STM32H750XB_RT-THREAD/21-DMA—直接存储区访问/DMA—存储器到外设模式/User/usart/bsp_usart_dma.c

/**
  ******************************************************************************
  * @file    bsp_debug_usart.c
  * @author  fire
  * @version V1.0
  * @date    2016-xx-xx
  * @brief   ʹ<EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD>1<EFBFBD><EFBFBD><EFBFBD>ض<EFBFBD><EFBFBD><EFBFBD>c<EFBFBD><EFBFBD>printf<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>usart<EFBFBD>˿ڣ<EFBFBD><EFBFBD>жϽ<EFBFBD><EFBFBD><EFBFBD>ģʽ
  ******************************************************************************
  * @attention
  *
  * ʵ<EFBFBD><EFBFBD>ƽ̨:Ұ<EFBFBD><EFBFBD>  STM32 H750 <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>  
  * <EFBFBD><EFBFBD>̳    :http://www.firebbs.cn
  * <EFBFBD>Ա<EFBFBD>    :http://firestm32.taobao.com
  *
  ******************************************************************************
  */ 
  
#include "./usart/bsp_usart_dma.h"

DMA_HandleTypeDef DMA_Handle;
UART_HandleTypeDef UartHandle;

extern uint8_t ucTemp;  
 /**
  * @brief  DEBUG_USART GPIO <EFBFBD><EFBFBD><EFBFBD><EFBFBD>,<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģʽ<EFBFBD><EFBFBD><EFBFBD>á<EFBFBD>115200 8-N-1
  * @param  <EFBFBD><EFBFBD>
  * @retval <EFBFBD><EFBFBD>
  */  
void DEBUG_USART_Config(void)
{
    GPIO_InitTypeDef GPIO_InitStruct;

    RCC_PeriphCLKInitTypeDef RCC_PeriphClkInit;
        
    DEBUG_USART_RX_GPIO_CLK_ENABLE();
    DEBUG_USART_TX_GPIO_CLK_ENABLE();
    
    /* <20><><EFBFBD>ô<EFBFBD><C3B4><EFBFBD>1ʱ<31><CAB1>Դ*/
		RCC_PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART1;
		RCC_PeriphClkInit.Usart16ClockSelection = RCC_USART16CLKSOURCE_D2PCLK2;
		HAL_RCCEx_PeriphCLKConfig(&RCC_PeriphClkInit);
    /* ʹ<>ܴ<EFBFBD><DCB4><EFBFBD>1ʱ<31><CAB1> */
    DEBUG_USART_CLK_ENABLE();

    /* <20><><EFBFBD><EFBFBD>Tx<54><78><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD>ù<EFBFBD><C3B9><EFBFBD>  */
    GPIO_InitStruct.Pin = DEBUG_USART_TX_PIN;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_PULLUP;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
    GPIO_InitStruct.Alternate = DEBUG_USART_TX_AF;
    HAL_GPIO_Init(DEBUG_USART_TX_GPIO_PORT, &GPIO_InitStruct);
    
    /* <20><><EFBFBD><EFBFBD>Rx<52><78><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD>ù<EFBFBD><C3B9><EFBFBD> */
    GPIO_InitStruct.Pin = DEBUG_USART_RX_PIN;
    GPIO_InitStruct.Alternate = DEBUG_USART_RX_AF;
    HAL_GPIO_Init(DEBUG_USART_RX_GPIO_PORT, &GPIO_InitStruct); 
    
    /* <20><><EFBFBD>ô<EFBFBD>DEBUG_USART ģʽ */
    UartHandle.Instance = DEBUG_USART;
    UartHandle.Init.BaudRate = 115200;
    UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
    UartHandle.Init.StopBits = UART_STOPBITS_1;
    UartHandle.Init.Parity = UART_PARITY_NONE;
    UartHandle.Init.Mode = UART_MODE_TX_RX;
    UartHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
    UartHandle.Init.OverSampling = UART_OVERSAMPLING_16;
    UartHandle.Init.OneBitSampling = UART_ONEBIT_SAMPLING_DISABLED;
    UartHandle.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
    HAL_UART_Init(&UartHandle);
}

/**
  * @brief  USART1 TX DMA <EFBFBD><EFBFBD><EFBFBD>ã<EFBFBD><EFBFBD>ڴ浽<EFBFBD><EFBFBD><EFBFBD><EFBFBD>(USART1->DR)
  * @param  <EFBFBD><EFBFBD>
  * @retval <EFBFBD><EFBFBD>
  */
void USART_DMA_Config(void)
{
  /*<2A><><EFBFBD><EFBFBD>DMAʱ<41><CAB1>*/
  DEBUG_USART_DMA_CLK_ENABLE();
  
