vdd =1, Gnd =0).
mbed_official 157:90e3acc479a2 602 * @note
mbed_official 157:90e3acc479a2 603 * This function has to be called before calling USART_Cmd() function.
mbed_official 157:90e3acc479a2 604 * @retval None
mbed_official 157:90e3acc479a2 605 */
mbed_official 157:90e3acc479a2 606 void USART_InvPinCmd(USART_TypeDef* USARTx, uint32_t USART_InvPin, FunctionalState NewState)
mbed_official 157:90e3acc479a2 607 {
mbed_official 157:90e3acc479a2 608 /* Check the parameters */
mbed_official 157:90e3acc479a2 609 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 610 assert_param(IS_USART_INVERSTION_PIN(USART_InvPin));
mbed_official 157:90e3acc479a2 611 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 157:90e3acc479a2 612
mbed_official 157:90e3acc479a2 613 if (NewState != DISABLE)
mbed_official 157:90e3acc479a2 614 {
mbed_official 157:90e3acc479a2 615 /* Enable the active level inversion for selected pins by setting the TXINV
mbed_official 157:90e3acc479a2 616 and/or RXINV bits in the USART CR2 register */
mbed_official 157:90e3acc479a2 617 USARTx->CR2 |= USART_InvPin;
mbed_official 157:90e3acc479a2 618 }
mbed_official 157:90e3acc479a2 619 else
mbed_official 157:90e3acc479a2 620 {
mbed_official 157:90e3acc479a2 621 /* Disable the active level inversion for selected requests by clearing the
mbed_official 157:90e3acc479a2 622 TXINV and/or RXINV bits in the USART CR2 register */
mbed_official 157:90e3acc479a2 623 USARTx->CR2 &= (uint32_t)~USART_InvPin;
mbed_official 157:90e3acc479a2 624 }
mbed_official 157:90e3acc479a2 625 }
mbed_official 157:90e3acc479a2 626
mbed_official 157:90e3acc479a2 627 /**
mbed_official 157:90e3acc479a2 628 * @brief Enables or disables the swap Tx/Rx pins.
mbed_official 157:90e3acc479a2 629 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 630 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 631 * @param NewState: new state of the USARTx TX/RX pins pinout.
mbed_official 157:90e3acc479a2 632 * This parameter can be: ENABLE or DISABLE.
mbed_official 157:90e3acc479a2 633 * @arg ENABLE: The TX and RX pins functions are swapped.
mbed_official 157:90e3acc479a2 634 * @arg DISABLE: TX/RX pins are used as defined in standard pinout
mbed_official 157:90e3acc479a2 635 * @note
mbed_official 157:90e3acc479a2 636 * This function has to be called before calling USART_Cmd() function.
mbed_official 157:90e3acc479a2 637 * @retval None
mbed_official 157:90e3acc479a2 638 */
mbed_official 157:90e3acc479a2 639 void USART_SWAPPinCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 157:90e3acc479a2 640 {
mbed_official 157:90e3acc479a2 641 /* Check the parameters */
mbed_official 157:90e3acc479a2 642 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 643 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 157:90e3acc479a2 644
mbed_official 157:90e3acc479a2 645 if (NewState != DISABLE)
mbed_official 157:90e3acc479a2 646 {
mbed_official 157:90e3acc479a2 647 /* Enable the SWAP feature by setting the SWAP bit in the CR2 register */
mbed_official 157:90e3acc479a2 648 USARTx->CR2 |= USART_CR2_SWAP;
mbed_official 157:90e3acc479a2 649 }
mbed_official 157:90e3acc479a2 650 else
mbed_official 157:90e3acc479a2 651 {
mbed_official 157:90e3acc479a2 652 /* Disable the SWAP feature by clearing the SWAP bit in the CR2 register */
mbed_official 157:90e3acc479a2 653 USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_SWAP);
mbed_official 157:90e3acc479a2 654 }
mbed_official 157:90e3acc479a2 655 }
mbed_official 157:90e3acc479a2 656
mbed_official 157:90e3acc479a2 657 /**
mbed_official 157:90e3acc479a2 658 * @brief Enables or disables the receiver Time Out feature.
mbed_official 157:90e3acc479a2 659 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 660 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 661 * @param NewState: new state of the USARTx receiver Time Out.
mbed_official 157:90e3acc479a2 662 * This parameter can be: ENABLE or DISABLE.
mbed_official 157:90e3acc479a2 663 * @retval None
mbed_official 157:90e3acc479a2 664 */
mbed_official 157:90e3acc479a2 665 void USART_ReceiverTimeOutCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 157:90e3acc479a2 666 {
mbed_official 157:90e3acc479a2 667 /* Check the parameters */
mbed_official 157:90e3acc479a2 668 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 669 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 157:90e3acc479a2 670
mbed_official 157:90e3acc479a2 671 if (NewState != DISABLE)
mbed_official 157:90e3acc479a2 672 {
mbed_official 157:90e3acc479a2 673 /* Enable the receiver time out feature by setting the RTOEN bit in the CR2
mbed_official 157:90e3acc479a2 674 register */
mbed_official 157:90e3acc479a2 675 USARTx->CR2 |= USART_CR2_RTOEN;
mbed_official 157:90e3acc479a2 676 }
mbed_official 157:90e3acc479a2 677 else
mbed_official 157:90e3acc479a2 678 {
mbed_official 157:90e3acc479a2 679 /* Disable the receiver time out feature by clearing the RTOEN bit in the CR2
mbed_official 157:90e3acc479a2 680 register */
mbed_official 157:90e3acc479a2 681 USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_RTOEN);
mbed_official 157:90e3acc479a2 682 }
mbed_official 157:90e3acc479a2 683 }
mbed_official 157:90e3acc479a2 684
mbed_official 157:90e3acc479a2 685 /**
mbed_official 157:90e3acc479a2 686 * @brief Sets the receiver Time Out value.
mbed_official 157:90e3acc479a2 687 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 688 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 689 * @param USART_ReceiverTimeOut: specifies the Receiver Time Out value.
mbed_official 157:90e3acc479a2 690 * @retval None
mbed_official 157:90e3acc479a2 691 */
mbed_official 157:90e3acc479a2 692 void USART_SetReceiverTimeOut(USART_TypeDef* USARTx, uint32_t USART_ReceiverTimeOut)
mbed_official 157:90e3acc479a2 693 {
mbed_official 157:90e3acc479a2 694 /* Check the parameters */
mbed_official 157:90e3acc479a2 695 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 696 assert_param(IS_USART_TIMEOUT(USART_ReceiverTimeOut));
mbed_official 157:90e3acc479a2 697
mbed_official 157:90e3acc479a2 698 /* Clear the receiver Time Out value by clearing the RTO[23:0] bits in the RTOR
mbed_official 157:90e3acc479a2 699 register */
mbed_official 157:90e3acc479a2 700 USARTx->RTOR &= (uint32_t)~((uint32_t)USART_RTOR_RTO);
mbed_official 157:90e3acc479a2 701 /* Set the receiver Time Out value by setting the RTO[23:0] bits in the RTOR
mbed_official 157:90e3acc479a2 702 register */
mbed_official 157:90e3acc479a2 703 USARTx->RTOR |= USART_ReceiverTimeOut;
mbed_official 157:90e3acc479a2 704 }
mbed_official 157:90e3acc479a2 705
mbed_official 157:90e3acc479a2 706 /**
mbed_official 157:90e3acc479a2 707 * @brief Sets the system clock prescaler.
mbed_official 157:90e3acc479a2 708 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 709 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 710 * @param USART_Prescaler: specifies the prescaler clock.
mbed_official 157:90e3acc479a2 711 * @note
mbed_official 157:90e3acc479a2 712 * This function has to be called before calling USART_Cmd() function.
mbed_official 157:90e3acc479a2 713 * @retval None
mbed_official 157:90e3acc479a2 714 */
mbed_official 157:90e3acc479a2 715 void USART_SetPrescaler(USART_TypeDef* USARTx, uint8_t USART_Prescaler)
mbed_official 157:90e3acc479a2 716 {
mbed_official 157:90e3acc479a2 717 /* Check the parameters */
mbed_official 157:90e3acc479a2 718 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 719
mbed_official 157:90e3acc479a2 720 /* Clear the USART prescaler */
mbed_official 157:90e3acc479a2 721 USARTx->GTPR &= USART_GTPR_GT;
mbed_official 157:90e3acc479a2 722 /* Set the USART prescaler */
mbed_official 157:90e3acc479a2 723 USARTx->GTPR |= USART_Prescaler;
mbed_official 157:90e3acc479a2 724 }
mbed_official 157:90e3acc479a2 725
mbed_official 157:90e3acc479a2 726 /**
mbed_official 157:90e3acc479a2 727 * @}
mbed_official 157:90e3acc479a2 728 */
mbed_official 157:90e3acc479a2 729
mbed_official 157:90e3acc479a2 730
mbed_official 157:90e3acc479a2 731 /** @defgroup USART_Group2 STOP Mode functions
mbed_official 157:90e3acc479a2 732 * @brief STOP Mode functions
mbed_official 157:90e3acc479a2 733 *
mbed_official 157:90e3acc479a2 734 @verbatim
mbed_official 157:90e3acc479a2 735 ===============================================================================
mbed_official 157:90e3acc479a2 736 ##### STOP Mode functions #####
mbed_official 157:90e3acc479a2 737 ===============================================================================
mbed_official 157:90e3acc479a2 738 [..] This subsection provides a set of functions allowing to manage
mbed_official 157:90e3acc479a2 739 WakeUp from STOP mode.
mbed_official 157:90e3acc479a2 740
mbed_official 157:90e3acc479a2 741 [..] The USART is able to WakeUp from Stop Mode if USART clock is set to HSI
mbed_official 157:90e3acc479a2 742 or LSI.
mbed_official 157:90e3acc479a2 743
mbed_official 157:90e3acc479a2 744 [..] The WakeUp source is configured by calling USART_StopModeWakeUpSourceConfig()
mbed_official 157:90e3acc479a2 745 function.
mbed_official 157:90e3acc479a2 746
mbed_official 157:90e3acc479a2 747 [..] After configuring the source of WakeUp and before entering in Stop Mode
mbed_official 157:90e3acc479a2 748 USART_STOPModeCmd() function should be called to allow USART WakeUp.
mbed_official 157:90e3acc479a2 749
mbed_official 157:90e3acc479a2 750 @endverbatim
mbed_official 157:90e3acc479a2 751 * @{
mbed_official 157:90e3acc479a2 752 */
mbed_official 157:90e3acc479a2 753
mbed_official 157:90e3acc479a2 754 /**
mbed_official 157:90e3acc479a2 755 * @brief Enables or disables the specified USART peripheral in STOP Mode.
mbed_official 157:90e3acc479a2 756 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 757 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 758 * @param NewState: new state of the USARTx peripheral state in stop mode.
mbed_official 157:90e3acc479a2 759 * This parameter can be: ENABLE or DISABLE.
mbed_official 157:90e3acc479a2 760 * @note
mbed_official 157:90e3acc479a2 761 * This function has to be called when USART clock is set to HSI or LSE.
mbed_official 157:90e3acc479a2 762 * @retval None
mbed_official 157:90e3acc479a2 763 */
mbed_official 157:90e3acc479a2 764 void USART_STOPModeCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 157:90e3acc479a2 765 {
mbed_official 157:90e3acc479a2 766 /* Check the parameters */
mbed_official 157:90e3acc479a2 767 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 768 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 157:90e3acc479a2 769
mbed_official 157:90e3acc479a2 770 if (NewState != DISABLE)
mbed_official 157:90e3acc479a2 771 {
mbed_official 157:90e3acc479a2 772 /* Enable the selected USART in STOP mode by setting the UESM bit in the CR1
mbed_official 157:90e3acc479a2 773 register */
mbed_official 157:90e3acc479a2 774 USARTx->CR1 |= USART_CR1_UESM;
mbed_official 157:90e3acc479a2 775 }
mbed_official 157:90e3acc479a2 776 else
mbed_official 157:90e3acc479a2 777 {
mbed_official 157:90e3acc479a2 778 /* Disable the selected USART in STOP mode by clearing the UE bit in the CR1
mbed_official 157:90e3acc479a2 779 register */
mbed_official 157:90e3acc479a2 780 USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_UESM);
mbed_official 157:90e3acc479a2 781 }
mbed_official 157:90e3acc479a2 782 }
mbed_official 157:90e3acc479a2 783
mbed_official 157:90e3acc479a2 784 /**
mbed_official 157:90e3acc479a2 785 * @brief Selects the USART WakeUp method form stop mode.
mbed_official 157:90e3acc479a2 786 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 787 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 788 * @param USART_WakeUp: specifies the selected USART wakeup method.
mbed_official 157:90e3acc479a2 789 * This parameter can be one of the following values:
mbed_official 157:90e3acc479a2 790 * @arg USART_WakeUpSource_AddressMatch: WUF active on address match.
mbed_official 157:90e3acc479a2 791 * @arg USART_WakeUpSource_StartBit: WUF active on Start bit detection.
mbed_official 157:90e3acc479a2 792 * @arg USART_WakeUpSource_RXNE: WUF active on RXNE.
mbed_official 157:90e3acc479a2 793 * @note
mbed_official 157:90e3acc479a2 794 * This function has to be called before calling USART_Cmd() function.
mbed_official 157:90e3acc479a2 795 * @retval None
mbed_official 157:90e3acc479a2 796 */
mbed_official 157:90e3acc479a2 797 void USART_StopModeWakeUpSourceConfig(USART_TypeDef* USARTx, uint32_t USART_WakeUpSource)
mbed_official 157:90e3acc479a2 798 {
mbed_official 157:90e3acc479a2 799 /* Check the parameters */
mbed_official 157:90e3acc479a2 800 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 801 assert_param(IS_USART_STOPMODE_WAKEUPSOURCE(USART_WakeUpSource));
mbed_official 157:90e3acc479a2 802
mbed_official 157:90e3acc479a2 803 USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_WUS);
mbed_official 157:90e3acc479a2 804 USARTx->CR3 |= USART_WakeUpSource;
mbed_official 157:90e3acc479a2 805 }
mbed_official 157:90e3acc479a2 806
mbed_official 157:90e3acc479a2 807 /**
mbed_official 157:90e3acc479a2 808 * @}
mbed_official 157:90e3acc479a2 809 */
mbed_official 157:90e3acc479a2 810
mbed_official 157:90e3acc479a2 811
mbed_official 157:90e3acc479a2 812 /** @defgroup USART_Group3 AutoBaudRate functions
mbed_official 157:90e3acc479a2 813 * @brief AutoBaudRate functions
mbed_official 157:90e3acc479a2 814 *
mbed_official 157:90e3acc479a2 815 @verbatim
mbed_official 157:90e3acc479a2 816 ===============================================================================
mbed_official 157:90e3acc479a2 817 ##### AutoBaudRate functions #####
mbed_official 157:90e3acc479a2 818 ===============================================================================
mbed_official 157:90e3acc479a2 819 [..] This subsection provides a set of functions allowing to manage
mbed_official 157:90e3acc479a2 820 the AutoBaudRate detections.
