mbed library sources
Fork of mbed-src by
Diff: targets/cmsis/TARGET_STM/TARGET_NUCLEO_F334R8/stm32f3xx_hal_uart_ex.c
- Revision:
- 237:f3da66175598
- Child:
- 375:3d36234a1087
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/cmsis/TARGET_STM/TARGET_NUCLEO_F334R8/stm32f3xx_hal_uart_ex.c Tue Jun 24 14:45:08 2014 +0100 @@ -0,0 +1,405 @@ +/** + ****************************************************************************** + * @file stm32f3xx_hal_uart_ex.c + * @author MCD Application Team + * @version V1.0.1 + * @date 18-June-2014 + * @brief Extended UART HAL module driver. + * + * This file provides firmware functions to manage the following extended + * functionalities of the Universal Asynchronous Receiver Transmitter Peripheral (UART). + * + Initialization and de-initialization functions + * + Peripheral Control functions + * + * + @verbatim + =============================================================================== + ##### How to use this driver ##### + =============================================================================== + [..] + The UART HAL driver can be used as follows: + + (#) Declare a UART_HandleTypeDef handle structure. + + (#) For the UART RS485 Driver Enabled mode, initialize the UART registers + by calling the HAL_RS485Ex_Init() API. + + + @endverbatim + ****************************************************************************** + * @attention + * + * <h2><center>© COPYRIGHT(c) 2014 STMicroelectronics</center></h2> + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. Neither the name of STMicroelectronics nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************** + */ + +/* Includes ------------------------------------------------------------------*/ +#include "stm32f3xx_hal.h" + +/** @addtogroup STM32F3xx_HAL_Driver + * @{ + */ + +/** @defgroup UARTEx + * @brief UART Extended HAL module driver + * @{ + */ +#ifdef HAL_UART_MODULE_ENABLED + +/* Private typedef -----------------------------------------------------------*/ +/* Private define ------------------------------------------------------------*/ +/* Private macro -------------------------------------------------------------*/ +/* Private variables ---------------------------------------------------------*/ +/* Private function prototypes -----------------------------------------------*/ +/* Private functions ---------------------------------------------------------*/ + +/** @defgroup UARTEx_Private_Functions + * @{ + */ + +/** @defgroup UARTEx_Group1 Extended Initialization/de-initialization functions + * @brief Extended Initialization and Configuration Functions + * +@verbatim +=============================================================================== + ##### Initialization and Configuration functions ##### + =============================================================================== + [..] + This subsection provides a set of functions allowing to initialize the USARTx or the UARTy + in asynchronous mode. + (+) For the asynchronous mode only these parameters can be configured: + (++) Baud Rate + (++) Word Length + (++) Stop Bit + (++) Parity: If the parity is enabled, then the MSB bit of the data written + in the data register is transmitted but is changed by the parity bit. + Depending on the frame length defined by the M bit (8-bits or 9-bits) + or by the M1 and M0 bits (7-bit, 8-bit or 9-bit), + the possible UART frame formats are as listed in the following table: + +---------------------------------------------------------------+ + | M bit | PCE bit | UART frame | + |-----------|-----------|---------------------------------------| + | 0 | 0 | | SB | 8-bit data | STB | | + |-----------|-----------|---------------------------------------| + | 0 | 1 | | SB | 7-bit data | PB | STB | | + |-----------|-----------|---------------------------------------| + | 1 | 0 | | SB | 9-bit data | STB | | + |-----------|-----------|---------------------------------------| + | 1 | 1 | | SB | 8-bit data | PB | STB | | + +---------------------------------------------------------------+ + | M1M0 bits | PCE bit | UART frame | + |-----------------------|---------------------------------------| + | 10 | 0 | | SB | 7-bit data | STB | | + |-----------|-----------|---------------------------------------| + | 10 | 1 | | SB | 6-bit