STM32F3发现板ADC DMA传输不工作
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
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: