I want to read data from an external ADC (AD7380 https://www.analog.com/en/products/ad7380.html) over SPI and DMA with equidistant sampling at ~100kSPS. To initiate the conversion process the CS has to be pulled down and the result clocks out on the serial output pin. Just to test the ADC I am calling LPSPI_MasterTransferEDMA in a general purpose timer.
Can I control the CS with a GPIO? I just need a starting point or an idea how to handle this problem.