Re: [avr-gcc-list] Problem to control S1D13305 (SED1335-Epson Controller) with using ATmega32

[Preston Wilson]

"Paulo Marques" wrote:

> Sach wrote:
>> hi,
>> 
>> I am trying to control S1D13305 (SED1335-Epson Controller) based Graphic LCD
>> with using AVR ATmega32 microcontroller.
>> [...]
>> 
>> void Delay(unsigned int counter)
>> {
>> while(counter)
>> {
>> counter = counter - 1;
>> }
>> }
> 
> I didn't check the whole code, but at least this part is bad as the
> compiler is free to optimize this function away completely.
> 
> Place a:
> 
> #define F_CPU  8000000UL
> 
> on the top of your code and use the delay macros in "util/delay.h".
> 
> I hope this helps,

The overuse of the global variable "i" is at least part of the problem.

-Preston