How to use a variable as a parameter in a function that only suports constant expresssion

Question

I\'m using this function:

__delay_cycles(var); 

and I get the following error:

Argument to _delay_cycles

Answer 1

One suggestion that immediately springs to mind is to call __delay_cycles() with a constant argument, but do it in a loop, and vary the number of loop iterations.

The loop will add some overhead, so if you need precision you'll have to subtract the (constant) cost of one loop iteration from the (constant) argument to __delay_cycles().