【复旦微FM33LC046N评测】+学习uart0的dma收发

chrisrh

【复旦微FM33LC046N评测】+学习uart0的dma收发 [复制链接]

 

前段家里事比较多，一直没空下来时间，近日学习了一下UART0的DMA示例：

UART0 DMA发送示例

UART0 DMA接收示例

 

将两个例程揉合跑了一下，

UART0 初始化函数在mf_config.c中，

UART0_TX发送口为PA3；

UART0_RX接收口为PA2；

函数初始化配置如下：

/**
  * [url=home.php?mod=space&uid=159083]@brief[/url]  UART0 Initialization function
  * @param  void
  * @retval None
  */
void MF_UART0_TX_Init(void)
{
    FL_GPIO_InitTypeDef    GPIO_InitStruct;

    FL_UART_InitTypeDef    defaultInitStruct;

    GPIO_InitStruct.pin = FL_GPIO_PIN_3;
    GPIO_InitStruct.mode = FL_GPIO_MODE_DIGITAL;
    GPIO_InitStruct.outputType = FL_GPIO_OUTPUT_PUSHPULL;
    GPIO_InitStruct.pull = DISABLE;
    GPIO_InitStruct.remapPin = DISABLE;

    FL_GPIO_Init( GPIOA, &GPIO_InitStruct );

    defaultInitStruct.clockSrc = FL_RCC_UART0_CLK_SOURCE_APB1CLK;
    defaultInitStruct.baudRate = 115200;
    defaultInitStruct.dataWidth = FL_UART_DATA_WIDTH_8B;
    defaultInitStruct.stopBits = FL_UART_STOP_BIT_WIDTH_1B;
    defaultInitStruct.parity = FL_UART_PARITY_EVEN;
    defaultInitStruct.transferDirection = FL_UART_DIRECTION_TX;

    FL_UART_Init(UART0,&defaultInitStruct );
}
 
/**
  * @brief  UART0 Initialization function
  * @param  void
  * @retval None
  */
void MF_UART0_RX_Init(void)
{
    FL_GPIO_InitTypeDef    GPIO_InitStruct;

    FL_UART_InitTypeDef    RXdefaultInitStruct;

    GPIO_InitStruct.pin = FL_GPIO_PIN_2;
    GPIO_InitStruct.mode = FL_GPIO_MODE_DIGITAL;
    GPIO_InitStruct.outputType = FL_GPIO_OUTPUT_PUSHPULL;
    GPIO_InitStruct.pull = DISABLE;
    GPIO_InitStruct.remapPin = DISABLE;

    FL_GPIO_Init( GPIOA, &GPIO_InitStruct );

    RXdefaultInitStruct.clockSrc = 0;
    RXdefaultInitStruct.baudRate = 115200;
    RXdefaultInitStruct.dataWidth = FL_UART_DATA_WIDTH_8B;
    RXdefaultInitStruct.stopBits = FL_UART_STOP_BIT_WIDTH_1B;
    RXdefaultInitStruct.parity = FL_UART_PARITY_EVEN;
    RXdefaultInitStruct.transferDirection = FL_UART_DIRECTION_RX;

    FL_UART_Init(UART0,&RXdefaultInitStruct );
}

DMA通道1、通道2初始化如下：

/**
  * @brief  DMA_Channel1 Initialization function RX
  * @param  void
  * @retval None
  */
void MF_DMA_Channel1_Init(void)
{
    /*IO CONFIG*/
    FL_DMA_InitTypeDef    RXdefaultInitStruct;

    RXdefaultInitStruct.periphAddress = FL_DMA_PERIPHERAL_FUNCTION1;
    RXdefaultInitStruct.direction = FL_DMA_DIR_PERIPHERAL_TO_RAM;
    RXdefaultInitStruct.memoryAddressIncMode = FL_DMA_MEMORY_INC_MODE_INCREASE;
    RXdefaultInitStruct.flashAddressIncMode = FL_DMA_CH7_FLASH_INC_MODE_INCREASE;
    RXdefaultInitStruct.dataSize = FL_DMA_BANDWIDTH_8B;
    RXdefaultInitStruct.priority = FL_DMA_PRIORITY_HIGH;
    RXdefaultInitStruct.circMode = DISABLE;

