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      EEPW首頁(yè) > 嵌入式系統(tǒng) > 設(shè)計(jì)應(yīng)用 > ADC單通道連續(xù)采樣并用串口發(fā)送電壓值

      ADC單通道連續(xù)采樣并用串口發(fā)送電壓值

      作者: 時(shí)間:2016-11-27 來源:網(wǎng)絡(luò) 收藏
      #include "stm32f10x.h"
      void Delay(unsigned int x);//延時(shí)
      void GPIO_Configuration(void);//IO口配置
      void UART_Init(void); //串口初始化
      void UART2_PutChar(u8 ch); //串口發(fā)送數(shù)據(jù)
      void ADC_Configuration(void); //ADC配置
      void Read_ADC_Result(void); //ADC讀取結(jié)果
      int main(void)
      {
      SystemInit();
      unsigned int t;
      GPIO_Configuration();
      UART_Init();
      ADC_Configuration();
      while(1)
      {Read_ADC_Result();
      for(t=0;t<100;t++)
      {Delay(65530);}
      }
      }
      void GPIO_Configuration(void)
      {
      GPIO_InitTypeDef GPIO_InitStructure;
      RCC_APB1PeriphClockCmd( RCC_APB1Periph_USART2,ENABLE);
      RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
      //GPIO_PinRemapConfig(GPIO_PartialRemap_USART3,ENABLE);
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_Init(GPIOA, &GPIO_InitStructure);
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_Init(GPIOA, &GPIO_InitStructure);
      }
      void UART_Init(void)
      {
      USART_InitTypeDef USART_InitStructure;
      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(USART2, &USART_InitStructure);
      // USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
      // USART_ITConfig(USART2, USART_IT_TXE, ENABLE);
      USART_Cmd(USART2, ENABLE);
      }
      void UART2_PutChar(u8 ch)
      {
      USART_SendData(USART2,ch);
      while(USART_GetFlagStatus(USART2,USART_FLAG_TXE) == RESET);
      }
      void ADC_Configuration(void)
      {
      GPIO_InitTypeDef GPIO_InitStructure; //定義結(jié)構(gòu)體
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC | RCC_APB2Periph_ADC1,ENABLE);//IO口使能設(shè)置
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; //ADC輸入管腳PC0
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;//模擬輸出
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_Init(GPIOC, &GPIO_InitStructure);
      ADC_InitTypeDef ADC_InitStructure;
      ADC_DeInit(ADC1);
      ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;//工作在獨(dú)立模式
      ADC_InitStructure.ADC_ScanConvMode = DISABLE;//工作在單通道模式
      ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;//單次模式
      ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;//轉(zhuǎn)換由軟件而不是外部觸發(fā)啟動(dòng)
      ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;//數(shù)據(jù)右對(duì)齊
      ADC_InitStructure.ADC_NbrOfChannel = 1;//通道數(shù)目
      ADC_Init(ADC1,&ADC_InitStructure);
      ADC_RegularChannelConfig(ADC1,ADC_Channel_10,1,ADC_SampleTime_239Cycles5);//使用ADC1的通道10,采樣順序?yàn)?,采樣周期為239.5周期
      ADC_Cmd(ADC1,ENABLE);//使能ADC1
      ADC_ResetCalibration(ADC1);//重置校準(zhǔn)ADC1寄存器
      while(ADC_GetResetCalibrationStatus(ADC1));//獲取ADC重置校準(zhǔn)寄存器的狀態(tài)
      ADC_StartCalibration(ADC1);//開始ADC1的校準(zhǔn)狀態(tài)
      while(ADC_GetCalibrationStatus(ADC1));//等待校準(zhǔn)完成
      ADC_SoftwareStartConvCmd(ADC1, ENABLE);//使能ADC1的軟件轉(zhuǎn)換啟動(dòng)功能
      }
      void Read_ADC_Result()
      {
      unsigned char i,a,b,c,d;
      unsigned short result;
      for(i=0;i<8;i++)
      {
      ADC_SoftwareStartConvCmd(ADC1, ENABLE);//啟動(dòng)轉(zhuǎn)換
      while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC));//等待轉(zhuǎn)換結(jié)束
      result += ADC_GetConversionValue(ADC1);
      }
      result = result >> 3;
      result = (unsigned int)(((unsigned long)result)*3300>>12);//轉(zhuǎn)換為數(shù)字電壓值
      a = result/1000;
      b = (result-a*1000)/100;
      c = (result-a*1000-b*100)/10;
      d = (result-a*1000-b*100-c*10);
      UART2_PutChar(0x56);//v
      UART2_PutChar(0X3D);//"="
      UART2_PutChar(a+48);
      UART2_PutChar(0x2e);//"."
      UART2_PutChar(b+48);
      UART2_PutChar(c+48);
      UART2_PutChar(d+48);
      UART2_PutChar(0x20);//"_"空格
      }
      void Delay(unsigned int x)
      {
      unsigned int t;
      t=x;
      while(t--);
      }


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