Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

DeviceIOControl - DMA - Interrupt issues

Hi, Here is the logic flow: 1. GUI program sends DeviceIoControl command setup to driver: setup DMA descriptors 2. GUI program sends DeviceIoControl command Start to driver: call ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

There are two problems: One it needs synchronization, and the other is to check the interrupt status registers, because the interrupt is shared by both read and write. That fixes the problem.