data | PB | STB | | + +---------------------------------------------------------------+ + (++) Hardware flow control + (++) Receiver/transmitter modes + (++) Over Sampling Method + (++) One-Bit Sampling Method + (+) For the asynchronous mode, the following advanced features can be configured as well: + (++) TX and/or RX pin level inversion + (++) data logical level inversion + (++) RX and TX pins swap + (++) RX overrun detection disabling + (++) DMA disabling on RX error + (++) MSB first on communication line + (++) auto Baud rate detection + [..] + The HAL_RS485Ex_Init() API follows respectively the UART RS485 mode + configuration procedures (details for the procedures are available in reference manual). + +@endverbatim + * @{ + */ + + +/** + * @brief Initializes the RS485 Driver enable feature according to the specified + * parameters in the UART_InitTypeDef and creates the associated handle . + * @param huart: uart handle + * @param UART_DEPolarity: select the driver enable polarity + * This parameter can be one of the following values: + * @arg UART_DE_POLARITY_HIGH: DE signal is active high + * @arg UART_DE_POLARITY_LOW: DE signal is active low + * @param UART_DEAssertionTime: Driver Enable assertion time + * 5-bit value defining the time between the activation of the DE (Driver Enable) + * signal and the beginning of the start bit. It is expressed in sample time + * units (1/8 or 1/16 bit time, depending on the oversampling rate) + * @param UART_DEDeassertionTime: Driver Enable deassertion time + * 5-bit value defining the time between the end of the last stop bit, in a + * transmitted message, and the de-activation of the DE (Driver Enable) signal. + * It is expressed in sample time units (1/8 or 1/16 bit time, depending on the + * oversampling rate). + * @retval HAL status + */ +HAL_StatusTypeDef HAL_RS485Ex_Init(UART_HandleTypeDef *huart, uint32_t UART_DEPolarity, uint32_t UART_DEAssertionTime, uint32_t UART_DEDeassertionTime) +{ + uint32_t temp = 0x0; + + /* Check the UART handle allocation */ + if(huart == NULL) + { + return HAL_ERROR; + } + /* Check the Driver Enable UART instance */ + assert_param(IS_UART_DRIVER_ENABLE_INSTANCE(huart->Instance)); + + /* Check the Driver Enable polarity */ + assert_param(IS_UART_DE_POLARITY(UART_DEPolarity)); + + /* Check the Driver Enable assertion time */ + assert_param(IS_UART_ASSERTIONTIME(UART_DEAssertionTime)); + + /* Check the Driver Enable deassertion time */ + assert_param(IS_UART_DEASSERTIONTIME(UART_DEDeassertionTime)); + + if(huart->State == HAL_UART_STATE_RESET) + { + /* Init the low level hardware : GPIO, CLOCK */ + HAL_UART_MspInit(huart); + } + + huart->State = HAL_UART_STATE_BUSY; + + /* Disable the Peripheral */ + __HAL_UART_DISABLE(huart); + + /* Set the UART Communication parameters */ + if (UART_SetConfig(huart) == HAL_ERROR) + { + return HAL_ERROR; + } + + if (huart->AdvancedInit.AdvFeatureInit != UART_ADVFEATURE_NO_INIT) + { + UART_AdvFeatureConfig(huart); + } + + /* Enable the Driver Enable mode by setting the DEM bit in the CR3 register */ + huart->Instance->CR3 |= USART_CR3_DEM; + + /* Set the Driver Enable polarity */ + MODIFY_REG(huart->Instance->CR3, USART_CR3_DEP, UART_DEPolarity); + + /* Set the Driver Enable assertion and deassertion times */ + temp = (UART_DEAssertionTime << UART_CR1_DEAT_ADDRESS_LSB_POS); + temp |= (UART_DEDeassertionTime << UART_CR1_DEDT_ADDRESS_LSB_POS); + MODIFY_REG(huart->Instance->CR1, (USART_CR1_DEDT|USART_CR1_DEAT), temp); + + /* Enable the Peripheral */ + __HAL_UART_ENABLE(huart); + + /* TEACK and/or REACK to check before moving huart->State to Ready */ + return (UART_CheckIdleState(huart)); +} + + +/** + * @} + */ + +/** @defgroup UARTEx_Group2 Extended Peripheral Control functions + * @brief Extended Peripheral Control functions + * +@verbatim + =============================================================================== + ##### Peripheral Control functions ##### + =============================================================================== + [..] + This subsection provides an extended function allowing to control the UART. + (+) HAL_MultiProcessorEx_AddressLength_Set() API optionally sets the UART node address + detection length to more than 4 bits for multiprocessor address mark wake