mbed_official 157:90e3acc479a2 821
mbed_official 157:90e3acc479a2 822 [..] Before Enabling AutoBaudRate detection using USART_AutoBaudRateCmd ()
mbed_official 157:90e3acc479a2 823 The character patterns used to calculate baudrate must be chosen by calling
mbed_official 157:90e3acc479a2 824 USART_AutoBaudRateConfig() function. These function take as parameter :
mbed_official 157:90e3acc479a2 825 (#)USART_AutoBaudRate_StartBit : any character starting with a bit 1.
mbed_official 157:90e3acc479a2 826 (#)USART_AutoBaudRate_FallingEdge : any character starting with a 10xx bit pattern.
mbed_official 157:90e3acc479a2 827
mbed_official 157:90e3acc479a2 828 [..] At any later time, another request for AutoBaudRate detection can be performed
mbed_official 157:90e3acc479a2 829 using USART_RequestCmd() function.
mbed_official 157:90e3acc479a2 830
mbed_official 157:90e3acc479a2 831 [..] The AutoBaudRate detection is monitored by the status of ABRF flag which indicate
mbed_official 157:90e3acc479a2 832 that the AutoBaudRate detection is completed. In addition to ABRF flag, the ABRE flag
mbed_official 157:90e3acc479a2 833 indicate that this procedure is completed without success. USART_GetFlagStatus ()
mbed_official 157:90e3acc479a2 834 function should be used to monitor the status of these flags.
mbed_official 157:90e3acc479a2 835
mbed_official 157:90e3acc479a2 836 @endverbatim
mbed_official 157:90e3acc479a2 837 * @{
mbed_official 157:90e3acc479a2 838 */
mbed_official 157:90e3acc479a2 839
mbed_official 157:90e3acc479a2 840 /**
mbed_official 157:90e3acc479a2 841 * @brief Enables or disables the Auto Baud Rate.
mbed_official 157:90e3acc479a2 842 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 843 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 844 * @param NewState: new state of the USARTx auto baud rate.
mbed_official 157:90e3acc479a2 845 * This parameter can be: ENABLE or DISABLE.
mbed_official 157:90e3acc479a2 846 * @retval None
mbed_official 157:90e3acc479a2 847 */
mbed_official 157:90e3acc479a2 848 void USART_AutoBaudRateCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 157:90e3acc479a2 849 {
mbed_official 157:90e3acc479a2 850 /* Check the parameters */
mbed_official 157:90e3acc479a2 851 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 852 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 157:90e3acc479a2 853
mbed_official 157:90e3acc479a2 854 if (NewState != DISABLE)
mbed_official 157:90e3acc479a2 855 {
mbed_official 157:90e3acc479a2 856 /* Enable the auto baud rate feature by setting the ABREN bit in the CR2
mbed_official 157:90e3acc479a2 857 register */
mbed_official 157:90e3acc479a2 858 USARTx->CR2 |= USART_CR2_ABREN;
mbed_official 157:90e3acc479a2 859 }
mbed_official 157:90e3acc479a2 860 else
mbed_official 157:90e3acc479a2 861 {
mbed_official 157:90e3acc479a2 862 /* Disable the auto baud rate feature by clearing the ABREN bit in the CR2
mbed_official 157:90e3acc479a2 863 register */
mbed_official 157:90e3acc479a2 864 USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_ABREN);
mbed_official 157:90e3acc479a2 865 }
mbed_official 157:90e3acc479a2 866 }
mbed_official 157:90e3acc479a2 867
mbed_official 157:90e3acc479a2 868 /**
mbed_official 157:90e3acc479a2 869 * @brief Selects the USART auto baud rate method.
mbed_official 157:90e3acc479a2 870 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 871 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 872 * @param USART_AutoBaudRate: specifies the selected USART auto baud rate method.
mbed_official 157:90e3acc479a2 873 * This parameter can be one of the following values:
mbed_official 157:90e3acc479a2 874 * @arg USART_AutoBaudRate_StartBit: Start Bit duration measurement.
mbed_official 157:90e3acc479a2 875 * @arg USART_AutoBaudRate_FallingEdge: Falling edge to falling edge measurement.
mbed_official 157:90e3acc479a2 876 * @arg USART_AutoBaudRate_0x7FFrame: 0x7F frame.
mbed_official 157:90e3acc479a2 877 * @arg USART_AutoBaudRate_0x55Frame: 0x55 frame.
mbed_official 157:90e3acc479a2 878 * @note
mbed_official 157:90e3acc479a2 879 * This function has to be called before calling USART_Cmd() function.
mbed_official 157:90e3acc479a2 880 * @retval None
mbed_official 157:90e3acc479a2 881 */
mbed_official 157:90e3acc479a2 882 void USART_AutoBaudRateConfig(USART_TypeDef* USARTx, uint32_t USART_AutoBaudRate)
mbed_official 157:90e3acc479a2 883 {
mbed_official 157:90e3acc479a2 884 /* Check the parameters */
mbed_official 157:90e3acc479a2 885 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 886 assert_param(IS_USART_AUTOBAUDRATE_MODE(USART_AutoBaudRate));
mbed_official 157:90e3acc479a2 887
mbed_official 157:90e3acc479a2 888 USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_ABRMODE);
mbed_official 157:90e3acc479a2 889 USARTx->CR2 |= USART_AutoBaudRate;
mbed_official 157:90e3acc479a2 890 }
mbed_official 157:90e3acc479a2 891
mbed_official 157:90e3acc479a2 892 /**
mbed_official 157:90e3acc479a2 893 * @}
mbed_official 157:90e3acc479a2 894 */
mbed_official 157:90e3acc479a2 895
mbed_official 157:90e3acc479a2 896
mbed_official 157:90e3acc479a2 897 /** @defgroup USART_Group4 Data transfers functions
mbed_official 157:90e3acc479a2 898 * @brief Data transfers functions
mbed_official 157:90e3acc479a2 899 *
mbed_official 157:90e3acc479a2 900 @verbatim
mbed_official 157:90e3acc479a2 901 ===============================================================================
mbed_official 157:90e3acc479a2 902 ##### Data transfers functions #####
mbed_official 157:90e3acc479a2 903 ===============================================================================
mbed_official 157:90e3acc479a2 904 [..] This subsection provides a set of functions allowing to manage
mbed_official 157:90e3acc479a2 905 the USART data transfers.
mbed_official 157:90e3acc479a2 906 [..] During an USART reception, data shifts in least significant bit first
mbed_official 157:90e3acc479a2 907 through the RX pin. When a transmission is taking place, a write instruction to
mbed_official 157:90e3acc479a2 908 the USART_TDR register stores the data in the shift register.
mbed_official 157:90e3acc479a2 909 [..] The read access of the USART_RDR register can be done using
mbed_official 157:90e3acc479a2 910 the USART_ReceiveData() function and returns the RDR value.
mbed_official 157:90e3acc479a2 911 Whereas a write access to the USART_TDR can be done using USART_SendData()
mbed_official 157:90e3acc479a2 912 function and stores the written data into TDR.
mbed_official 157:90e3acc479a2 913
mbed_official 157:90e3acc479a2 914 @endverbatim
mbed_official 157:90e3acc479a2 915 * @{
mbed_official 157:90e3acc479a2 916 */
mbed_official 157:90e3acc479a2 917
mbed_official 157:90e3acc479a2 918 /**
mbed_official 157:90e3acc479a2 919 * @brief Transmits single data through the USARTx peripheral.
mbed_official 157:90e3acc479a2 920 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 921 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 922 * @param Data: the data to transmit.
mbed_official 157:90e3acc479a2 923 * @retval None
mbed_official 157:90e3acc479a2 924 */
mbed_official 157:90e3acc479a2 925 void USART_SendData(USART_TypeDef* USARTx, uint16_t Data)
mbed_official 157:90e3acc479a2 926 {
mbed_official 157:90e3acc479a2 927 /* Check the parameters */
mbed_official 157:90e3acc479a2 928 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 929 assert_param(IS_USART_DATA(Data));
mbed_official 157:90e3acc479a2 930
mbed_official 157:90e3acc479a2 931 /* Transmit Data */
mbed_official 157:90e3acc479a2 932 USARTx->TDR = (Data & (uint16_t)0x01FF);
mbed_official 157:90e3acc479a2 933 }
mbed_official 157:90e3acc479a2 934
mbed_official 157:90e3acc479a2 935 /**
mbed_official 157:90e3acc479a2 936 * @brief Returns the most recent received data by the USARTx peripheral.
mbed_official 157:90e3acc479a2 937 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 938 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 939 * @retval The received data.
mbed_official 157:90e3acc479a2 940 */
mbed_official 157:90e3acc479a2 941 uint16_t USART_ReceiveData(USART_TypeDef* USARTx)
mbed_official 157:90e3acc479a2 942 {
mbed_official 157:90e3acc479a2 943 /* Check the parameters */
mbed_official 157:90e3acc479a2 944 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 945
mbed_official 157:90e3acc479a2 946 /* Receive Data */
mbed_official 157:90e3acc479a2 947 return (uint16_t)(USARTx->RDR & (uint16_t)0x01FF);
mbed_official 157:90e3acc479a2 948 }
mbed_official 157:90e3acc479a2 949
mbed_official 157:90e3acc479a2 950 /**
mbed_official 157:90e3acc479a2 951 * @}
mbed_official 157:90e3acc479a2 952 */
mbed_official 157:90e3acc479a2 953
mbed_official 157:90e3acc479a2 954 /** @defgroup USART_Group5 MultiProcessor Communication functions
mbed_official 157:90e3acc479a2 955 * @brief Multi-Processor Communication functions
mbed_official 157:90e3acc479a2 956 *
mbed_official 157:90e3acc479a2 957 @verbatim
mbed_official 157:90e3acc479a2 958 ===============================================================================
mbed_official 157:90e3acc479a2 959 ##### Multi-Processor Communication functions #####
mbed_official 157:90e3acc479a2 960 ===============================================================================
mbed_official 157:90e3acc479a2 961 [..] This subsection provides a set of functions allowing to manage the USART
mbed_official 157:90e3acc479a2 962 multiprocessor communication.
mbed_official 157:90e3acc479a2 963 [..] For instance one of the USARTs can be the master, its TX output is
mbed_official 157:90e3acc479a2 964 connected to the RX input of the other USART. The others are slaves,
mbed_official 157:90e3acc479a2 965 their respective TX outputs are logically ANDed together and connected
mbed_official 157:90e3acc479a2 966 to the RX input of the master. USART multiprocessor communication is
mbed_official 157:90e3acc479a2 967 possible through the following procedure:
mbed_official 157:90e3acc479a2 968 (#) Program the Baud rate, Word length = 9 bits, Stop bits, Parity,
mbed_official 157:90e3acc479a2 969 Mode transmitter or Mode receiver and hardware flow control values
mbed_official 157:90e3acc479a2 970 using the USART_Init() function.
mbed_official 157:90e3acc479a2 971 (#) Configures the USART address using the USART_SetAddress() function.
mbed_official 157:90e3acc479a2 972 (#) Configures the wake up methode (USART_WakeUp_IdleLine or
mbed_official 157:90e3acc479a2 973 USART_WakeUp_AddressMark) using USART_WakeUpConfig() function only
mbed_official 157:90e3acc479a2 974 for the slaves.
mbed_official 157:90e3acc479a2 975 (#) Enable the USART using the USART_Cmd() function.
mbed_official 157:90e3acc479a2 976 (#) Enter the USART slaves in mute mode using USART_ReceiverWakeUpCmd()
mbed_official 157:90e3acc479a2 977 function.
mbed_official 157:90e3acc479a2 978 [..] The USART Slave exit from mute mode when receive the wake up condition.
mbed_official 157:90e3acc479a2 979
mbed_official 157:90e3acc479a2 980 @endverbatim
mbed_official 157:90e3acc479a2 981 * @{
mbed_official 157:90e3acc479a2 982 */
mbed_official 157:90e3acc479a2 983
mbed_official 157:90e3acc479a2 984 /**
mbed_official 157:90e3acc479a2 985 * @brief Sets the address of the USART node.
mbed_official 157:90e3acc479a2 986 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 987 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 988 * @param USART_Address: Indicates the address of the USART node.
mbed_official 157:90e3acc479a2 989 * @retval None
mbed_official 157:90e3acc479a2 990 */
mbed_official 157:90e3acc479a2 991 void USART_SetAddress(USART_TypeDef* USARTx, uint8_t USART_Address)
mbed_official 157:90e3acc479a2 992 {
mbed_official 157:90e3acc479a2 993 /* Check the parameters */
mbed_official 157:90e3acc479a2 994 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 995
mbed_official 157:90e3acc479a2 996 /* Clear the USART address */
mbed_official 157:90e3acc479a2 997 USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_ADD);
mbed_official 157:90e3acc479a2 998 /* Set the USART address node */
mbed_official 157:90e3acc479a2 999 USARTx->CR2 |=((uint32_t)USART_Address << (uint32_t)0x18);
mbed_official 157:90e3acc479a2 1000 }
mbed_official 157:90e3acc479a2 1001
mbed_official 157:90e3acc479a2 1002 /**
mbed_official 157:90e3acc479a2 1003 * @brief Enables or disables the USART's mute mode.
mbed_official 157:90e3acc479a2 1004 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 1005 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 1006 * @param NewState: new state of the USART mute mode.
mbed_official 157:90e3acc479a2 1007 * This parameter can be: ENABLE or DISABLE.
