diff options
Diffstat (limited to 'Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_ll_usart.c')
| -rw-r--r-- | Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_ll_usart.c | 495 |
1 files changed, 495 insertions, 0 deletions
diff --git a/Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_ll_usart.c b/Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_ll_usart.c new file mode 100644 index 0000000..052a0b2 --- /dev/null +++ b/Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_ll_usart.c @@ -0,0 +1,495 @@ +/**
+ ******************************************************************************
+ * @file stm32h7xx_ll_usart.c
+ * @author MCD Application Team
+ * @brief USART LL module driver.
+ ******************************************************************************
+ * @attention
+ *
+ * Copyright (c) 2017 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software is licensed under terms that can be found in the LICENSE file
+ * in the root directory of this software component.
+ * If no LICENSE file comes with this software, it is provided AS-IS.
+ *
+ ******************************************************************************
+ */
+#if defined(USE_FULL_LL_DRIVER)
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32h7xx_ll_usart.h"
+#include "stm32h7xx_ll_rcc.h"
+#include "stm32h7xx_ll_bus.h"
+#ifdef USE_FULL_ASSERT
+#include "stm32_assert.h"
+#else
+#define assert_param(expr) ((void)0U)
+#endif /* USE_FULL_ASSERT */
+
+/** @addtogroup STM32H7xx_LL_Driver
+ * @{
+ */
+
+#if defined(USART1) || defined(USART2) || defined(USART3) || defined(USART6) \
+ || defined(UART4) || defined(UART5) || defined(UART7) || defined(UART8) || defined(UART9) || defined(USART10)
+
+/** @addtogroup USART_LL
+ * @{
+ */
+
+/* Private types -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private constants ---------------------------------------------------------*/
+/** @addtogroup USART_LL_Private_Constants
+ * @{
+ */
+
+/* Definition of default baudrate value used for USART initialisation */
+#define USART_DEFAULT_BAUDRATE (9600U)
+
+/**
+ * @}
+ */
+
+/* Private macros ------------------------------------------------------------*/
+/** @addtogroup USART_LL_Private_Macros
+ * @{
+ */
+
+#define IS_LL_USART_PRESCALER(__VALUE__) (((__VALUE__) == LL_USART_PRESCALER_DIV1) \
+ || ((__VALUE__) == LL_USART_PRESCALER_DIV2) \
+ || ((__VALUE__) == LL_USART_PRESCALER_DIV4) \
+ || ((__VALUE__) == LL_USART_PRESCALER_DIV6) \
+ || ((__VALUE__) == LL_USART_PRESCALER_DIV8) \
+ || ((__VALUE__) == LL_USART_PRESCALER_DIV10) \
+ || ((__VALUE__) == LL_USART_PRESCALER_DIV12) \
+ || ((__VALUE__) == LL_USART_PRESCALER_DIV16) \
+ || ((__VALUE__) == LL_USART_PRESCALER_DIV32) \
+ || ((__VALUE__) == LL_USART_PRESCALER_DIV64) \
+ || ((__VALUE__) == LL_USART_PRESCALER_DIV128) \
+ || ((__VALUE__) == LL_USART_PRESCALER_DIV256))
+
+/* __BAUDRATE__ The maximum Baud Rate is derived from the maximum clock available
+ * divided by the smallest oversampling used on the USART (i.e. 8) */
+#define IS_LL_USART_BAUDRATE(__BAUDRATE__) ((__BAUDRATE__) <= 12500000U)
+
+/* __VALUE__ In case of oversampling by 16 and 8, BRR content must be greater than or equal to 16d. */
+#define IS_LL_USART_BRR_MIN(__VALUE__) ((__VALUE__) >= 16U)
+
+#define IS_LL_USART_DIRECTION(__VALUE__) (((__VALUE__) == LL_USART_DIRECTION_NONE) \
+ || ((__VALUE__) == LL_USART_DIRECTION_RX) \
+ || ((__VALUE__) == LL_USART_DIRECTION_TX) \
+ || ((__VALUE__) == LL_USART_DIRECTION_TX_RX))
+
+#define IS_LL_USART_PARITY(__VALUE__) (((__VALUE__) == LL_USART_PARITY_NONE) \
+ || ((__VALUE__) == LL_USART_PARITY_EVEN) \
+ || ((__VALUE__) == LL_USART_PARITY_ODD))
+
+#define IS_LL_USART_DATAWIDTH(__VALUE__) (((__VALUE__) == LL_USART_DATAWIDTH_7B) \
+ || ((__VALUE__) == LL_USART_DATAWIDTH_8B) \
+ || ((__VALUE__) == LL_USART_DATAWIDTH_9B))
+
+#define IS_LL_USART_OVERSAMPLING(__VALUE__) (((__VALUE__) == LL_USART_OVERSAMPLING_16) \
+ || ((__VALUE__) == LL_USART_OVERSAMPLING_8))
+
+#define IS_LL_USART_LASTBITCLKOUTPUT(__VALUE__) (((__VALUE__) == LL_USART_LASTCLKPULSE_NO_OUTPUT) \
+ || ((__VALUE__) == LL_USART_LASTCLKPULSE_OUTPUT))
+
+#define IS_LL_USART_CLOCKPHASE(__VALUE__) (((__VALUE__) == LL_USART_PHASE_1EDGE) \
