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,,,, neEd assiStance..

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wAnted

New Member
what is the problem if the PIC16F877A don't provide an output? and it cant read input..

when I tried to load this to my friends PIC it works properly but in my PIC, it wont provide an output? whats wrong?

Code:
void main()
{
    unsigned int adc_val;    //hold adc value

    init_LEDS();
    init_ADC();
           
    PORTB = 0X00;
    start:    
    adc_val = read_ADC();
    DelayMs(40);
        if(adc_val < 573)                        
            {
            RB6 = 0;
            RB5 = 1;
            }
        if(adc_val >=573 && adc_val <= 860)                 
            {
            RB6 = 1;
            RB5 = 0;
            }
            if(adc_val >=880)                    
            {
            RB6 = 1;
            RB5 = 1;
            }
DelayMs(20);
     
    goto start;    
}
 
Last edited:

KMoffett

Well-Known Member
No program?
Bad program?
Low power?
No power?
Bad chip?
Miswired?

Maybe you could provide a "little more" information.

Ken

Thanks for adding the program.
 
Last edited:

Sceadwian

Banned
Operator that doesn't know how to use it?
Seriously, do people expect to get answers with questions like that?
 

wAnted

New Member
...

coz the first time it used it, it works properly then when i tried to load a program again it wont provide an output..how come? i've already tried test all its port but it doesn't provide an output..
 

kchriste

New Member
Forum Supporter
As far as I can see, you don't initialize which pin the ADC is to read let alone whether it is a digital, analog, input or output pin? ie: What library are init_ADC() and read_ADC() from?
A schematic would help also.
Post you code using the CODE tags to preserve formatting.
 
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