mbed_official 157:90e3acc479a2 1008 * @retval None
mbed_official 157:90e3acc479a2 1009 */
mbed_official 157:90e3acc479a2 1010 void USART_MuteModeCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 157:90e3acc479a2 1011 {
mbed_official 157:90e3acc479a2 1012 /* Check the parameters */
mbed_official 157:90e3acc479a2 1013 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 1014 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 157:90e3acc479a2 1015
mbed_official 157:90e3acc479a2 1016 if (NewState != DISABLE)
mbed_official 157:90e3acc479a2 1017 {
mbed_official 157:90e3acc479a2 1018 /* Enable the USART mute mode by setting the MME bit in the CR1 register */
mbed_official 157:90e3acc479a2 1019 USARTx->CR1 |= USART_CR1_MME;
mbed_official 157:90e3acc479a2 1020 }
mbed_official 157:90e3acc479a2 1021 else
mbed_official 157:90e3acc479a2 1022 {
mbed_official 157:90e3acc479a2 1023 /* Disable the USART mute mode by clearing the MME bit in the CR1 register */
mbed_official 157:90e3acc479a2 1024 USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_MME);
mbed_official 157:90e3acc479a2 1025 }
mbed_official 157:90e3acc479a2 1026 }
mbed_official 157:90e3acc479a2 1027
mbed_official 157:90e3acc479a2 1028 /**
mbed_official 157:90e3acc479a2 1029 * @brief Selects the USART WakeUp method from mute mode.
mbed_official 157:90e3acc479a2 1030 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 1031 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 1032 * @param USART_WakeUp: specifies the USART wakeup method.
mbed_official 157:90e3acc479a2 1033 * This parameter can be one of the following values:
mbed_official 157:90e3acc479a2 1034 * @arg USART_WakeUp_IdleLine: WakeUp by an idle line detection
mbed_official 157:90e3acc479a2 1035 * @arg USART_WakeUp_AddressMark: WakeUp by an address mark
mbed_official 157:90e3acc479a2 1036 * @retval None
mbed_official 157:90e3acc479a2 1037 */
mbed_official 157:90e3acc479a2 1038 void USART_MuteModeWakeUpConfig(USART_TypeDef* USARTx, uint32_t USART_WakeUp)
mbed_official 157:90e3acc479a2 1039 {
mbed_official 157:90e3acc479a2 1040 /* Check the parameters */
mbed_official 157:90e3acc479a2 1041 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 1042 assert_param(IS_USART_MUTEMODE_WAKEUP(USART_WakeUp));
mbed_official 157:90e3acc479a2 1043
mbed_official 157:90e3acc479a2 1044 USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_WAKE);
mbed_official 157:90e3acc479a2 1045 USARTx->CR1 |= USART_WakeUp;
mbed_official 157:90e3acc479a2 1046 }
mbed_official 157:90e3acc479a2 1047
mbed_official 157:90e3acc479a2 1048 /**
mbed_official 157:90e3acc479a2 1049 * @brief Configure the the USART Address detection length.
mbed_official 157:90e3acc479a2 1050 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 1051 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 1052 * @param USART_AddressLength: specifies the USART address length detection.
mbed_official 157:90e3acc479a2 1053 * This parameter can be one of the following values:
mbed_official 157:90e3acc479a2 1054 * @arg USART_AddressLength_4b: 4-bit address length detection
mbed_official 157:90e3acc479a2 1055 * @arg USART_AddressLength_7b: 7-bit address length detection
mbed_official 157:90e3acc479a2 1056 * @retval None
mbed_official 157:90e3acc479a2 1057 */
mbed_official 157:90e3acc479a2 1058 void USART_AddressDetectionConfig(USART_TypeDef* USARTx, uint32_t USART_AddressLength)
mbed_official 157:90e3acc479a2 1059 {
mbed_official 157:90e3acc479a2 1060 /* Check the parameters */
mbed_official 157:90e3acc479a2 1061 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 1062 assert_param(IS_USART_ADDRESS_DETECTION(USART_AddressLength));
mbed_official 157:90e3acc479a2 1063
mbed_official 157:90e3acc479a2 1064 USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_ADDM7);
mbed_official 157:90e3acc479a2 1065 USARTx->CR2 |= USART_AddressLength;
mbed_official 157:90e3acc479a2 1066 }
mbed_official 157:90e3acc479a2 1067
mbed_official 157:90e3acc479a2 1068 /**
mbed_official 157:90e3acc479a2 1069 * @}
mbed_official 157:90e3acc479a2 1070 */
mbed_official 157:90e3acc479a2 1071
mbed_official 157:90e3acc479a2 1072 /** @defgroup USART_Group6 LIN mode functions
mbed_official 157:90e3acc479a2 1073 * @brief LIN mode functions
mbed_official 157:90e3acc479a2 1074 *
mbed_official 157:90e3acc479a2 1075 @verbatim
mbed_official 157:90e3acc479a2 1076 ===============================================================================
mbed_official 157:90e3acc479a2 1077 ##### LIN mode functions #####
mbed_official 157:90e3acc479a2 1078 ===============================================================================
mbed_official 157:90e3acc479a2 1079 [..] This subsection provides a set of functions allowing to manage the USART
mbed_official 157:90e3acc479a2 1080 LIN Mode communication.
mbed_official 157:90e3acc479a2 1081 [..] In LIN mode, 8-bit data format with 1 stop bit is required in accordance
mbed_official 157:90e3acc479a2 1082 with the LIN standard.
mbed_official 157:90e3acc479a2 1083 [..] Only this LIN Feature is supported by the USART IP:
mbed_official 157:90e3acc479a2 1084 (+) LIN Master Synchronous Break send capability and LIN slave break
mbed_official 157:90e3acc479a2 1085 detection capability : 13-bit break generation and 10/11 bit break
mbed_official 157:90e3acc479a2 1086 detection.
mbed_official 157:90e3acc479a2 1087 [..] USART LIN Master transmitter communication is possible through the
mbed_official 157:90e3acc479a2 1088 following procedure:
mbed_official 157:90e3acc479a2 1089 (#) Program the Baud rate, Word length = 8bits, Stop bits = 1bit, Parity,
mbed_official 157:90e3acc479a2 1090 Mode transmitter or Mode receiver and hardware flow control values
mbed_official 157:90e3acc479a2 1091 using the USART_Init() function.
mbed_official 157:90e3acc479a2 1092 (#) Enable the LIN mode using the USART_LINCmd() function.
mbed_official 157:90e3acc479a2 1093 (#) Enable the USART using the USART_Cmd() function.
mbed_official 157:90e3acc479a2 1094 (#) Send the break character using USART_SendBreak() function.
mbed_official 157:90e3acc479a2 1095 [..] USART LIN Master receiver communication is possible through the
mbed_official 157:90e3acc479a2 1096 following procedure:
mbed_official 157:90e3acc479a2 1097 (#) Program the Baud rate, Word length = 8bits, Stop bits = 1bit, Parity,
mbed_official 157:90e3acc479a2 1098 Mode transmitter or Mode receiver and hardware flow control values
mbed_official 157:90e3acc479a2 1099 using the USART_Init() function.
mbed_official 157:90e3acc479a2 1100 (#) Configures the break detection length
mbed_official 157:90e3acc479a2 1101 using the USART_LINBreakDetectLengthConfig() function.
mbed_official 157:90e3acc479a2 1102 (#) Enable the LIN mode using the USART_LINCmd() function.
mbed_official 157:90e3acc479a2 1103 (#) Enable the USART using the USART_Cmd() function.
mbed_official 157:90e3acc479a2 1104 [..]
mbed_official 157:90e3acc479a2 1105 (@) In LIN mode, the following bits must be kept cleared:
mbed_official 157:90e3acc479a2 1106 (+@) CLKEN in the USART_CR2 register.
mbed_official 157:90e3acc479a2 1107 (+@) STOP[1:0], SCEN, HDSEL and IREN in the USART_CR3 register.
mbed_official 157:90e3acc479a2 1108
mbed_official 157:90e3acc479a2 1109 @endverbatim
mbed_official 157:90e3acc479a2 1110 * @{
mbed_official 157:90e3acc479a2 1111 */
mbed_official 157:90e3acc479a2 1112
mbed_official 157:90e3acc479a2 1113 /**
mbed_official 157:90e3acc479a2 1114 * @brief Sets the USART LIN Break detection length.
mbed_official 157:90e3acc479a2 1115 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 1116 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 1117 * @param USART_LINBreakDetectLength: specifies the LIN break detection length.
mbed_official 157:90e3acc479a2 1118 * This parameter can be one of the following values:
mbed_official 157:90e3acc479a2 1119 * @arg USART_LINBreakDetectLength_10b: 10-bit break detection
mbed_official 157:90e3acc479a2 1120 * @arg USART_LINBreakDetectLength_11b: 11-bit break detection
mbed_official 157:90e3acc479a2 1121 * @retval None
mbed_official 157:90e3acc479a2 1122 */
mbed_official 157:90e3acc479a2 1123 void USART_LINBreakDetectLengthConfig(USART_TypeDef* USARTx, uint32_t USART_LINBreakDetectLength)
mbed_official 157:90e3acc479a2 1124 {
mbed_official 157:90e3acc479a2 1125 /* Check the parameters */
mbed_official 157:90e3acc479a2 1126 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 1127 assert_param(IS_USART_LIN_BREAK_DETECT_LENGTH(USART_LINBreakDetectLength));
mbed_official 157:90e3acc479a2 1128
mbed_official 157:90e3acc479a2 1129 USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_LBDL);
mbed_official 157:90e3acc479a2 1130 USARTx->CR2 |= USART_LINBreakDetectLength;
mbed_official 157:90e3acc479a2 1131 }
mbed_official 157:90e3acc479a2 1132
mbed_official 157:90e3acc479a2 1133 /**
mbed_official 157:90e3acc479a2 1134 * @brief Enables or disables the USART's LIN mode.
mbed_official 157:90e3acc479a2 1135 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 1136 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 1137 * @param NewState: new state of the USART LIN mode.
mbed_official 157:90e3acc479a2 1138 * This parameter can be: ENABLE or DISABLE.
mbed_official 157:90e3acc479a2 1139 * @retval None
mbed_official 157:90e3acc479a2 1140 */
mbed_official 157:90e3acc479a2 1141 void USART_LINCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 157:90e3acc479a2 1142 {
mbed_official 157:90e3acc479a2 1143 /* Check the parameters */
mbed_official 157:90e3acc479a2 1144 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 1145 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 157:90e3acc479a2 1146
mbed_official 157:90e3acc479a2 1147 if (NewState != DISABLE)
mbed_official 157:90e3acc479a2 1148 {
mbed_official 157:90e3acc479a2 1149 /* Enable the LIN mode by setting the LINEN bit in the CR2 register */
mbed_official 157:90e3acc479a2 1150 USARTx->CR2 |= USART_CR2_LINEN;
mbed_official 157:90e3acc479a2 1151 }
mbed_official 157:90e3acc479a2 1152 else
mbed_official 157:90e3acc479a2 1153 {
mbed_official 157:90e3acc479a2 1154 /* Disable the LIN mode by clearing the LINEN bit in the CR2 register */
mbed_official 157:90e3acc479a2 1155 USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_LINEN);
mbed_official 157:90e3acc479a2 1156 }
mbed_official 157:90e3acc479a2 1157 }
mbed_official 157:90e3acc479a2 1158
mbed_official 157:90e3acc479a2 1159 /**
mbed_official 157:90e3acc479a2 1160 * @}
mbed_official 157:90e3acc479a2 1161 */
mbed_official 157:90e3acc479a2 1162
mbed_official 157:90e3acc479a2 1163 /** @defgroup USART_Group7 Halfduplex mode function
mbed_official 157:90e3acc479a2 1164 * @brief Half-duplex mode function
mbed_official 157:90e3acc479a2 1165 *
mbed_official 157:90e3acc479a2 1166 @verbatim
mbed_official 157:90e3acc479a2 1167 ===============================================================================
mbed_official 157:90e3acc479a2 1168 ##### Half-duplex mode function #####
mbed_official 157:90e3acc479a2 1169 ===============================================================================
mbed_official 157:90e3acc479a2 1170 [..] This subsection provides a set of functions allowing to manage the USART
mbed_official 157:90e3acc479a2 1171 Half-duplex communication.
mbed_official 157:90e3acc479a2 1172 [..] The USART can be configured to follow a single-wire half-duplex protocol
mbed_official 157:90e3acc479a2 1173 where the TX and RX lines are internally connected.
mbed_official 157:90e3acc479a2 1174 [..] USART Half duplex communication is possible through the following procedure:
mbed_official 157:90e3acc479a2 1175 (#) Program the Baud rate, Word length, Stop bits, Parity, Mode transmitter
mbed_official 157:90e3acc479a2 1176 or Mode receiver and hardware flow control values using the USART_Init()
mbed_official 157:90e3acc479a2 1177 function.
mbed_official 157:90e3acc479a2 1178 (#) Configures the USART address using the USART_SetAddress() function.
mbed_official 157:90e3acc479a2 1179 (#) Enable the half duplex mode using USART_HalfDuplexCmd() function.
mbed_official 157:90e3acc479a2 1180 (#) Enable the USART using the USART_Cmd() function.
mbed_official 157:90e3acc479a2 1181 [..]
mbed_official 157:90e3acc479a2 1182 (@) The RX pin is no longer used.
mbed_official 157:90e3acc479a2 1183 (@) In Half-duplex mode the following bits must be kept cleared:
mbed_official 157:90e3acc479a2 1184 (+@) LINEN and CLKEN bits in the USART_CR2 register.
mbed_official 157:90e3acc479a2 1185 (+@) SCEN and IREN bits in the USART_CR3 register.
mbed_official 157:90e3acc479a2 1186
mbed_official 157:90e3acc479a2 1187 @endverbatim
mbed_official 157:90e3acc479a2 1188 * @{
mbed_official 157:90e3acc479a2 1189 */
mbed_official 157:90e3acc479a2 1190
mbed_official 157:90e3acc479a2 1191 /**
mbed_official 157:90e3acc479a2 1192 * @brief Enables or disables the USART's Half Duplex communication.
mbed_official 157:90e3acc479a2 1193 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 1194 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 1195 * @param NewState: new state of the USART Communication.
mbed_official 157:90e3acc479a2 1196 * This parameter can be: ENABLE or DISABLE.
