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External interrupts on the TMS320F2812 - how are they cleared?



Hello, I'm writing some driver software for the above device, so we have some flexible, re-usable code. From the documentation, I can see that there are flag registers for the 'pie' interrupts, that are used to clear an interrput. The documentation states the addresses of these registers, and CCS can display them. That's good!

 However, although there is mention of the flag register (IFR) for  'non-pie' interrupts, there is no mention of where this is, neither does it appear to be displayed in CCS. So, how do we clear external interrupt, such as INT13?    Thanks for your help, Julian.