SPIM Transfers with delays between bytes

[Tynan LTT]

I am trying to communicate with a sensor that has some interesting timing requirements for reading information from it, it requires ~100us delays between the address to read and the next clock cycle to read out the data. I haven't figured out how to implement this correctly using the SPIM.

My clock speed is 2Mhz and default configs for everything else other than the pins.

I have put an oscilloscope on the lines and the MISO, MOSI, and SCLK lines are behaving as I would expect, Other than wanting to put a 100us pause between the two bytes in a transfer.

Any advice is appreciated!

[Sigurd]

Hi,

If using a simple nrf_delay_us() between the SPI transfers is not providing the needed time accuracy, you would need to use the TIMER peripheral, and trigger the SPI transfer with PPI.

We have some documentation around this here: https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.2/hardware_driver_spi_master.html#hardware_driver_spi_advanced