bigmac

Detecting IRQ pin state in C

Discussion created by bigmac on Jan 27, 2011
Latest reply on Jan 27, 2011 by kef

Hello all,

 

I am using the MC9S08GT32A in conjunction with CW 6.3.  This device has a dedicated IRQ pin that is not shared with any GPIO.

 

Within a C program, I need to detect the current state of the IRQ pin, without generating an interrupt.  Using assembly code, I have the BIH and BIL instructions available, which might potentially be used within inline assembly code, But at this moment I am not sure how this would be accomplished.  

 

I wonder if there might be a simpler method, or perhaps an existing library function or macro within CW.

Any suggestions would be welcome.

 

Regards,

Mac

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