Proper EOI sequence for 5213 IRQs

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Proper EOI sequence for 5213 IRQs

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philroth
Contributor III

Hi,

I've inherited an old project and adding ISR routines to IRQ1-IRQ7 pins of the 5213.  Pretty sure I have the EPORT configured properly since I do enter the ISR but can only enter once. I'm running on an old freescale Evaluation board. (the one with 3 pushbuttons connected to IRQ1, IRQ2 and IRQ3).  Old freescale app notes refer to EPORTSoftwareDemo.zip which contains source for ISR examples but that file is no longer around.

 

Any help explaining the proper EOI sequence will be appreciated

 

Thanks

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philroth
Contributor III

I just realized there was low level code already setting up the stack frame before my function so all I needed was a void function(void) call, terminating on an RTS rather than RTE.  So I'm good to go now.

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