18 lines
591 B
Plaintext
18 lines
591 B
Plaintext
DAC test with DMA and timer 2 trigger
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Timer 2 is setup to provide a trigger signal on OC1, with a period of 142 Hz
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The DAC is setup on channel 1 to output a sample on the timer trigger.
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DMA controller 1, stream 5, channel 7 is used to move data from a
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predefined array in circular mode when the DAC requests.
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DMA transfer complete occurs when the data array has been passed through.
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In the ISR port PC1 is toggled to provide a CRO trigger.
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The analogue output appears on PA4 (DAC channel 1).
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Tested and working, example capture from an oscilloscope is included
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Ken Sarkies 15/01/2014
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