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Old 16 January 2020, 14:53   #10
ross
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Join Date: Mar 2017
Location: Crossing the Rubicon
Age: 49
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Quote:
Originally Posted by Herpes View Post
... one sees TWO consecutive 'triggerings' of the AUD0-IRQ handler. One for the sample-start and the second executing the switch-off DMA code. Fortunately switching off a disabled AUDx-DMA does NOT trigger the AUDx-IRQ handler - otherwise one would end up in recursion.

What started my confusion was my initial idea to do the switch-off in the handler - unfortunately and now I understand - one does not hear anything because of the immediate switch-off after the DMA was started
This is because Paula internal counter are still counting!
So you do not have a DMA fetch but IRQ
You need to stop immediately the trigger, disabling through INTENA.
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