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ok thanks... here's the test code that i've upgrade thanks to wayne......
#include <16f877a.h>
#device adc=8
#use delay(clock=20000000)
#fuses hs, noprotect,nowdt,nolvp
#byte PORTB= ...

thanks for your suggestion, may i ask
sensor = 0;
set_adc_channel(0); //set to read channel a0 next
delay_us(20);
if (read_adc() < 128)
sensor ...

i know that this program is actually "stupid" so i tried to use different approach... here's the idea:

1. there are 5 sensors in the program (basically 4 is digitally triggered and only 1 ...

Hello everybody... I have this code... basically it based on logic operation to get the output... the actual code has 5 logic so it has 32 possibilities.

My main problem is the simulation is workin ...

Dear friends, with your help I have this following coding.

#include <16f877a.h>
#device adc=8
#use delay(clock=20000000)
#fuses hs, noprotect,nowdt,nolvp
#define 1 PIN_C0
#define ...

so far this is the best i could do... maybe if u can tell me what is the proper way to manipulate the data using if i can finished this programs...
that is the only main problem that i've encountered ...

Currently the initial code has been repaired. The problem is I still don't get the idea of the if() function. Could you give me a hint please. Sad

Hello friends I'm new here. I need your help. Thanks in advance.
Okay my problem is that I am developing a mobile robot that solves a maze by using ultrasonic, infrared sensor, etc. The problem is I ...