/** ****************************************************************************** * @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 * *

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* * 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****/