nRF52832: timer+PPI+SPI(DMA) can not control dac nicely

nRF52832: timer+PPI+SPI(DMA) can not control dac nicelyhttps://devzone.nordicsemi.com/f/nordic-q-a/39402/nrf52832-timer-ppi-spi-dma-can-not-control-dac-nicely【Question】：I want to use timer+ppi+SPI(with DMA) write DAC, but now something is wrong, when timer trigger the SPI to write DAC through PPI, it can call the "spi_event_handler" after the SPI write is finished, and NRF_SPIM2->TXD.PTR increases normallyen-USTelligent Community 13Fri, 12 Oct 2018 14:52:43 GMTRE: nRF52832: timer+PPI+SPI(DMA) can not control dac nicelyhttps://devzone.nordicsemi.com/thread/152726?ContentTypeID=1Fri, 12 Oct 2018 14:52:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d7aa181c-f025-4ce8-8a5e-3a3eaa2b355aJørgen Holmefjord<p>Have you checked the UART lines with a logic analyzer to see if there is any data transmitted from the nRF when using PPI to trigger the transfer?</p><div style="clear:both;"></div>