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_lpuart.c | 285 +++++++++++++++++++++ 1 file changed, 285 insertions(+) create mode 100644 Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_ll_lpuart.c (limited to 'Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_ll_lpuart.c') diff --git a/Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_ll_lpuart.c b/Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_ll_lpuart.c new file mode 100644 index 0000000..e6b7dc1 --- /dev/null +++ b/Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_ll_lpuart.c @@ -0,0 +1,285 @@ +/** + ****************************************************************************** + * @file stm32h7xx_ll_lpuart.c + * @author MCD Application Team + * @brief LPUART 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_lpuart.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 (LPUART1) + +/** @addtogroup LPUART_LL + * @{ + */ + +/* Private types -------------------------------------------------------------*/ +/* Private variables ---------------------------------------------------------*/ +/* Private constants ---------------------------------------------------------*/ +/** @addtogroup LPUART_LL_Private_Constants + * @{ + */ + +/* Definition of default baudrate value used for LPUART initialisation */ +#define LPUART_DEFAULT_BAUDRATE (9600U) + +/** + * @} + */ + + +/* Private macros ------------------------------------------------------------*/ +/** @addtogroup LPUART_LL_Private_Macros + * @{ + */ + +/* Check of parameters for configuration of LPUART registers */ + +#define IS_LL_LPUART_PRESCALER(__VALUE__) (((__VALUE__) == LL_LPUART_PRESCALER_DIV1) \ + || ((__VALUE__) == LL_LPUART_PRESCALER_DIV2) \ + || ((__VALUE__) == LL_LPUART_PRESCALER_DIV4) \ + || ((__VALUE__) == LL_LPUART_PRESCALER_DIV6) \ + || ((__VALUE__) == LL_LPUART_PRESCALER_DIV8) \ + || ((__VALUE__) == LL_LPUART_PRESCALER_DIV10) \ + || ((__VALUE__) == LL_LPUART_PRESCALER_DIV12) \ + || ((__VALUE__) == LL_LPUART_PRESCALER_DIV16) \ + || ((__VALUE__) == LL_LPUART_PRESCALER_DIV32) \ + || ((__VALUE__) == LL_LPUART_PRESCALER_DIV64) \ + || ((__VALUE__) == LL_LPUART_PRESCALER_DIV128) \ + || ((__VALUE__) == LL_LPUART_PRESCALER_DIV256)) + +/* __BAUDRATE__ Depending on constraints applicable for LPUART BRR register */ +/* value : */ +/* - fck must be in the range [3 x baudrate, 4096 x baudrate] */ +/* - LPUART_BRR register value should be >= 0x300 */ +/* - LPUART_BRR register value should be <= 0xFFFFF (20 bits) */ +/* Baudrate specified by the user should belong to [8, 33000000].*/ +#define IS_LL_LPUART_BAUDRATE(__BAUDRATE__) (((__BAUDRATE__) <= 33000000U) && ((__BAUDRATE__) >= 8U)) + +/* __VALUE__ BRR content must be greater than or equal to 0x300. */ +#define IS_LL_LPUART_BRR_MIN(__VALUE__) ((__VALUE__) >= 0x300U) + +/* __VALUE__ BRR content must be lower than or equal to 0xFFFFF. */ +#define IS_LL_LPUART_BRR_MAX(__VALUE__) ((__VALUE__) <= 0x000FFFFFU) + +#define IS_LL_LPUART_DIRECTION(__VALUE__) (((__VALUE__) == LL_LPUART_DIRECTION_NONE) \ + || ((__VALUE__) == LL_LPUART_DIRECTION_RX) \ + || ((__VALUE__) == LL_LPUART_DIRECTION_TX) \ + || ((__VALUE__) == LL_LPUART_DIRECTION_TX_RX)) + +#define IS_LL_LPUART_PARITY(__VALUE__) (((__VALUE__) == LL_LPUART_PARITY_NONE) \ + || ((__VALUE__) == LL_LPUART_PARITY_EVEN) \ + || ((__VALUE__) == LL_LPUART_PARITY_ODD)) + +#define