+ || ((__VALUE__) == LL_USART_PHASE_2EDGE))
+
+#define IS_LL_USART_CLOCKPOLARITY(__VALUE__) (((__VALUE__) == LL_USART_POLARITY_LOW) \
+ || ((__VALUE__) == LL_USART_POLARITY_HIGH))
+
+#define IS_LL_USART_CLOCKOUTPUT(__VALUE__) (((__VALUE__) == LL_USART_CLOCK_DISABLE) \
+ || ((__VALUE__) == LL_USART_CLOCK_ENABLE))
+
+#define IS_LL_USART_STOPBITS(__VALUE__) (((__VALUE__) == LL_USART_STOPBITS_0_5) \
+ || ((__VALUE__) == LL_USART_STOPBITS_1) \
+ || ((__VALUE__) == LL_USART_STOPBITS_1_5) \
+ || ((__VALUE__) == LL_USART_STOPBITS_2))
+
+#define IS_LL_USART_HWCONTROL(__VALUE__) (((__VALUE__) == LL_USART_HWCONTROL_NONE) \
+ || ((__VALUE__) == LL_USART_HWCONTROL_RTS) \
+ || ((__VALUE__) == LL_USART_HWCONTROL_CTS) \
+ || ((__VALUE__) == LL_USART_HWCONTROL_RTS_CTS))
+
+/**
+ * @}
+ */
+
+/* Private function prototypes -----------------------------------------------*/
+
+/* Exported functions --------------------------------------------------------*/
+/** @addtogroup USART_LL_Exported_Functions
+ * @{
+ */
+
+/** @addtogroup USART_LL_EF_Init
+ * @{
+ */
+
+/**
+ * @brief De-initialize USART registers (Registers restored to their default values).
+ * @param USARTx USART Instance
+ * @retval An ErrorStatus enumeration value:
+ * - SUCCESS: USART registers are de-initialized
+ * - ERROR: USART registers are not de-initialized
+ */
+ErrorStatus LL_USART_DeInit(const USART_TypeDef *USARTx)
+{
+ ErrorStatus status = SUCCESS;
+
+ /* Check the parameters */
+ assert_param(IS_UART_INSTANCE(USARTx));
+
+ if (USARTx == USART1)
+ {
+ /* Force reset of USART clock */
+ LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_USART1);
+
+ /* Release reset of USART clock */
+ LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_USART1);
+ }
+ else if (USARTx == USART2)
+ {
+ /* Force reset of USART clock */
+ LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_USART2);
+
+ /* Release reset of USART clock */
+ LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_USART2);
+ }
+ else if (USARTx == USART3)
+ {
+ /* Force reset of USART clock */
+ LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_USART3);
+
+ /* Release reset of USART clock */
+ LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_USART3);
+ }
+ else if (USARTx == UART4)
+ {
+ /* Force reset of UART clock */
+ LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_UART4);
+
+ /* Release reset of UART clock */
+ LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_UART4);
+ }
+ else if (USARTx == UART5)
+ {
+ /* Force reset of UART clock */
+ LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_UART5);
+
+ /* Release reset of UART clock */
+ LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_UART5);
+ }
+ else if (USARTx == USART6)
+ {
+ /* Force reset of USART clock */
+ LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_USART6);
+
+ /* Release reset of USART clock */
+ LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_USART6);
+ }
+ else if (USARTx == UART7)
+ {
+ /* Force reset of UART clock */
+ LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_UART7);
+
+ /* Release reset of UART clock */
+ LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_UART7);
+ }
+ else if (USARTx == UART8)
+ {
+ /* Force reset of UART clock */
+ LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_UART8);
+
+ /* Release reset of UART clock */
+ LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_UART8);
+ }
+#if defined(UART9)
+ else if (USARTx == UART9)
+ {
+ /* Force reset of UART clock */
+ LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_UART9);
+
+ /* Release reset of UART clock */
+ LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_UART9);
+ }
+#endif /* UART9 */
+#if defined(USART10)
+ else if (USARTx == USART10)
+ {
+ /* Force reset of USART clock */
+ LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_USART10);
+
+ /* Release reset of USART clock */
+ LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_USART10);
+ }
+#endif /* USART10 */
+ else
+ {
+ status = ERROR;
+ }
+
+ return (status);
+}
+
+/**
+ * @brief Initialize USART registers according to the specified
+ * parameters in USART_InitStruct.
