SPI Master and PPI with two different SPI slaves: toggling CS pin

[dpalma]

Hi,

I am working with the nRF52832 DK. I want to program a couple of ICs with SPI every 2 ms. I have successfully configured the nRF as SPI master and I start the SPI transfers with a TIMER via PPI. However, I don't know how to properly toggle the CS pin of each IC. I guess I can use another TIMER with CC events and toggle each CS with the CPU but I don't know there is some other 'best' option.

Thanks in advanced.

[Susheel Nuguru]

You can use the fork mechanism to fork another TEP from the timer to the GPIOTE. The GPIOTE should be configured to toggle with task.

 TIMER.EVENT (EEP)  --------   SPI_TASK (TEP)

                                        |  (fork)

                                         ------  GPIOTE   (TEP)