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Problems using PIT to trigger a DMA

Question asked by Arnold Bischof on May 10, 2014
Latest reply on May 13, 2014 by Arnold Bischof

I have implemented a driver which periodically converts all AD channels and transfers the results within DMA to RAM. In my first version I used the PDB to trigger the DMA which starts the conversion sequence. This version worked fine. In my second version, I want to use a PIT (with same number as the DMA channel) which triggers the DMA. This version is not able to run because I get immediately after enabling the PIT a DMA SBE error (Source Bus Error) on the channel which is used by the conversion sequence.


Is there anybody who can help me with this issue?