AnsweredAssumed Answered

Vybrid DMA inter-core collisions

Question asked by Petr Kubiznak on Mar 9, 2014
Latest reply on Jun 11, 2015 by Timesys Support

Two months ago, I described a DMA collision issue with Vybrid audio when a playback is started on Linux (A5) while MQX is running on M4 (Vybrid audio (sgtl5000)).

 

Now I am experiencing a mirror problem - when an SPI DMA operation starts on M4, Linux immediately dies. Is there any document describing which DMA channels are used by Timesys Linux so I can setup MQX to use different channels and avoid the issues? Can that be easily seen/modified in the Linux sources?

Outcomes