270 lines
7.5 KiB
C
270 lines
7.5 KiB
C
/* USER CODE BEGIN Header */
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/**
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******************************************************************************
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* @file usart.c
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* @brief This file provides code for the configuration
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* of the USART instances.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2025 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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/* USER CODE END Header */
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/* Includes ------------------------------------------------------------------*/
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#include "usart.h"
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/* USER CODE BEGIN 0 */
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#include "string.h"
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#include <stdio.h>
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/* USER CODE END 0 */
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UART_HandleTypeDef huart1;
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UART_HandleTypeDef huart2;
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DMA_HandleTypeDef hdma_usart2_rx;
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DMA_HandleTypeDef hdma_usart2_tx;
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/* USART1 init function */
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void MX_USART1_UART_Init(void)
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{
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/* USER CODE BEGIN USART1_Init 0 */
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/* USER CODE END USART1_Init 0 */
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/* USER CODE BEGIN USART1_Init 1 */
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/* USER CODE END USART1_Init 1 */
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huart1.Instance = USART1;
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huart1.Init.BaudRate = 115200;
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huart1.Init.WordLength = UART_WORDLENGTH_8B;
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huart1.Init.StopBits = UART_STOPBITS_1;
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huart1.Init.Parity = UART_PARITY_NONE;
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huart1.Init.Mode = UART_MODE_TX;
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huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
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huart1.Init.OverSampling = UART_OVERSAMPLING_16;
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if (HAL_HalfDuplex_Init(&huart1) != HAL_OK)
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{
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Error_Handler();
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}
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/* USER CODE BEGIN USART1_Init 2 */
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/* USER CODE END USART1_Init 2 */
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}
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/* USART2 init function */
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void MX_USART2_UART_Init(void)
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{
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/* USER CODE BEGIN USART2_Init 0 */
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/* USER CODE END USART2_Init 0 */
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/* USER CODE BEGIN USART2_Init 1 */
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/* USER CODE END USART2_Init 1 */
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huart2.Instance = USART2;
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huart2.Init.BaudRate = 115200;
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huart2.Init.WordLength = UART_WORDLENGTH_8B;
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huart2.Init.StopBits = UART_STOPBITS_1;
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huart2.Init.Parity = UART_PARITY_NONE;
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huart2.Init.Mode = UART_MODE_TX_RX;
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huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
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huart2.Init.OverSampling = UART_OVERSAMPLING_16;
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if (HAL_UART_Init(&huart2) != HAL_OK)
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{
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Error_Handler();
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}
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/* USER CODE BEGIN USART2_Init 2 */
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/* USER CODE END USART2_Init 2 */
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}
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void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
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{
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GPIO_InitTypeDef GPIO_InitStruct = {0};
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if(uartHandle->Instance==USART1)
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{
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/* USER CODE BEGIN USART1_MspInit 0 */
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/* USER CODE END USART1_MspInit 0 */
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/* USART1 clock enable */
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__HAL_RCC_USART1_CLK_ENABLE();
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__HAL_RCC_GPIOA_CLK_ENABLE();
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/**USART1 GPIO Configuration
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PA9 ------> USART1_TX
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*/
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GPIO_InitStruct.Pin = GPIO_PIN_9;
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GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
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HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
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/* USER CODE BEGIN USART1_MspInit 1 */
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/* USER CODE END USART1_MspInit 1 */
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}
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else if(uartHandle->Instance==USART2)
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{
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/* USER CODE BEGIN USART2_MspInit 0 */
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/* USER CODE END USART2_MspInit 0 */
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/* USART2 clock enable */
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__HAL_RCC_USART2_CLK_ENABLE();
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__HAL_RCC_GPIOA_CLK_ENABLE();
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/**USART2 GPIO Configuration
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PA2 ------> USART2_TX
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PA3 ------> USART2_RX
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*/
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GPIO_InitStruct.Pin = GPIO_PIN_2;
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GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
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HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
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GPIO_InitStruct.Pin = GPIO_PIN_3;
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GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
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/* USART2 DMA Init */
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/* USART2_RX Init */
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hdma_usart2_rx.Instance = DMA1_Channel6;
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hdma_usart2_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
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hdma_usart2_rx.Init.PeriphInc = DMA_PINC_DISABLE;
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hdma_usart2_rx.Init.MemInc = DMA_MINC_ENABLE;
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hdma_usart2_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
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hdma_usart2_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
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hdma_usart2_rx.Init.Mode = DMA_NORMAL;
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hdma_usart2_rx.Init.Priority = DMA_PRIORITY_LOW;
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if (HAL_DMA_Init(&hdma_usart2_rx) != HAL_OK)
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{
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Error_Handler();
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}
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__HAL_LINKDMA(uartHandle,hdmarx,hdma_usart2_rx);
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/* USART2_TX Init */
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hdma_usart2_tx.Instance = DMA1_Channel7;
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hdma_usart2_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
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hdma_usart2_tx.Init.PeriphInc = DMA_PINC_DISABLE;
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hdma_usart2_tx.Init.MemInc = DMA_MINC_ENABLE;
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hdma_usart2_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
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hdma_usart2_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
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hdma_usart2_tx.Init.Mode = DMA_NORMAL;
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hdma_usart2_tx.Init.Priority = DMA_PRIORITY_LOW;
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if (HAL_DMA_Init(&hdma_usart2_tx) != HAL_OK)
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{
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Error_Handler();
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}
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__HAL_LINKDMA(uartHandle,hdmatx,hdma_usart2_tx);
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/* USART2 interrupt Init */
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HAL_NVIC_SetPriority(USART2_IRQn, 5, 0);
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HAL_NVIC_EnableIRQ(USART2_IRQn);
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/* USER CODE BEGIN USART2_MspInit 1 */
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/* USER CODE END USART2_MspInit 1 */
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}
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}
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void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
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{
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if(uartHandle->Instance==USART1)
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{
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/* USER CODE BEGIN USART1_MspDeInit 0 */
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/* USER CODE END USART1_MspDeInit 0 */
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/* Peripheral clock disable */
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__HAL_RCC_USART1_CLK_DISABLE();
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/**USART1 GPIO Configuration
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PA9 ------> USART1_TX
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*/
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HAL_GPIO_DeInit(GPIOA, GPIO_PIN_9);
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/* USER CODE BEGIN USART1_MspDeInit 1 */
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/* USER CODE END USART1_MspDeInit 1 */
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}
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else if(uartHandle->Instance==USART2)
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{
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/* USER CODE BEGIN USART2_MspDeInit 0 */
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/* USER CODE END USART2_MspDeInit 0 */
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/* Peripheral clock disable */
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__HAL_RCC_USART2_CLK_DISABLE();
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/**USART2 GPIO Configuration
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PA2 ------> USART2_TX
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PA3 ------> USART2_RX
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*/
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HAL_GPIO_DeInit(GPIOA, GPIO_PIN_2|GPIO_PIN_3);
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/* USART2 DMA DeInit */
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HAL_DMA_DeInit(uartHandle->hdmarx);
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HAL_DMA_DeInit(uartHandle->hdmatx);
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/* USART2 interrupt Deinit */
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HAL_NVIC_DisableIRQ(USART2_IRQn);
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/* USER CODE BEGIN USART2_MspDeInit 1 */
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/* USER CODE END USART2_MspDeInit 1 */
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}
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}
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/* USER CODE BEGIN 1 */
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uint8_t uart_buffer[255],uart2_data[255],uart2_datalength;
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__weak void MR16_NotifyUARTIdle(void) { }
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void USAR_UART_IDLECallback(UART_HandleTypeDef *huart)
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{
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if (huart == NULL) return;
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if (huart->Instance != USART2) return; // 目前仅支持 USART2 的 DMA 空闲处理
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HAL_UART_DMAStop(huart); // 停止 DMA
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uart2_datalength = 255 - __HAL_DMA_GET_COUNTER(&hdma_usart2_rx); // 计算接收长度（针对 USART2）
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printf("Receive Data(length = %d): ", uart2_datalength);
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HAL_UART_Transmit(huart, uart_buffer, uart2_datalength, 0x200); // 回显/打印接收数据
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printf("\r\n");
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strcpy((char*)uart2_data,(char*)uart_buffer);
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memset(uart_buffer, 0, uart2_datalength); // 清空已读数据
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HAL_UART_Receive_DMA(huart, (uint8_t*)uart_buffer, 255); // 重启 DMA 接收
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MR16_NotifyUARTIdle();
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}
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void USER_UART_IRQHandler(UART_HandleTypeDef *huart)
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{
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if (huart == NULL) return;
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// 仅处理 USART2 的 IDLE 中断（与中断向量里调用保持一致）
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if (huart->Instance == USART2)
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{
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if (__HAL_UART_GET_FLAG(huart, UART_FLAG_IDLE) != RESET) // 检测 IDLE
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{
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__HAL_UART_CLEAR_IDLEFLAG(huart); // 清除 IDLE 标志，避免重复进入中断
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printf("\r\nUART2 Idle IRQ Detected\r\n");
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USAR_UART_IDLECallback(huart); // 调用具体处理
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}
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}
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}
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/* USER CODE END 1 */
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