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[stm32f429i-discovery] Added dac dma example.

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Piotr Esden-Tempski
2015-01-15 01:06:48 -08:00
parent dfac3be665
commit 016923e654
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examples/stm32/f4/stm32f429i-discovery/dac-dma/README Normal file
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DAC test with DMA and timer 2 trigger
Timer 2 is setup to provide a trigger signal on OC1, with a period of 142 Hz
The DAC is setup on channel 1 to output a sample on the timer trigger.
DMA controller 1, stream 5, channel 7 is used to move data from a
predefined array in circular mode when the DAC requests.
DMA transfer complete occurs when the data array has been passed through.
In the ISR port PC1 is toggled to provide a CRO trigger.
The analogue output appears on PA4 (DAC channel 1).
Tested and working, example capture from an oscilloscope is included
Ken Sarkies 15/01/2014