mbed_official 157:90e3acc479a2 1197 * @retval None
mbed_official 157:90e3acc479a2 1198 */
mbed_official 157:90e3acc479a2 1199 void USART_HalfDuplexCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 157:90e3acc479a2 1200 {
mbed_official 157:90e3acc479a2 1201 /* Check the parameters */
mbed_official 157:90e3acc479a2 1202 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 1203 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 157:90e3acc479a2 1204
mbed_official 157:90e3acc479a2 1205 if (NewState != DISABLE)
mbed_official 157:90e3acc479a2 1206 {
mbed_official 157:90e3acc479a2 1207 /* Enable the Half-Duplex mode by setting the HDSEL bit in the CR3 register */
mbed_official 157:90e3acc479a2 1208 USARTx->CR3 |= USART_CR3_HDSEL;
mbed_official 157:90e3acc479a2 1209 }
mbed_official 157:90e3acc479a2 1210 else
mbed_official 157:90e3acc479a2 1211 {
mbed_official 157:90e3acc479a2 1212 /* Disable the Half-Duplex mode by clearing the HDSEL bit in the CR3 register */
mbed_official 157:90e3acc479a2 1213 USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_HDSEL);
mbed_official 157:90e3acc479a2 1214 }
mbed_official 157:90e3acc479a2 1215 }
mbed_official 157:90e3acc479a2 1216
mbed_official 157:90e3acc479a2 1217 /**
mbed_official 157:90e3acc479a2 1218 * @}
mbed_official 157:90e3acc479a2 1219 */
mbed_official 157:90e3acc479a2 1220
mbed_official 157:90e3acc479a2 1221
mbed_official 157:90e3acc479a2 1222 /** @defgroup USART_Group8 Smartcard mode functions
mbed_official 157:90e3acc479a2 1223 * @brief Smartcard mode functions
mbed_official 157:90e3acc479a2 1224 *
mbed_official 157:90e3acc479a2 1225 @verbatim
mbed_official 157:90e3acc479a2 1226 ===============================================================================
mbed_official 157:90e3acc479a2 1227 ##### Smartcard mode functions #####
mbed_official 157:90e3acc479a2 1228 ===============================================================================
mbed_official 157:90e3acc479a2 1229 [..] This subsection provides a set of functions allowing to manage the USART
mbed_official 157:90e3acc479a2 1230 Smartcard communication.
mbed_official 157:90e3acc479a2 1231 [..] The Smartcard interface is designed to support asynchronous protocol
mbed_official 157:90e3acc479a2 1232 Smartcards as defined in the ISO 7816-3 standard. The USART can provide
mbed_official 157:90e3acc479a2 1233 a clock to the smartcard through the SCLK output. In smartcard mode,
mbed_official 157:90e3acc479a2 1234 SCLK is not associated to the communication but is simply derived from
mbed_official 157:90e3acc479a2 1235 the internal peripheral input clock through a 5-bit prescaler.
mbed_official 157:90e3acc479a2 1236 [..] Smartcard communication is possible through the following procedure:
mbed_official 157:90e3acc479a2 1237 (#) Configures the Smartcard Prsecaler using the USART_SetPrescaler()
mbed_official 157:90e3acc479a2 1238 function.
mbed_official 157:90e3acc479a2 1239 (#) Configures the Smartcard Guard Time using the USART_SetGuardTime()
mbed_official 157:90e3acc479a2 1240 function.
mbed_official 157:90e3acc479a2 1241 (#) Program the USART clock using the USART_ClockInit() function as following:
mbed_official 157:90e3acc479a2 1242 (++) USART Clock enabled.
mbed_official 157:90e3acc479a2 1243 (++) USART CPOL Low.
mbed_official 157:90e3acc479a2 1244 (++) USART CPHA on first edge.
mbed_official 157:90e3acc479a2 1245 (++) USART Last Bit Clock Enabled.
mbed_official 157:90e3acc479a2 1246 (#) Program the Smartcard interface using the USART_Init() function as
mbed_official 157:90e3acc479a2 1247 following:
mbed_official 157:90e3acc479a2 1248 (++) Word Length = 9 Bits.
mbed_official 157:90e3acc479a2 1249 (++) 1.5 Stop Bit.
mbed_official 157:90e3acc479a2 1250 (++) Even parity.
mbed_official 157:90e3acc479a2 1251 (++) BaudRate = 12096 baud.
mbed_official 157:90e3acc479a2 1252 (++) Hardware flow control disabled (RTS and CTS signals).
mbed_official 157:90e3acc479a2 1253 (++) Tx and Rx enabled
mbed_official 157:90e3acc479a2 1254 (#) Optionally you can enable the parity error interrupt using
mbed_official 157:90e3acc479a2 1255 the USART_ITConfig() function.
mbed_official 157:90e3acc479a2 1256 (#) Enable the Smartcard NACK using the USART_SmartCardNACKCmd() function.
mbed_official 157:90e3acc479a2 1257 (#) Enable the Smartcard interface using the USART_SmartCardCmd() function.
mbed_official 157:90e3acc479a2 1258 (#) Enable the USART using the USART_Cmd() function.
mbed_official 157:90e3acc479a2 1259 [..]
mbed_official 157:90e3acc479a2 1260 Please refer to the ISO 7816-3 specification for more details.
mbed_official 157:90e3acc479a2 1261 [..]
mbed_official 157:90e3acc479a2 1262 (@) It is also possible to choose 0.5 stop bit for receiving but it is
mbed_official 157:90e3acc479a2 1263 recommended to use 1.5 stop bits for both transmitting and receiving
mbed_official 157:90e3acc479a2 1264 to avoid switching between the two configurations.
mbed_official 157:90e3acc479a2 1265 (@) In smartcard mode, the following bits must be kept cleared:
mbed_official 157:90e3acc479a2 1266 (+@) LINEN bit in the USART_CR2 register.
mbed_official 157:90e3acc479a2 1267 (+@) HDSEL and IREN bits in the USART_CR3 register.
mbed_official 157:90e3acc479a2 1268
mbed_official 157:90e3acc479a2 1269 @endverbatim
mbed_official 157:90e3acc479a2 1270 * @{
mbed_official 157:90e3acc479a2 1271 */
mbed_official 157:90e3acc479a2 1272
mbed_official 157:90e3acc479a2 1273 /**
mbed_official 157:90e3acc479a2 1274 * @brief Sets the specified USART guard time.
mbed_official 157:90e3acc479a2 1275 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 1276 * following values: USART1 or USART2 or USART3.
mbed_official 157:90e3acc479a2 1277 * @param USART_GuardTime: specifies the guard time.
mbed_official 157:90e3acc479a2 1278 * @retval None
mbed_official 157:90e3acc479a2 1279 */
mbed_official 157:90e3acc479a2 1280 void USART_SetGuardTime(USART_TypeDef* USARTx, uint8_t USART_GuardTime)
mbed_official 157:90e3acc479a2 1281 {
mbed_official 157:90e3acc479a2 1282 /* Check the parameters */
mbed_official 157:90e3acc479a2 1283 assert_param(IS_USART_123_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 1284
mbed_official 157:90e3acc479a2 1285 /* Clear the USART Guard time */
mbed_official 157:90e3acc479a2 1286 USARTx->GTPR &= USART_GTPR_PSC;
mbed_official 157:90e3acc479a2 1287 /* Set the USART guard time */
mbed_official 157:90e3acc479a2 1288 USARTx->GTPR |= (uint16_t)((uint16_t)USART_GuardTime << 0x08);
mbed_official 157:90e3acc479a2 1289 }
mbed_official 157:90e3acc479a2 1290
mbed_official 157:90e3acc479a2 1291 /**
mbed_official 157:90e3acc479a2 1292 * @brief Enables or disables the USART's Smart Card mode.
mbed_official 157:90e3acc479a2 1293 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 1294 * following values: USART1 or USART2 or USART3.
mbed_official 157:90e3acc479a2 1295 * @param NewState: new state of the Smart Card mode.
mbed_official 157:90e3acc479a2 1296 * This parameter can be: ENABLE or DISABLE.
mbed_official 157:90e3acc479a2 1297 * @retval None
mbed_official 157:90e3acc479a2 1298 */
mbed_official 157:90e3acc479a2 1299 void USART_SmartCardCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 157:90e3acc479a2 1300 {
mbed_official 157:90e3acc479a2 1301 /* Check the parameters */
mbed_official 157:90e3acc479a2 1302 assert_param(IS_USART_123_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 1303 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 157:90e3acc479a2 1304 if (NewState != DISABLE)
mbed_official 157:90e3acc479a2 1305 {
mbed_official 157:90e3acc479a2 1306 /* Enable the SC mode by setting the SCEN bit in the CR3 register */
mbed_official 157:90e3acc479a2 1307 USARTx->CR3 |= USART_CR3_SCEN;
mbed_official 157:90e3acc479a2 1308 }
mbed_official 157:90e3acc479a2 1309 else
mbed_official 157:90e3acc479a2 1310 {
mbed_official 157:90e3acc479a2 1311 /* Disable the SC mode by clearing the SCEN bit in the CR3 register */
mbed_official 157:90e3acc479a2 1312 USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_SCEN);
mbed_official 157:90e3acc479a2 1313 }
mbed_official 157:90e3acc479a2 1314 }
mbed_official 157:90e3acc479a2 1315
mbed_official 157:90e3acc479a2 1316 /**
mbed_official 157:90e3acc479a2 1317 * @brief Enables or disables NACK transmission.
mbed_official 157:90e3acc479a2 1318 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 1319 * following values: USART1 or USART2 or USART3.
mbed_official 157:90e3acc479a2 1320 * @param NewState: new state of the NACK transmission.
mbed_official 157:90e3acc479a2 1321 * This parameter can be: ENABLE or DISABLE.
mbed_official 157:90e3acc479a2 1322 * @retval None
mbed_official 157:90e3acc479a2 1323 */
mbed_official 157:90e3acc479a2 1324 void USART_SmartCardNACKCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 157:90e3acc479a2 1325 {
mbed_official 157:90e3acc479a2 1326 /* Check the parameters */
mbed_official 157:90e3acc479a2 1327 assert_param(IS_USART_123_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 1328 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 157:90e3acc479a2 1329 if (NewState != DISABLE)
mbed_official 157:90e3acc479a2 1330 {
mbed_official 157:90e3acc479a2 1331 /* Enable the NACK transmission by setting the NACK bit in the CR3 register */
mbed_official 157:90e3acc479a2 1332 USARTx->CR3 |= USART_CR3_NACK;
mbed_official 157:90e3acc479a2 1333 }
mbed_official 157:90e3acc479a2 1334 else
mbed_official 157:90e3acc479a2 1335 {
mbed_official 157:90e3acc479a2 1336 /* Disable the NACK transmission by clearing the NACK bit in the CR3 register */
mbed_official 157:90e3acc479a2 1337 USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_NACK);
mbed_official 157:90e3acc479a2 1338 }
mbed_official 157:90e3acc479a2 1339 }
mbed_official 157:90e3acc479a2 1340
mbed_official 157:90e3acc479a2 1341 /**
mbed_official 157:90e3acc479a2 1342 * @brief Sets the Smart Card number of retries in transmit and receive.
mbed_official 157:90e3acc479a2 1343 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 1344 * following values: USART1 or USART2 or USART3.
mbed_official 157:90e3acc479a2 1345 * @param USART_AutoCount: specifies the Smart Card auto retry count.
mbed_official 157:90e3acc479a2 1346 * @retval None
mbed_official 157:90e3acc479a2 1347 */
mbed_official 157:90e3acc479a2 1348 void USART_SetAutoRetryCount(USART_TypeDef* USARTx, uint8_t USART_AutoCount)
mbed_official 157:90e3acc479a2 1349 {
mbed_official 157:90e3acc479a2 1350 /* Check the parameters */
mbed_official 157:90e3acc479a2 1351 assert_param(IS_USART_123_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 1352 assert_param(IS_USART_AUTO_RETRY_COUNTER(USART_AutoCount));
mbed_official 157:90e3acc479a2 1353 /* Clear the USART auto retry count */
mbed_official 157:90e3acc479a2 1354 USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_SCARCNT);
mbed_official 157:90e3acc479a2 1355 /* Set the USART auto retry count*/
mbed_official 157:90e3acc479a2 1356 USARTx->CR3 |= (uint32_t)((uint32_t)USART_AutoCount << 0x11);
mbed_official 157:90e3acc479a2 1357 }
mbed_official 157:90e3acc479a2 1358
mbed_official 157:90e3acc479a2 1359 /**
mbed_official 157:90e3acc479a2 1360 * @brief Sets the Smart Card Block length.
mbed_official 157:90e3acc479a2 1361 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 1362 * following values: USART1 or USART2 or USART3.
mbed_official 157:90e3acc479a2 1363 * @param USART_BlockLength: specifies the Smart Card block length.
mbed_official 157:90e3acc479a2 1364 * @retval None
mbed_official 157:90e3acc479a2 1365 */
mbed_official 157:90e3acc479a2 1366 void USART_SetBlockLength(USART_TypeDef* USARTx, uint8_t USART_BlockLength)
mbed_official 157:90e3acc479a2 1367 {
mbed_official 157:90e3acc479a2 1368 /* Check the parameters */
mbed_official 157:90e3acc479a2 1369 assert_param(IS_USART_123_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 1370
mbed_official 157:90e3acc479a2 1371 /* Clear the Smart card block length */
mbed_official 157:90e3acc479a2 1372 USARTx->RTOR &= (uint32_t)~((uint32_t)USART_RTOR_BLEN);
mbed_official 157:90e3acc479a2 1373 /* Set the Smart Card block length */
mbed_official 157:90e3acc479a2 1374 USARTx->RTOR |= (uint32_t)((uint32_t)USART_BlockLength << 0x18);
mbed_official 157:90e3acc479a2 1375 }
mbed_official 157:90e3acc479a2 1376
mbed_official 157:90e3acc479a2 1377 /**
mbed_official 157:90e3acc479a2 1378 * @}
mbed_official 157:90e3acc479a2 1379 */
mbed_official 157:90e3acc479a2 1380
mbed_official 157:90e3acc479a2 1381 /** @defgroup USART_Group9 IrDA mode functions
mbed_official 157:90e3acc479a2 1382 * @brief IrDA mode functions
mbed_official 157:90e3acc479a2 1383 *
mbed_official 157:90e3acc479a2 1384 @verbatim
mbed_official 157:90e3acc479a2 1385 ===============================================================================
mbed_official 157:90e3acc479a2 1386 ##### IrDA mode functions #####
mbed_official 157:90e3acc479a2 1387 ===============================================================================
mbed_official 157:90e3acc479a2 1388 [..] This subsection provides a set of functions allowing to manage the USART
mbed_official 157:90e3acc479a2 1389 IrDA communication.
mbed_official 157:90e3acc479a2 1390 [..] IrDA is a half duplex communication protocol. If the Transmitter is busy,
mbed_official 157:90e3acc479a2 1391 any data on the IrDA receive line will be ignored by the IrDA decoder
mbed_official 157:90e3acc479a2 1392 and if the Receiver is busy, data on the TX from the USART to IrDA will
mbed_official 157:90e3acc479a2 1393 not be encoded by IrDA. While receiving data, transmission should be
mbed_official 157:90e3acc479a2 1394 avoided as the data to be transmitted could be corrupted.