+ * @note As some bits in USART configuration registers can only be written when
+ * the USART is disabled (USART_CR1_UE bit =0), USART Peripheral should be in disabled state prior calling
+ * this function. Otherwise, ERROR result will be returned.
+ * @note Baud rate value stored in USART_InitStruct BaudRate field, should be valid (different from 0).
+ * @param USARTx USART Instance
+ * @param USART_InitStruct pointer to a LL_USART_InitTypeDef structure
+ * that contains the configuration information for the specified USART peripheral.
+ * @retval An ErrorStatus enumeration value:
+ * - SUCCESS: USART registers are initialized according to USART_InitStruct content
+ * - ERROR: Problem occurred during USART Registers initialization
+ */
+ErrorStatus LL_USART_Init(USART_TypeDef *USARTx, const LL_USART_InitTypeDef *USART_InitStruct)
+{
+ ErrorStatus status = ERROR;
+ uint32_t periphclk = LL_RCC_PERIPH_FREQUENCY_NO;
+
+ /* Check the parameters */
+ assert_param(IS_UART_INSTANCE(USARTx));
+ assert_param(IS_LL_USART_PRESCALER(USART_InitStruct->PrescalerValue));
+ assert_param(IS_LL_USART_BAUDRATE(USART_InitStruct->BaudRate));
+ assert_param(IS_LL_USART_DATAWIDTH(USART_InitStruct->DataWidth));
+ assert_param(IS_LL_USART_STOPBITS(USART_InitStruct->StopBits));
+ assert_param(IS_LL_USART_PARITY(USART_InitStruct->Parity));
+ assert_param(IS_LL_USART_DIRECTION(USART_InitStruct->TransferDirection));
+ assert_param(IS_LL_USART_HWCONTROL(USART_InitStruct->HardwareFlowControl));
+ assert_param(IS_LL_USART_OVERSAMPLING(USART_InitStruct->OverSampling));
+
+ /* USART needs to be in disabled state, in order to be able to configure some bits in
+ CRx registers */
+ if (LL_USART_IsEnabled(USARTx) == 0U)
+ {
+ /*---------------------------- USART CR1 Configuration ---------------------
+ * Configure USARTx CR1 (USART Word Length, Parity, Mode and Oversampling bits) with parameters:
+ * - DataWidth: USART_CR1_M bits according to USART_InitStruct->DataWidth value
+ * - Parity: USART_CR1_PCE, USART_CR1_PS bits according to USART_InitStruct->Parity value
+ * - TransferDirection: USART_CR1_TE, USART_CR1_RE bits according to USART_InitStruct->TransferDirection value
+ * - Oversampling: USART_CR1_OVER8 bit according to USART_InitStruct->OverSampling value.
+ */
+ MODIFY_REG(USARTx->CR1,
+ (USART_CR1_M | USART_CR1_PCE | USART_CR1_PS |
+ USART_CR1_TE | USART_CR1_RE | USART_CR1_OVER8),
+ (USART_InitStruct->DataWidth | USART_InitStruct->Parity |
+ USART_InitStruct->TransferDirection | USART_InitStruct->OverSampling));
+
+ /*---------------------------- USART CR2 Configuration ---------------------
+ * Configure USARTx CR2 (Stop bits) with parameters:
+ * - Stop Bits: USART_CR2_STOP bits according to USART_InitStruct->StopBits value.
+ * - CLKEN, CPOL, CPHA and LBCL bits are to be configured using LL_USART_ClockInit().
+ */
+ LL_USART_SetStopBitsLength(USARTx, USART_InitStruct->StopBits);
+
+ /*---------------------------- USART CR3 Configuration ---------------------
+ * Configure USARTx CR3 (Hardware Flow Control) with parameters:
+ * - HardwareFlowControl: USART_CR3_RTSE, USART_CR3_CTSE bits according to
+ * USART_InitStruct->HardwareFlowControl value.
