九齐单片机NY8B062E的ADC零点校准程序记录

        最消费类的方案开发，一直用到九齐的片子，带AD的基本都是062D，但是后面推出了062E代替了D版，看资料，使用AD需要一个零点校准的初始化程序，刚开始也一脸懵逼，经过一番摸索有，在这里做一个记录，

//ADC初始化校准 ---------------------------------------------------------------------------------
//void F_ADJMD(void)
//void F_GND_Convert(char count)
//void ADC_Calibration_Pro(void)

void F_GND_Convert(char count)
{
      char i;
      ADMD  = 0x90 | C_VSS;                // Select (GND) pad as ADC input
      CLRWDT();                            //clear WDT, which is defined in NY8Common.h
      delay(100);                            // Delay 0.56ms(Instruction clock=4MHz/2T) for waiting ADC stable
      for(i=1;i<=count;i++)
      {                  
       ADMDbits.START = 1;                // Start a ADC conversion session
       while(ADMDbits.EOC == 0)
           ;                                // Waiting for ADC conversion complet    
       R_AIN_DATA_LB += ( 0x0F & ADR); 
      }
}

void F_ADJMD(void)
{
    DISI();
    ADMDbits.GCHS = 1;                    // Enable global ADC channel    (SFR "ADMD")
    F_GND_Convert(8);                    // executing GND ADC converting 8 times
    R_AIN_DATA_LB >>= 3;                // Only get Bit7~4

    if(R_AIN_DATA_LB >= 2)
    {
        ADJMD = 0x00;
        while(1)
        {
            CLRWDT();
            R_AIN_DATA_LB = 0;
            F_GND_Convert(8);            // executing GND ADC converting 8 times
            R_AIN_DATA_LB >>= 3;        // Only get Bit7~4
            if((ADJMD<0x1F) & (R_AIN_DATA_LB >= 2)){ADJMD++;}
            else if(ADJMD == 0x1F){ADJMD = 0x00;break;}
            else {R_AIN_DATA_LB = 1;break;}
        }
    }    

    if(R_AIN_DATA_LB == 0)
    {
        ADJMD = 0x20;
        while(1)
        {
            CLRWDT();
            R_AIN_DATA_LB = 0;
            F_GND_Convert(8);                    // executing GND ADC converting 8 times
                R_AIN_DATA_LB >>= 3;                // Only get Bit7~4
            if((ADJMD<0x3F)&(R_AIN_DATA_LB == 0)){ADJMD++;}
            else if(ADJMD == 0x3F){ADJMD = 0x20;break;}        
            else {break;}  
        }
    }
}

void ADC_Calibration_Pro(void)
{
    //----- Initial ADC-----      
    ADMD  = C_ADC_En | C_ADC_CH_Dis | C_VSS ;    // Enable ADC power, Disable global ADC input channel. Select PA1 pad as ADC input (SFR "ADMD")

 //----- ADC high reference voltage source select-----
//    ADVREFH = C_Vrefh_VDD;                    // ADC reference high voltage is supplied by internal VDD (Note: ADC clock freq. must be equal or less than 2MHz @ VDD=5.0V) 
//     ADVREFH = C_Vrefh_4V;                    // ADC reference high voltage is supplied by internal 4V  (Note: ADC clock freq. must be equal or less than 1MHz)
//     ADVREFH = C_Vrefh_3V;                    // ADC reference high voltage is supplied by internal 3V  (Note: ADC clock freq. must be equal or less than 500KHz)
     ADVREFH = C_Vrefh_2V;                    // ADC reference high voltage is supplied by internal 2V  (Note: ADC clock freq. must be equal or less than 250KHz)
      delay(100);                                // 4M/2T , 0.56mS
//----- ADC clock frequency select----------------------------     
//    ADR     = C_Ckl_Div1;                        // ADC clock=Fcpu/1, Clear ADIF, disable ADC interrupt    
//    ADR     = C_Ckl_Div2;                     // ADC clock=Fcpu/2, Clear ADIF, disable ADC interrupt    
    ADR      = C_Ckl_Div8;                    // ADC clock=Fcpu/8, Clear ADIF, disable ADC interrupt    
//    ADR     = C_Ckl_Div16;                    // ADC clock=Fcpu/16, Clear ADIF, disable ADC interrupt    
 
//----- ADC Sampling pulse width select-------------     
    ADCR  = C_Sample_1clk | C_12BIT;        // Sample pulse width=1 adc clock, ADC select 12-bit conversion ( Note: ADC clock freq. must be equal or less than 500KHz)
//     ADCR  = C_Sample_2clk | C_12BIT;        // Sample pulse width=2 adc clock, ADC select 12-bit conversion ( Note: ADC clock freq. must be equal or less than 1MHz)
//  ADCR  = C_Sample_4clk | C_12BIT;        // Sample pulse width=4 adc clock, ADC select 12-bit conversion ( Note: ADC clock freq. must be equal or less than 1.25MHz)
//     ADCR  = C_Sample_8clk | C_12BIT;         // Sample pulse width=8 adc clock, ADC select 12-bit conversion ( Note: ADC clock freq. must be equal or less than 2MHz)    

//--------------------------------------------------    
    ADJMD = 0x00;
    F_ADJMD();
}

标签：九齐,clock,void,NY8B062E,单片机,AIN,ADC,GND,ADJMD
来源： https://blog.csdn.net/jiuweiled/article/details/122527182