mbed_official 157:90e3acc479a2 1395 [..] IrDA communication is possible through the following procedure:
mbed_official 157:90e3acc479a2 1396 (#) Program the Baud rate, Word length = 8 bits, Stop bits, Parity,
mbed_official 157:90e3acc479a2 1397 Transmitter/Receiver modes and hardware flow control values using
mbed_official 157:90e3acc479a2 1398 the USART_Init() function.
mbed_official 157:90e3acc479a2 1399 (#) Configures the IrDA pulse width by configuring the prescaler using
mbed_official 157:90e3acc479a2 1400 the USART_SetPrescaler() function.
mbed_official 157:90e3acc479a2 1401 (#) Configures the IrDA USART_IrDAMode_LowPower or USART_IrDAMode_Normal
mbed_official 157:90e3acc479a2 1402 mode using the USART_IrDAConfig() function.
mbed_official 157:90e3acc479a2 1403 (#) Enable the IrDA using the USART_IrDACmd() function.
mbed_official 157:90e3acc479a2 1404 (#) Enable the USART using the USART_Cmd() function.
mbed_official 157:90e3acc479a2 1405 [..]
mbed_official 157:90e3acc479a2 1406 (@) A pulse of width less than two and greater than one PSC period(s) may or
mbed_official 157:90e3acc479a2 1407 may not be rejected.
mbed_official 157:90e3acc479a2 1408 (@) The receiver set up time should be managed by software. The IrDA physical
mbed_official 157:90e3acc479a2 1409 layer specification specifies a minimum of 10 ms delay between
mbed_official 157:90e3acc479a2 1410 transmission and reception (IrDA is a half duplex protocol).
mbed_official 157:90e3acc479a2 1411 (@) In IrDA mode, the following bits must be kept cleared:
mbed_official 157:90e3acc479a2 1412 (+@) LINEN, STOP and CLKEN bits in the USART_CR2 register.
mbed_official 157:90e3acc479a2 1413 (+@) SCEN and HDSEL bits in the USART_CR3 register.
mbed_official 157:90e3acc479a2 1414
mbed_official 157:90e3acc479a2 1415 @endverbatim
mbed_official 157:90e3acc479a2 1416 * @{
mbed_official 157:90e3acc479a2 1417 */
mbed_official 157:90e3acc479a2 1418
mbed_official 157:90e3acc479a2 1419 /**
mbed_official 157:90e3acc479a2 1420 * @brief Configures the USART's IrDA interface.
mbed_official 157:90e3acc479a2 1421 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 1422 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 1423 * @param USART_IrDAMode: specifies the IrDA mode.
mbed_official 157:90e3acc479a2 1424 * This parameter can be one of the following values:
mbed_official 157:90e3acc479a2 1425 * @arg USART_IrDAMode_LowPower
mbed_official 157:90e3acc479a2 1426 * @arg USART_IrDAMode_Normal
mbed_official 157:90e3acc479a2 1427 * @retval None
mbed_official 157:90e3acc479a2 1428 */
mbed_official 157:90e3acc479a2 1429 void USART_IrDAConfig(USART_TypeDef* USARTx, uint32_t USART_IrDAMode)
mbed_official 157:90e3acc479a2 1430 {
mbed_official 157:90e3acc479a2 1431 /* Check the parameters */
mbed_official 157:90e3acc479a2 1432 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 1433 assert_param(IS_USART_IRDA_MODE(USART_IrDAMode));
mbed_official 157:90e3acc479a2 1434
mbed_official 157:90e3acc479a2 1435 USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_IRLP);
mbed_official 157:90e3acc479a2 1436 USARTx->CR3 |= USART_IrDAMode;
mbed_official 157:90e3acc479a2 1437 }
mbed_official 157:90e3acc479a2 1438
mbed_official 157:90e3acc479a2 1439 /**
mbed_official 157:90e3acc479a2 1440 * @brief Enables or disables the USART's IrDA interface.
mbed_official 157:90e3acc479a2 1441 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 1442 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 1443 * @param NewState: new state of the IrDA mode.
mbed_official 157:90e3acc479a2 1444 * This parameter can be: ENABLE or DISABLE.
mbed_official 157:90e3acc479a2 1445 * @retval None
mbed_official 157:90e3acc479a2 1446 */
mbed_official 157:90e3acc479a2 1447 void USART_IrDACmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 157:90e3acc479a2 1448 {
mbed_official 157:90e3acc479a2 1449 /* Check the parameters */
mbed_official 157:90e3acc479a2 1450 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 1451 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 157:90e3acc479a2 1452
mbed_official 157:90e3acc479a2 1453 if (NewState != DISABLE)
mbed_official 157:90e3acc479a2 1454 {
mbed_official 157:90e3acc479a2 1455 /* Enable the IrDA mode by setting the IREN bit in the CR3 register */
mbed_official 157:90e3acc479a2 1456 USARTx->CR3 |= USART_CR3_IREN;
mbed_official 157:90e3acc479a2 1457 }
mbed_official 157:90e3acc479a2 1458 else
mbed_official 157:90e3acc479a2 1459 {
mbed_official 157:90e3acc479a2 1460 /* Disable the IrDA mode by clearing the IREN bit in the CR3 register */
mbed_official 157:90e3acc479a2 1461 USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_IREN);
mbed_official 157:90e3acc479a2 1462 }
mbed_official 157:90e3acc479a2 1463 }
mbed_official 157:90e3acc479a2 1464 /**
mbed_official 157:90e3acc479a2 1465 * @}
mbed_official 157:90e3acc479a2 1466 */
mbed_official 157:90e3acc479a2 1467
mbed_official 157:90e3acc479a2 1468 /** @defgroup USART_Group10 RS485 mode function
mbed_official 157:90e3acc479a2 1469 * @brief RS485 mode function
mbed_official 157:90e3acc479a2 1470 *
mbed_official 157:90e3acc479a2 1471 @verbatim
mbed_official 157:90e3acc479a2 1472 ===============================================================================
mbed_official 157:90e3acc479a2 1473 ##### RS485 mode functions #####
mbed_official 157:90e3acc479a2 1474 ===============================================================================
mbed_official 157:90e3acc479a2 1475 [..] This subsection provides a set of functions allowing to manage the USART
mbed_official 157:90e3acc479a2 1476 RS485 flow control.
mbed_official 157:90e3acc479a2 1477 [..] RS485 flow control (Driver enable feature) handling is possible through
mbed_official 157:90e3acc479a2 1478 the following procedure:
mbed_official 157:90e3acc479a2 1479 (#) Program the Baud rate, Word length = 8 bits, Stop bits, Parity,
mbed_official 157:90e3acc479a2 1480 Transmitter/Receiver modes and hardware flow control values using
mbed_official 157:90e3acc479a2 1481 the USART_Init() function.
mbed_official 157:90e3acc479a2 1482 (#) Enable the Driver Enable using the USART_DECmd() function.
mbed_official 157:90e3acc479a2 1483 (#) Configures the Driver Enable polarity using the USART_DEPolarityConfig()
mbed_official 157:90e3acc479a2 1484 function.
mbed_official 157:90e3acc479a2 1485 (#) Configures the Driver Enable assertion time using USART_SetDEAssertionTime()
mbed_official 157:90e3acc479a2 1486 function and deassertion time using the USART_SetDEDeassertionTime()
mbed_official 157:90e3acc479a2 1487 function.
mbed_official 157:90e3acc479a2 1488 (#) Enable the USART using the USART_Cmd() function.
mbed_official 157:90e3acc479a2 1489 [..]
mbed_official 157:90e3acc479a2 1490 (@) The assertion and dessertion times are expressed in sample time units (1/8 or
mbed_official 157:90e3acc479a2 1491 1/16 bit time, depending on the oversampling rate).
mbed_official 157:90e3acc479a2 1492
mbed_official 157:90e3acc479a2 1493 @endverbatim
mbed_official 157:90e3acc479a2 1494 * @{
mbed_official 157:90e3acc479a2 1495 */
mbed_official 157:90e3acc479a2 1496
mbed_official 157:90e3acc479a2 1497 /**
mbed_official 157:90e3acc479a2 1498 * @brief Enables or disables the USART's DE functionality.
mbed_official 157:90e3acc479a2 1499 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 1500 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 1501 * @param NewState: new state of the driver enable mode.
mbed_official 157:90e3acc479a2 1502 * This parameter can be: ENABLE or DISABLE.
mbed_official 157:90e3acc479a2 1503 * @retval None
mbed_official 157:90e3acc479a2 1504 */
mbed_official 157:90e3acc479a2 1505 void USART_DECmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official 157:90e3acc479a2 1506 {
mbed_official 157:90e3acc479a2 1507 /* Check the parameters */
mbed_official 157:90e3acc479a2 1508 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 1509 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 157:90e3acc479a2 1510 if (NewState != DISABLE)
mbed_official 157:90e3acc479a2 1511 {
mbed_official 157:90e3acc479a2 1512 /* Enable the DE functionality by setting the DEM bit in the CR3 register */
mbed_official 157:90e3acc479a2 1513 USARTx->CR3 |= USART_CR3_DEM;
mbed_official 157:90e3acc479a2 1514 }
mbed_official 157:90e3acc479a2 1515 else
mbed_official 157:90e3acc479a2 1516 {
mbed_official 157:90e3acc479a2 1517 /* Disable the DE functionality by clearing the DEM bit in the CR3 register */
mbed_official 157:90e3acc479a2 1518 USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_DEM);
mbed_official 157:90e3acc479a2 1519 }
mbed_official 157:90e3acc479a2 1520 }
mbed_official 157:90e3acc479a2 1521
mbed_official 157:90e3acc479a2 1522 /**
mbed_official 157:90e3acc479a2 1523 * @brief Configures the USART's DE polarity
mbed_official 157:90e3acc479a2 1524 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 1525 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 1526 * @param USART_DEPolarity: specifies the DE polarity.
mbed_official 157:90e3acc479a2 1527 * This parameter can be one of the following values:
mbed_official 157:90e3acc479a2 1528 * @arg USART_DEPolarity_Low
mbed_official 157:90e3acc479a2 1529 * @arg USART_DEPolarity_High
mbed_official 157:90e3acc479a2 1530 * @retval None
mbed_official 157:90e3acc479a2 1531 */
mbed_official 157:90e3acc479a2 1532 void USART_DEPolarityConfig(USART_TypeDef* USARTx, uint32_t USART_DEPolarity)
mbed_official 157:90e3acc479a2 1533 {
mbed_official 157:90e3acc479a2 1534 /* Check the parameters */
mbed_official 157:90e3acc479a2 1535 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 1536 assert_param(IS_USART_DE_POLARITY(USART_DEPolarity));
mbed_official 157:90e3acc479a2 1537
mbed_official 157:90e3acc479a2 1538 USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_DEP);
mbed_official 157:90e3acc479a2 1539 USARTx->CR3 |= USART_DEPolarity;
mbed_official 157:90e3acc479a2 1540 }
mbed_official 157:90e3acc479a2 1541
mbed_official 157:90e3acc479a2 1542 /**
mbed_official 157:90e3acc479a2 1543 * @brief Sets the specified RS485 DE assertion time
mbed_official 157:90e3acc479a2 1544 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 1545 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 1546 * @param USART_AssertionTime: specifies the time between the activation of the DE
mbed_official 157:90e3acc479a2 1547 * signal and the beginning of the start bit
mbed_official 157:90e3acc479a2 1548 * @retval None
mbed_official 157:90e3acc479a2 1549 */
mbed_official 157:90e3acc479a2 1550 void USART_SetDEAssertionTime(USART_TypeDef* USARTx, uint32_t USART_DEAssertionTime)
mbed_official 157:90e3acc479a2 1551 {
mbed_official 157:90e3acc479a2 1552 /* Check the parameters */
mbed_official 157:90e3acc479a2 1553 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 1554 assert_param(IS_USART_DE_ASSERTION_DEASSERTION_TIME(USART_DEAssertionTime));
mbed_official 157:90e3acc479a2 1555
mbed_official 157:90e3acc479a2 1556 /* Clear the DE assertion time */
mbed_official 157:90e3acc479a2 1557 USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_DEAT);
mbed_official 157:90e3acc479a2 1558 /* Set the new value for the DE assertion time */
mbed_official 157:90e3acc479a2 1559 USARTx->CR1 |=((uint32_t)USART_DEAssertionTime << (uint32_t)0x15);
mbed_official 157:90e3acc479a2 1560 }
mbed_official 157:90e3acc479a2 1561
mbed_official 157:90e3acc479a2 1562 /**
mbed_official 157:90e3acc479a2 1563 * @brief Sets the specified RS485 DE deassertion time
mbed_official 157:90e3acc479a2 1564 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 1565 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 1566 * @param USART_DeassertionTime: specifies the time between the middle of the last
mbed_official 157:90e3acc479a2 1567 * stop bit in a transmitted message and the de-activation of the DE signal
mbed_official 157:90e3acc479a2 1568 * @retval None
mbed_official 157:90e3acc479a2 1569 */
mbed_official 157:90e3acc479a2 1570 void USART_SetDEDeassertionTime(USART_TypeDef* USARTx, uint32_t USART_DEDeassertionTime)
mbed_official 157:90e3acc479a2 1571 {
mbed_official 157:90e3acc479a2 1572 /* Check the parameters */
mbed_official 157:90e3acc479a2 1573 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 1574 assert_param(IS_USART_DE_ASSERTION_DEASSERTION_TIME(USART_DEDeassertionTime));
mbed_official 157:90e3acc479a2 1575
mbed_official 157:90e3acc479a2 1576 /* Clear the DE deassertion time */
mbed_official 157:90e3acc479a2 1577 USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_DEDT);
mbed_official 157:90e3acc479a2 1578 /* Set the new value for the DE deassertion time */
mbed_official 157:90e3acc479a2 1579 USARTx->CR1 |=((uint32_t)USART_DEDeassertionTime << (uint32_t)0x10);
mbed_official 157:90e3acc479a2 1580 }
mbed_official 157:90e3acc479a2 1581
mbed_official 157:90e3acc479a2 1582 /**
mbed_official 157:90e3acc479a2 1583 * @}
mbed_official 157:90e3acc479a2 1584 */
mbed_official 157:90e3acc479a2 1585
mbed_official 157:90e3acc479a2 1586 /** @defgroup USART_Group11 DMA transfers management functions
mbed_official 157:90e3acc479a2 1587 * @brief DMA transfers management functions
mbed_official 157:90e3acc479a2 1588 *
mbed_official 157:90e3acc479a2 1589 @verbatim
mbed_official 157:90e3acc479a2 1590 ===============================================================================
mbed_official 157:90e3acc479a2 1591 ##### DMA transfers management functions #####
mbed_official 157:90e3acc479a2 1592 ===============================================================================
mbed_official 157:90e3acc479a2 1593 [..] This section provides two functions that can be used only in DMA mode.