IS_LL_LPUART_DATAWIDTH(__VALUE__) (((__VALUE__) == LL_LPUART_DATAWIDTH_7B) \ + || ((__VALUE__) == LL_LPUART_DATAWIDTH_8B) \ + || ((__VALUE__) == LL_LPUART_DATAWIDTH_9B)) + +#define IS_LL_LPUART_STOPBITS(__VALUE__) (((__VALUE__) == LL_LPUART_STOPBITS_1) \ + || ((__VALUE__) == LL_LPUART_STOPBITS_2)) + +#define IS_LL_LPUART_HWCONTROL(__VALUE__) (((__VALUE__) == LL_LPUART_HWCONTROL_NONE) \ + || ((__VALUE__) == LL_LPUART_HWCONTROL_RTS) \ + || ((__VALUE__) == LL_LPUART_HWCONTROL_CTS) \ + || ((__VALUE__) == LL_LPUART_HWCONTROL_RTS_CTS)) + +/** + * @} + */ + +/* Private function prototypes -----------------------------------------------*/ + +/* Exported functions --------------------------------------------------------*/ +/** @addtogroup LPUART_LL_Exported_Functions + * @{ + */ + +/** @addtogroup LPUART_LL_EF_Init + * @{ + */ + +/** + * @brief De-initialize LPUART registers (Registers restored to their default values). + * @param LPUARTx LPUART Instance + * @retval An ErrorStatus enumeration value: + * - SUCCESS: LPUART registers are de-initialized + * - ERROR: not applicable + */ +ErrorStatus LL_LPUART_DeInit(const USART_TypeDef *LPUARTx) +{ + ErrorStatus status = SUCCESS; + + /* Check the parameters */ + assert_param(IS_LPUART_INSTANCE(LPUARTx)); + + if (LPUARTx == LPUART1) + { + /* Force reset of LPUART peripheral */ + LL_APB4_GRP1_ForceReset(LL_APB4_GRP1_PERIPH_LPUART1); + + /* Release reset of LPUART peripheral */ + LL_APB4_GRP1_ReleaseReset(LL_APB4_GRP1_PERIPH_LPUART1); + } + else + { + status = ERROR; + } + + return (status); +} + +/** + * @brief Initialize LPUART registers according to the specified + * parameters in LPUART_InitStruct. + * @note As some bits in LPUART configuration registers can only be written when + * the LPUART is disabled (USART_CR1_UE bit =0), + * LPUART Peripheral should be in disabled state prior calling this function. + * Otherwise, ERROR result will be returned. + * @note Baud rate value stored in LPUART_InitStruct BaudRate field, should be valid (different from 0). + * @param LPUARTx LPUART Instance + * @param LPUART_InitStruct pointer to a @ref LL_LPUART_InitTypeDef structure + * that contains the configuration information for the specified LPUART peripheral. + * @retval An ErrorStatus enumeration value: + * - SUCCESS: LPUART registers are initialized according to LPUART_InitStruct content + * - ERROR: Problem occurred during LPUART Registers initialization + */ +ErrorStatus LL_LPUART_Init(USART_TypeDef *LPUARTx, const LL_LPUART_InitTypeDef *LPUART_InitStruct) +{ + ErrorStatus status = ERROR; + uint32_t periphclk; + + /* Check the parameters */ + assert_param(IS_LPUART_INSTANCE(LPUARTx)); + assert_param(IS_LL_LPUART_PRESCALER(LPUART_InitStruct->PrescalerValue)); + assert_param(IS_LL_LPUART_BAUDRATE(LPUART_InitStruct->BaudRate)); + assert_param(IS_LL_LPUART_DATAWIDTH(LPUART_InitStruct->DataWidth)); + assert_param(IS_LL_LPUART_STOPBITS(LPUART_InitStruct->StopBits)); + assert_param(IS_LL_LPUART_PARITY(LPUART_InitStruct->Parity)); + assert_param(IS_LL_LPUART_DIRECTION(LPUART_InitStruct->TransferDirection)); + assert_param(IS_LL_LPUART_HWCONTROL(LPUART_InitStruct->HardwareFlowControl)); + + /* LPUART needs to be in disabled state, in order to be able to configure some bits in + CRx registers. Otherwise (LPUART not in Disabled state) => return ERROR */ + if (LL_LPUART_IsEnabled(LPUARTx) == 0U) + { + /*---------------------------- LPUART CR1 Configuration ----------------------- + * Configure LPUARTx CR1 (LPUART Word Length, Parity and Transfer Direction bits) with parameters: + * - DataWidth: USART_CR1_M bits according to LPUART_InitStruct->DataWidth value + * - Parity: USART_CR1_PCE, USART_CR1_PS bits according to LPUART_InitStruct->Parity value + * - TransferDirection: USART_CR1_TE, USART_CR1_RE bits according to LPUART_InitStruct->TransferDirection value + */ + MODIFY_REG(LPUARTx->CR1, + (USART_CR1_M | USART_CR1_PCE | USART_CR1_PS | USART_CR1_TE | USART_CR1_RE), + (LPUART_InitStruct->DataWidth | LPUART_InitStruct->Parity | LPUART_InitStruct->TransferDirection)); + + /*---------------------------- LPUART CR2 Configuration ----------------------- + * Configure LPUARTx CR2 (Stop bits) with parameters: + * - Stop Bits: USART_CR2_STOP bits according to LPUART_InitStruct->StopBits value. + */ + LL_LPUART_SetStopBitsLength(LPUARTx, LPUART_InitStruct->StopBits); + + /*---------------------------- LPUART CR3 Configuration ----------------------- + * Configure LPUARTx CR3 (Hardware Flow Control) with parameters: + * - HardwareFlowControl: USART_CR3_RTSE, USART_CR3_CTSE bits according + * to LPUART_InitStruct->HardwareFlowControl value. + */ + LL_LPUART_SetHWFlowCtrl(LPUARTx, LPUART_InitStruct->HardwareFlowControl); + + /*---------------------------- LPUART BRR Configuration ----------------------- + * Retrieve Clock frequency used for LPUART Peripheral + */ + periphclk = LL_RCC_GetLPUARTClockFreq(LL_RCC_LPUART1_CLKSOURCE); + + /* Configure the LPUART 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) + && (LPUART_InitStruct->BaudRate != 0U)) + { + status = SUCCESS; + LL_LPUART_SetBaudRate(LPUARTx, + periphclk, + LPUART_InitStruct->PrescalerValue, + LPUART_InitStruct->BaudRate); + + /* Check BRR is greater than or equal to 0x300 */ + assert_param(IS_LL_LPUART_BRR_MIN(LPUARTx->BRR)); + + /* Check BRR is lower than or equal to 0xFFFFF */ + assert_param(IS_LL_LPUART_BRR_MAX(LPUARTx->BRR)); + } + + /*---------------------------- LPUART PRESC Configuration ----------------------- + * Configure LPUARTx PRESC (Prescaler) with parameters: + * - PrescalerValue: LPUART_PRESC_PRESCALER bits according to LPUART_InitStruct->PrescalerValue value. + */ + LL_LPUART_SetPrescaler(LPUARTx, LPUART_InitStruct->PrescalerValue); + } + + return (status); +} + +/** + * @brief Set each @ref LL_LPUART_InitTypeDef field to default value. + * @param LPUART_InitStruct pointer to a @ref LL_LPUART_InitTypeDef structure + * whose fields will be set to default values. + * @retval None + */ + +void LL_LPUART_StructInit(LL_LPUART_InitTypeDef *LPUART_InitStruct) +{ + /* Set LPUART_InitStruct fields to default values */ + LPUART_InitStruct->PrescalerValue = LL_LPUART_PRESCALER_DIV1; + LPUART_InitStruct->BaudRate = LPUART_DEFAULT_BAUDRATE; + LPUART_InitStruct->DataWidth = LL_LPUART_DATAWIDTH_8B; + LPUART_InitStruct->StopBits = LL_LPUART_STOPBITS_1; + LPUART_InitStruct->Parity = LL_LPUART_PARITY_NONE ; + LPUART_InitStruct->TransferDirection = LL_LPUART_DIRECTION_TX_RX; + LPUART_InitStruct->HardwareFlowControl = LL_LPUART_HWCONTROL_NONE; +} + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ + +#endif /* LPUART1 */ + +/** + * @} + */ + +#endif /* USE_FULL_LL_DRIVER */ -- cgit v1.2.3