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FRAM MSP430FR57xx ADC10, DMA Sample code in slac491.zip incorrect!

Other Parts Discussed in Thread: MSP-EXP430FR5739

FYI,

The MSP430FR57xx_adc10_10.c ADC10, DMA single-sequence example code by Priya Thanigai in the slac491.zip file has a problem when used with the MSP-EXP430FR5739 Experimenter Board. The DMAing of the ADC values was resulting in inconsistent and flakey results.

The problem with the example is that the DMA is configured for a Level sensitive trigger from the ADC10 instead of an Edge sensitive trigger. According to the MSP430FR5xx Family User's Guide, "For proper operation, level-sensitive triggers can only be used when external trigger DMAE0 is selected as the trigger."

I spent the better part of a day trying to figure this one out!

Dan

 

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