| /** |
| ****************************************************************************** |
| * @file stm32l4xx_hal_uart_ex.c |
| * @author MCD Application Team |
| * @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 |
| ============================================================================== |
| ##### UART peripheral extended features ##### |
| ============================================================================== |
| |
| (#) Declare a UART_HandleTypeDef handle structure. |
| |
| (#) For the UART RS485 Driver Enable mode, initialize the UART registers |
| by calling the HAL_RS485Ex_Init() API. |
| |
| (#) FIFO mode enabling/disabling and RX/TX FIFO threshold programming. |
| |
| -@- When USART operates in FIFO mode, FIFO mode must be enabled prior |
| starting RX/TX transfers. Also RX/TX FIFO thresholds must be |
| configured prior starting RX/TX transfers. |
| |
| (#) Slave mode enabling/disabling and NSS pin configuration. |
| |
| -@- When USART operates in Slave mode, Slave mode must be enabled prior |
| starting RX/TX transfers. |
| |
| @endverbatim |
| ****************************************************************************** |
| * @attention |
| * |
| * <h2><center>© COPYRIGHT(c) 2017 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 "stm32l4xx_hal.h" |
| |
| /** @addtogroup STM32L4xx_HAL_Driver |
| * @{ |
| */ |
| |
| /** @defgroup UARTEx UARTEx |
| * @brief UART Extended HAL module driver |
| * @{ |
| */ |
| |
| #ifdef HAL_UART_MODULE_ENABLED |
| |
| /* Private typedef -----------------------------------------------------------*/ |
| /* Private define ------------------------------------------------------------*/ |
| /* Private macros ------------------------------------------------------------*/ |
| /* Private variables ---------------------------------------------------------*/ |
| /* Private function prototypes -----------------------------------------------*/ |
| /** @defgroup UARTEx_Private_Functions UARTEx Private Functions |
| * @{ |
| */ |
| static void UARTEx_Wakeup_AddressConfig(UART_HandleTypeDef *huart, UART_WakeUpTypeDef WakeUpSelection); |
| #if defined(USART_CR1_FIFOEN) |
| static void UARTEx_SetNbDataToProcess(UART_HandleTypeDef *huart); |
| #endif |
| /** |
| * @} |
| */ |
| |
| /* Exported functions --------------------------------------------------------*/ |
| |
| /** @defgroup UARTEx_Exported_Functions UARTEx Exported Functions |
| * @{ |
| */ |
| |
| /** @defgroup UARTEx_Exported_Functions_Group1 Initialization and 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 the parameters below 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. |
| (++) 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 the UART RS485 mode configuration |
| procedures (details for the procedures are available in reference manual). |
| |
| @endverbatim |
| |
| Depending on the frame length defined by the M1 and M0 bits (7-bit, |
| 8-bit or 9-bit), the possible UART formats are listed in the |
| following table. |
| |
| Table 1. UART frame format. |
| +-----------------------------------------------------------------------+ |
| | M1 bit | M0 bit | PCE bit | UART frame | |
| |---------|---------|-----------|---------------------------------------| |
| | 0 | 0 | 0 | | SB | 8 bit data | STB | | |
| |---------|---------|-----------|---------------------------------------| |
