From 86608c6770cf08c138a2bdab5855072f64be09ef Mon Sep 17 00:00:00 2001 From: joshua Date: Sat, 30 Dec 2023 23:54:31 -0500 Subject: initial commit --- .../STM32H7xx_HAL_Driver/Src/stm32h7xx_ll_usart.c | 495 +++++++++++++++++++++ 1 file changed, 495 insertions(+) create mode 100644 Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_ll_usart.c (limited to 'Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_ll_usart.c') 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 */ + + -- cgit v1.2.3