使用stm32微控制器的一个转换通道对外部电压进行采集，并将采集到的数据进行运算转换后使用串口向pc端发送结果。大神帮忙看程序

Stephanie · 发表于 2016-8-7 15:15:58

void RCC_Config(void);
void GPIO_Config(void);
void USART_Config(void);
void NVIC_Config(void);
void ADC_Config(void);

//void TIM2_Config(void);

int fputc(int ch,FILE *f)
{
  USART_SendData(USART1,(u8)ch);
  while (USART_GetFlagStatus(USART1,USART_FLAG_TC)==RESET);
  return ch;
}

int main(void)

{
u32 ad=0;
u8  i=0;
SystemInit();
RCC_Init();
GPIO_Config();
USART_Config();
NVIC_Config();
ADC_Config();
while(1)
{
      ad=0;
      for(i=0;i<50;i++)
      {
      ADC_SoftwareStartConvCmd(ADC1,ENABLE);
      while(!ADC_GetFlagStatus(ADC1,ADC_FLAG_EOC));
      ad=ad+ADC_GetConversionValue(ADC1);

      }
      ad=ad/50;
      printf("ad=%f\r\n",3.3/4095*ad);

}
}
void RCC_Init()
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
RCC_ADCCLKConfig(RCC_PCLK2_Div6);//12M
}
void GPIO_Config(void)
{
//configure USARTx_Tx as alternate function push-pull//
GPIO_InitTypeDef GPIO_InitStructure;
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);

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

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN ;
GPIO_Init(GPIOC, &GPIO_InitStructure);

}

void ADC_Config(void)
{
  ADC_DeInit(ADC1);
  ADC_InitTypeDef ADC_InitStructure;
  ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;//独立模式
  ADC_InitStructure.ADC_ScanConvMode = ENABLE; //连续多通道模式
  ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;// 连续转换模式
  ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;//不受外界决定
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; //数据右对齐
  ADC_InitStructure.ADC_NbrOfChannel = 1; //扫描通道数1
  ADC_Init(ADC1, &ADC_InitStructure);
  ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 1,ADC_SampleTime_239Cycles5);
  ADC_Cmd(ADC1, ENABLE);
  ADC_ResetCalibration(ADC1);
  while(ADC_GetResetCalibrationStatus(ADC1));
  ADC_StartCalibration(ADC1);
  while(ADC_GetCalibrationStatus(ADC1));
  ADC_SoftwareStartConvCmd(ADC1,ENABLE);

}

void USART_Config (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_ITConfig(USART1, USART_IT_RXNE, ENABLE); //使能串口的接收中断
  USART_Cmd(USART1,ENABLE);
  USART_ClearFlag(USART1,USART_FLAG_TC);//清空发送完成标志，不加这条可能导致第一个发送不出去
  USART_Init(USART1, &USART_InitStructure);

}
void NVIC_Config(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void USART1_IRQHandler(void)
{
if(USART_GetITStatus(USART1,USART_IT_RXNE)!=RESET)//判断串口是否产生接收中断
{
   USART_SendData(USART1,USART_ReceiveData(USART1));

   while (USART_GetFlagStatus (USART1,USART_FLAG_TXE)==RESET);//判断是否发送成
   USART_ClearITPendingBit(USART1,USART_IT_RXNE);//清除中断标志位
}

}

串口窗口出现这些数据，新手不了解是什么意思。