| | 0 | 0 | 1 | | SB | 7 bit data | PB | STB | | |
| |---------|---------|-----------|---------------------------------------| |
| | 0 | 1 | 0 | | SB | 9 bit data | STB | | |
| |---------|---------|-----------|---------------------------------------| |
| | 0 | 1 | 1 | | SB | 8 bit data | PB | STB | | |
| |---------|---------|-----------|---------------------------------------| |
| | 1 | 0 | 0 | | SB | 7 bit data | STB | | |
| |---------|---------|-----------|---------------------------------------| |
| | 1 | 0 | 1 | | SB | 6 bit data | PB | STB | | |
| +-----------------------------------------------------------------------+ |
| |
| * @{ |
| */ |
| |
| /** |
| * @brief Initialize the RS485 Driver enable feature according to the specified |
| * parameters in the UART_InitTypeDef and creates the associated handle. |
| * @param huart UART handle. |
| * @param Polarity Select the driver enable polarity. |
| * This parameter can be one of the following values: |
| * @arg @ref UART_DE_POLARITY_HIGH DE signal is active high |
| * @arg @ref UART_DE_POLARITY_LOW DE signal is active low |
| * @param AssertionTime 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 DeassertionTime 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 Polarity, uint32_t AssertionTime, uint32_t DeassertionTime) |
| { |
| 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(Polarity)); |
| |
| /* Check the Driver Enable assertion time */ |
| assert_param(IS_UART_ASSERTIONTIME(AssertionTime)); |
| |
| /* Check the Driver Enable deassertion time */ |
| assert_param(IS_UART_DEASSERTIONTIME(DeassertionTime)); |
| |
| if(huart->gState == HAL_UART_STATE_RESET) |
| { |
| /* Allocate lock resource and initialize it */ |
| huart->Lock = HAL_UNLOCKED; |
| |
| /* Init the low level hardware : GPIO, CLOCK, CORTEX */ |
| HAL_UART_MspInit(huart); |
| } |
| |
| huart->gState = 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 */ |
| SET_BIT(huart->Instance->CR3, USART_CR3_DEM); |
| |
| /* Set the Driver Enable polarity */ |
| MODIFY_REG(huart->Instance->CR3, USART_CR3_DEP, Polarity); |
| |
| /* Set the Driver Enable assertion and deassertion times */ |
| temp = (AssertionTime << UART_CR1_DEAT_ADDRESS_LSB_POS); |
| temp |= (DeassertionTime << 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->gState and huart->RxState to Ready */ |
| return (UART_CheckIdleState(huart)); |
| } |
| |
| |
| /** |
| * @} |
| */ |
| |
| /** @defgroup UARTEx_Exported_Functions_Group2 IO operation functions |
| * @brief Extended functions |
| * |
| @verbatim |
| =============================================================================== |
| ##### IO operation functions ##### |
| =============================================================================== |
| This subsection provides a set of Wakeup and FIFO mode related callback functions. |
| |
| (#) Wakeup from Stop mode Callback: |
| (+) HAL_UARTEx_WakeupCallback() |
| |
| (#) TX/RX Fifos Callbacks: |
| (+) HAL_UARTEx_RxFifoFullCallback() |
| (+) HAL_UARTEx_TxFifoEmptyCallback() |
| |
| @endverbatim |
| * @{ |
| */ |
| |
| /** |
| * @brief UART wakeup from Stop mode callback. |
| * @param huart UART handle. |
| * @retval None |
| */ |
| __weak void HAL_UARTEx_WakeupCallback(UART_HandleTypeDef *huart) |
| { |
| /* Prevent unused argument(s) compilation warning */ |
| UNUSED(huart); |
| |
| /* NOTE : This function should not be modified, when the callback is needed, |
| the HAL_UARTEx_WakeupCallback can be implemented in the user file. |
| */ |
| } |
| |
| #if defined(USART_CR1_FIFOEN) |
| /** |
| * @brief UART RX Fifo full callback. |
| * @param huart UART handle. |
| * @retval None |
| */ |
| __weak void HAL_UARTEx_RxFifoFullCallback (UART_HandleTypeDef *huart) |
| { |
| /* Prevent unused argument(s) compilation warning */ |
| UNUSED(huart); |
| |
| /* NOTE : This function should not be modified, when the callback is needed, |
| the HAL_UARTEx_RxFifoFullCallback can be implemented in the user file. |
| */ |
| } |
| |
| /** |
| * @brief UART TX Fifo empty callback. |
| * @param huart UART handle. |
| * @retval None |
| */ |
| __weak void HAL_UARTEx_TxFifoEmptyCallback (UART_HandleTypeDef *huart) |
| { |
| /* Prevent unused argument(s) compilation warning */ |
| UNUSED(huart); |
| |
| /* NOTE : This function should not be modified, when the callback is needed, |
| the HAL_UARTEx_TxFifoEmptyCallback can be implemented in the user file. |
| */ |
| } |
| #endif |
| |
| /** |
| * @} |
| */ |
| |
| /** @defgroup UARTEx_Exported_Functions_Group3 Peripheral Control functions |
| * @brief Extended Peripheral Control functions |
| * |
| @verbatim |
| =============================================================================== |
| ##### Peripheral Control functions ##### |
| =============================================================================== |
| [..] This section provides the following functions: |
| (+) HAL_UARTEx_EnableClockStopMode() API enables the UART clock (HSI or LSE only) during stop mode |
| (+) HAL_UARTEx_DisableClockStopMode() API disables the above functionality |
| (+) 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() API defines the wake-up from stop mode |
| trigger: address match, Start Bit detection or RXNE bit status. |
| (+) HAL_UARTEx_EnableStopMode() API enables the UART to wake up the MCU from stop mode |
| (+) HAL_UARTEx_DisableStopMode() API disables the above functionality |
| (+) HAL_UARTEx_WakeupCallback() called upon UART wakeup interrupt |
| (+) HAL_UARTEx_EnableSPISlaveMode() API enables the SPI slave mode |
| (+) HAL_UARTEx_DisableSPISlaveMode() API disables the SPI slave mode |
| (+) HAL_UARTEx_ConfigNSS API configures the Slave Select input pin (NSS) |
| (+) HAL_UARTEx_EnableFifoMode() API enables the FIFO mode |
| (+) HAL_UARTEx_DisableFifoMode() API disables the FIFO mode |
| (+) HAL_UARTEx_SetTxFifoThreshold() API sets the TX FIFO threshold |
| (+) HAL_UARTEx_SetRxFifoThreshold() API sets the RX FIFO threshold |
| |
| @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). |
| * @note Addresses detection lengths are: 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 @ref UART_ADDRESS_DETECT_4B 4-bit long address |
| * @arg @ref 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->gState = 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->gState to Ready */ |
| return (UART_CheckIdleState(huart)); |
| } |
| |
| |
| /** |
| * @brief Set Wakeup from Stop mode interrupt flag selection. |
| * @note It is the application responsibility to enable the interrupt used as |
| * usart_wkup interrupt source before entering low-power mode. |
| * @param huart UART handle. |
