ColdFire/68K Microcontrollers and ProcessorsのトピックDMA Bus errors when reading from ADC

DMA Bus errors when reading from ADC

marksheahan — Wed, 13 Dec 2006 10:26:31 GMT

I am trying to read from the ADC at 500KHz, and store it in a buffer. Interrupts weren't fast enough, so I want to use DMA to move data from the ADC result registers into the buffer. There is a bus error on source when reading from the ADC result registers. What might be causing this?

The device is a MCF52235.

Thanks in advance,
Mark

Re: DMA Bus errors when reading from ADC

marksheahan — Wed, 13 Dec 2006 13:43:30 GMT

Fixed, by setting master privilege register to include the DMA controller

Re: DMA Bus errors when reading from ADC

maximevincent — Thu, 13 Sep 2012 15:16:29 GMT

Thank you so much for this!

Had to set PBRIDGE0.MPL2 = 1;

GREAT!