STM32F3发现板ADC DMA传输不工作

STM32F3发现板ADC DMA传输不工作,stm32,dma,adc,stm32ldiscovery,Stm32,Dma,Adc,Stm32ldiscovery,我正在使用STM32F303(发现板),试图从外部触发一个来自定时器信号TRGO2的ADC转换,并通过DMA将其存储到一个缓冲区。但是,似乎没有任何内容写入该缓冲区。请有人检查一下我的初始化代码,让我知道我在初始化过程中是否弄错了什么?我知道定时器触发工作,因为我能够在启用ADC中断时读取ADC值 void InitADC(void) { int i; ADC_InitTypeDef ADC_InitStructure; ADC_CommonInitTy

我正在使用STM32F303(发现板),试图从外部触发一个来自定时器信号TRGO2的ADC转换,并通过DMA将其存储到一个缓冲区。但是,似乎没有任何内容写入该缓冲区。请有人检查一下我的初始化代码,让我知道我在初始化过程中是否弄错了什么?我知道定时器触发工作,因为我能够在启用ADC中断时读取ADC值

void InitADC(void)
{
     int i;
     ADC_InitTypeDef       ADC_InitStructure;
     ADC_CommonInitTypeDef ADC_CommonInitStructure;
     GPIO_InitTypeDef    GPIO_InitStructure;
     NVIC_InitTypeDef    NVIC_InitStructure;
     DMA_InitTypeDef         DMA_InitStructure;


     RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

     DMA_DeInit(DMA1_Channel1);

     DMA_InitStructure.DMA_BufferSize = 2;
     DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
     DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
     DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)adcBuffer;
     DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
     DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
     DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
     DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&ADC2->DR;
     DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
     DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
     DMA_InitStructure.DMA_Priority = DMA_Priority_High;
     DMA_Init(DMA1_Channel1, &DMA_InitStructure);

     DMA_Cmd(DMA1_Channel1, ENABLE);

     /* Configure the ADC clock */
     RCC_ADCCLKConfig(RCC_ADC12PLLCLK_Div2);

     /* Enable ADC12 clock */
     RCC_AHBPeriphClockCmd(RCC_AHBPeriph_ADC12, ENABLE);

     ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
     ADC_CommonInitStructure.ADC_Clock = ADC_Clock_SynClkModeDiv1;
     ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_1;
     ADC_CommonInitStructure.ADC_DMAMode = ADC_DMAMode_OneShot;
     ADC_CommonInitStructure.ADC_TwoSamplingDelay = 0;

     ADC_CommonInit(ADC2, &ADC_CommonInitStructure);

     /* GPIOA Periph clock enable */
     RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);

     /* Configure ADC2 Channel1 as analog input */
     GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5;
     GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
     GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
     GPIO_Init(GPIOA, &GPIO_InitStructure);

     ADC_StructInit(&ADC_InitStructure);

     /* Calibration procedure */
     ADC_VoltageRegulatorCmd(ADC2, ENABLE);
     for(i = 0; i < 1000; i++) {}

     ADC_SelectCalibrationMode(ADC2, ADC_CalibrationMode_Single);
     ADC_StartCalibration(ADC2);

     while(ADC_GetCalibrationStatus(ADC2) != RESET );

     ADC_InitStructure.ADC_ContinuousConvMode = ADC_ContinuousConvMode_Disable;
     ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
     ADC_InitStructure.ADC_ExternalTrigConvEvent = ADC_ExternalTrigConvEvent_10;
     ADC_InitStructure.ADC_ExternalTrigEventEdge = ADC_ExternalTrigEventEdge_RisingEdge;
     ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
     ADC_InitStructure.ADC_OverrunMode = ADC_OverrunMode_Disable;
     ADC_InitStructure.ADC_AutoInjMode = ADC_AutoInjec_Disable;
     ADC_InitStructure.ADC_NbrOfRegChannel = 2;
     ADC_Init(ADC2, &ADC_InitStructure);

     /* ADC2 regular channel1 configuration */
     ADC_RegularChannelConfig(ADC2, ADC_Channel_1, 1, ADC_SampleTime_7Cycles5);
     ADC_RegularChannelConfig(ADC2, ADC_Channel_2, 2, ADC_SampleTime_7Cycles5);

     /* Configure and enable DMA interrupt */
     NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn;
     NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
     NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
     NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
     NVIC_Init(&NVIC_InitStructure);

     /* Enable interrupt */
     7DMA_ITConfig(DMA1_Channel1, DMA1_IT_TC1, ENABLE);

     /* Configures the ADC DMA */
     ADC_DMAConfig(ADC2, ADC_DMAMode_Circular);
     /* Enable the ADC DMA */
     ADC_DMACmd(ADC2, ENABLE);

     /* Enable ADC2 */
     ADC_Cmd(ADC2, ENABLE);
     ADC_DMACmd(ADC2, ENABLE);

     /* wait for ADRDY */
     while(!ADC_GetFlagStatus(ADC2, ADC_FLAG_RDY));

