AVR-Chat

On Tue, Feb 24, 2009 at 4:10 PM, Bill Knight <BillK@rosw.com> wrote:
> David
>   In addition to the other responses, is the following what you
> intended elsewhere?
>
> if ((Raw_Data_Size == 0) && !(GICR & (1 << INT0)))
>
> (note usage of '==' and '&&')
>
> You might also want to revisit the following:
>
> GICR  |= (1<<INT0)|(0<<INT1);
>
> It might be what you want but, for reference is equivalent to
>
> GICR  |= (1<<INT0);
>
> Regards
> -Bill Knight
> R O SoftWare
>
>
> David VanHorn wrote:
>> I'm using GCC.
>>
>> When I comment out the first Debug_Port line, the debug pin does not go high.
>> When I leave it in, the debug pin goes high, but never goes low.
>> Am I missing something special I have to do to exit an ISR?
>>
>> // Timer 0 overflow ISR
>> ISR(TIMER0_OVF_vect)
>> {
>>       Debug_Port |= (1 << Debug_Pin); // High
>>
>>       // Dec to zero timer
>>       if (LCD_Timer > 0)
>>       {
>>       LCD_Timer--;
>>       }
>>
>>       if ((Raw_Data_Size = 0) & !(GICR & (1<< INT0))) //
>>       // If the summer is finished, and sampling is disabled
>>       {// enable sampling
>>               GICR  |= (1<<INT0)|(0<<INT1);   // Enable eampling
>>               Raw_Edge_Flag = 0;                              // Looking for the start of a pulse
>>       }
>>
>>       Debug_Port |= (0 << Debug_Pin);         // Low
>> }
>>
>
>
>
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