mbed_official 157:90e3acc479a2 1594 [..] In DMA Mode, the USART communication can be managed by 2 DMA Channel
mbed_official 157:90e3acc479a2 1595 requests:
mbed_official 157:90e3acc479a2 1596 (#) USART_DMAReq_Tx: specifies the Tx buffer DMA transfer request.
mbed_official 157:90e3acc479a2 1597 (#) USART_DMAReq_Rx: specifies the Rx buffer DMA transfer request.
mbed_official 157:90e3acc479a2 1598 [..] In this Mode it is advised to use the following function:
mbed_official 157:90e3acc479a2 1599 (+) void USART_DMACmd(USART_TypeDef* USARTx, uint16_t USART_DMAReq,
mbed_official 157:90e3acc479a2 1600 FunctionalState NewState).
mbed_official 157:90e3acc479a2 1601 @endverbatim
mbed_official 157:90e3acc479a2 1602 * @{
mbed_official 157:90e3acc479a2 1603 */
mbed_official 157:90e3acc479a2 1604
mbed_official 157:90e3acc479a2 1605 /**
mbed_official 157:90e3acc479a2 1606 * @brief Enables or disables the USART's DMA interface.
mbed_official 157:90e3acc479a2 1607 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 1608 * following values: USART1 or USART2 or USART3 or UART4.
mbed_official 157:90e3acc479a2 1609 * @param USART_DMAReq: specifies the DMA request.
mbed_official 157:90e3acc479a2 1610 * This parameter can be any combination of the following values:
mbed_official 157:90e3acc479a2 1611 * @arg USART_DMAReq_Tx: USART DMA transmit request
mbed_official 157:90e3acc479a2 1612 * @arg USART_DMAReq_Rx: USART DMA receive request
mbed_official 157:90e3acc479a2 1613 * @param NewState: new state of the DMA Request sources.
mbed_official 157:90e3acc479a2 1614 * This parameter can be: ENABLE or DISABLE.
mbed_official 157:90e3acc479a2 1615 * @retval None
mbed_official 157:90e3acc479a2 1616 */
mbed_official 157:90e3acc479a2 1617 void USART_DMACmd(USART_TypeDef* USARTx, uint32_t USART_DMAReq, FunctionalState NewState)
mbed_official 157:90e3acc479a2 1618 {
mbed_official 157:90e3acc479a2 1619 /* Check the parameters */
mbed_official 157:90e3acc479a2 1620 assert_param(IS_USART_1234_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 1621 assert_param(IS_USART_DMAREQ(USART_DMAReq));
mbed_official 157:90e3acc479a2 1622 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 157:90e3acc479a2 1623
mbed_official 157:90e3acc479a2 1624 if (NewState != DISABLE)
mbed_official 157:90e3acc479a2 1625 {
mbed_official 157:90e3acc479a2 1626 /* Enable the DMA transfer for selected requests by setting the DMAT and/or
mbed_official 157:90e3acc479a2 1627 DMAR bits in the USART CR3 register */
mbed_official 157:90e3acc479a2 1628 USARTx->CR3 |= USART_DMAReq;
mbed_official 157:90e3acc479a2 1629 }
mbed_official 157:90e3acc479a2 1630 else
mbed_official 157:90e3acc479a2 1631 {
mbed_official 157:90e3acc479a2 1632 /* Disable the DMA transfer for selected requests by clearing the DMAT and/or
mbed_official 157:90e3acc479a2 1633 DMAR bits in the USART CR3 register */
mbed_official 157:90e3acc479a2 1634 USARTx->CR3 &= (uint32_t)~USART_DMAReq;
mbed_official 157:90e3acc479a2 1635 }
mbed_official 157:90e3acc479a2 1636 }
mbed_official 157:90e3acc479a2 1637
mbed_official 157:90e3acc479a2 1638 /**
mbed_official 157:90e3acc479a2 1639 * @brief Enables or disables the USART's DMA interface when reception error occurs.
mbed_official 157:90e3acc479a2 1640 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 1641 * following values: USART1 or USART2 or USART3 or UART4.
mbed_official 157:90e3acc479a2 1642 * @param USART_DMAOnError: specifies the DMA status in case of reception error.
mbed_official 157:90e3acc479a2 1643 * This parameter can be any combination of the following values:
mbed_official 157:90e3acc479a2 1644 * @arg USART_DMAOnError_Enable: DMA receive request enabled when the USART DMA
mbed_official 157:90e3acc479a2 1645 * reception error is asserted.
mbed_official 157:90e3acc479a2 1646 * @arg USART_DMAOnError_Disable: DMA receive request disabled when the USART DMA
mbed_official 157:90e3acc479a2 1647 * reception error is asserted.
mbed_official 157:90e3acc479a2 1648 * @retval None
mbed_official 157:90e3acc479a2 1649 */
mbed_official 157:90e3acc479a2 1650 void USART_DMAReceptionErrorConfig(USART_TypeDef* USARTx, uint32_t USART_DMAOnError)
mbed_official 157:90e3acc479a2 1651 {
mbed_official 157:90e3acc479a2 1652 /* Check the parameters */
mbed_official 157:90e3acc479a2 1653 assert_param(IS_USART_1234_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 1654 assert_param(IS_USART_DMAONERROR(USART_DMAOnError));
mbed_official 157:90e3acc479a2 1655
mbed_official 157:90e3acc479a2 1656 /* Clear the DMA Reception error detection bit */
mbed_official 157:90e3acc479a2 1657 USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_DDRE);
mbed_official 157:90e3acc479a2 1658 /* Set the new value for the DMA Reception error detection bit */
mbed_official 157:90e3acc479a2 1659 USARTx->CR3 |= USART_DMAOnError;
mbed_official 157:90e3acc479a2 1660 }
mbed_official 157:90e3acc479a2 1661
mbed_official 157:90e3acc479a2 1662 /**
mbed_official 157:90e3acc479a2 1663 * @}
mbed_official 157:90e3acc479a2 1664 */
mbed_official 157:90e3acc479a2 1665
mbed_official 157:90e3acc479a2 1666 /** @defgroup USART_Group12 Interrupts and flags management functions
mbed_official 157:90e3acc479a2 1667 * @brief Interrupts and flags management functions
mbed_official 157:90e3acc479a2 1668 *
mbed_official 157:90e3acc479a2 1669 @verbatim
mbed_official 157:90e3acc479a2 1670 ===============================================================================
mbed_official 157:90e3acc479a2 1671 ##### Interrupts and flags management functions #####
mbed_official 157:90e3acc479a2 1672 ===============================================================================
mbed_official 157:90e3acc479a2 1673 [..] This subsection provides a set of functions allowing to configure the
mbed_official 157:90e3acc479a2 1674 USART Interrupts sources, Requests and check or clear the flags or pending bits status.
mbed_official 157:90e3acc479a2 1675 The user should identify which mode will be used in his application to
mbed_official 157:90e3acc479a2 1676 manage the communication: Polling mode, Interrupt mode.
mbed_official 157:90e3acc479a2 1677
mbed_official 157:90e3acc479a2 1678 *** Polling Mode ***
mbed_official 157:90e3acc479a2 1679 ====================
mbed_official 157:90e3acc479a2 1680 [..] In Polling Mode, the SPI communication can be managed by these flags:
mbed_official 157:90e3acc479a2 1681 (#) USART_FLAG_REACK: to indicate the status of the Receive Enable
mbed_official 157:90e3acc479a2 1682 acknowledge flag
mbed_official 157:90e3acc479a2 1683 (#) USART_FLAG_TEACK: to indicate the status of the Transmit Enable
mbed_official 157:90e3acc479a2 1684 acknowledge flag.
mbed_official 157:90e3acc479a2 1685 (#) USART_FLAG_WUF: to indicate the status of the Wake up flag.
mbed_official 157:90e3acc479a2 1686 (#) USART_FLAG_RWU: to indicate the status of the Receive Wake up flag.
mbed_official 157:90e3acc479a2 1687 (#) USART_FLAG_SBK: to indicate the status of the Send Break flag.
mbed_official 157:90e3acc479a2 1688 (#) USART_FLAG_CMF: to indicate the status of the Character match flag.
mbed_official 157:90e3acc479a2 1689 (#) USART_FLAG_BUSY: to indicate the status of the Busy flag.
mbed_official 157:90e3acc479a2 1690 (#) USART_FLAG_ABRF: to indicate the status of the Auto baud rate flag.
mbed_official 157:90e3acc479a2 1691 (#) USART_FLAG_ABRE: to indicate the status of the Auto baud rate error flag.
mbed_official 157:90e3acc479a2 1692 (#) USART_FLAG_EOBF: to indicate the status of the End of block flag.
mbed_official 157:90e3acc479a2 1693 (#) USART_FLAG_RTOF: to indicate the status of the Receive time out flag.
mbed_official 157:90e3acc479a2 1694 (#) USART_FLAG_nCTSS: to indicate the status of the Inverted nCTS input
mbed_official 157:90e3acc479a2 1695 bit status.
mbed_official 157:90e3acc479a2 1696 (#) USART_FLAG_TXE: to indicate the status of the transmit buffer register.
mbed_official 157:90e3acc479a2 1697 (#) USART_FLAG_RXNE: to indicate the status of the receive buffer register.
mbed_official 157:90e3acc479a2 1698 (#) USART_FLAG_TC: to indicate the status of the transmit operation.
mbed_official 157:90e3acc479a2 1699 (#) USART_FLAG_IDLE: to indicate the status of the Idle Line.
mbed_official 157:90e3acc479a2 1700 (#) USART_FLAG_CTS: to indicate the status of the nCTS input.
mbed_official 157:90e3acc479a2 1701 (#) USART_FLAG_LBD: to indicate the status of the LIN break detection.
mbed_official 157:90e3acc479a2 1702 (#) USART_FLAG_NE: to indicate if a noise error occur.
mbed_official 157:90e3acc479a2 1703 (#) USART_FLAG_FE: to indicate if a frame error occur.
mbed_official 157:90e3acc479a2 1704 (#) USART_FLAG_PE: to indicate if a parity error occur.
mbed_official 157:90e3acc479a2 1705 (#) USART_FLAG_ORE: to indicate if an Overrun error occur.
mbed_official 157:90e3acc479a2 1706 [..] In this Mode it is advised to use the following functions:
mbed_official 157:90e3acc479a2 1707 (+) FlagStatus USART_GetFlagStatus(USART_TypeDef* USARTx, uint16_t USART_FLAG).
mbed_official 157:90e3acc479a2 1708 (+) void USART_ClearFlag(USART_TypeDef* USARTx, uint16_t USART_FLAG).
mbed_official 157:90e3acc479a2 1709
mbed_official 157:90e3acc479a2 1710 *** Interrupt Mode ***
mbed_official 157:90e3acc479a2 1711 ======================
mbed_official 157:90e3acc479a2 1712 [..] In Interrupt Mode, the USART communication can be managed by 8 interrupt
mbed_official 157:90e3acc479a2 1713 sources and 10 pending bits:
mbed_official 157:90e3acc479a2 1714 (+) Pending Bits:
mbed_official 157:90e3acc479a2 1715 (##) USART_IT_WU: to indicate the status of the Wake up interrupt.
mbed_official 157:90e3acc479a2 1716 (##) USART_IT_CM: to indicate the status of Character match interrupt.
mbed_official 157:90e3acc479a2 1717 (##) USART_IT_EOB: to indicate the status of End of block interrupt.
mbed_official 157:90e3acc479a2 1718 (##) USART_IT_RTO: to indicate the status of Receive time out interrupt.
mbed_official 157:90e3acc479a2 1719 (##) USART_IT_CTS: to indicate the status of CTS change interrupt.
mbed_official 157:90e3acc479a2 1720 (##) USART_IT_LBD: to indicate the status of LIN Break detection interrupt.
mbed_official 157:90e3acc479a2 1721 (##) USART_IT_TC: to indicate the status of Transmission complete interrupt.
mbed_official 157:90e3acc479a2 1722 (##) USART_IT_IDLE: to indicate the status of IDLE line detected interrupt.
mbed_official 157:90e3acc479a2 1723 (##) USART_IT_ORE: to indicate the status of OverRun Error interrupt.
mbed_official 157:90e3acc479a2 1724 (##) USART_IT_NE: to indicate the status of Noise Error interrupt.
mbed_official 157:90e3acc479a2 1725 (##) USART_IT_FE: to indicate the status of Framing Error interrupt.
mbed_official 157:90e3acc479a2 1726 (##) USART_IT_PE: to indicate the status of Parity Error interrupt.
mbed_official 157:90e3acc479a2 1727
mbed_official 157:90e3acc479a2 1728 (+) Interrupt Source:
mbed_official 157:90e3acc479a2 1729 (##) USART_IT_WU: specifies the interrupt source for Wake up interrupt.
mbed_official 157:90e3acc479a2 1730 (##) USART_IT_CM: specifies the interrupt source for Character match
mbed_official 157:90e3acc479a2 1731 interrupt.
mbed_official 157:90e3acc479a2 1732 (##) USART_IT_EOB: specifies the interrupt source for End of block
mbed_official 157:90e3acc479a2 1733 interrupt.
mbed_official 157:90e3acc479a2 1734 (##) USART_IT_RTO: specifies the interrupt source for Receive time-out
mbed_official 157:90e3acc479a2 1735 interrupt.
mbed_official 157:90e3acc479a2 1736 (##) USART_IT_CTS: specifies the interrupt source for CTS change interrupt.
mbed_official 157:90e3acc479a2 1737 (##) USART_IT_LBD: specifies the interrupt source for LIN Break
mbed_official 157:90e3acc479a2 1738 detection interrupt.
mbed_official 157:90e3acc479a2 1739 (##) USART_IT_TXE: specifies the interrupt source for Tansmit Data
mbed_official 157:90e3acc479a2 1740 Register empty interrupt.
mbed_official 157:90e3acc479a2 1741 (##) USART_IT_TC: specifies the interrupt source for Transmission
mbed_official 157:90e3acc479a2 1742 complete interrupt.
mbed_official 157:90e3acc479a2 1743 (##) USART_IT_RXNE: specifies the interrupt source for Receive Data
mbed_official 157:90e3acc479a2 1744 register not empty interrupt.
mbed_official 157:90e3acc479a2 1745 (##) USART_IT_IDLE: specifies the interrupt source for Idle line
mbed_official 157:90e3acc479a2 1746 detection interrupt.
mbed_official 157:90e3acc479a2 1747 (##) USART_IT_PE: specifies the interrupt source for Parity Error interrupt.
