How to to drive an SPI DAC with DMA?

[AutogolazzoJr]

Hello, I am trying to drive an MCP4922 12-channel SPI DAC with an esp32 using DMA. I was previously able to do this with a teensy 3.2, and the spi output looks something like this:


I am trying to do this using an esp32 and DMA, but the DAC requires the chip select line to pulse every time a 2-byte word is sent. I can of course do an spi_device_transmit() for each 2-byte word, but this is not nearly fast enough to reproduce the signal in the image above. Is there any way I can go about creating an SPI signal like the one in the image? Thanks.

[janlksrckts]

Hi AutogolazzoJr
Did you ever figure out how to use DMA to MCP4922 SPI DAC and pulsing the CS of the DAC every 2 bytes?
I'm having the same issue now with an MCP4823 which is from the same DAC family. Thanks.