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BeB's avatar
BeB
Icon for Occasional Contributor rankOccasional Contributor
1 year ago

Why overwrite/reset the complete edge register in a PIO ISR?

Hello, Refering to the Nios 2 software handbook (code below), why overwrite *edge_capture_ptr completely and clear the entire edge capture register with IOWR_ALTERA_AVALON_PIO_EDGE_CAP systematical...
Nios Cpu
tehjingy_Altera's avatar
tehjingy_Altera
Icon for Regular Contributor rankRegular Contributor
1 year ago

Hi


Do you have any update on this case?

Did you try out the suggested parameters?


Regards

Jingyang


BeB's avatar
BeB
Icon for Occasional Contributor rankOccasional Contributor
1 year ago

Hello,

Sorry for the late reply.

Your suggestion concerns the pio output register, which was not really the matter.

I am trying to understand why the complete variable 'edge_capture_ptr' should be overwritten when reading the edge capture register, and whether information from previous interrupts may be lost because of that.

Thank you!

Bertrand