mirror of
https://github.com/EFeru/hoverboard-sideboard-hack-STM.git
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ee6ab3a886
- the UART communication is improved based on UART Idle line detection interrupt - an Rx ring buffer is used to manage the UART incoming data - both Tx and Rx are efficiently handled using DMA - fixed #1 Other: - minor visual improvements
154 lines
4.5 KiB
C
154 lines
4.5 KiB
C
/**
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******************************************************************************
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* File Name : USART.c
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* Description : 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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* <h2><center>© Copyright (c) 2020 STMicroelectronics.
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* All rights reserved.</center></h2>
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*
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* This software component is licensed by ST under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "usart.h"
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/* USER CODE BEGIN 0 */
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/* USER CODE END 0 */
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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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/* USART2 init function */
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void MX_USART2_UART_Init(void)
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{
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huart2.Instance = USART2;
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huart2.Init.BaudRate = USART_MAIN_BAUD;
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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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}
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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==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_PULLUP;
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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_CIRCULAR;
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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, 0, 0);
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HAL_NVIC_EnableIRQ(USART2_IRQn);
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/* USER CODE BEGIN USART2_MspInit 1 */
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__HAL_UART_ENABLE_IT (uartHandle, UART_IT_IDLE); // Enable the USART IDLE line detection interrupt
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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==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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/* USER CODE END 1 */
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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