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    • Bernd Porr's avatar
      usbdux: usbduxsigma: fixed timing issues between ADC and DAC · 75cc3ef8
      Bernd Porr authored
      
      
      When sync ADC and the DAC was running at the same time the ADC
      showed spikes in the signal. This happened when just before the
      DRDY from the ADC was triggered a DAC interrupt was dealt with.
      ADC and DAC share the same SPI bus and priority is now given the
      ADC. The DAC values are now first stored in a buffer and
      are only send to the DAC once the ADC has finished
      converting all channels (start = 0) so that the SPI bus is
      definitely quiet for about 100us.
      Signed-off-by: default avatarBernd Porr <mail@berndporr.me.uk>
      Signed-off-by: default avatarKyle McMartin <kyle@kernel.org>
      75cc3ef8