    FL_DMA_Init(DMA,&RXdefaultInitStruct,FL_DMA_CHANNEL_1 );
}

void MF_DMA_Channel2_Init(void)
{
    /*IO CONFIG*/
    FL_DMA_InitTypeDef    defaultInitStruct;

    defaultInitStruct.periphAddress = FL_DMA_PERIPHERAL_FUNCTION2;
    defaultInitStruct.direction = FL_DMA_DIR_RAM_TO_PERIPHERAL;
    defaultInitStruct.memoryAddressIncMode = FL_DMA_MEMORY_INC_MODE_INCREASE;
    defaultInitStruct.flashAddressIncMode = FL_DMA_CH7_FLASH_INC_MODE_INCREASE;
    defaultInitStruct.dataSize = FL_DMA_BANDWIDTH_8B;
    defaultInitStruct.priority = FL_DMA_PRIORITY_HIGH;
    defaultInitStruct.circMode = DISABLE;

    FL_DMA_Init(DMA,&defaultInitStruct,FL_DMA_CHANNEL_2 );
}

在MF_Config_Init(void)中调用收发函数：

void MF_Config_Init(void)
{
     /*FUNCTION CALL*/
     MF_DMA_Channel1_Init();
     MF_UART0_RX_Init();
	 /*FUNCTION CALL*/
     MF_UART0_TX_Init();
     MF_DMA_Channel2_Init();
}

在uart0_DMAtrx.c中为编写的测试函数，如下：

#include "main.h"
#include "user_init.h"
#include "uart0_DMAtrx.h"
uint8_t DMARxData[7];
uint8_t DMA_DATA;

void Uart0DMA_Config_TX(uint8_t *buffer,uint32_t length)
{
  FL_DMA_ConfigTypeDef DMA_ConfigStruct={0}; 

  DMA_ConfigStruct.memoryAddress = (uint32_t)buffer;
  DMA_ConfigStruct.transmissionCount = length-1;
  FL_DMA_StartTransmission(DMA, &DMA_ConfigStruct,FL_DMA_CHANNEL_2);
}

void Uart0DMA_Config_RX(uint8_t *buffer,uint32_t length)
{
  FL_DMA_ConfigTypeDef DMA_RX_ConfigStruct={0}; 

  DMA_RX_ConfigStruct.memoryAddress = (uint32_t)buffer;
  DMA_RX_ConfigStruct.transmissionCount = length-1;
  FL_DMA_StartTransmission(DMA, &DMA_RX_ConfigStruct,FL_DMA_CHANNEL_1);
}

void TestDMA_Uart0_TX(void)
{
	uint8_t TestTxData[13] = "TestUart-TX\n";
	volatile uint8_t tmp08;
	    
    FL_DMA_Enable(DMA);
    
	Uart0DMA_Config_TX(TestTxData,13);
     
	FL_UART_EnableTX(UART0);

	while (!FL_DMA_IsActiveFlag_TransferComplete(DMA, FL_DMA_CHANNEL_2));
	FL_DMA_ClearFlag_TransferComplete(DMA, FL_DMA_CHANNEL_2);
	FL_UART_ClearFlag_TXShiftBuffEmpty(UART0);
	
  // 等待发送完成
  while (FL_UART_IsActiveFlag_TXShiftBuffEmpty(UART0) == RESET){};
  FL_UART_ClearFlag_TXShiftBuffEmpty(UART0);	
}

void TestDMA_Uart0_RX(void)
{
    FL_DMA_Enable(DMA); 
    
	Uart0DMA_Config_RX(DMARxData,7);		
				   
    FL_UART_EnableRX(UART0);
	
	if(!FL_DMA_IsActiveFlag_TransferComplete(DMA, FL_DMA_CHANNEL_1)){DMA_DATA = 0;}
	
    while (!FL_DMA_IsActiveFlag_TransferComplete(DMA, FL_DMA_CHANNEL_1));
	
	if(FL_DMA_IsActiveFlag_TransferComplete(DMA, FL_DMA_CHANNEL_1)){DMA_DATA = 1;}

	FL_DMA_ClearFlag_TransferComplete(DMA, FL_DMA_CHANNEL_1);		
}

在主函数while(1)中编写如下：

while(1)
{
	MF_Config_Init();
    TestDMA_Uart0_TX( );
	DelayMs(500);
	if(0 == DMA_DATA){LED1_ON();LED2_OFF();LED3_TOG();LED4_TOG();}
	TestDMA_Uart0_RX( );
	if(1 == DMA_DATA){LED1_OFF();LED2_ON();LED3_TOG();LED4_TOG();DMA_DATA = 0;}
}

DMA发送字符串正常；

 

未加入中断向量，能接受到串口发来的数据，但感觉接收到的数据有点问题，在调试模式下发送数字1234567，在watch中看到的结果如下：

 

不知道为什么DMA收到的数总和串口发来的数据不一致，问题暂未解决，希望大家能予以帮助

源程序见附件

 

w494143467

不错不错，感谢分享，现在UART和dma成标配了！

Jacktang

谢谢分享，确实测试的很好

doudou52098

很有用，感谢分享

luzhouhanhan

感谢分享！