mbed_official 157:90e3acc479a2 1748 (##) USART_IT_ERR: specifies the interrupt source for Error interrupt
mbed_official 157:90e3acc479a2 1749 (Frame error, noise error, overrun error)
mbed_official 157:90e3acc479a2 1750 -@@- Some parameters are coded in order to use them as interrupt
mbed_official 157:90e3acc479a2 1751 source or as pending bits.
mbed_official 157:90e3acc479a2 1752 [..] In this Mode it is advised to use the following functions:
mbed_official 157:90e3acc479a2 1753 (+) void USART_ITConfig(USART_TypeDef* USARTx, uint16_t USART_IT, FunctionalState NewState).
mbed_official 157:90e3acc479a2 1754 (+) ITStatus USART_GetITStatus(USART_TypeDef* USARTx, uint16_t USART_IT).
mbed_official 157:90e3acc479a2 1755 (+) void USART_ClearITPendingBit(USART_TypeDef* USARTx, uint16_t USART_IT).
mbed_official 157:90e3acc479a2 1756
mbed_official 157:90e3acc479a2 1757 @endverbatim
mbed_official 157:90e3acc479a2 1758 * @{
mbed_official 157:90e3acc479a2 1759 */
mbed_official 157:90e3acc479a2 1760
mbed_official 157:90e3acc479a2 1761 /**
mbed_official 157:90e3acc479a2 1762 * @brief Enables or disables the specified USART interrupts.
mbed_official 157:90e3acc479a2 1763 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 1764 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 1765 * @param USART_IT: specifies the USART interrupt sources to be enabled or disabled.
mbed_official 157:90e3acc479a2 1766 * This parameter can be one of the following values:
mbed_official 157:90e3acc479a2 1767 * @arg USART_IT_WU: Wake up interrupt.
mbed_official 157:90e3acc479a2 1768 * @arg USART_IT_CM: Character match interrupt.
mbed_official 157:90e3acc479a2 1769 * @arg USART_IT_EOB: End of block interrupt.
mbed_official 157:90e3acc479a2 1770 * @arg USART_IT_RTO: Receive time out interrupt.
mbed_official 157:90e3acc479a2 1771 * @arg USART_IT_CTS: CTS change interrupt.
mbed_official 157:90e3acc479a2 1772 * @arg USART_IT_LBD: LIN Break detection interrupt.
mbed_official 157:90e3acc479a2 1773 * @arg USART_IT_TXE: Tansmit Data Register empty interrupt.
mbed_official 157:90e3acc479a2 1774 * @arg USART_IT_TC: Transmission complete interrupt.
mbed_official 157:90e3acc479a2 1775 * @arg USART_IT_RXNE: Receive Data register not empty interrupt.
mbed_official 157:90e3acc479a2 1776 * @arg USART_IT_IDLE: Idle line detection interrupt.
mbed_official 157:90e3acc479a2 1777 * @arg USART_IT_PE: Parity Error interrupt.
mbed_official 157:90e3acc479a2 1778 * @arg USART_IT_ERR: Error interrupt(Frame error, noise error, overrun error)
mbed_official 157:90e3acc479a2 1779 * @param NewState: new state of the specified USARTx interrupts.
mbed_official 157:90e3acc479a2 1780 * This parameter can be: ENABLE or DISABLE.
mbed_official 157:90e3acc479a2 1781 * @retval None
mbed_official 157:90e3acc479a2 1782 */
mbed_official 157:90e3acc479a2 1783 void USART_ITConfig(USART_TypeDef* USARTx, uint32_t USART_IT, FunctionalState NewState)
mbed_official 157:90e3acc479a2 1784 {
mbed_official 157:90e3acc479a2 1785 uint32_t usartreg = 0, itpos = 0, itmask = 0;
mbed_official 157:90e3acc479a2 1786 uint32_t usartxbase = 0;
mbed_official 157:90e3acc479a2 1787 /* Check the parameters */
mbed_official 157:90e3acc479a2 1788 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 1789 assert_param(IS_USART_CONFIG_IT(USART_IT));
mbed_official 157:90e3acc479a2 1790 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 157:90e3acc479a2 1791
mbed_official 157:90e3acc479a2 1792 usartxbase = (uint32_t)USARTx;
mbed_official 157:90e3acc479a2 1793
mbed_official 157:90e3acc479a2 1794 /* Get the USART register index */
mbed_official 157:90e3acc479a2 1795 usartreg = (((uint16_t)USART_IT) >> 0x08);
mbed_official 157:90e3acc479a2 1796
mbed_official 157:90e3acc479a2 1797 /* Get the interrupt position */
mbed_official 157:90e3acc479a2 1798 itpos = USART_IT & IT_MASK;
mbed_official 157:90e3acc479a2 1799 itmask = (((uint32_t)0x01) << itpos);
mbed_official 157:90e3acc479a2 1800
mbed_official 157:90e3acc479a2 1801 if (usartreg == 0x02) /* The IT is in CR2 register */
mbed_official 157:90e3acc479a2 1802 {
mbed_official 157:90e3acc479a2 1803 usartxbase += 0x04;
mbed_official 157:90e3acc479a2 1804 }
mbed_official 157:90e3acc479a2 1805 else if (usartreg == 0x03) /* The IT is in CR3 register */
mbed_official 157:90e3acc479a2 1806 {
mbed_official 157:90e3acc479a2 1807 usartxbase += 0x08;
mbed_official 157:90e3acc479a2 1808 }
mbed_official 157:90e3acc479a2 1809 else /* The IT is in CR1 register */
mbed_official 157:90e3acc479a2 1810 {
mbed_official 157:90e3acc479a2 1811 }
mbed_official 157:90e3acc479a2 1812 if (NewState != DISABLE)
mbed_official 157:90e3acc479a2 1813 {
mbed_official 157:90e3acc479a2 1814 *(__IO uint32_t*)usartxbase |= itmask;
mbed_official 157:90e3acc479a2 1815 }
mbed_official 157:90e3acc479a2 1816 else
mbed_official 157:90e3acc479a2 1817 {
mbed_official 157:90e3acc479a2 1818 *(__IO uint32_t*)usartxbase &= ~itmask;
mbed_official 157:90e3acc479a2 1819 }
mbed_official 157:90e3acc479a2 1820 }
mbed_official 157:90e3acc479a2 1821
mbed_official 157:90e3acc479a2 1822 /**
mbed_official 157:90e3acc479a2 1823 * @brief Enables the specified USART's Request.
mbed_official 157:90e3acc479a2 1824 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 1825 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 1826 * @param USART_Request: specifies the USART request.
mbed_official 157:90e3acc479a2 1827 * This parameter can be any combination of the following values:
mbed_official 157:90e3acc479a2 1828 * @arg USART_Request_TXFRQ: Transmit data flush ReQuest
mbed_official 157:90e3acc479a2 1829 * @arg USART_Request_RXFRQ: Receive data flush ReQuest
mbed_official 157:90e3acc479a2 1830 * @arg USART_Request_MMRQ: Mute Mode ReQuest
mbed_official 157:90e3acc479a2 1831 * @arg USART_Request_SBKRQ: Send Break ReQuest
mbed_official 157:90e3acc479a2 1832 * @arg USART_Request_ABRRQ: Auto Baud Rate ReQuest
mbed_official 157:90e3acc479a2 1833 * @param NewState: new state of the DMA interface when reception error occurs.
mbed_official 157:90e3acc479a2 1834 * This parameter can be: ENABLE or DISABLE.
mbed_official 157:90e3acc479a2 1835 * @retval None
mbed_official 157:90e3acc479a2 1836 */
mbed_official 157:90e3acc479a2 1837 void USART_RequestCmd(USART_TypeDef* USARTx, uint32_t USART_Request, FunctionalState NewState)
mbed_official 157:90e3acc479a2 1838 {
mbed_official 157:90e3acc479a2 1839 /* Check the parameters */
mbed_official 157:90e3acc479a2 1840 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 1841 assert_param(IS_USART_REQUEST(USART_Request));
mbed_official 157:90e3acc479a2 1842 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 157:90e3acc479a2 1843
mbed_official 157:90e3acc479a2 1844 if (NewState != DISABLE)
mbed_official 157:90e3acc479a2 1845 {
mbed_official 157:90e3acc479a2 1846 /* Enable the USART ReQuest by setting the dedicated request bit in the RQR
mbed_official 157:90e3acc479a2 1847 register.*/
mbed_official 157:90e3acc479a2 1848 USARTx->RQR |= USART_Request;
mbed_official 157:90e3acc479a2 1849 }
mbed_official 157:90e3acc479a2 1850 else
mbed_official 157:90e3acc479a2 1851 {
mbed_official 157:90e3acc479a2 1852 /* Disable the USART ReQuest by clearing the dedicated request bit in the RQR
mbed_official 157:90e3acc479a2 1853 register.*/
mbed_official 157:90e3acc479a2 1854 USARTx->RQR &= (uint32_t)~USART_Request;
mbed_official 157:90e3acc479a2 1855 }
mbed_official 157:90e3acc479a2 1856 }
mbed_official 157:90e3acc479a2 1857
mbed_official 157:90e3acc479a2 1858 /**
mbed_official 157:90e3acc479a2 1859 * @brief Enables or disables the USART's Overrun detection.
mbed_official 157:90e3acc479a2 1860 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 1861 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 1862 * @param USART_OVRDetection: specifies the OVR detection status in case of OVR error.
mbed_official 157:90e3acc479a2 1863 * This parameter can be any combination of the following values:
mbed_official 157:90e3acc479a2 1864 * @arg USART_OVRDetection_Enable: OVR error detection enabled when the USART OVR error
mbed_official 157:90e3acc479a2 1865 * is asserted.
mbed_official 157:90e3acc479a2 1866 * @arg USART_OVRDetection_Disable: OVR error detection disabled when the USART OVR error
mbed_official 157:90e3acc479a2 1867 * is asserted.
mbed_official 157:90e3acc479a2 1868 * @retval None
mbed_official 157:90e3acc479a2 1869 */
mbed_official 157:90e3acc479a2 1870 void USART_OverrunDetectionConfig(USART_TypeDef* USARTx, uint32_t USART_OVRDetection)
mbed_official 157:90e3acc479a2 1871 {
mbed_official 157:90e3acc479a2 1872 /* Check the parameters */
mbed_official 157:90e3acc479a2 1873 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 1874 assert_param(IS_USART_OVRDETECTION(USART_OVRDetection));
mbed_official 157:90e3acc479a2 1875
mbed_official 157:90e3acc479a2 1876 /* Clear the OVR detection bit */
mbed_official 157:90e3acc479a2 1877 USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_OVRDIS);
mbed_official 157:90e3acc479a2 1878 /* Set the new value for the OVR detection bit */
mbed_official 157:90e3acc479a2 1879 USARTx->CR3 |= USART_OVRDetection;
mbed_official 157:90e3acc479a2 1880 }
mbed_official 157:90e3acc479a2 1881
mbed_official 157:90e3acc479a2 1882 /**
mbed_official 157:90e3acc479a2 1883 * @brief Checks whether the specified USART flag is set or not.
mbed_official 157:90e3acc479a2 1884 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 1885 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 1886 * @param USART_FLAG: specifies the flag to check.
mbed_official 157:90e3acc479a2 1887 * This parameter can be one of the following values:
mbed_official 157:90e3acc479a2 1888 * @arg USART_FLAG_REACK: Receive Enable acknowledge flag.
mbed_official 157:90e3acc479a2 1889 * @arg USART_FLAG_TEACK: Transmit Enable acknowledge flag.
mbed_official 157:90e3acc479a2 1890 * @arg USART_FLAG_WUF: Wake up flag.
mbed_official 157:90e3acc479a2 1891 * @arg USART_FLAG_RWU: Receive Wake up flag.
mbed_official 157:90e3acc479a2 1892 * @arg USART_FLAG_SBK: Send Break flag.
mbed_official 157:90e3acc479a2 1893 * @arg USART_FLAG_CMF: Character match flag.
mbed_official 157:90e3acc479a2 1894 * @arg USART_FLAG_BUSY: Busy flag.
mbed_official 157:90e3acc479a2 1895 * @arg USART_FLAG_ABRF: Auto baud rate flag.
mbed_official 157:90e3acc479a2 1896 * @arg USART_FLAG_ABRE: Auto baud rate error flag.
mbed_official 157:90e3acc479a2 1897 * @arg USART_FLAG_EOBF: End of block flag.
mbed_official 157:90e3acc479a2 1898 * @arg USART_FLAG_RTOF: Receive time out flag.
mbed_official 157:90e3acc479a2 1899 * @arg USART_FLAG_nCTSS: Inverted nCTS input bit status.
mbed_official 157:90e3acc479a2 1900 * @arg USART_FLAG_CTS: CTS Change flag.
mbed_official 157:90e3acc479a2 1901 * @arg USART_FLAG_LBD: LIN Break detection flag.
mbed_official 157:90e3acc479a2 1902 * @arg USART_FLAG_TXE: Transmit data register empty flag.
mbed_official 157:90e3acc479a2 1903 * @arg USART_FLAG_TC: Transmission Complete flag.
mbed_official 157:90e3acc479a2 1904 * @arg USART_FLAG_RXNE: Receive data register not empty flag.
mbed_official 157:90e3acc479a2 1905 * @arg USART_FLAG_IDLE: Idle Line detection flag.
mbed_official 157:90e3acc479a2 1906 * @arg USART_FLAG_ORE: OverRun Error flag.
mbed_official 157:90e3acc479a2 1907 * @arg USART_FLAG_NE: Noise Error flag.
mbed_official 157:90e3acc479a2 1908 * @arg USART_FLAG_FE: Framing Error flag.
mbed_official 157:90e3acc479a2 1909 * @arg USART_FLAG_PE: Parity Error flag.
mbed_official 157:90e3acc479a2 1910 * @retval The new state of USART_FLAG (SET or RESET).
mbed_official 157:90e3acc479a2 1911 */
mbed_official 157:90e3acc479a2 1912 FlagStatus USART_GetFlagStatus(USART_TypeDef* USARTx, uint32_t USART_FLAG)
mbed_official 157:90e3acc479a2 1913 {
mbed_official 157:90e3acc479a2 1914 FlagStatus bitstatus = RESET;
mbed_official 157:90e3acc479a2 1915 /* Check the parameters */
mbed_official 157:90e3acc479a2 1916 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 1917 assert_param(IS_USART_FLAG(USART_FLAG));
mbed_official 157:90e3acc479a2 1918
mbed_official 157:90e3acc479a2 1919 if ((USARTx->ISR & USART_FLAG) != (uint16_t)RESET)
mbed_official 157:90e3acc479a2 1920 {
mbed_official 157:90e3acc479a2 1921 bitstatus = SET;
mbed_official 157:90e3acc479a2 1922 }
mbed_official 157:90e3acc479a2 1923 else
mbed_official 157:90e3acc479a2 1924 {
mbed_official 157:90e3acc479a2 1925 bitstatus = RESET;
mbed_official 157:90e3acc479a2 1926 }
mbed_official 157:90e3acc479a2 1927 return bitstatus;
mbed_official 157:90e3acc479a2 1928 }
mbed_official 157:90e3acc479a2 1929
mbed_official 157:90e3acc479a2 1930 /**
mbed_official 157:90e3acc479a2 1931 * @brief Clears the USARTx's pending flags.
mbed_official 157:90e3acc479a2 1932 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 1933 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 1934 * @param USART_FLAG: specifies the flag to clear.
mbed_official 157:90e3acc479a2 1935 * This parameter can be any combination of the following values:
mbed_official 157:90e3acc479a2 1936 * @arg USART_FLAG_WUF: Wake up flag.
mbed_official 157:90e3acc479a2 1937 * @arg USART_FLAG_CMF: Character match flag.
mbed_official 157:90e3acc479a2 1938 * @arg USART_FLAG_EOBF: End of block flag.
mbed_official 157:90e3acc479a2 1939 * @arg USART_FLAG_RTOF: Receive time out flag.
mbed_official 157:90e3acc479a2 1940 * @arg USART_FLAG_CTS: CTS Change flag.
mbed_official 157:90e3acc479a2 1941 * @arg USART_FLAG_LBD: LIN Break detection flag.
mbed_official 157:90e3acc479a2 1942 * @arg USART_FLAG_TC: Transmission Complete flag.
mbed_official 157:90e3acc479a2 1943 * @arg USART_FLAG_IDLE: IDLE line detected flag.
mbed_official 157:90e3acc479a2 1944 * @arg USART_FLAG_ORE: OverRun Error flag.
mbed_official 157:90e3acc479a2 1945 * @arg USART_FLAG_NE: Noise Error flag.
mbed_official 157:90e3acc479a2 1946 * @arg USART_FLAG_FE: Framing Error flag.
mbed_official 157:90e3acc479a2 1947 * @arg USART_FLAG_PE: Parity Errorflag.
mbed_official 157:90e3acc479a2 1948 *
mbed_official 157:90e3acc479a2 1949 * @note
mbed_official 157:90e3acc479a2 1950 * - RXNE pending bit is cleared by a read to the USART_RDR register
mbed_official 157:90e3acc479a2 1951 * (USART_ReceiveData()) or by writing 1 to the RXFRQ in the register USART_RQR
mbed_official 157:90e3acc479a2 1952 * (USART_RequestCmd()).
mbed_official 157:90e3acc479a2 1953 * - TC flag can be also cleared by software sequence: a read operation to
mbed_official 157:90e3acc479a2 1954 * USART_SR register (USART_GetFlagStatus()) followed by a write operation
mbed_official 157:90e3acc479a2 1955 * to USART_TDR register (USART_SendData()).
mbed_official 157:90e3acc479a2 1956 * - TXE flag is cleared by a write to the USART_TDR register
mbed_official 157:90e3acc479a2 1957 * (USART_SendData()) or by writing 1 to the TXFRQ in the register USART_RQR
mbed_official 157:90e3acc479a2 1958 * (USART_RequestCmd()).
mbed_official 157:90e3acc479a2 1959 * - SBKF flag is cleared by 1 to the SBKRQ in the register USART_RQR
mbed_official 157:90e3acc479a2 1960 * (USART_RequestCmd()).
mbed_official 157:90e3acc479a2 1961 * @retval None
mbed_official 157:90e3acc479a2 1962 */
mbed_official 157:90e3acc479a2 1963 void USART_ClearFlag(USART_TypeDef* USARTx, uint32_t USART_FLAG)
mbed_official 157:90e3acc479a2 1964 {
mbed_official 157:90e3acc479a2 1965 /* Check the parameters */
mbed_official 157:90e3acc479a2 1966 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 1967 assert_param(IS_USART_CLEAR_FLAG(USART_FLAG));
mbed_official 157:90e3acc479a2 1968
mbed_official 157:90e3acc479a2 1969 USARTx->ICR = USART_FLAG;
mbed_official 157:90e3acc479a2 1970 }
mbed_official 157:90e3acc479a2 1971
mbed_official 157:90e3acc479a2 1972 /**
mbed_official 157:90e3acc479a2 1973 * @brief Checks whether the specified USART interrupt has occurred or not.
mbed_official 157:90e3acc479a2 1974 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 1975 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 1976 * @param USART_IT: specifies the USART interrupt source to check.
mbed_official 157:90e3acc479a2 1977 * This parameter can be one of the following values:
mbed_official 157:90e3acc479a2 1978 * @arg USART_IT_WU: Wake up interrupt.
mbed_official 157:90e3acc479a2 1979 * @arg USART_IT_CM: Character match interrupt.
mbed_official 157:90e3acc479a2 1980 * @arg USART_IT_EOB: End of block interrupt.
mbed_official 157:90e3acc479a2 1981 * @arg USART_IT_RTO: Receive time out interrupt.
mbed_official 157:90e3acc479a2 1982 * @arg USART_IT_CTS: CTS change interrupt.
mbed_official 157:90e3acc479a2 1983 * @arg USART_IT_LBD: LIN Break detection interrupt.
mbed_official 157:90e3acc479a2 1984 * @arg USART_IT_TXE: Tansmit Data Register empty interrupt.
mbed_official 157:90e3acc479a2 1985 * @arg USART_IT_TC: Transmission complete interrupt.
mbed_official 157:90e3acc479a2 1986 * @arg USART_IT_RXNE: Receive Data register not empty interrupt.
mbed_official 157:90e3acc479a2 1987 * @arg USART_IT_IDLE: Idle line detection interrupt.
mbed_official 157:90e3acc479a2 1988 * @arg USART_IT_ORE: OverRun Error interrupt.
mbed_official 157:90e3acc479a2 1989 * @arg USART_IT_NE: Noise Error interrupt.
mbed_official 157:90e3acc479a2 1990 * @arg USART_IT_FE: Framing Error interrupt.
mbed_official 157:90e3acc479a2 1991 * @arg USART_IT_PE: Parity Error interrupt.
mbed_official 157:90e3acc479a2 1992 * @retval The new state of USART_IT (SET or RESET).
mbed_official 157:90e3acc479a2 1993 */
mbed_official 157:90e3acc479a2 1994 ITStatus USART_GetITStatus(USART_TypeDef* USARTx, uint32_t USART_IT)
mbed_official 157:90e3acc479a2 1995 {
mbed_official 157:90e3acc479a2 1996 uint32_t bitpos = 0, itmask = 0, usartreg = 0;
mbed_official 157:90e3acc479a2 1997 ITStatus bitstatus = RESET;
mbed_official 157:90e3acc479a2 1998 /* Check the parameters */
mbed_official 157:90e3acc479a2 1999 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 2000 assert_param(IS_USART_GET_IT(USART_IT));
mbed_official 157:90e3acc479a2 2001
mbed_official 157:90e3acc479a2 2002 /* Get the USART register index */
mbed_official 157:90e3acc479a2 2003 usartreg = (((uint16_t)USART_IT) >> 0x08);
mbed_official 157:90e3acc479a2 2004 /* Get the interrupt position */
mbed_official 157:90e3acc479a2 2005 itmask = USART_IT & IT_MASK;
mbed_official 157:90e3acc479a2 2006 itmask = (uint32_t)0x01 << itmask;
mbed_official 157:90e3acc479a2 2007
mbed_official 157:90e3acc479a2 2008 if (usartreg == 0x01) /* The IT is in CR1 register */
mbed_official 157:90e3acc479a2 2009 {
mbed_official 157:90e3acc479a2 2010 itmask &= USARTx->CR1;
mbed_official 157:90e3acc479a2 2011 }
mbed_official 157:90e3acc479a2 2012 else if (usartreg == 0x02) /* The IT is in CR2 register */
mbed_official 157:90e3acc479a2 2013 {
mbed_official 157:90e3acc479a2 2014 itmask &= USARTx->CR2;
mbed_official 157:90e3acc479a2 2015 }
mbed_official 157:90e3acc479a2 2016 else /* The IT is in CR3 register */
mbed_official 157:90e3acc479a2 2017 {
mbed_official 157:90e3acc479a2 2018 itmask &= USARTx->CR3;
mbed_official 157:90e3acc479a2 2019 }
mbed_official 157:90e3acc479a2 2020
mbed_official 157:90e3acc479a2 2021 bitpos = USART_IT >> 0x10;
mbed_official 157:90e3acc479a2 2022 bitpos = (uint32_t)0x01 << bitpos;
mbed_official 157:90e3acc479a2 2023 bitpos &= USARTx->ISR;
mbed_official 157:90e3acc479a2 2024 if ((itmask != (uint16_t)RESET)&&(bitpos != (uint16_t)RESET))
mbed_official 157:90e3acc479a2 2025 {
mbed_official 157:90e3acc479a2 2026 bitstatus = SET;
mbed_official 157:90e3acc479a2 2027 }
mbed_official 157:90e3acc479a2 2028 else
mbed_official 157:90e3acc479a2 2029 {
mbed_official 157:90e3acc479a2 2030 bitstatus = RESET;
mbed_official 157:90e3acc479a2 2031 }
mbed_official 157:90e3acc479a2 2032
mbed_official 157:90e3acc479a2 2033 return bitstatus;
mbed_official 157:90e3acc479a2 2034 }
mbed_official 157:90e3acc479a2 2035
mbed_official 157:90e3acc479a2 2036 /**
mbed_official 157:90e3acc479a2 2037 * @brief Clears the USARTx's interrupt pending bits.
mbed_official 157:90e3acc479a2 2038 * @param USARTx: Select the USART peripheral. This parameter can be one of the
mbed_official 157:90e3acc479a2 2039 * following values: USART1 or USART2 or USART3 or UART4 or UART5.
mbed_official 157:90e3acc479a2 2040 * @param USART_IT: specifies the interrupt pending bit to clear.
mbed_official 157:90e3acc479a2 2041 * This parameter can be one of the following values:
mbed_official 157:90e3acc479a2 2042 * @arg USART_IT_WU: Wake up interrupt.
mbed_official 157:90e3acc479a2 2043 * @arg USART_IT_CM: Character match interrupt.
mbed_official 157:90e3acc479a2 2044 * @arg USART_IT_EOB: End of block interrupt.
mbed_official 157:90e3acc479a2 2045 * @arg USART_IT_RTO: Receive time out interrupt.
mbed_official 157:90e3acc479a2 2046 * @arg USART_IT_CTS: CTS change interrupt.
mbed_official 157:90e3acc479a2 2047 * @arg USART_IT_LBD: LIN Break detection interrupt.
mbed_official 157:90e3acc479a2 2048 * @arg USART_IT_TC: Transmission complete interrupt.
mbed_official 157:90e3acc479a2 2049 * @arg USART_IT_IDLE: IDLE line detected interrupt.
mbed_official 157:90e3acc479a2 2050 * @arg USART_IT_ORE: OverRun Error interrupt.
mbed_official 157:90e3acc479a2 2051 * @arg USART_IT_NE: Noise Error interrupt.
mbed_official 157:90e3acc479a2 2052 * @arg USART_IT_FE: Framing Error interrupt.
mbed_official 157:90e3acc479a2 2053 * @arg USART_IT_PE: Parity Error interrupt.
mbed_official 157:90e3acc479a2 2054 * @note
mbed_official 157:90e3acc479a2 2055 * - RXNE pending bit is cleared by a read to the USART_RDR register
mbed_official 157:90e3acc479a2 2056 * (USART_ReceiveData()) or by writing 1 to the RXFRQ in the register USART_RQR
mbed_official 157:90e3acc479a2 2057 * (USART_RequestCmd()).
mbed_official 157:90e3acc479a2 2058 * - TC pending bit can be also cleared by software sequence: a read
mbed_official 157:90e3acc479a2 2059 * operation to USART_SR register (USART_GetITStatus()) followed by a write
mbed_official 157:90e3acc479a2 2060 * operation to USART_TDR register (USART_SendData()).
mbed_official 157:90e3acc479a2 2061 * - TXE pending bit is cleared by a write to the USART_TDR register
mbed_official 157:90e3acc479a2 2062 * (USART_SendData()) or by writing 1 to the TXFRQ in the register USART_RQR
mbed_official 157:90e3acc479a2 2063 * (USART_RequestCmd()).
mbed_official 157:90e3acc479a2 2064 * @retval None
mbed_official 157:90e3acc479a2 2065 */
mbed_official 157:90e3acc479a2 2066 void USART_ClearITPendingBit(USART_TypeDef* USARTx, uint32_t USART_IT)
mbed_official 157:90e3acc479a2 2067 {
mbed_official 157:90e3acc479a2 2068 uint32_t bitpos = 0, itmask = 0;
mbed_official 157:90e3acc479a2 2069 /* Check the parameters */
mbed_official 157:90e3acc479a2 2070 assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official 157:90e3acc479a2 2071 assert_param(IS_USART_CLEAR_IT(USART_IT));
mbed_official 157:90e3acc479a2 2072
mbed_official 157:90e3acc479a2 2073 bitpos = USART_IT >> 0x10;
mbed_official 157:90e3acc479a2 2074 itmask = ((uint32_t)0x01 << (uint32_t)bitpos);
mbed_official 157:90e3acc479a2 2075 USARTx->ICR = (uint32_t)itmask;
mbed_official 157:90e3acc479a2 2076 }
mbed_official 157:90e3acc479a2 2077
mbed_official 157:90e3acc479a2 2078 /**
mbed_official 157:90e3acc479a2 2079 * @}
mbed_official 157:90e3acc479a2 2080 */
mbed_official 157:90e3acc479a2 2081
mbed_official 157:90e3acc479a2 2082 /**
mbed_official 157:90e3acc479a2 2083 * @}
mbed_official 157:90e3acc479a2 2084 */
mbed_official 157:90e3acc479a2 2085
mbed_official 157:90e3acc479a2 2086 /**
mbed_official 157:90e3acc479a2 2087 * @}
mbed_official 157:90e3acc479a2 2088 */
mbed_official 157:90e3acc479a2 2089
mbed_official 157:90e3acc479a2 2090 /**
mbed_official 157:90e3acc479a2 2091 * @}
mbed_official 157:90e3acc479a2 2092 */
mbed_official 157:90e3acc479a2 2093
mbed_official 157:90e3acc479a2 2094 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/