+ */
+ LL_USART_SetHWFlowCtrl(USARTx, USART_InitStruct->HardwareFlowControl);
+
+ /*---------------------------- USART BRR Configuration ---------------------
+ * Retrieve Clock frequency used for USART Peripheral
+ */
+ if (USARTx == USART1)
+ {
+ periphclk = LL_RCC_GetUSARTClockFreq(LL_RCC_USART16_CLKSOURCE);
+ }
+ else if (USARTx == USART2)
+ {
+ periphclk = LL_RCC_GetUSARTClockFreq(LL_RCC_USART234578_CLKSOURCE);
+ }
+ else if (USARTx == USART3)
+ {
+ periphclk = LL_RCC_GetUSARTClockFreq(LL_RCC_USART234578_CLKSOURCE);
+ }
+ else if (USARTx == UART4)
+ {
+ periphclk = LL_RCC_GetUSARTClockFreq(LL_RCC_USART234578_CLKSOURCE);
+ }
+ else if (USARTx == UART5)
+ {
+ periphclk = LL_RCC_GetUSARTClockFreq(LL_RCC_USART234578_CLKSOURCE);
+ }
+ else if (USARTx == USART6)
+ {
+ periphclk = LL_RCC_GetUSARTClockFreq(LL_RCC_USART16_CLKSOURCE);
+ }
+ else if (USARTx == UART7)
+ {
+ periphclk = LL_RCC_GetUSARTClockFreq(LL_RCC_USART234578_CLKSOURCE);
+ }
+ else if (USARTx == UART8)
+ {
+ periphclk = LL_RCC_GetUSARTClockFreq(LL_RCC_USART234578_CLKSOURCE);
+ }
+#if defined(UART9)
+ else if (USARTx == UART9)
+ {
+ periphclk = LL_RCC_GetUSARTClockFreq(LL_RCC_USART16_CLKSOURCE);
+ }
+#endif /* UART9 */
+#if defined(USART10)
+ else if (USARTx == USART10)
+ {
+ periphclk = LL_RCC_GetUSARTClockFreq(LL_RCC_USART16_CLKSOURCE);
+ }
+#endif /* USART10 */
+ else
+ {
+ /* Nothing to do, as error code is already assigned to ERROR value */
+ }
+
+ /* Configure the USART Baud Rate :
+ - prescaler value is required
+ - valid baud rate value (different from 0) is required
+ - Peripheral clock as returned by RCC service, should be valid (different from 0).
+ */
+ if ((periphclk != LL_RCC_PERIPH_FREQUENCY_NO)
+ && (USART_InitStruct->BaudRate != 0U))
+ {
+ status = SUCCESS;
+ LL_USART_SetBaudRate(USARTx,
+ periphclk,
+ USART_InitStruct->PrescalerValue,
+ USART_InitStruct->OverSampling,
+ USART_InitStruct->BaudRate);
+
+ /* Check BRR is greater than or equal to 16d */
+ assert_param(IS_LL_USART_BRR_MIN(USARTx->BRR));
+ }
+
+ /*---------------------------- USART PRESC Configuration -----------------------
+ * Configure USARTx PRESC (Prescaler) with parameters:
+ * - PrescalerValue: USART_PRESC_PRESCALER bits according to USART_InitStruct->PrescalerValue value.
+ */
+ LL_USART_SetPrescaler(USARTx, USART_InitStruct->PrescalerValue);
+ }
+ /* Endif (=> USART not in Disabled state => return ERROR) */
+
+ return (status);
+}
+
+/**
+ * @brief Set each @ref LL_USART_InitTypeDef field to default value.
+ * @param USART_InitStruct pointer to a @ref LL_USART_InitTypeDef structure
+ * whose fields will be set to default values.
+ * @retval None
+ */
+
+void LL_USART_StructInit(LL_USART_InitTypeDef *USART_InitStruct)
+{
+ /* Set USART_InitStruct fields to default values */
+ USART_InitStruct->PrescalerValue = LL_USART_PRESCALER_DIV1;
+ USART_InitStruct->BaudRate = USART_DEFAULT_BAUDRATE;
+ USART_InitStruct->DataWidth = LL_USART_DATAWIDTH_8B;
+ USART_InitStruct->StopBits = LL_USART_STOPBITS_1;
+ USART_InitStruct->Parity = LL_USART_PARITY_NONE ;
+ USART_InitStruct->TransferDirection = LL_USART_DIRECTION_TX_RX;
+ USART_InitStruct->HardwareFlowControl = LL_USART_HWCONTROL_NONE;
+ USART_InitStruct->OverSampling = LL_USART_OVERSAMPLING_16;
+}
+
+/**
+ * @brief Initialize USART Clock related settings according to the
+ * specified parameters in the USART_ClockInitStruct.
