ＡＤＣ采样过程中功耗是稳定的吗？我现在直接运行ＡＤ采样，发现功耗在不断跳变，从2.7ma-3.2ma之间变化，是什么原因？

aiyy · 发表于 2016-7-15 11:35:50

void Adc_Init()
{// ADC_DeInit(ADC1);
  GPIO_Init(GPIOD,GPIO_Pin_0 ,GPIO_Mode_In_FL_No_IT);
  CLK_SYSCLKSourceSwitchCmd(ENABLE);
  CLK_SYSCLKSourceConfig(CLK_SYSCLKSource_HSI);
  CLK_SYSCLKDivConfig(CLK_SYSCLKDiv_4);
  while (CLK_GetFlagStatus(CLK_FLAG_HSIRDY) == RESET);
  CLK_PeripheralClockConfig(CLK_Peripheral_ADC1,ENABLE);

  ADC_Init(ADC1,ADC_ConversionMode_Single,ADC_Resolution_12Bit,ADC_Prescaler_2);
  ADC_SamplingTimeConfig(ADC1,ADC_Group_SlowChannels,ADC_SamplingTime_384Cycles);

  ADC_ChannelCmd(ADC1,ADC_Channel_00To07,DISABLE);
  ADC_ChannelCmd(ADC1,ADC_Channel_08To15,DISABLE);
  ADC_ChannelCmd(ADC1,ADC_Channel_24To27,DISABLE);
  ADC_ChannelCmd(ADC1,ADC_Channel_16,DISABLE);
  ADC_ChannelCmd(ADC1,ADC_Channel_17,DISABLE);
  ADC_ChannelCmd(ADC1,ADC_Channel_18,DISABLE);
  ADC_ChannelCmd(ADC1,ADC_Channel_19,DISABLE);
  ADC_ChannelCmd(ADC1,ADC_Channel_20,DISABLE);
  ADC_ChannelCmd(ADC1,ADC_Channel_21,DISABLE);
  ADC_ChannelCmd(ADC1,ADC_Channel_23,DISABLE);
  ADC_ChannelCmd(ADC1,ADC_Channel_22,ENABLE);
// ADC_VrefintCmd(ENABLE);
  ADC_Cmd(ADC1, ENABLE);
}

u16 Get_Adc(ADC_Channel_TypeDef ADC_Channels)
{
  ADC_SchmittTriggerConfig(ADC1,  ADC_Channels, DISABLE);
  ADC_ChannelCmd(ADC1,ADC_Channels, ENABLE);
  ADC_SoftwareStartConv(ADC1);
  while (ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC) == 0);
  return ADC_GetConversionValue(ADC1);
}

u16 Get_Adc_Average(ADC_Channel_TypeDef ADC_Channels,int times)
{
u32 temp_val,temp,value_buf[100];
u8 i,j,k;
delay_init(16);
temp_val=Get_Adc(ADC_Channels);
delay_ms(2);
temp_val=0;
for(i=0;i<times;i++)
{
   // temp_val+=Get_Adc(ADC_Channels);
   value_buf[i]=Get_Adc(ADC_Channels);
   delay_ms(2);

}
  for (j=0;j<times-1;j++)
  {
   for(i=0;i<times-j;i++)
   {
      if( value_buf[i]>value_buf[i+1])
      {
      temp = value_buf[i];
      value_buf[i] = value_buf[i+1];
      value_buf[i+1] = temp;
      }

   }
}
for(k=25;k<times-25;k++)
{
temp_val+=value_buf[k];
} return temp_val/50;

}

void main()
{Clk_Init();
// delay_init(16);
Gpio_Init();
Adc_Init();
Iwdg_Init();
Uart_Init(115200);//高波特率抗低频干扰
// SYS_Active_Halt_Enter();

while(1)
{
GPIO_SetBits(GPIOE,GPIO_Pin_0);
  u16 adcx,adcx1;
  float Temp,Temp1,Ref;
  char buf[2],i;
  // Adc_Init();
  adcx=Get_Adc_Average(ADC_Channel_22,100);
  Temp=(float)adcx*(3.273/4096);
  //adcx1=Get_Adc_Average(ADC_Channel_23,10);
  // Temp1=(float)adcx1*(3.3/4096);

  buf[0]=(u16)(Temp*10000)>>8;
  buf[1]=(u16)(Temp*10000);
//  CLK_PeripheralClockConfig(CLK_Peripheral_ADC1,DISABLE);
//  Uart_Init(115200);
  if (buf[0]!=0&buf[1]!=0)
  {for (i=0;i<2;i++)
{ USART_SendData8(USART1,buf[i]);
   while (USART_GetFlagStatus(USART1,USART_FLAG_TC)!=SET);
   delay_ms(5);
}
  }
}