| * @param WakeUpSelection Address match, Start Bit detection or RXNE/RXFNE bit status. |
| * This parameter can be one of the following values: |
| * @arg @ref UART_WAKEUP_ON_ADDRESS |
| * @arg @ref UART_WAKEUP_ON_STARTBIT |
| * @arg @ref UART_WAKEUP_ON_READDATA_NONEMPTY |
| * @retval HAL status |
| */ |
| HAL_StatusTypeDef HAL_UARTEx_StopModeWakeUpSourceConfig(UART_HandleTypeDef *huart, UART_WakeUpTypeDef WakeUpSelection) |
| { |
| HAL_StatusTypeDef status = HAL_OK; |
| uint32_t tickstart = 0; |
| |
| /* 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->gState = 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) |
| { |
| UARTEx_Wakeup_AddressConfig(huart, WakeUpSelection); |
| } |
| |
| /* Enable the Peripheral */ |
| __HAL_UART_ENABLE(huart); |
| |
| /* Init tickstart for timeout managment*/ |
| tickstart = HAL_GetTick(); |
| |
| /* Wait until REACK flag is set */ |
| if(UART_WaitOnFlagUntilTimeout(huart, USART_ISR_REACK, RESET, tickstart, HAL_UART_TIMEOUT_VALUE) != HAL_OK) |
| { |
| status = HAL_TIMEOUT; |
| } |
| else |
| { |
| /* Initialize the UART State */ |
| huart->gState = HAL_UART_STATE_READY; |
| } |
| |
| /* Process Unlocked */ |
| __HAL_UNLOCK(huart); |
| |
| return status; |
| } |
| |
| |
| /** |
| * @brief Enable UART Stop Mode. |
| * @note The UART is able to wake up the MCU from Stop 1 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->gState = HAL_UART_STATE_BUSY; |
| |
| /* Set UESM bit */ |
| SET_BIT(huart->Instance->CR1, USART_CR1_UESM); |
| |
| huart->gState = 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->gState = HAL_UART_STATE_BUSY; |
| |
| /* Clear UESM bit */ |
| CLEAR_BIT(huart->Instance->CR1, USART_CR1_UESM); |
| |
| huart->gState = HAL_UART_STATE_READY; |
| |
| /* Process Unlocked */ |
| __HAL_UNLOCK(huart); |
| |
| return HAL_OK; |
| } |
| |
| #if defined(USART_CR2_SLVEN) |
| /** |
| * @brief Enable the SPI slave mode. |
| * @note When the UART operates in SPI slave mode, it handles data flow using |
| * the serial interface clock derived from the external SCLK signal |
| * provided by the external master SPI device. |
| * @note In SPI slave mode, the UART must be enabled before starting the master |
| * communications (or between frames while the clock is stable). Otherwise, |
| * if the UART slave is enabled while the master is in the middle of a |
| * frame, it will become desynchronized with the master. |
| * @note The data register of the slave needs to be ready before the first edge |
| * of the communication clock or before the end of the ongoing communication, |
| * otherwise the SPI slave will transmit zeros. |
| * @param huart UART handle. |
| * @retval HAL status |
| */ |
| HAL_StatusTypeDef HAL_UARTEx_EnableSlaveMode(UART_HandleTypeDef *huart) |
| { |
| uint32_t tmpcr1 = 0; |
| |
| /* Check parameters */ |
| assert_param(IS_UART_SPI_SLAVE_INSTANCE(huart->Instance)); |
| |
| /* Process Locked */ |
| __HAL_LOCK(huart); |
| |
| huart->gState = HAL_UART_STATE_BUSY; |
| |
| /* Save actual UART configuration */ |
| tmpcr1 = READ_REG(huart->Instance->CR1); |
| |
| /* Disable UART */ |
| __HAL_UART_DISABLE(huart); |
| |
| /* In SPI slave mode mode, the following bits must be kept cleared: |
| - LINEN and CLKEN bit in the USART_CR2 register |
| - HDSEL, SCEN and IREN bits in the USART_CR3 register.*/ |
| CLEAR_BIT(huart->Instance->CR2, (USART_CR2_LINEN | USART_CR2_CLKEN)); |
| CLEAR_BIT(huart->Instance->CR3, (USART_CR3_SCEN | USART_CR3_HDSEL | USART_CR3_IREN)); |
| |
| /* Enable SPI slave mode */ |
| SET_BIT(huart->Instance->CR2, USART_CR2_SLVEN); |
| |
| /* Restore UART configuration */ |
| WRITE_REG(huart->Instance->CR1, tmpcr1); |
| |
| huart->SlaveMode = UART_SLAVEMODE_ENABLE; |
| |
| huart->gState = HAL_UART_STATE_READY; |
| |
| /* Enable UART */ |
| __HAL_UART_ENABLE(huart); |
| |
| /* Process Unlocked */ |
| __HAL_UNLOCK(huart); |
| |
| return HAL_OK; |
| } |
| |
| /** |
| * @brief Disable the SPI slave mode. |
| * @param huart UART handle. |
| * @retval HAL status |
| */ |
| HAL_StatusTypeDef HAL_UARTEx_DisableSlaveMode(UART_HandleTypeDef *huart) |
| { |
| uint32_t tmpcr1 = 0; |
| |
| /* Check parameters */ |
| assert_param(IS_UART_SPI_SLAVE_INSTANCE(huart->Instance)); |
| |
| /* Process Locked */ |
| __HAL_LOCK(huart); |
| |
| huart->gState = HAL_UART_STATE_BUSY; |
| |
| /* Save actual UART configuration */ |
| tmpcr1 = READ_REG(huart->Instance->CR1); |
| |
| /* Disable UART */ |
| __HAL_UART_DISABLE(huart); |
| |
| /* Disable SPI slave mode */ |
| CLEAR_BIT(huart->Instance->CR2, USART_CR2_SLVEN); |
| |
| /* Restore UART configuration */ |
| WRITE_REG(huart->Instance->CR1, tmpcr1); |
| |
| huart->SlaveMode = UART_SLAVEMODE_ENABLE; |
| |
| huart->gState = HAL_UART_STATE_READY; |
| |
| /* Process Unlocked */ |
| __HAL_UNLOCK(huart); |
| |
| return HAL_OK; |
| } |
| |
| /** |
| * @brief Configure the Slave Select input pin (NSS). |
| * @note Software NSS management: SPI slave will always be selected and NSS |
| * input pin will be ignored. |
| * @note Hardware NSS management: the SPI slave selection depends on NSS |
| * input pin. The slave is selected when NSS is low and deselected when |
| * NSS is high. |
| * @param huart UART handle. |
| * @param NSSConfig NSS configuration. |
| * This parameter can be one of the following values: |
| * @arg @ref UART_NSS_HARD |
| * @arg @ref UART_NSS_SOFT |
| * @retval HAL status |
| */ |
| HAL_StatusTypeDef HAL_UARTEx_ConfigNSS(UART_HandleTypeDef *huart, uint32_t NSSConfig) |
| { |
| uint32_t tmpcr1 = 0; |
| |
| /* Check parameters */ |
| assert_param(IS_UART_SPI_SLAVE_INSTANCE(huart->Instance)); |
| assert_param(IS_UART_NSS(NSSConfig)); |
| |
| /* Process Locked */ |
| __HAL_LOCK(huart); |
| |
| huart->gState = HAL_UART_STATE_BUSY; |
| |
| /* Save actual UART configuration */ |
| tmpcr1 = READ_REG(huart->Instance->CR1); |
| |
| /* Disable UART */ |
| __HAL_UART_DISABLE(huart); |
| |
| /* Program DIS_NSS bit in the USART_CR2 register */ |
| MODIFY_REG(huart->Instance->CR2, USART_CR2_DIS_NSS, NSSConfig); |
| |
| /* Restore UART configuration */ |
| WRITE_REG(huart->Instance->CR1, tmpcr1); |
| |
| huart->gState = HAL_UART_STATE_READY; |
| |
| /* Process Unlocked */ |
| __HAL_UNLOCK(huart); |
| |
| return HAL_OK; |
| } |
| #endif |
| |
| #if defined(USART_CR1_FIFOEN) |
| /** |
| * @brief Enable the FIFO mode. |
| * @param huart UART handle. |
| * @retval HAL status |
| */ |
| HAL_StatusTypeDef HAL_UARTEx_EnableFifoMode(UART_HandleTypeDef *huart) |
| { |
| uint32_t tmpcr1 = 0; |
| |
| /* Check parameters */ |
| assert_param(IS_UART_FIFO_INSTANCE(huart->Instance)); |
| |
| /* Process Locked */ |
| __HAL_LOCK(huart); |
| |
| huart->gState = HAL_UART_STATE_BUSY; |
| |
