请求各位大佬给帮忙看看我这个dma串口收发数据

只看该作者 · 2020-6-21 13:01

进不了串口中断，急求

#include "usart.h"
#include "dma.h"
#include "sys.h"
#define UART_RX_LEN 128
u8 ccc=0;
u8 Res;
void uart_init(u32 bound){
  //GPIO¶Ë¿ÚÉèÖÃ
  GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE); //Ê¹ÄÜUSART1£¬GPIOAÊ±ÖÓ

//USART1_TX GPIOA.9
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //PA.9
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //¸´ÓÃÍÆÍìÊä³ö
  GPIO_Init(GPIOA, &GPIO_InitStructure);//³õÊ¼»¯GPIOA.9

  //USART1_RX    GPIOA.10³õÊ¼»¯
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;//PA10
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//¸¡¿ÕÊäÈë
  GPIO_Init(GPIOA, &GPIO_InitStructure);//³õÊ¼»¯GPIOA.10

  //Usart1 NVIC ÅäÖÃ
  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2;//ÇÀÕ¼ÓÅÏÈ¼¶3
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; //×ÓÓÅÏÈ¼¶3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQÍ¨µÀÊ¹ÄÜ
NVIC_Init(&NVIC_InitStructure); //¸ù¾ÝÖ¸¶¨µÄ²ÎÊý³õÊ¼»¯VIC¼Ä´æÆ÷

//USART ³õÊ¼»¯ÉèÖÃ

USART_InitStructure.USART_BaudRate = bound;//´®¿Ú²¨ÌØÂÊ
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//×Ö³¤Îª8Î»Êý¾Ý¸ñÊ½
USART_InitStructure.USART_StopBits = USART_StopBits_1;//Ò»¸öÍ£Ö¹Î»
USART_InitStructure.USART_Parity = USART_Parity_No;//ÎÞÆæÅ¼Ð£ÑéÎ»
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//ÎÞÓ²¼þÊý¾ÝÁ÷¿ØÖÆ
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //ÊÕ·¢Ä£Ê½

  USART_Init(USART1, &USART_InitStructure); //³õÊ¼»¯´®¿Ú1
//  USART_ITConfig(USART1, USART_IT_RXNE, DISABLE);//¿ªÆô´®¿Ú½ÓÊÜÖÐ¶Ï
USART_ITConfig(USART1, USART_IT_IDLE, ENABLE);
  USART_Cmd(USART1, ENABLE);
//Ê¹ÄÜ´®¿Ú1

}

void USART1_IRQHandler(void)             //´®¿Ú1ÖÐ¶Ï·þÎñ³ÌÐò
{
ccc=25;

   if (USART_GetFlagStatus(USART1, USART_FLAG_ORE) != RESET)//??!????if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)???
{
      USART_ReceiveData(USART1);
}
if(USART_GetITStatus(USART1, USART_IT_IDLE) != RESET)  //½ÓÊÕÖÐ¶Ï(½ÓÊÕµ½µÄÊý¾Ý±ØÐëÊÇ0x0d 0x0a½áÎ²)
{
   USART1->SR;
USART1->DR;
ccc=2;
Receive_DataPack();
USART_ReceiveData(USART1);
}
// if(USART_GetITStatus(USART1,USART_IT_RXNE)!=RESET)
// {
//
//
// Receive_DataPack();
// }
}
void Receive_DataPack(void)
{

uint32_t buff_length;

DMA_Cmd(DMA1_Channel5, DISABLE);

DMA_ClearFlag( DMA1_FLAG_TC5 );

buff_length = UART_RX_LEN    - DMA_GetCurrDataCounter(DMA1_Channel5);
ccc=1;
DMA_SetCurrDataCounter(DMA1_Channel5,UART_RX_LEN);

DMA_Cmd(DMA1_Channel5, ENABLE);

}

请求各位大佬给帮忙看看我这个dma串口收发数据

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