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277 lines
7.1 KiB
277 lines
7.1 KiB
/**
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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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* <h2><center>© Copyright (c) 2022 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 Ultimate Liberty license
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* SLA0044, the "License"; You may not use this file except in compliance with
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* the License. You may obtain a copy of the License at:
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* www.st.com/SLA0044
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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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#if EN_USART1_RX //如果使能了接收
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//串口1中断服务程序
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//注意,读取USARTx->SR能避免莫名其妙的错误
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uint8_t USART_RX_BUF[USART_REC_LEN]; //接收缓冲,最大USART_REC_LEN个字节.
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//接收状态
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//bit15， 接收完成标志
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//bit14， 接收到0x0d
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//bit13~0， 接收到的有效字节数目
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uint16_t USART_RX_STA=0; //接收状态标记
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uint8_t aRxBuffer[RXBUFFERSIZE];//HAL库使用的串口接收缓冲
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#endif
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//加入以下代码,支持printf函数,而不需要选择use MicroLIB
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//#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
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#include "stdio.h"
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#if 1
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__asm (".global __use_no_semihosting\n\t");
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//标准库需要的支持函数
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//struct __FILE
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//{
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// int handle;
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//};
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FILE __stdout;
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//定义_sys_exit()以避免使用半主机模式
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void _sys_exit(int x)
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{
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x = x;
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}
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//重定义fputc函数
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int fputc(int ch, FILE *f)
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{
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USART1->SR;//读USARTx->SR能够避免首字节丢失的情况
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USART1->DR = (uint8_t) ch;
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while((USART1->SR&0X40)==0);//循环发送,直到发送完毕
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return 0;
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}
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/*********************USART Send one byte**********************/
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void USART_SendByte( char Data)
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{
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USART1->SR;//读USARTx->SR能够避免首字节丢失的情况
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USART1->DR = (uint8_t) Data;
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while((USART1->SR&0X40)==0);//循环发送,直到发送完毕
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}
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/*********************USART SendString**********************/
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void USART_SendString(char *nbuff)
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{
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while(*nbuff!='\0')
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{
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USART_SendByte(*(nbuff++));
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while((USART1->SR&0X40)==0);//循环发送,直到发送完毕
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}
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}
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#endif
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/* USER CODE END 0 */
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UART_HandleTypeDef huart1;
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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_RX;
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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_UART_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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HAL_UART_Receive_IT(&huart1, (uint8_t *)aRxBuffer, RXBUFFERSIZE);//该函数会开启接收中断：标志位UART_IT_RXNE，并且设置接收缓冲以及接收缓冲接收最大数据量
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/* USER CODE END USART1_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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PA10 ------> USART1_RX
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*/
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GPIO_InitStruct.Pin = GPIO_PIN_9;
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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_10;
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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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/* USART1 interrupt Init */
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HAL_NVIC_SetPriority(USART1_IRQn, 0, 0);
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HAL_NVIC_EnableIRQ(USART1_IRQn);
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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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}
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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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PA10 ------> USART1_RX
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*/
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HAL_GPIO_DeInit(GPIOA, GPIO_PIN_9|GPIO_PIN_10);
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/* USART1 interrupt Deinit */
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HAL_NVIC_DisableIRQ(USART1_IRQn);
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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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}
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/* USER CODE BEGIN 1 */
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#if HAL_USART_ISR_EN //是否使用HAL库自带的串口接收中断函数
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void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
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{
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if(huart->Instance==USART1)//如果是串口1
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{
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if((USART_RX_STA&0x8000)==0)//接收未完成
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{
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if(USART_RX_STA&0x4000)//接收到了0x0d
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{
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if(aRxBuffer[0]!=0x0a)USART_RX_STA=0;//接收错误,重新开始
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else USART_RX_STA|=0x8000; //接收完成了
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}
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else //还没收到0X0D
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{
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if(aRxBuffer[0]==0x0d)USART_RX_STA|=0x4000;
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else
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{
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USART_RX_BUF[USART_RX_STA&0X3FFF]=aRxBuffer[0] ;
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USART_RX_STA++;
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if(USART_RX_STA>(USART_REC_LEN-1))USART_RX_STA=0;//接收数据错误,重新开始接收
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}
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}
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}
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}
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}
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//串口1中断服务程序
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//使用此函数需要屏蔽HAL库自带的中断服务子函数stm32f1xx_it.c
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void USART1_IRQHandler(void)
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{
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uint32_t timeout=0;
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uint32_t maxDelay=0x1FFFF;
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#if SYSTEM_SUPPORT_OS //使用OS
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OSIntEnter();
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#endif
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HAL_UART_IRQHandler(&huart1); //调用HAL库中断处理公用函数
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timeout=0;
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while (HAL_UART_GetState(&huart1) != HAL_UART_STATE_READY)//等待就绪
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{
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timeout++;////超时处理
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if(timeout>maxDelay) break;
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}
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timeout=0;
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while(HAL_UART_Receive_IT(&huart1, (uint8_t *)aRxBuffer, RXBUFFERSIZE) != HAL_OK)//一次处理完成之后，重新开启中断并设置RxXferCount为1
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{
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timeout++; //超时处理
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if(timeout>maxDelay) break;
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}
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#if SYSTEM_SUPPORT_OS //使用OS
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OSIntExit();
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#endif
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}
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#else
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/*下面代码我们直接把中断控制逻辑写在中断服务函数内部。
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说明：采用HAL库处理逻辑，效率不高。
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使用此函数需要屏蔽HAL库自带的中断服务子函数stm32f1xx_it.c
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*/
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//串口1中断服务程序
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void USART1_IRQHandler(void)
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{
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uint8_t Res;
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#if SYSTEM_SUPPORT_OS //使用OS
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OSIntEnter();
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#endif
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if((__HAL_UART_GET_FLAG(&huart1,UART_FLAG_RXNE)!=RESET)) //接收中断(接收到的数据必须是0x0d 0x0a结尾)
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{
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Res=USART1->DR;
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if((USART_RX_STA&0x8000)==0)//接收未完成
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{
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if(USART_RX_STA&0x4000)//接收到了0x0d
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{
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if(Res!=0x0a)USART_RX_STA=0;//接收错误,重新开始
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else USART_RX_STA|=0x8000; //接收完成了
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}
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else //还没收到0X0D
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{
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if(Res==0x0d)USART_RX_STA|=0x4000;
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else
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{
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USART_RX_BUF[USART_RX_STA&0X3FFF]=Res ;
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USART_RX_STA++;
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if(USART_RX_STA>(USART_REC_LEN-1))USART_RX_STA=0;//接收数据错误,重新开始接收
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}
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}
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}
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}
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HAL_UART_IRQHandler(&huart1);
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#if SYSTEM_SUPPORT_OS //使用OS
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OSIntExit();
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#endif
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}
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#endif
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/* USER CODE END 1 */
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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