dma 设置方向，长度，中断等

DRV/drv_adc.c

@@ -14,30 +14,6 @@ void DMA1_Channel1_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast
 
 uint32_t adc_raw[4] = {0};
 
-void dma_init(DMA_Channel_TypeDef *Channel, u32 Peripheral, u32 Memory, u16 size)
-{
-    DMA_InitTypeDef DMA_InitStructure = {0};
-
-    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
-
-    DMA_DeInit(Channel);
-    DMA_InitStructure.DMA_PeripheralBaseAddr = Peripheral;
-    DMA_InitStructure.DMA_MemoryBaseAddr = Memory;
-    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
-    DMA_InitStructure.DMA_BufferSize = size;
-    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
-    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
-    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
-    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
-    DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
-    DMA_InitStructure.DMA_Priority = DMA_Priority_Medium;
-    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
-    DMA_Init(Channel, &DMA_InitStructure);
-
-    DMA_Cmd(DMA1_Channel1, ENABLE);
-    DMA_ITConfig(DMA1_Channel1, DMA_IT_TC, ENABLE);
-}
-
 
 void adc_init(void)
 {
@@ -63,15 +39,12 @@ void adc_init(void)
     DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //内存地址增加
     DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word ; //外设数据单位
     DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word ;    //内存数据单位
-    DMA_InitStructure.DMA_Mode = DMA_Mode_Circular  ; //DMA模式：循环传输
+    DMA_InitStructure.DMA_Mode = DMA_Mode_Normal  ; //DMA模式：循环传输
     DMA_InitStructure.DMA_Priority = DMA_Priority_Low ; //优先级：高
     DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;   //禁止内存到内存的传输
 
-    DMA_Init(DMA1_Channel1, &DMA_InitStructure);  //配置DMA1的4通道
+    DMA_Init(DMA1_Channel1, &DMA_InitStructure);  //配置DMA1的1通道
 
-    DMA_ITConfig(DMA1_Channel1, DMA_IT_TC, ENABLE);
-
-    DMA_Cmd(DMA1_Channel1,ENABLE);
 
 
     ADC_DeInit(ADC1);
@@ -101,10 +74,6 @@ void adc_init(void)
     ADC_StartCalibration(ADC1);
     while(ADC_GetCalibrationStatus(ADC1));
 
-
-    //dma_init(DMA1_Channel1, (uint32_t)&ADC1->RDATAR, (uint32_t)adc_raw, sizeof(adc_raw));
-
-
     NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn;
     NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
     NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
@@ -117,12 +86,10 @@ void adc_init(void)
     NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
     NVIC_Init(&NVIC_InitStructure);
 
+    DMA_ITConfig(DMA1_Channel1, DMA_IT_TC, ENABLE);
+    DMA_Cmd(DMA1_Channel1,ENABLE);
 
     ADC_ITConfig( ADC1, ADC_IT_EOC, ENABLE);//使能规则通道中断
-
-
-
-
     ADC_SoftwareStartConvCmd(ADC1, ENABLE);
 }
 
@@ -135,10 +102,10 @@ void ADC1_2_IRQHandler (void)//
    if(ADC_GetITStatus( ADC1, ADC_IT_EOC)!=RESET)
    {
        //中断真的来了就要读取转换值了
-       //printf("adc:interrupt");
-
+       //printf("adc-interrupt");
+       ADC_ClearITPendingBit(ADC1, ADC_IT_EOC);//清除中断
    }
-   ADC_ClearITPendingBit(ADC1, ADC_IT_EOC);//清除中断
+
 }
 
 
@@ -147,17 +114,17 @@ void DMA1_Channel1_IRQHandler(void)
 
     if(DMA_GetFlagStatus(DMA1_IT_TC1))
     {
-        //printf("adc dma:%d,%d,%d,%d  \n", adc_raw[0],adc_raw[1],adc_raw[2],adc_raw[3]);
+        printf("adc dma:%4d,%4d,%4d,%4d  \n", adc_raw[0],adc_raw[1],adc_raw[2],adc_raw[3]);
 
         /* 失能DMA1通道1，以防在中断过程中发生DMA传输 */
         DMA_Cmd(DMA1_Channel1, DISABLE);
         /* 如果DMA设置的是normal模式，需要手动重装计数器 */
-        // DMA1_Channel1->CNDTR = BUFFER_SIZE;
+        DMA1_Channel1->CNTR = sizeof(adc_raw);
         /* 清除中断标志位 */
         DMA_ClearITPendingBit(DMA1_IT_TC1);
         // DMA_ClearFlag(DMA1_FLAG_TC1);
         /* 重新使能DMA1通道1，开始工作 */
-        DMA_ITConfig(DMA1_Channel1, DMA_IT_TC, ENABLE);
+        //DMA_ITConfig(DMA1_Channel1, DMA_IT_TC, ENABLE);
         DMA_Cmd(DMA1_Channel1,ENABLE);
     }
 }

User/main.c

@@ -110,7 +110,7 @@ int main(void)
     {
         Delay_Ms(10);
         //printf("keys:%d,%d,%d,%d\n",keys[0],keys[1],keys[2],keys[3]);
-        printf("adc:\t %4d,%4d,%4d,%4d  \n", adc_raw[0],adc_raw[1],adc_raw[2],adc_raw[3]);
+        //printf("adc:\t %4d,%4d,%4d,%4d  \n", adc_raw[0],adc_raw[1],adc_raw[2],adc_raw[3]);
 
 
         Red_Count += 1;