| /* Save actual UART configuration */ |
| tmpcr1 = READ_REG(huart->Instance->CR1); |
| |
| /* Disable UART */ |
| __HAL_UART_DISABLE(huart); |
| |
| /* Enable FIFO mode */ |
| SET_BIT(tmpcr1, USART_CR1_FIFOEN); |
| huart->FifoMode = UART_FIFOMODE_ENABLE; |
| |
| /* Restore UART configuration */ |
| WRITE_REG(huart->Instance->CR1, tmpcr1); |
| |
| /* Determine the number of data to process during RX/TX ISR execution */ |
| UARTEx_SetNbDataToProcess(huart); |
| |
| huart->gState = HAL_UART_STATE_READY; |
| |
| /* Process Unlocked */ |
| __HAL_UNLOCK(huart); |
| |
| return HAL_OK; |
| } |
| |
| /** |
| * @brief Disable the FIFO mode. |
| * @param huart UART handle. |
| * @retval HAL status |
| */ |
| HAL_StatusTypeDef HAL_UARTEx_DisableFifoMode(UART_HandleTypeDef *huart) |
| { |
| uint32_t tmpcr1 = 0; |
| |
| /* Check parameters */ |
| assert_param(IS_UART_FIFO_INSTANCE(huart->Instance)); |
| |
| /* Process Locked */ |
| __HAL_LOCK(huart); |
| |
| huart->gState = HAL_UART_STATE_BUSY; |
| |
| /* Save actual UART configuration */ |
| tmpcr1 = READ_REG(huart->Instance->CR1); |
| |
| /* Disable UART */ |
| __HAL_UART_DISABLE(huart); |
| |
| /* Enable FIFO mode */ |
| CLEAR_BIT(tmpcr1, USART_CR1_FIFOEN); |
| huart->FifoMode = UART_FIFOMODE_DISABLE; |
| |
| /* Restore UART configuration */ |
| WRITE_REG(huart->Instance->CR1, tmpcr1); |
| |
| huart->gState = HAL_UART_STATE_READY; |
| |
| /* Process Unlocked */ |
| __HAL_UNLOCK(huart); |
| |
| return HAL_OK; |
| } |
| |
| /** |
| * @brief Set the TXFIFO threshold. |
| * @param huart UART handle. |
| * @param Threshold TX FIFO threshold value |
| * This parameter can be one of the following values: |
| * @arg @ref UART_TXFIFO_THRESHOLD_1_8 |
| * @arg @ref UART_TXFIFO_THRESHOLD_1_4 |
| * @arg @ref UART_TXFIFO_THRESHOLD_1_2 |
| * @arg @ref UART_TXFIFO_THRESHOLD_3_4 |
| * @arg @ref UART_TXFIFO_THRESHOLD_7_8 |
| * @arg @ref UART_TXFIFO_THRESHOLD_8_8 |
| * @retval HAL status |
| */ |
| HAL_StatusTypeDef HAL_UARTEx_SetTxFifoThreshold(UART_HandleTypeDef *huart, uint32_t Threshold) |
| { |
| uint32_t tmpcr1 = 0; |
| |
| /* Check parameters */ |
| assert_param(IS_UART_FIFO_INSTANCE(huart->Instance)); |
| assert_param(IS_UART_TXFIFO_THRESHOLD(Threshold)); |
| |
| /* Process Locked */ |
| __HAL_LOCK(huart); |
| |
| huart->gState = HAL_UART_STATE_BUSY; |
| |
| /* Save actual UART configuration */ |
| tmpcr1 = READ_REG(huart->Instance->CR1); |
| |
| /* Disable UART */ |
| __HAL_UART_DISABLE(huart); |
| |
| /* Update TX threshold configuration */ |
| MODIFY_REG(huart->Instance->CR3, USART_CR3_TXFTCFG, Threshold); |
| |
| /* Determine the number of data to process during RX/TX ISR execution */ |
| UARTEx_SetNbDataToProcess(huart); |
| |
| /* Restore UART configuration */ |
| WRITE_REG(huart->Instance->CR1, tmpcr1); |
| |
| huart->gState = HAL_UART_STATE_READY; |
| |
| /* Process Unlocked */ |
| __HAL_UNLOCK(huart); |
| |
| return HAL_OK; |
| } |
| |
| /** |
| * @brief Set the RXFIFO threshold. |
| * @param huart UART handle. |
| * @param Threshold RX FIFO threshold value |
| * This parameter can be one of the following values: |
| * @arg @ref UART_RXFIFO_THRESHOLD_1_8 |
| * @arg @ref UART_RXFIFO_THRESHOLD_1_4 |
| * @arg @ref UART_RXFIFO_THRESHOLD_1_2 |
| * @arg @ref UART_RXFIFO_THRESHOLD_3_4 |
| * @arg @ref UART_RXFIFO_THRESHOLD_7_8 |
| * @arg @ref UART_RXFIFO_THRESHOLD_8_8 |