up. + (+) HAL_UARTEx_StopModeWakeUpSourceConfig() configures the address for wake-up from + Stop mode based on address match + (+) HAL_UARTEx_EnableStopMode() API enables the UART to wake up the MCU from stop mode + (+) HAL_UARTEx_DisableStopMode() API disables the above functionality +@endverbatim + * @{ + */ + + + +/** + * @brief By default in multiprocessor mode, when the wake up method is set + * to address mark, the UART handles only 4-bit long addresses detection. + * This API allows to enable longer addresses detection (6-, 7- or 8-bit + * long): + * - 6-bit address detection in 7-bit data mode + * - 7-bit address detection in 8-bit data mode + * - 8-bit address detection in 9-bit data mode + * @param huart: UART handle + * @param AddressLength: this parameter can be one of the following values: + * @arg UART_ADDRESS_DETECT_4B: 4-bit long address + * @arg UART_ADDRESS_DETECT_7B: 6-, 7- or 8-bit long address + * @retval HAL status + */ +HAL_StatusTypeDef HAL_MultiProcessorEx_AddressLength_Set(UART_HandleTypeDef *huart, uint32_t AddressLength) +{ + /* Check the UART handle allocation */ + if(huart == NULL) + { + return HAL_ERROR; + } + + /* Check the address length parameter */ + assert_param(IS_UART_ADDRESSLENGTH_DETECT(AddressLength)); + + huart->State = HAL_UART_STATE_BUSY; + + /* Disable the Peripheral */ + __HAL_UART_DISABLE(huart); + + /* Set the address length */ + MODIFY_REG(huart->Instance->CR2, USART_CR2_ADDM7, AddressLength); + + /* Enable the Peripheral */ + __HAL_UART_ENABLE(huart); + + /* TEACK and/or REACK to check before moving huart->State to Ready */ + return (UART_CheckIdleState(huart)); +} + + +/** + * @brief Set Wakeup from Stop mode interrupt flag selection + * @param huart: uart handle, + * @param WakeUpSelection: address match, Start Bit detection or RXNE bit status. + * This parameter can be one of the following values: + * @arg UART_WAKEUP_ON_ADDRESS + * @arg UART_WAKEUP_ON_STARTBIT + * @arg UART_WAKEUP_ON_READDATA_NONEMPTY + * @retval HAL status + */ +HAL_StatusTypeDef HAL_UARTEx_StopModeWakeUpSourceConfig(UART_HandleTypeDef *huart, UART_WakeUpTypeDef WakeUpSelection) +{ + + /* check the wake-up from stop mode UART instance */ + assert_param(IS_UART_WAKEUP_FROMSTOP_INSTANCE(huart->Instance)); + /* check the wake-up selection parameter */ + assert_param(IS_UART_WAKEUP_SELECTION(WakeUpSelection.WakeUpEvent)); + + /* Process Locked */ + __HAL_LOCK(huart); + + huart->State = HAL_UART_STATE_BUSY; + + /* Disable the Peripheral */ + __HAL_UART_DISABLE(huart); + + /* Set the wake-up selection scheme */ + MODIFY_REG(huart->Instance->CR3, USART_CR3_WUS, WakeUpSelection.WakeUpEvent); + + if (WakeUpSelection.WakeUpEvent == UART_WAKEUP_ON_ADDRESS) + { + UART_Wakeup_AddressConfig(huart, WakeUpSelection); + } + + /* Enable the Peripheral */ + __HAL_UART_ENABLE(huart); + + /* Wait until REACK flag is set */ + if(UART_WaitOnFlagUntilTimeout(huart, USART_ISR_REACK, RESET, HAL_UART_TIMEOUT_VALUE) != HAL_OK) + { + return HAL_TIMEOUT; + } + else + { + /* Initialize the UART State */ + huart->State= HAL_UART_STATE_READY; + /* Process Unlocked */ + __HAL_UNLOCK(huart); + return HAL_OK; + } +} + + +/** + * @brief Enable UART Stop Mode + * The UART is able to wake up the MCU from Stop mode as long as UART clock is HSI or LSE + * @param huart: uart handle + * @retval HAL status + */ +HAL_StatusTypeDef HAL_UARTEx_EnableStopMode(UART_HandleTypeDef *huart) +{ + /* Process Locked */ + __HAL_LOCK(huart); + + huart->State = HAL_UART_STATE_BUSY; + + /* Set the USART UESM bit */ + huart->Instance->CR1 |= USART_CR1_UESM; + + huart->State = HAL_UART_STATE_READY; + + /* Process Unlocked */ + __HAL_UNLOCK(huart); + + return HAL_OK; +} + +/** + * @brief Disable UART Stop Mode + * @param huart: uart handle + * @retval HAL status + */ +HAL_StatusTypeDef HAL_UARTEx_DisableStopMode(UART_HandleTypeDef *huart) +{ + /* Process Locked */ + __HAL_LOCK(huart); + + huart->State = HAL_UART_STATE_BUSY; + + /* Clear USART UESM bit */ + huart->Instance->CR1 &= ~(USART_CR1_UESM); + + huart->State = HAL_UART_STATE_READY; + + /* Process Unlocked */ + __HAL_UNLOCK(huart); + + return HAL_OK; +} + + +/** + * @} + */ + +/** + * @} + */ + +#endif /* HAL_UART_MODULE_ENABLED */ +/** + * @} + */ + +/** + * @} + */ + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/