ADC+DMA程序始终进不了DMA2_Stream1_IRQHandler,也不知道哪里出错了,还请大神指点啊!
这个是初始化设置
GPIO_InitTypeDef GPIO_InitStructure;
ADC_CommonInitTypeDef ADC_CommonInitStructure;
ADC_InitTypeDef ADC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
// dma2 stream1 reset
DMA_DeInit(DMA2_Stream1);
//wait dma2 configure enable
while (DMA_GetCmdStatus(DMA2_Stream1) != DISABLE){;}
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
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;
//adc3
DMA_InitStructure.DMA_Channel = DMA_Channel_2;
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&ADC3->DR;;
DMA_InitStructure.DMA_Memory0BaseAddr = (u32)&adc3_result_original;
DMA_InitStructure.DMA_BufferSize = cbAdcMaxNum;
DMA_Init(DMA2_Stream1, &DMA_InitStructure);
DMA_Cmd(DMA2_Stream1, ENABLE);
//adc3
NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
//adc3
DMA_ITConfig(DMA2_Stream1, DMA_IT_TC, ENABLE);
// enable adc1,adc2,adc3, dma2 and gpio clocks
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2|RCC_AHB1Periph_GPIOA|RCC_AHB1Periph_GPIOB|RCC_AHB1Periph_GPIOC, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1| RCC_APB2Periph_ADC2|RCC_APB2Periph_ADC3, ENABLE);
// configure ADC1 Channel3,4,5,6 pin as analog input
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// configure ADC1 Channel0,1 pin as analog input
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOB, &GPIO_InitStructure);
// configure ADC3 Channel0 pin as analog input
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOC, &GPIO_InitStructure);
// reset adc1
RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC1,ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC1,DISABLE);
// reset adc3
RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC3,ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC3,DISABLE);
// adc common initialize
ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;
ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div4;//ADCCLK=PCLK2/4=84/4=21Mhz
ADC_CommonInit(&ADC_CommonInitStructure);
// adc3 initianlize
ADC_InitStructure.ADC_ScanConvMode = ENABLE;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_NbrOfConversion = 1;
ADC_Init(ADC3, &ADC_InitStructure);
// adc3 regular configuration
ADC_RegularChannelConfig(ADC3, ADC_Channel_10, 1, ADC_SampleTime_56Cycles);
// enable dma request after last transfer (multi-adc mode)
//ADC_MultiModeDMARequestAfterLastTransferCmd(ENABLE);
ADC_Cmd(ADC3, ENABLE);
//ADC_ITConfig(ADC3,ADC_IT_EOC,ENABLE);
DMA中断程序
void DMA2_Stream1_IRQHandler(void)
{
u8 bIndex,bTemp;
u16 sAdcValue;
u32 wAdcSumTemp=cwParaReset;
if(DMA_GetFlagStatus(DMA2_Stream1,DMA_IT_TCIF1))
{
//ADC_SoftwareStartConvCmd(ADC3, DISABLE);
DMA_ClearFlag(DMA2_Stream1,DMA_IT_TCIF1);
}
}
主程序
vWdtReload();
vTimDlyMs(100);
//disable dma2
DMA_Cmd(DMA2_Stream1, DISABLE);
//make sure dma can be setting
while (DMA_GetCmdStatus(DMA2_Stream1) != DISABLE){;}
//set dma counter
DMA_SetCurrDataCounter(DMA2_Stream1, cbAdcMaxNum);
//enable dma2
DMA_Cmd(DMA2_Stream1, ENABLE);
// //start dma2 interrupt
// DMA_ITConfig(DMA2_Stream1, DMA_IT_TC, ENABLE);
ADC_SoftwareStartConv(ADC3); //ʹÄÜÖ¸¶¨µÄADC1µÄÈí¼þת»»Æô¶¯¹¦ÄÜ
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原子哥,你发的例子程序我有,我目前想要使用的是单次ADC触发DMA的中断,发现除了第一次能够触发成功后面的好像都不行,当然我贴出来的帖子里面也少了一个东西,那就是
ADC_DMACmd(ADC1, ENABLE);
ADC_DMACmd(ADC3, ENABLE);
这个问题没有解决啊!
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