two adc conversion problem

[rnome]

hi everybody

i m using an analog joystick to control a mobile robot but i cant read joysticks potentiometer values truly.

i wrote these codes

#include <16F877.h>
#device ADC=8
#fuses XT,NOWDT,NOPROTECT,NOLVP
#use delay(clock=4000000)
#include <lcd.c>

void main()
{
int data_a0, data_a1;

setup_adc_ports(ALL_ANALOG);
setup_adc(ADC_CLOCK_DIV_8);

for(;;)
{
set_adc_channel(0);
read_adc(ADC_START_ONLY);
delay_us(100);
data_a0=read_adc(ADC_READ_ONLY);

set_adc_channel(1);
read_adc(ADC_START_ONLY);
delay_us(100);
data_a1=read_adc(ADC_READ_ONLY);

lcd_init();
lcd_gotoxy(1,1);

printf(lcd_putc, "%03u 1.axis\n",data_a0);
printf(lcd_putc, "%03u 2.axis\n",data_a1);
delay_ms(200);
}
}


Problem is although i move joystick on one axis other axis is effecting from this movement.

i checked the hardware many times and i cant find any problem.

also i make a Proteus simulation and it works perfect. i mean on software axises aren't effecting from others movement


_________________
live fast, never rest and do your best

[PCM programmer]

[rnome]

hi mate

the conflict between my schematic and program codes is not important i noticed it and edited but your second advice solve the problem completely. god bless u=)
_________________
live fast, never rest and do your best