+ * @note As some bits in USART configuration registers can only be written when
+ * the USART is disabled (USART_CR1_UE bit =0), USART Peripheral should be in disabled state prior calling
+ * this function. Otherwise, ERROR result will be returned.
+ * @param USARTx USART Instance
+ * @param USART_ClockInitStruct pointer to a @ref LL_USART_ClockInitTypeDef structure
+ * that contains the Clock configuration information for the specified USART peripheral.
+ * @retval An ErrorStatus enumeration value:
+ * - SUCCESS: USART registers related to Clock settings are initialized according
+ * to USART_ClockInitStruct content
+ * - ERROR: Problem occurred during USART Registers initialization
+ */
+ErrorStatus LL_USART_ClockInit(USART_TypeDef *USARTx, const LL_USART_ClockInitTypeDef *USART_ClockInitStruct)
+{
+ ErrorStatus status = SUCCESS;
+
+ /* Check USART Instance and Clock signal output parameters */
+ assert_param(IS_UART_INSTANCE(USARTx));
+ assert_param(IS_LL_USART_CLOCKOUTPUT(USART_ClockInitStruct->ClockOutput));
+
+ /* USART needs to be in disabled state, in order to be able to configure some bits in
+ CRx registers */
+ if (LL_USART_IsEnabled(USARTx) == 0U)
+ {
+ /* Ensure USART instance is USART capable */
+ assert_param(IS_USART_INSTANCE(USARTx));
+
+ /* Check clock related parameters */
+ assert_param(IS_LL_USART_CLOCKPOLARITY(USART_ClockInitStruct->ClockPolarity));
+ assert_param(IS_LL_USART_CLOCKPHASE(USART_ClockInitStruct->ClockPhase));
+ assert_param(IS_LL_USART_LASTBITCLKOUTPUT(USART_ClockInitStruct->LastBitClockPulse));
+
+ /*---------------------------- USART CR2 Configuration -----------------------
+ * Configure USARTx CR2 (Clock signal related bits) with parameters:
+ * - Clock Output: USART_CR2_CLKEN bit according to USART_ClockInitStruct->ClockOutput value
+ * - Clock Polarity: USART_CR2_CPOL bit according to USART_ClockInitStruct->ClockPolarity value
+ * - Clock Phase: USART_CR2_CPHA bit according to USART_ClockInitStruct->ClockPhase value
+ * - Last Bit Clock Pulse Output: USART_CR2_LBCL bit according to USART_ClockInitStruct->LastBitClockPulse value.
+ */
+ MODIFY_REG(USARTx->CR2,
+ USART_CR2_CLKEN | USART_CR2_CPHA | USART_CR2_CPOL | USART_CR2_LBCL,
+ USART_ClockInitStruct->ClockOutput | USART_ClockInitStruct->ClockPolarity |
+ USART_ClockInitStruct->ClockPhase | USART_ClockInitStruct->LastBitClockPulse);
+ }
+ /* Else (USART not in Disabled state => return ERROR */
+ else
+ {
+ status = ERROR;
+ }
+
+ return (status);
+}
+
+/**
+ * @brief Set each field of a @ref LL_USART_ClockInitTypeDef type structure to default value.
+ * @param USART_ClockInitStruct pointer to a @ref LL_USART_ClockInitTypeDef structure
+ * whose fields will be set to default values.
+ * @retval None
+ */
+void LL_USART_ClockStructInit(LL_USART_ClockInitTypeDef *USART_ClockInitStruct)
+{
+ /* Set LL_USART_ClockInitStruct fields with default values */
+ USART_ClockInitStruct->ClockOutput = LL_USART_CLOCK_DISABLE;
+ USART_ClockInitStruct->ClockPolarity = LL_USART_POLARITY_LOW; /* Not relevant when ClockOutput =
+ LL_USART_CLOCK_DISABLE */
+ USART_ClockInitStruct->ClockPhase = LL_USART_PHASE_1EDGE; /* Not relevant when ClockOutput =
+ LL_USART_CLOCK_DISABLE */
+ USART_ClockInitStruct->LastBitClockPulse = LL_USART_LASTCLKPULSE_NO_OUTPUT; /* Not relevant when ClockOutput =
+ LL_USART_CLOCK_DISABLE */
+}
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+#endif /* USART1 || USART2 || USART3 || USART6 || UART4 || UART5 || UART7 || UART8 || UART9 || USART10 */
+
+/**
+ * @}
+ */
+
+#endif /* USE_FULL_LL_DRIVER */
+
+
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