  DMA_Handle.Instance = DEBUG_USART_DMA_STREAM;
  /* Deinitialize the stream for new transfer */
  HAL_DMA_DeInit(&DMA_Handle);
  
  /*usart1 tx<74><78>Ӧdma2<61><32>ͨ<EFBFBD><CDA8>4<EFBFBD><34><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>7*/	
  DMA_Handle.Init.Request = DMA_REQUEST_USART1_TX; 
  /*<2A><><EFBFBD>򣺴<EFBFBD><F2A3BAB4>ڴ浽<DAB4><E6B5BD><EFBFBD><EFBFBD>*/		
  DMA_Handle.Init.Direction= DMA_MEMORY_TO_PERIPH;	
  /*<2A><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD>*/	    
  DMA_Handle.Init.PeriphInc = DMA_PINC_DISABLE; 
  /*<2A>ڴ<EFBFBD><DAB4><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD>*/
  DMA_Handle.Init.MemInc = DMA_MINC_ENABLE;	
  /*<2A><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݵ<EFBFBD>λ*/	
  DMA_Handle.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
  /*<2A>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD>ݵ<EFBFBD>λ 8bit*/
  DMA_Handle.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;	
  /*DMAģʽ<C4A3><CABD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѭ<EFBFBD><D1AD>*/
  DMA_Handle.Init.Mode = DMA_CIRCULAR;	 
  /*<2A><><EFBFBD>ȼ<EFBFBD><C8BC><EFBFBD><EFBFBD><EFBFBD>*/	
  DMA_Handle.Init.Priority = DMA_PRIORITY_MEDIUM;      
  /*<2A><><EFBFBD><EFBFBD>FIFO*/
  DMA_Handle.Init.FIFOMode = DMA_FIFOMODE_DISABLE;        
  DMA_Handle.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;    
  /*<2A>洢<EFBFBD><E6B4A2>ͻ<EFBFBD><CDBB><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 1<><31><EFBFBD><EFBFBD><EFBFBD><EFBFBD>*/
  DMA_Handle.Init.MemBurst = DMA_MBURST_SINGLE;    
  /*<2A><><EFBFBD><EFBFBD>ͻ<EFBFBD><CDBB><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 1<><31><EFBFBD><EFBFBD><EFBFBD><EFBFBD>*/
  DMA_Handle.Init.PeriphBurst = DMA_PBURST_SINGLE;    
  /*<2A><><EFBFBD><EFBFBD>DMA2<41><32><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>7*/		   
  /* Configure the DMA stream */
  HAL_DMA_Init(&DMA_Handle); 
  
   /* Associate the DMA handle */
  __HAL_LINKDMA(&UartHandle, hdmatx, DMA_Handle);

}


/*****************  <20><><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD> **********************/
void Usart_SendString(uint8_t *str)
{
	unsigned int k=0;
  do 
  {
      HAL_UART_Transmit( &UartHandle,(uint8_t *)(str + k) ,1,1000);
      k++;
  } while(*(str + k)!='\0');
  
}
///<2F>ض<EFBFBD><D8B6><EFBFBD>c<EFBFBD>⺯<EFBFBD><E2BAAF>printf<74><66><EFBFBD><EFBFBD><EFBFBD><EFBFBD>DEBUG_USART<52><54><EFBFBD>ض<EFBFBD><D8B6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><CAB9>printf<74><66><EFBFBD><EFBFBD>
int fputc(int ch, FILE *f)
{
	/* <20><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>ֽ<EFBFBD><D6BD><EFBFBD><EFBFBD>ݵ<EFBFBD><DDB5><EFBFBD><EFBFBD><EFBFBD>DEBUG_USART */
	HAL_UART_Transmit(&UartHandle, (uint8_t *)&ch, 1, 1000);	
	
	return (ch);
}

///<2F>ض<EFBFBD><D8B6><EFBFBD>c<EFBFBD>⺯<EFBFBD><E2BAAF>scanf<6E><66><EFBFBD><EFBFBD><EFBFBD><EFBFBD>DEBUG_USART<52><54><EFBFBD><EFBFBD>д<EFBFBD><D0B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><CAB9>scanf<6E><66>getchar<61>Ⱥ<EFBFBD><C8BA><EFBFBD>
int fgetc(FILE *f)
{
		
	int ch;
	HAL_UART_Receive(&UartHandle, (uint8_t *)&ch, 1, 1000);	
	return (ch);
}
/*********************************************END OF FILE**********************/