     /* Start ADC2 Software Conversion */
     ADC_StartConversion(ADC2);
}

void DMA1_Channel1_IRQHandler(void)
{
     if (DMA_GetFlagStatus(DMA1_FLAG_TC1) != RESET)
     {
         DMA_ClearITPendingBit(DMA1_FLAG_TC1);
         adcBuffer[0] = (adcBuffer[0] * ADC_VREF) >> 12;
         adcBuffer[1] = (adcBuffer[1] * ADC_VREF) >> 12;
     } 
}
void InitADC(void)
{
int i;
ADC_InitTypeDef ADC_InitStructure;
ADC_CommonInitTypeDef ADC_CommonInitTypeDef结构;
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,启用);
DMA_脱硝剂(DMA1_通道1);
DMA_InitStructure.DMA_BufferSize=2;
DMA_InitStructure.DMA_DIR=DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_M2M=DMA_M2M_Disable;
DMA_InitStructure.DMA_MemoryBaseAddr=(uint32_t)adcBuffer;
DMA_InitStructure.DMA_MemoryDataSize=DMA_MemoryDataSize_半字;
DMA_InitStructure.DMA_MemoryInc=DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_Mode=DMA_Mode_循环;
DMA_InitStructure.DMA_peripheraldbaseaddr=(uint32_t)&ADC2->DR;
DMA_InitStructure.DMA_PeripheralDataSize=DMA_PeripheralDataSize\u半字;
DMA_InitStructure.DMA_PeripheralInc=DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_Priority=DMA_Priority_High;
DMA_Init(DMA1_信道1和DMA_Init结构);
DMA_Cmd(DMA1_信道1,启用);
/*配置ADC时钟*/
RCC_ADCCLKConfig(RCC_adc12plclk_Div2);
/*启用ADC12时钟*/
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_ADC12,启用);
ADC_CommonInitStructure.ADC_Mode=ADC_Mode_独立;
ADC_CommonInitStructure.ADC_Clock=ADC_Clock_SynClkModeDiv1;
ADC_CommonInitStructure.ADC_DMAAccessMode=ADC_DMAAccessMode_1;
ADC_CommonInitStructure.ADC_DMAMode=ADC_DMAMode_OneShot;
ADC_CommonInitStructure.ADC_TwoSamplingDelay=0;
ADC_CommonInit(ADC2和ADC_CommonInit结构);
/*GPIOA外围时钟启用*/
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA,启用);
/*将ADC2信道1配置为模拟输入*/
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_4 | GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode\u AN;
GPIO_InitStructure.GPIO_PuPd=GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA和GPIO_InitStructure);
ADC_init(&ADC_init structure);
/*校准程序*/
ADC_电压调节器CMD(ADC2,启用);
对于(i=0;i<1000;i++){}
ADC_选择校准模式(ADC2、ADC_校准模式_单);
ADC_开始校准(ADC2);
同时(ADC_GetCalibrationStatus(ADC2)!=复位);
ADC_InitStructure.ADC_ContinuousConvMode=ADC_ContinuousConvMode\u Disable;
ADC_InitStructure.ADC_Resolution=ADC_Resolution_12b;
ADC_InitStructure.ADC_externaltrigconvent=ADC_externaltrigconvent_10;
ADC_InitStructure.ADC_ExternalTrigEventEdge=ADC_ExternalTrigEventEdge_RisingEdge;
ADC_InitStructure.ADC_DataAlign=ADC_DataAlign_Right;
ADC_InitStructure.ADC_overflowmode=ADC_overflowmode_Disable;
ADC_InitStructure.ADC_AutoInjMode=ADC_AutoInjec_Disable;
ADC_InitStructure.ADC_NbrOfRegChannel=2;
ADC_Init(ADC2和ADC_Init结构);
/*ADC2常规信道1配置*/
ADC_RegularChannelConfig(ADC2、ADC_通道1、1、ADC_采样时间7周期5);
ADC_RegularChannelConfig(ADC2、ADC_通道2、2、ADC_采样时间7周期5);
/*配置并启用DMA中断*/
NVIC_InitStructure.NVIC_IRQChannel=DMA1_Channel1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelSubPriority=0;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;
NVIC_InitStructure.NVIC_IRQChannelCmd=启用;
NVIC_Init(&NVIC_InitStructure);
/*启用中断*/
7DMA_ITConfig(DMA1_信道1,DMA1_IT_TC1,启用);
/*配置ADC DMA*/
ADC_DMAConfig(ADC2,ADC_dmanode_圆形);
/*启用ADC DMA*/
ADC_DMACmd(ADC2,启用);
/*启用ADC2*/
ADC_Cmd(ADC2,启用);
ADC_DMACmd(ADC2,启用);
/*等阿德*/
而(!ADC_GetFlagStatus(ADC2,ADC_FLAG_RDY));
/*启动ADC2软件转换*/
ADC_标准转换(ADC2);
}
无效DMA1\U通道1\U IRQHandler(无效)
{
如果(DMA_GetFlagStatus(DMA1_FLAG_TC1)!=重置)
{
DMA_ClearITPendingBit(DMA1_标志_TC1);
adcBuffer[0]=(adcBuffer[0]*ADC_VREF)>>12;
adcBuffer[1]=(adcBuffer[1]*ADC_VREF)>>12;
} 
}
以下是相关的ADC和DMA寄存器内容:

ADC2 CR:0x10000005

ADC2 CFGR:0x00000683

DMA1_CH1 CCR:0x000025A3

DMA1\U CH1 CNDTR:0x00000002

DMA1_CH1 CPAR:0x50000140


DMA1_CH1 CMAR:0x200001C

我似乎已经解决了这个问题。进一步查看数据表,我发现ADC2未连接到DMA1通道1:

与ADC2的正确DMA连接是DMA2通道1: