diff options
Diffstat (limited to 'bsps/arm/stm32h7/hal/stm32h7xx_ll_usart.c')
-rw-r--r-- | bsps/arm/stm32h7/hal/stm32h7xx_ll_usart.c | 991 |
1 files changed, 495 insertions, 496 deletions
diff --git a/bsps/arm/stm32h7/hal/stm32h7xx_ll_usart.c b/bsps/arm/stm32h7/hal/stm32h7xx_ll_usart.c index d3809c7eab..a38b4d59ab 100644 --- a/bsps/arm/stm32h7/hal/stm32h7xx_ll_usart.c +++ b/bsps/arm/stm32h7/hal/stm32h7xx_ll_usart.c @@ -1,496 +1,495 @@ -/**
- ******************************************************************************
- * @file stm32h7xx_ll_usart.c
- * @author MCD Application Team
- * @brief USART LL module driver.
- ******************************************************************************
- * @attention
- *
- * <h2><center>© Copyright (c) 2017 STMicroelectronics.
- * All rights reserved.</center></h2>
- *
- * This software component is licensed by ST under BSD 3-Clause license,
- * the "License"; You may not use this file except in compliance with the
- * License. You may obtain a copy of the License at:
- * opensource.org/licenses/BSD-3-Clause
- *
- ******************************************************************************
- */
-#if defined(USE_FULL_LL_DRIVER) || defined(__rtems__)
-
-/* 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 ---------------------------------------------------------*/
-/* 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)
-
-/* __VALUE__ BRR content must be lower than or equal to 0xFFFF. */
-#define IS_LL_USART_BRR_MAX(__VALUE__) ((__VALUE__) <= 0x0000FFFFU)
-
-#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(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, 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));
-
- /* Check BRR is lower than or equal to 0xFFFF */
- assert_param(IS_LL_USART_BRR_MAX(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 = 9600U;
- 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, 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)
- {
- /*---------------------------- USART CR2 Configuration -----------------------*/
- /* If Clock signal has to be output */
- if (USART_ClockInitStruct->ClockOutput == LL_USART_CLOCK_DISABLE)
- {
- /* Deactivate Clock signal delivery :
- * - Disable Clock Output: USART_CR2_CLKEN cleared
- */
- LL_USART_DisableSCLKOutput(USARTx);
- }
- else
- {
- /* 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:
- * - Enable Clock Output: USART_CR2_CLKEN set
- * - 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_CR2_CLKEN | 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 */
-
-/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
-
+/** + ****************************************************************************** + * @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) || defined(__rtems__) + +/* 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 */ + + |