adc_volt0-5.c

adc volt meter pic micro

#include<pic.h>

#include<math.h> 
unsigned char A,B,a,z,i,data,l,m;
unsigned int I,j,k;
void main()
{
		#define ADCOSC		0b01000000		// ADC convertion clock fosc/8
		#define CHANNEL0      0b00000000		// ADC channel 0 (RA0/AN0)
		#define ADCON		0b00000101		// ADC power on
		ADRESH=0x00;
		ADRESL=0x00;
		TRISA=0b11111111;
		TRISC=0x00;
		TRISD=0x00;
			
		ADCON1=0b10000000;					//right justified 

		ADCON0= ADCOSC | CHANNEL0 | ADCON;
		ADCON0= ADCON0 | 0b00000100;		//start conversion
	
		while(1)
		{
		z=0b00010000;
		while(ADGO)
			{ }
			A=ADRESH & 0b00000010;
			B=ADRESH & 0b00000001;
	 
		if(A==2)
		{j=512;}
		else
		{j=0;}
		if(B==1)
		{k=256;}
		else
		{k=0;}
		I=j+k+ADRESL;					//512+256+255=1023
		if(I>=0 && I<=204)
		{
		PORTC=0x01;			//data
		PORTD=0x01;			//power
		}
		else if(I>=205 && I<=409)
		{
		PORTC=0x02;
		PORTD=0x01;
		}
	 	else if(I>=410 && I<=613)
		{
		PORTC=0x03;
		PORTD=0x01;
		}
		else if(I>=614 && I<=818)
		{
		PORTC=0x04;
		PORTD=0x01;
		}
		else if(I>=819 && I<=1023)
		{
		PORTC=0x05; 
		PORTD=0x01;
		}
}		
}