Problem

[huma]

hello ,
i want to turn on/off the LED after 5 sec using delay.
i write the following code .but its not changing the value on RD0,plz tell me where is the problem.Its my first program in C for PIC

///////////////////////code////////////////////////////
#include "16f877.h"
#fuses XT,NOWDT
#use delay(clock = 4000000)

void delay_seconds(int n)
{
for(;n!=0 ;n--)
delay_ms(1000);
}
void main()
{
set_tris_d(0x00);
while(true)
{
output_high(pin_D0);
delay_seconds(5);
output_low(pin_D0);
}
}

/////////////////////////////////////////////////

[ckielstra]

A classic error.

After setting the output_low a delay is missing, on the next instruction the processor will call ouput_high again. Too fast for your eye to see.

[treitmey]

Please post code using the code button.

You messed up in the while loop. If you follow the logic around
high
delay
low
high //you don't delay before this and you will not see the previous low
delay
low
high
...beat me by a min. :o)

[huma]

Thanks a lot ckielstra and treitmey.
its running well now.
Thanks once again.