"Integral constant expected"

For some reason i can't use a variable to use with delay_us() with Mikro for a PIC, I am making like a homemade PWM since my pic doesn't support it

Code ( (Unknown Language)):

1.  
2.  
3. unsigned int delay;
4. void main(){
5.     TRISB = 0;
6.     PORTB = 0;
7.     delay = 0;
8.     while(1){
9.         PORTB = 0xff;
10.         delay_us(1);
11.         PORTB = 0;
12.         delay_us(delay);
13.        
14.         if(delay < 50000){
15.             delay++;
16.         }
17.         else{
18.             delay--;
19.         }
20.     }
21. }
22.  

That brings up the error of "Integral constant expected" for "delay_us(delay);"

However if i used say delay_us(5); it works completely fine?

thanks for any help

 

You'll have to write you own delay loop function, just a for( ; ; ) with the input value multiplied by whatever you need to get uS.

 

The delay_us() function does not support variables, according to your problem. Therefore, as rjenkins said, you can use a for loop and set the delay_us() inside the loop to 1 us. Then use your variable delay to execute the loop as many times you want the total delay.

 

Ahh sounds reasonable - will try that out, thanks