CCS :: View topic - adc problem 18f4620

FAQ

Forum Help

Official CCS Support

Profile Log in to check your private messages Log in

CCS does not monitor this forum on a regular basis.

Please do not post bug reports on this forum. Send them to CCS Technical Support

adc problem 18f4620

CCS Forum Index -> General CCS C Discussion

View previous topic :: View next topic

Author

Message

pvol

Joined: 10 Oct 2008
Posts: 46
Location: GREECE

adc problem 18f4620

Posted: Thu Jan 01, 2009 12:42 pm

happy new year everyone

I made a program to plot on labview
6 different channels

channel 0,1 POT 1K
channel 2,3,4,5 sensor

I begin from 2 channel then 3 ,4,5..
at the end i put and the POTS

now starts the problem...
when i plot 2,3,4,5 everything ok
when i plot all of them
channel 0 and 2 confuses and show same thing!!! value of 0 goes to 2

I made a attempt to take off "duty" POT 0
and result was channel 1 and 2 confuses again!! value of 1 goes to 2

here is code:

Code:

#include <18F4620.h>
#device ADC=10
#fuses H4,NOWDT,NOPROTECT,NOLVP
#use delay(clock=40000000)
#byte porta=0xF80
#byte portb=0xF81
#byte portc=0xF82
//#byte portd=0xF83
//#byte porte=0xF84
#use RS232(baud=115200, xmit=PIN_C6, rcv=PIN_C7)
int count=0;
int16 cha1a[25];
int16 cha2a[25];
int16 cha3a[25];
int16 cha4a[25];
int16 cha1b[25];
int16 cha2b[25];
int16 cha3b[25];
int16 cha4b[25];
int16 cha1c[25];
int16 cha2c[25];
int16 cha3c[25];
int16 cha4c[25];
int16 cha1d[25];
int16 cha2d[25];
int16 cha3d[25];
int16 cha4d[25];
int16 cha1e[25];
int16 cha2e[25];
int16 cha3e[25];
int16 cha4e[25];
int16 cha1f[25];
int16 cha2f[25];
int16 cha3f[25];
int16 cha4f[25];

int flag=1;
int i=0;
int p=0;

#int_timer1
void t1mer(){

set_timer1(0xE0C0);

if(count<=25){

set_adc_channel(2);
delay_us(5);
cha1a[i] = read_ADC();
set_adc_channel(3);
delay_us(5);
cha1b[i] = read_ADC();
set_adc_channel(4);
delay_us(5);
cha1c[i] = read_ADC();
set_adc_channel(5);
delay_us(5);
cha1d[i] = read_ADC();

set_adc_channel(1);
delay_us(5);
cha1f[i] = read_ADC();
set_adc_channel(0);
delay_us(5);
cha1e[i] = read_ADC();
count++;
i++;
if(i>=25){
i=0; }

}
if((count>25)&&(count<=50)){

set_adc_channel(2);
delay_us(5);
cha2a[i] = read_ADC();

set_adc_channel(3);
delay_us(5);
cha2b[i] = read_ADC();
set_adc_channel(4);
delay_us(5);
cha2c[i] = read_ADC();
set_adc_channel(5);
delay_us(5);
cha2d[i] = read_ADC();
set_adc_channel(0);
delay_us(5);
cha2e[i] = read_ADC();
set_adc_channel(1);
delay_us(5);
cha2f[i] = read_ADC();
count++;
i++;
if(i>=25){i=0;
}
}

if((count>50)&&(count<=75)){

set_adc_channel(2);
delay_us(5);
cha3a[i] = read_ADC();

set_adc_channel(3);
delay_us(5);
cha3b[i] = read_ADC();
set_adc_channel(4);
delay_us(5);
cha3c[i] = read_ADC();
set_adc_channel(5);
delay_us(5);
cha3d[i] = read_ADC();
set_adc_channel(0);
delay_us(5);
cha3e[i] = read_ADC();
set_adc_channel(1);
delay_us(5);
cha3f[i] = read_ADC();
count++;
i++;
if(i>=25){i=0;
}
}
if((count>75)&&(count<=100)){

set_adc_channel(2);
delay_us(5);
cha4a[i] = read_ADC();
set_adc_channel(3);
delay_us(5);
cha4b[i] = read_ADC();
set_adc_channel(4);
delay_us(5);
cha4c[i] = read_ADC();
set_adc_channel(5);
delay_us(5);
cha4d[i] = read_ADC();
set_adc_channel(0);
delay_us(5);
cha4e[i] = read_ADC();

set_adc_channel(1);
delay_us(5);
cha4f[i] = read_ADC();
count++;
i++;
if(i>=25){i=0;

i=0;
flag=0;
count=0;

}
}
return; }

void main (void){
// set_tris_a(0xff);
// set_tris_b(0x00);
setup_adc_ports( AN0_TO_AN5 );
setup_adc(ADC_CLOCK_DIV_32);

set_timer1(0xE0C0); //interrupt every 0.8ms
setup_timer_1(T1_internal|T1_DIV_BY_1);
enable_interrupts(INT_TIMER1);
enable_interrupts(global);
while(TRUE){
while(flag);
disable_interrupts(INT_TIMER1);
for(p=0;p<=24;p++){

printf ("A %ld\n",cha1a[p]);
printf ("B %ld\n",cha1b[p]);
printf ("C %ld\n",cha1c[p]);
printf ("D %ld\n",cha1d[p]);
printf ("E %ld\n",cha1e[p]);
printf ("F %ld\n",cha1f[p]);}
for(p=0;p<=24;p++){
printf ("A %ld\n",cha2a[p]);
printf ("B %ld\n",cha2b[p]);
printf ("C %ld\n",cha2c[p]);
printf ("D %ld\n",cha2d[p]);
printf ("E %ld\n",cha2e[p]);
printf ("F %ld\n",cha2f[p]);}
for(p=0;p<=24;p++){
printf ("A %ld\n",cha3a[p]);
printf ("B %ld\n",cha3b[p]);
printf ("C %ld\n",cha3c[p]);
printf ("D %ld\n",cha3d[p]);
printf ("E %ld\n",cha3e[p]);
printf ("F %ld\n",cha3f[p]);}
for(p=0;p<=24;p++){
printf ("A %ld\n",cha4a[p]);
printf ("B %ld\n",cha4b[p]);
printf ("C %ld\n",cha4c[p]);
printf ("D %ld\n",cha4d[p]);
printf ("E %ld\n",cha4e[p]);
printf ("F %ld\n",cha4f[p]);}
enable_interrupts(INT_TIMER1);
set_timer1(0xE0C0);
flag=1;}}

where do you think is the problem?

thanks for any answer

Display posts from previous:

	CCS Forum Index -> General CCS C Discussion	All times are GMT - 6 Hours
Page 1 of 1

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum