problem in blinking led with 16f877a

[hassankhan]

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

i provided the complete code above, i m using mikroc compiler, tell me plz what should be the code?

 

[Ian Rogers]

I don't use mikroC.... The code is fine then... Must be the hardware.... I believe there are options and settings in the MickoC IDE...

Sorry... But I use Microchips own compilers...

 

[hassankhan]

anybody tell me the solution plz

 

[Ian Rogers]

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

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

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

PORTB =~PORTB;

 

[hassankhan]

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

PORTB =~PORTB;

i m not blinking , i just want constantly glowing led

 

[Ian Rogers]

Sorry... But your code definitely said toggle.

Have you got a schematic to show me how the LED's are connected...

 

[hassankhan]

 

[Ian Rogers]

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

 

[hassankhan]

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

yeah its 4mhz,& i have made that before compilation
do u have any hex file for led at portb?

 

[House0Fwax]

do u have any hex file for led at portb?

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

 

[hassankhan]

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

it is still not working i guess there is problem in programmar or programmar config,help me plz

 

[Ian Rogers]

Have you bought mikroC or is it the free trial..... If you use MPLAB IDE and Hi-tech / XC8... There are student versions for free There are more people here that use MPLAB than MikroE...

 

[hassankhan]

then plz provide me tutorials that i can easily switch to mplab

 

[Ian Rogers]

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/

 

[hassankhan]

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/

ok i m starting from now
thanks