szadin.c

数字面板开发的单片机的软件仿正程序

void ADIN(void)
{
	if(adsample)
  {
  	TMPL=TMR0-T100US;
    if(TMPL>=TADSAMPLE)
    {
        if(!ADCHSALLOFF)
        {
            ADCON1=ADINI;
		#ifdef LC87
						ADRLC=0X1;
		#endif
            ADCON0=ADCHS0;
            ADCNT0=0;
            ADVL=0;
            ADMH=0;
            ADST1();
            T100US=TMR0;
        }
        else
        {
            ADGO1();
            adsample=0;
            adsetup=1;
        }
    }
  }
  else if(adsetup)
  {
      if(ADENDIFOK)
      {
      	ADENDIFCLR;
		#ifndef LC87
          STATUS=0;
		#endif
					TMPL=ADCON0&ADCHSALL;
          if(TMPL==ADCHS0)
          {
          	ADM+=ADRHC0;
						if(CARRY)
						{
							ADH++;
						}
          }
          else if(TMPL==ADCHS1)
          {
						ADM+=ADRHC1;
						if(CARRY)
						{
							ADH++;
						}
					}
          else if(TMPL==ADCHS2)
          {
						ADM+=ADRHC2;
						if(CARRY)
						{
							ADH++;
						}
          }
          ADCNT0++;
          if(ADCNT0==4)
          {
          	TMPHL1=ADMH;
          	TMPHL=ADV0MH;
            ADCON0=ADCHS1;
            advalu=1;
          }
          else if(ADCNT0==8)
          {
          	TMPHL1=ADMH;
          	TMPHL=ADV1MH;
            ADCON0=ADCHS2;
            advalu=2;
          }
          else if(ADCNT0==16)
          {
          	TMPHL1=ADMH;
          	TMPHL=ADV1MH;
            ADCON0=ADCHS3;
            advalu=3;
            ADCNT0=0;
          }
					if(advalu)
					{
						TMPHL1-=TMPHL/4;
						if(!bittest(TMPH1,7))
						{
							TMPHL+=TMPH1*2;
							TMPHL+=TMPL1;
						}
						else
						{
							TMPHL1=0-TMPHL1;
							TMPHL-=TMPH1*2;
							TMPHL-=TMPL1;
							if(bittest(TMPH,7))
							{
								TMPHL=0;
							}
						}
						if(advalu==1)
						{
							ADV0MH=TMPHL;
						}							
						else if(advalu==2)
						{
							ADV1MH=TMPHL;
						}							
						else
						{
							ADV2MH=TMPHL;
						}							
						ADMH=0;
						advalu=0;
            advok=1;
          }
          T100US=TMR0;
          adsample=1;
          adsetup=0;
      }
  }
  else
  {
      ADCON1=ADINI;
			#ifdef LC87
			ADRLC|=0X1;
			#endif
      ADCON0=ADCHS0;
      adsample=1;
      ADCNT0=0;
      ADMH=0;
      T100US=TMR0;
   }
}