problem in blinking led with 16f877a

Ian Rogers said:

Where's the rest of it.... This couldn't possibly have compiled... What compiler are you using...

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hassankhan said:

i wrote a program in mikro c & put it into 16f877a, led didnt glow but when i touch one of the probe of multimeter with vdd pin of controller & other with osc2 then it was glowing, what is this?
please tell where i m making mistake??

code is

Code:

void main() {

TRISB = 0; // TO MAKE ALL PORT OUTPUT
     PORTB = 0; // TO OFF PORTB
     while(1)
     {
     PORTB = 0xff; // TO TOGGLE PORTB

     }
}

thanks & regards
hassan khan

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PORTB =~PORTB;

Ian Rogers said:

I have noticed that you are doing nothing in your code.... To toggle the port you should use..

Code:

PORTB =~PORTB;

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Ian Rogers said:

If your circuit is the same as this (with a crystal) it should work..... On a side note.. What speed is your crystal....... If it's 4mhz or below, you need to specify XT crystal setting in your IDE before compilation... If its above, you need to specify HS

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hassankhan said:

do u have any hex file for led at portb?

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House0Fwax said:

Here is one, I have tried it with a 4 MHz crystal and a 100K resistor from MCLR to +. It works fine.

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Ian Rogers said:

Tons... In my signature..... They are based on Nigel's ASM tutorials and use the same boards.... You build The dev board laid out in Nigel's Pic tutorial site and run all my examples on them.

I also did a MPLAB IDE tutorial with basically the same code as you want.... https://www.electro-tech-online.com/threads/eb08.582/

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