F407 定时器触发ADC采集，然后DMA传送至八位数组失败

李志猛 · 发表于 2017-4-26 20:14:03

代码如下
void BSP_gpioinit(void)
{
GPIO_InitTypeDef                GPIO_InitStructure;

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);

//ADC3  Channel_10             PC0
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_Speed  = GPIO_Fast_Speed;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOC, &GPIO_InitStructure);

//TIM3  Channel_1             PA6
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed  = GPIO_Medium_Speed;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource6,GPIO_AF_TIM3);
}

void BSP_timerinit(void)
{
TIM_TimeBaseInitTypeDef       TIM_TimeBaseStructure;
  TIM_OCInitTypeDef             TIM_OCInitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
TIM_TimeBaseStructure.TIM_Prescaler=84;
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period=1000;
TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_TimeBaseInit(TIM3,&TIM_TimeBaseStructure);

TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE);

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM_OCInitStructure.TIM_Pulse=500;
TIM_OC1Init(TIM3, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);

TIM_ARRPreloadConfig(TIM3,ENABLE);
TIM_Cmd(TIM3, ENABLE);

}

void BSP_adcinit(void)
{
ADC_InitTypeDef                ADC_InitStructure;
ADC_CommonInitTypeDef          ADC_CommonInitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC3, ENABLE);

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;
ADC_CommonInit(&ADC_CommonInitStructure);

ADC_InitStructure.ADC_Resolution          = ADC_Resolution_12b;
ADC_InitStructure.ADC_ScanConvMode          = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode    = DISABLE;
ADC_InitStructure.ADC_ExternalTrigConv    = ADC_ExternalTrigConv_T3_TRGO;
ADC_InitStructure.ADC_DataAlign             = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfConversion       = 1;
ADC_Init(ADC3, &ADC_InitStructure);

ADC_RegularChannelConfig(ADC3, ADC_Channel_10, 1, ADC_SampleTime_3Cycles);
ADC_DMARequestAfterLastTransferCmd(ADC3, ENABLE);
ADC_DMACmd(ADC3, ENABLE);
ADC_Cmd(ADC3, ENABLE);
}

void BSP_dmainit(void)
{
DMA_InitTypeDef          DMA_InitStructure;

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2,ENABLE);
DMA_DeInit(DMA2_Stream0);

  DMA_InitStructure.DMA_Channel = DMA_Channel_2;
  DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&ADC3->DR;
  DMA_InitStructure.DMA_Memory0BaseAddr = (u32)Collect_800_Times_Array;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
  DMA_InitStructure.DMA_BufferSize = 8;
  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_MemoryDataSize_Byte;
  DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
  DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
  DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
  DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
  DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
  DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
  DMA_Init(DMA2_Stream0, &DMA_InitStructure);

DMA_ITConfig(DMA2_Stream0,DMA_IT_TC,ENABLE);
DMA_Cmd(DMA2_Stream0,ENABLE);

}

void BSP_nvicinit(void)
{
NVIC_InitTypeDef          NVIC_InitStructure;

  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

NVIC_InitStructure.NVIC_IRQChannel=TIM3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority=1;
NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel=DMA2_Stream0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority=1;
NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
NVIC_Init(&NVIC_InitStructure);
}

中断如下
uint16_t Test_Number_TIM3 = 0;
void DMA2_Stream0_IRQHandler(void)
{
if(DMA_GetFlagStatus(DMA2_Stream0,DMA_FLAG_TCIF0)!=RESET)
{
DMA_ClearFlag(DMA2_Stream0,DMA_FLAG_TCIF0);
}
}

void TIM3_IRQHandler(void)
{
if(TIM_GetFlagStatus(TIM3,TIM_FLAG_Update)!=RESET)
{
Test_Number_TIM3++;
TIM_ClearFlag(TIM3,TIM_FLAG_Update);
}
}