A/D Conversion PIC 16F

For program ADC, you need to setup ADCON0 and ADCON1 address. For read the channel, just use function

int read_a2d(unsigned char channel)
{ADCON0=0b00000001; //Turn on A/D module
ADCON1=0b10000000; //configures analog and voltage reference pins
ADCON0=(ADCON0&0xC7)|(channel<<3); //select analog input channel
__delay_ms(2);
ADGO=1; //initiate conversion on the selected channel
while(ADGO==1) continue; //wait until conversion done
return(256*ADRESH+ADRESL);}

Full program, you can see here, #-Link-Snipped-#

sbit start_stop at ADCON0.B2;

void Init_Adc()
{
ADCON0 = 0x81;
ADCON1 = 0x80;
TRISA = 0x01;
}
void delay()
{
int i;
for(i=0;i<40000;i++) ;
}
void lcdcmd(unsigned char c)
{
PORTD =c;
PORTB=0x10;
delay();
PORTB=0x00;
}
void lcddata(unsigned char c)
{
PORTD=c;
PORTB=0x14;
delay();
PORTB=0x04;
}

void Lcd_Init()
{
lcdcmd(0x38);
delay();
lcdcmd(0x0C);
delay();
lcdcmd(0x06);
delay();
lcdcmd(0x01);
delay();
}

void read_disp_adc()
{
int x,x2,x3,x4,x1;
float b,a;
int d1,d2,d3,d4,d5;

unsigned char arr[20]="0123456789";

x = ADRESL ;
x2 = ADRESH;

x1 = x;
x3=(x2>>8);
x4=x3|x;


b=x4*5;
a = b/255;

d1 = (long)a;
d1+=0x30;

d2= a*10;
d2%=10;
d2+=0x30;

d3= a*100;
d3%=10;
d3+=0x30;

d4= a*1000;
d4%=10;
d4+=0x30;

lcdcmd(0x80);
lcddata(d1);
delay();
lcddata('.');
delay();
lcddata(d2);
delay();
lcddata(d3);
delay();
lcddata(d4);
delay();
}

void main()
{
TRISB = 0x00;
TRISD = 0x00;

Init_Adc();
Lcd_Init();

while (1)
{
start_stop = 1;
while (start_stop == 1);
read_disp_adc();
}
}
;-) Enjoy.......!!

hey gr8 work ....

Hi,

i am interested in a/d converter programming ,
want 5 channel i/p (0-5v)
and want o/p 30 channels.
1 i/p channel converts to 6 digital o/p (0-5v => 6 channel )

pls suggest which microcontroller to use and how