大佬帮看一下程序哪错了，这个是用来测50Hz的交流电压，一个周期采64个点，现在程序0错误0警告

19980727 · 发表于 2022-5-3 11:01:10

下载到战舰版上试测一下板子上的直流，显示0000.0000V，测不出来

void  Adc_Init(void)
{
ADC_InitTypeDef ADC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA |RCC_APB2Periph_ADC1,ENABLE);

RCC_ADCCLKConfig(RCC_PCLK2_Div6);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOA, &GPIO_InitStructure);

ADC_DeInit(ADC1);

ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T3_CC1;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 1;
ADC_Init(ADC1, &ADC_InitStructure);

ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_239Cycles5 );

ADC_Cmd(ADC1, ENABLE);
ADC_DMACmd(ADC1, ENABLE);

ADC_ResetCalibration(ADC1);
while(ADC_GetResetCalibrationStatus(ADC1));
ADC_StartCalibration(ADC1);
while(ADC_GetCalibrationStatus(ADC1));

}

extern u16 value;
extern u16 sum;
extern u16 j;

void MYDMA_Config(DMA_Channel_TypeDef* DMA_CHx,u32 cpar,u32 cmar,u16 cndtr)
{
  DMA_InitTypeDef DMA_InitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
      DMA_DeInit(DMA_CHx);

DMA_InitStructure.DMA_PeripheralBaseAddr = cpar;
DMA_InitStructure.DMA_MemoryBaseAddr = cmar;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = cndtr;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA_CHx, &DMA_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn;
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
      NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
      NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
      NVIC_Init(&NVIC_InitStructure);

}

void DMA1_Channel1_IRQHander(void)
{
if(DMA_GetITStatus(DMA1_IT_TC1)!=RESET)
{
                     sum+=value;
j++;
      }

}

void TIM3_PWM_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);

TIM_TimeBaseStructure.TIM_Period = arr;
TIM_TimeBaseStructure.TIM_Prescaler =psc;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

TIM3 Channel2 PWMÄ￡ê½
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_Pulse=1562.5;
TIM_OC1Init(TIM3, &TIM_OCInitStructure);

TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);

TIM_Cmd(TIM3, ENABLE);

u16 value;
float aftervalue;
u16 avalue;
u16 sum=0;
u16 j=0;

int main(void)
{

      NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
delay_init();
uart_init(115200);
LED_Init();
LCD_Init();
Adc_Init();

POINT_COLOR=BLUE;

LCD_ShowString(60,168,200,16,16,"CH0_V: 0000.0000 V");

TIM3_PWM_Init(3124,6.2);
MYDMA_Config(DMA1_Channel1,(u32)&ADC1->DR,(u32)&value,1);
ADC_ExternalTrigConvCmd(ADC1, ENABLE);
DMA_Cmd(DMA1_Channel1, ENABLE);

  while(1)
{

if(j==64)
{
aftervalue=(float)sum/j;
avalue= aftervalue*(3.3/4096);
aftervalue=avalue;

         POINT_COLOR=BLUE;
         LCD_ShowxNum(116,166, aftervalue,4,16,0);

                     avalue-=aftervalue;
   avalue*=10000;

LCD_ShowxNum(156,166,avalue,4,16,0X80);

LED0=!LED0;
delay_ms(200);

j=0;
}

}

}