Me too have the same problem. I didn't succeed to use adc and dac simultaneously. The error that I get is: E (3388) spi: alloc_dma_chan(212): no available dma channel assert failed: dma_chan_free spi_common.c:331 (spi_dma_chan_enabled & BIT(dma_chan)) If I stop the continuous DAC and try just contin...