ST意法半导体中文论坛求STM8L151单片机的AD转换

求STM8L151单片机的AD转换

意法半导体社区提问时间：2015-11-12 14:13 /

问答
是否解决:

我使用STM8L151单片机，使用三个AD通道0、1、2三个，单次转换，0通道检测电池电压，目前单步运行是发现第一次结果正确，接下来的结果接错误了，使用16M晶振，程序如下：
GPIO_Init(BATTER_PORT, BATTER_PIN, GPIO_Mode_In_FL_No_IT);//电池检测管脚初始化
GPIO_Init(TEL_AD_PORT, TEL_AD_PINS, GPIO_Mode_In_FL_No_IT);

void AD1_Init(void)//AD初始化
{
      CLK_PeripheralClockConfig(CLK_Peripheral_ADC1,ENABLE);
      ADC_SchmittTriggerConfig(ADC1,BAT_AD_CHANNEL, DISABLE);
      ADC_SchmittTriggerConfig(ADC1,TEL_AD_CHANNEL1, DISABLE);
      ADC_SchmittTriggerConfig(ADC1,TEL_AD_CHANNEL2, DISABLE);
      ADC_Init(ADC1,ADC_ConversionMode_Single,ADC_Resolution_10Bit,ADC_Prescaler_1);
      ADC_SamplingTimeConfig(ADC1,ADC_Group_SlowChannels,ADC_SamplingTime_384Cycles);
      ADC_Cmd(ADC1,ENABLE);
      ADC_DMACmd(ADC1,DISABLE);
      ADC_ChannelCmd(ADC1,BAT_AD_CHANNEL,ENABLE);
      ADC_SoftwareStartConv( ADC1);
}

void AD_Function(void)//AD程序
{
u16 Temp1,Temp2;

      if(ADC1->SR & ADC_FLAG_EOC){
            Temp1 = ADC1->DRL;
            Temp2 = ADC1->DRH;
            Temp2 = (Temp2 << 8) | Temp1;
            ADBuf[ADChannel] = Temp2;
            switch(ADChannel){
                     case uaBAT://电池电压检测
                              if(ADBuf[uaBAT] < 341){             //1024*(1.1/3.3)
                                    if(ADBuf[uaBAT]<311)       //1024*(1/3.3)
                                    {Flag_off=TRUE;}
                                    Change_WriteData(0x12,0x40,5);
                              }
                              else
                              {Change_WriteData(0x12,0x40,6);}
                     break;
                     case uaTEL1:
                              if(ADBuf[uaTEL1] > 931)                                                                                                                      //1024*(3/3.3)
                              {ErrIn();}
                     break;
                     case uaTEL2:
                              if(ADBuf[uaTEL2] > 931)                                                                                                                      //1024*(3/3.3)
                              {ErrIn();}
                     break;
                     default:break;
            }
            ADChannel++;
            if(ADChannel == uaMax){
                     ADChannel = uaBAT;
            }
            ADC1->SR &= (~ADC_FLAG_EOC);
            ADC1->SQR[3] &= (~ADC_SQR4_CHSELS);
            ADC1->SQR[3] |= ADChannel;       /*使能通道*/
            ADC1->CR1 |= ADC_CR1_START;
      }
}

typedef enum {
      uaBAT = 0,//电池电压
      uaTEL1,
      uaTEL2,
      uaMax
}T_AD_CHANNEL;

求大神给个解释。。。。。。