| * @retval HAL status |
| */ |
| HAL_StatusTypeDef HAL_UARTEx_SetRxFifoThreshold(UART_HandleTypeDef *huart, uint32_t Threshold) |
| { |
| uint32_t tmpcr1 = 0; |
| |
| /* Check the parameters */ |
| assert_param(IS_UART_FIFO_INSTANCE(huart->Instance)); |
| assert_param(IS_UART_RXFIFO_THRESHOLD(Threshold)); |
| |
| /* Process Locked */ |
| __HAL_LOCK(huart); |
| |
| huart->gState = HAL_UART_STATE_BUSY; |
| |
| /* Save actual UART configuration */ |
| tmpcr1 = READ_REG(huart->Instance->CR1); |
| |
| /* Disable UART */ |
| __HAL_UART_DISABLE(huart); |
| |
| /* Update RX threshold configuration */ |
| MODIFY_REG(huart->Instance->CR3, USART_CR3_RXFTCFG, Threshold); |
| |
| /* Determine the number of data to process during RX/TX ISR execution */ |
| UARTEx_SetNbDataToProcess(huart); |
| |
| /* Restore UART configuration */ |
| WRITE_REG(huart->Instance->CR1, tmpcr1); |
| |
| huart->gState = HAL_UART_STATE_READY; |
| |
| /* Process Unlocked */ |
| __HAL_UNLOCK(huart); |
| |
| return HAL_OK; |
| } |
| #endif |
| |
| /** |
| * @} |
| */ |
| |
| /** |
| * @} |
| */ |
| |
| /** @addtogroup UARTEx_Private_Functions |
| * @{ |
| */ |
| |
| /** |
| * @brief Initialize the UART wake-up from stop mode parameters when triggered by address detection. |
| * @param huart UART handle. |
| * @param WakeUpSelection UART wake up from stop mode parameters. |
| * @retval None |
| */ |
| static void UARTEx_Wakeup_AddressConfig(UART_HandleTypeDef *huart, UART_WakeUpTypeDef WakeUpSelection) |
| { |
| assert_param(IS_UART_ADDRESSLENGTH_DETECT(WakeUpSelection.AddressLength)); |
| |
| /* Set the USART address length */ |
| MODIFY_REG(huart->Instance->CR2, USART_CR2_ADDM7, WakeUpSelection.AddressLength); |
| |
| /* Set the USART address node */ |
| MODIFY_REG(huart->Instance->CR2, USART_CR2_ADD, ((uint32_t)WakeUpSelection.Address << UART_CR2_ADDRESS_LSB_POS)); |
| } |
| |
| #if defined(USART_CR1_FIFOEN) |
| /** |
| * @brief Calculate the number of data to process in RX/TX ISR. |
| * @note The RX FIFO depth and the TX FIFO depth is extracted from |
| * the UART configuration registers. |
| * @param huart UART handle. |
| * @retval None |
| */ |
| void UARTEx_SetNbDataToProcess(UART_HandleTypeDef *huart) |
| { |
| uint8_t rx_fifo_depth; |
| uint8_t tx_fifo_depth; |
| uint8_t rx_fifo_threshold; |
| uint8_t tx_fifo_threshold; |
| uint8_t numerator[] = {1, 1, 1, 3, 7, 1}; |
| uint8_t denominator[] = {8, 4, 2, 4, 8, 1}; |
| |
| if (huart->FifoMode == UART_FIFOMODE_DISABLE) |
| { |
| huart->NbTxDataToProcess = 1; |
| huart->NbRxDataToProcess = 1; |
| } |
| else |
| { |
| rx_fifo_depth = 8; /* RX Fifo size */ |
| tx_fifo_depth = 8; /* TX Fifo size */ |
| rx_fifo_threshold = (uint8_t)(READ_BIT(huart->Instance->CR3, USART_CR3_RXFTCFG) >> USART_CR3_RXFTCFG_Pos); |
| tx_fifo_threshold = (uint8_t)(READ_BIT(huart->Instance->CR3, USART_CR3_TXFTCFG) >> USART_CR3_TXFTCFG_Pos); |
| huart->NbTxDataToProcess = (uint8_t)(tx_fifo_depth * numerator[tx_fifo_threshold])/denominator[tx_fifo_threshold]; |
| huart->NbRxDataToProcess = (uint8_t)(rx_fifo_depth * numerator[rx_fifo_threshold])/denominator[rx_fifo_threshold]; |
| } |
| } |
| #endif |
| |
| /** |
| * @} |
| */ |
| |
| #endif /* HAL_UART_MODULE_ENABLED */ |
| |
| /** |
| * @} |
| */ |
| |
| /** |
| * @} |
| */ |
| |
| /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |