通过AD采集信号然后串口显示控制led灯亮灭

MXA2455656968 · 发表于 2019-12-24 12:05:07

本帖最后由 MXA2455656968 于 2019-12-24 12:09 编辑

通过AD采集信号然后串口显示出来电压值（已经实现），现在想要加一个功能就是当采集的AD值大于某个数值时led亮，小于就灭。下面是已经实现部分代码串口显示，led部分自己加了代码没现象，小白一个恳请各位为大佬指点。qq2455656968

#include"stm32f10x.h"
#include"stdio.h"
#define ADC1_DR_Address ((uint32_t)0x40012400+0x4C)
__IO uint16_t ADCConvertedValue;
__IO uint32_t DMA_ADC_OK;

void NVIC_Config(void);
void USART_Config(void);
void GPIO_Config(void);
void ADC_Config(void);
void DMA_ADC_Config(void);
void delay(int);

int fputc(int ch,FILE *f)
{
      USART_SendData(USART1,(u8)ch);
      while(!(USART_GetFlagStatus(USART1,USART_FLAG_TXE)==SET));
            return ch;
}

int main(void)
{

  float voltage;
  NVIC_Config();
  USART_Config();
  DMA_ADC_Config();
  ADC_Config();
      delay(100);

      printf("\n---ADC Voltage Acquisition---\n");
      printf("\n---Complete Initialization---\n");

      while(1)
      {

      if(DMA_ADC_OK)
      {
            DMA_ADC_OK=0;
            delay(1000);
            voltage=(float)ADCConvertedValue*(3.3/4096);
            printf("---MQ2---\r\n");
            printf("AD Value:0x%04x\r\n",ADCConvertedValue);
            printf("Voltage:%.4f V\r\n",voltage);

      }
      (这个代码led不亮)
   //  if(ADC_GetConversionValue(ADC1)>=2500)
   //          {delay(10);
   //                         GPIO_ResetBits(GPIOA, GPIO_Pin_8);
   //                         delay(1000);
//                   GPIO_SetBits(GPIOA, GPIO_Pin_8);
   //       }
//          GPIO_SetBits(GPIOA, GPIO_Pin_8);
   //       delay(10);

   }
}

void NVIC_Config(void)
{
      NVIC_InitTypeDef NVIC_InitStructure;
      NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
      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 USART_Config(void)
{
      USART_InitTypeDef USART_InitStructure;
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
                     GPIO_Config();
      USART_InitStructure.USART_BaudRate=9600;
      USART_InitStructure.USART_WordLength=USART_WordLength_8b;
      USART_InitStructure.USART_StopBits=USART_StopBits_1;
      USART_InitStructure.USART_Parity=USART_Parity_No;
      USART_InitStructure.USART_HardwareFlowControl=USART_HardwareFlowControl_None;
      USART_InitStructure.USART_Mode=USART_Mode_Rx|USART_Mode_Tx;
      USART_Init(USART1,&USART_InitStructure);
      USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);
      USART_Cmd(USART1,ENABLE);
}
void GPIO_Config(void)
{
      GPIO_InitTypeDef GPIO_InitStructure;
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO|RCC_APB2Periph_USART1,ENABLE);
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
      GPIO_Init(GPIOA,&GPIO_InitStructure);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD,ENABLE);
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
      GPIO_Init(GPIOD,&GPIO_InitStructure);

      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
      GPIO_Init(GPIOA,&GPIO_InitStructure);
}

void ADC_Config(void)
{
      GPIO_InitTypeDef GPIO_InitStructure;
      ADC_InitTypeDef ADC_InitStructure;
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_ADC1,ENABLE);
      RCC_ADCCLKConfig(RCC_PCLK2_Div6);
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
      GPIO_Init(GPIOC,&GPIO_InitStructure);
      ADC_InitStructure.ADC_Mode=ADC_Mode_Independent;
      ADC_InitStructure.ADC_ScanConvMode=ENABLE;
      ADC_InitStructure.ADC_ContinuousConvMode=ENABLE;
      ADC_InitStructure.ADC_ExternalTrigConv=ADC_ExternalTrigConv_None;
      ADC_InitStructure.ADC_DataAlign=ADC_DataAlign_Right;
      ADC_InitStructure.ADC_NbrOfChannel=1;
      ADC_Init(ADC1,&ADC_InitStructure);
      ADC_RegularChannelConfig(ADC1,ADC_Channel_14,1,ADC_SampleTime_55Cycles5);
      ADC_DMACmd(ADC1,ENABLE);
      ADC_Cmd(ADC1,ENABLE);
      ADC_ResetCalibration(ADC1);
      while(ADC_GetResetCalibrationStatus(ADC1));
      ADC_StartCalibration(ADC1);
      while(ADC_GetCalibrationStatus(ADC1));
      ADC_SoftwareStartConvCmd(ADC1,ENABLE);
}

void DMA_ADC_Config(void)
{
      DMA_InitTypeDef DMA;
      RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);
      DMA.DMA_PeripheralBaseAddr=ADC1_DR_Address;
      DMA.DMA_MemoryBaseAddr=(uint32_t)&ADCConvertedValue;
      DMA.DMA_DIR=DMA_DIR_PeripheralSRC;
      DMA.DMA_BufferSize=1;
      DMA.DMA_PeripheralInc=DMA_PeripheralInc_Disable;
      DMA.DMA_MemoryInc=DMA_MemoryInc_Disable;
      DMA.DMA_PeripheralDataSize=DMA_PeripheralDataSize_HalfWord;
      DMA.DMA_MemoryDataSize=DMA_MemoryDataSize_HalfWord;
      DMA.DMA_Mode=DMA_Mode_Circular;
      DMA.DMA_Priority=DMA_Priority_High;
      DMA.DMA_M2M=DMA_M2M_Disable;
      DMA_Init(DMA1_Channel1,&DMA);
      DMA_ITConfig(DMA1_Channel1,DMA_IT_TC,ENABLE);
      DMA_Cmd(DMA1_Channel1,ENABLE);
}
void delay(int32_t ms)
{
      int32_t i;
      while(ms--)
      {
            i=7500;
            while(i--);
      }
}
void DMA1_Channel1_IRQHandler(void)
{
      if(DMA_GetITStatus(DMA1_IT_TC1))
      {
            DMA_ADC_OK=1;
            DMA_ClearITPendingBit(DMA1_IT_GL1);
      }
}