motor_ctl-2/Core/Src/usart.c

/**
  ******************************************************************************
  * File Name          : USART.c
  * Description        : This file provides code for the configuration
  *                      of the USART instances.
  ******************************************************************************
  ** This notice applies to any and all portions of this file
  * that are not between comment pairs USER CODE BEGIN and
  * USER CODE END. Other portions of this file, whether 
  * inserted by the user or by software development tools
  * are owned by their respective copyright owners.
  *
  * COPYRIGHT(c) 2019 STMicroelectronics
  *
  * Redistribution and use in source and binary forms, with or without modification,
  * are permitted provided that the following conditions are met:
  *   1. Redistributions of source code must retain the above copyright notice,
  *      this list of conditions and the following disclaimer.
  *   2. Redistributions in binary form must reproduce the above copyright notice,
  *      this list of conditions and the following disclaimer in the documentation
  *      and/or other materials provided with the distribution.
  *   3. Neither the name of STMicroelectronics nor the names of its contributors
  *      may be used to endorse or promote products derived from this software
  *      without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "usart.h"

#include "gpio.h"

/* USER CODE BEGIN 0 */
uint8_t UART_RxBuff3[255];
USART_Buf_TypeDef UART_RxBuff_Struct3 = {255,0,0,0,0,UART_RxBuff3,&huart3};
uint8_t UART_TxBuff3[255];
USART_Buf_TypeDef UART_TxBuff_Struct3 = {255,0,0,0,0,UART_TxBuff3,&huart3};

/* USER CODE END 0 */

UART_HandleTypeDef huart3;

/* USART3 init function */

void MX_USART3_UART_Init(void)
{

  huart3.Instance = USART3;
  huart3.Init.BaudRate = 9600;
  huart3.Init.WordLength = UART_WORDLENGTH_8B;
  huart3.Init.StopBits = UART_STOPBITS_1;
  huart3.Init.Parity = UART_PARITY_NONE;
  huart3.Init.Mode = UART_MODE_TX_RX;
  huart3.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart3.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_UART_Init(&huart3) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }

}

void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
{

  GPIO_InitTypeDef GPIO_InitStruct;
  if(uartHandle->Instance==USART3)
  {
  /* USER CODE BEGIN USART3_MspInit 0 */

  /* USER CODE END USART3_MspInit 0 */
    /* USART1 clock enable */
    __HAL_RCC_USART3_CLK_ENABLE();
  
    /**USART1 GPIO Configuration    
    PC10     ------> USART3_TX
    PC11     ------> USART3_RX 
    */
    GPIO_InitStruct.Pin = GPIO_PIN_10;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
    HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

    GPIO_InitStruct.Pin = GPIO_PIN_11;
    GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

    __HAL_AFIO_REMAP_USART3_PARTIAL();

    /* USART1 interrupt Init */
    HAL_NVIC_SetPriority(USART3_IRQn, 1, 1);
    HAL_NVIC_EnableIRQ(USART3_IRQn);
  /* USER CODE BEGIN USART3_MspInit 1 */
    __HAL_UART_ENABLE_IT(&huart3, UART_IT_PE);

    /* Enable the UART Error Interrupt: (Frame error, noise error, overrun error) */
    __HAL_UART_ENABLE_IT(&huart3, UART_IT_ERR);

    /* Enable the UART Data Register not empty Interrupt */
    __HAL_UART_ENABLE_IT(&huart3, UART_IT_RXNE);
  /* USER CODE END USART3_MspInit 1 */
  }
}

void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
{

  if(uartHandle->Instance==USART3)
  {
  /* USER CODE BEGIN USART3_MspDeInit 0 */

  /* USER CODE END USART3_MspDeInit 0 */
    /* Peripheral clock disable */
    __HAL_RCC_USART3_CLK_DISABLE();
  
    /**USART1 GPIO Configuration    
    PC10     ------> USART3_TX
    PC11     ------> USART3_RX 
    */
    HAL_GPIO_DeInit(GPIOC, GPIO_PIN_10|GPIO_PIN_11);

    /* USART1 interrupt Deinit */
    HAL_NVIC_DisableIRQ(USART3_IRQn);
  /* USER CODE BEGIN USART3_MspDeInit 1 */

  /* USER CODE END USART3_MspDeInit 1 */
  }
} 

/* USER CODE BEGIN 1 */
uint8_t UART_ReadChar(USART_Buf_TypeDef * ptRx, uint8_t ucNum)	 
{	
	uint8_t ucData;
	uint16_t  i;
	i = ucNum;
	if ((*ptRx).ucBufCnt >= ucNum)
	 {
		i += (*ptRx).ucBufRdInde;
		if (i >= (*ptRx).ucBufSize)
		{	
			i -=((*ptRx).ucBufSize);
		}
	 }
	else
	 {
	  i=0;
	 }
	ucData = *((*ptRx).pcBufAddr + i);
	return ucData;
}

