Re: [avr-gcc-list] if test ignored?

[Parthasaradhi Nayani]

Rick Mann <address@hidden> wrote:
>  On an AVR ATmega128:
>
> I have two source files. In Serial.c, I define a global:
> char sCommandReceived;
>
> in the corresponding Serial.h file, I have:
>
> extern char sCommandReceived;
>
> sCommandReceived is set to 1 when enough bytes have been copied into  
> a buffer from the serial port. In main.c, which includes Serial.h, I  
> have:
>
>  while (true)
>  {
>   if (sCommandReceived)
>   {
>    parseCommand();
>   }
>  }
One probable cause could be 'sCommandReceived' not declared as volatile if it is being accessed in the interrupt

Nayani

Choose the right car based on your needs. Check out Yahoo! Autos new Car Finder tool. http://us.rd.yahoo.com/evt=48518/*http://autos.yahoo.com/carfinder/;_ylc=X3oDMTE3NWsyMDd2BF9TAzk3MTA3MDc2BHNlYwNtYWlsdGFncwRzbGsDY2FyLWZpbmRlcg-- hot CTA = Yahoo! Autos new Car Finder tool