STM32f407单片机半传输中断,问题求助

ID:285416 · 发表于 2023-3-26 20:24

#include "main.h"
  u8 DmaBuffere[2][RHEOSTAT_NOFCHANEL]={0};
extern u8 flag[2],Bufbj;

void My_DMA_Init(void)
{
      NVIC_InitTypeDef NVIC_InitStructure;
  DMA_InitTypeDef    DMA_InitStructure;

/* Enable ADC3, DMA and GPIO clocks ****************************************/
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
      NVIC_InitStructure.NVIC_IRQChannel= DMA2_Stream0_IRQn;//TIM2_IRQn;  //
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
      NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
      NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
      NVIC_Init(&NVIC_InitStructure);
/* DMA2 Stream0 channel2 configuration **************************************/
  DMA_InitStructure.DMA_Channel = DMA_Channel_0;
  DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)RHEOSTAT_ADC1_DR_ADDR;
  DMA_InitStructure.DMA_Memory0BaseAddr = (u32)DmaBuffere[0];//数组名表示首地址
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
  DMA_InitStructure.DMA_BufferSize = RHEOSTAT_NOFCHANEL*2;
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
  DMA_InitStructure.DMA_MemoryDataSize = DMA_PeripheralDataSize_Byte;
  DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
  DMA_InitStructure.DMA_Priority = DMA_Priority_High;
  DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
  DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
  DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
  DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
  DMA_Init(DMA2_Stream0, &DMA_InitStructure);
  DMA_ClearITPendingBit(DMA2_Stream0,DMA_IT_TCIF0);//DMA_IT_HTIF0
      DMA_ClearITPendingBit(DMA2_Stream0,DMA_IT_HTIF0);
DMA_ITConfig(DMA2_Stream0,DMA_IT_TC, ENABLE);
  DMA_ITConfig(DMA2_Stream0, DMA_IT_HT, ENABLE);
      DMA_Cmd(DMA2_Stream0, ENABLE);

}
//DMA_PeripheralDataSize_HalfWord++DMA_PeripheralDataSize_Byte
void DMA2_Stream0_IRQHandler(void)       // 使用DMA中断采集数据，不会容易丢失数据
{
if (DMA2->LISR&0x20)
{
                     DMA2->LIFCR|=0x20;
                     flag[0]=1;
                     }

               if (DMA2->HISR&0x10)
{
                     DMA2->HIFCR|=0x10;
                              flag[1]=1;
  }
}

哪里不对了，半进不了

ID:405850 · 发表于 2023-3-27 08:54

ADC + DMA不用配置中断优先级吧？ DataSize也没见设置呢？还有adc的配置呢

ID:285416 · 发表于 2023-3-27 16:52

DataSize 是指什么没明白 adc配置不用看了呢全断是对的

ID:285416 · 发表于 2023-3-27 16:55

半断就不对断不了 debug调寄存一直0

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