void UART_DelChar(USART_Buf_TypeDef * ptRx, uint8_t ucNum)	 
{	
	uint16_t i;
	if ((*ptRx).ucBufCnt >= ucNum)	
	{	
		__HAL_UART_DISABLE_IT(ptRx->ptUartHandel,UART_IT_RXNE);//关接收中断
		(*ptRx).ucBufCnt -= ucNum;	
		__HAL_UART_ENABLE_IT(ptRx->ptUartHandel,UART_IT_RXNE);//开接收中断
		i = ucNum;
		i += (*ptRx).ucBufRdInde;
		if (i >= (*ptRx).ucBufSize)
		{
		  i -= (*ptRx).ucBufSize;
		}
		(*ptRx).ucBufRdInde = i;
	}
	else
	{  
		__HAL_UART_DISABLE_IT(ptRx->ptUartHandel,UART_IT_RXNE);//关接收中断
   	    i = (*ptRx).ucBufCnt;
        (*ptRx).ucBufCnt = 0;
		__HAL_UART_ENABLE_IT(ptRx->ptUartHandel,UART_IT_RXNE);//开接收中断
        i += (*ptRx).ucBufRdInde;
		if (i >= (*ptRx).ucBufSize)
		{
		  i -= (*ptRx).ucBufSize;
		}
		(*ptRx).ucBufRdInde = i;
	 }
}

void UART_PutChar(USART_Buf_TypeDef * ptTx, uint8_t ucData)
{	
	while ((*ptTx).ucBufCnt == (*ptTx).ucBufSize);			 //发送缓冲满，等待。若有此情况建议增大缓冲区
	__HAL_UART_DISABLE_IT(ptTx->ptUartHandel,UART_IT_TXE);//关发送中断
	if((*ptTx).ucBufCnt == 0)
	{
		if(__HAL_UART_GET_FLAG(ptTx->ptUartHandel, UART_FLAG_TXE)== SET) //check if transmit data register full or not
		{
			ptTx->ptUartHandel->Instance->DR = ucData;
			__HAL_UART_ENABLE_IT(ptTx->ptUartHandel,UART_IT_TXE);//开发送中断
			return;
		}
	}	
	*((*ptTx).pcBufAddr + (*ptTx).ucBufWrInde) = ucData;
	if(++(*ptTx).ucBufWrInde == (*ptTx).ucBufSize)
	{
	  (*ptTx).ucBufWrInde = 0;
	}
	++(*ptTx).ucBufCnt;
	__HAL_UART_ENABLE_IT(ptTx->ptUartHandel,UART_IT_TXE);//开发送中断
}

void UART_SendData(USART_Buf_TypeDef * ptTx, uint8_t* Data, uint8_t Length)
{
  uint8_t i;
	
	for(i=0; i<Length; i++)
	{
	  UART_PutChar(ptTx, Data[i]);
	}
}

void USARTx_Rx_IRQ(USART_Buf_TypeDef *USARTx_RxBuf_Struct)
{
	uint8_t ucData;	
	if(__HAL_UART_GET_FLAG(USARTx_RxBuf_Struct->ptUartHandel,UART_FLAG_RXNE) != RESET)   //接收中断
  {
			ucData = (uint8_t)(USARTx_RxBuf_Struct->ptUartHandel->Instance->DR & 0x01FF);
			
	  	if(((USARTx_RxBuf_Struct->ptUartHandel->Instance->SR) & 0x0000) == 0)//无错误
	  	{
	    	*((* USARTx_RxBuf_Struct).pcBufAddr + (* USARTx_RxBuf_Struct).ucBufWrInde) = ucData;         
				if(++(* USARTx_RxBuf_Struct).ucBufWrInde >= (* USARTx_RxBuf_Struct).ucBufSize)
				{
		  		  (* USARTx_RxBuf_Struct).ucBufWrInde = 0; 
				}	
				if(++(* USARTx_RxBuf_Struct).ucBufCnt > (* USARTx_RxBuf_Struct).ucBufSize)  
				{
		   			(* USARTx_RxBuf_Struct).ucBufCnt = (* USARTx_RxBuf_Struct).ucBufSize;  
		   			(* USARTx_RxBuf_Struct).ucBufOvf = 1;
				}
	    }
		__HAL_UART_CLEAR_OREFLAG(USARTx_RxBuf_Struct->ptUartHandel);
  }
}

void USARTx_Tx_IRQ(USART_Buf_TypeDef *USARTx_TxBuf_Struct)
{
	if((__HAL_UART_GET_FLAG(USARTx_TxBuf_Struct->ptUartHandel, UART_FLAG_TXE) != RESET) && (__HAL_UART_GET_IT_SOURCE(USARTx_TxBuf_Struct->ptUartHandel, UART_IT_TXE) != RESET))        //发送完成中断
   {
      
		 __HAL_UART_CLEAR_FLAG(USARTx_TxBuf_Struct->ptUartHandel,UART_FLAG_TXE);
	  	if((* USARTx_TxBuf_Struct).ucBufCnt)
	  	{
		 		--(* USARTx_TxBuf_Struct).ucBufCnt;
				USARTx_TxBuf_Struct->ptUartHandel->Instance->DR = *(USARTx_TxBuf_Struct->pcBufAddr + USARTx_TxBuf_Struct->ucBufRdInde);		
		 		if(++(* USARTx_TxBuf_Struct).ucBufRdInde >= (* USARTx_TxBuf_Struct).ucBufSize)
				{
		   		  (* USARTx_TxBuf_Struct).ucBufRdInde = 0;
				}
	  	}
			else
			{
				/* Disable the UART Transmit Data Register Empty Interrupt */
				__HAL_UART_DISABLE_IT(USARTx_TxBuf_Struct->ptUartHandel, UART_IT_TXE);
			}
   } 
}
/* USER CODE END 1 */

/**
  * @}
  */

/**
  * @}
  */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/