PSEL.MOSI How to select MOSI pins? Need clarification.

RE: PSEL.MOSI How to select MOSI pins? Need clarification.

hmolesworth — Wed, 16 Dec 2020 22:03:55 GMT

Quick sample of low-level and Nordic driver:

NRF_SPIM0->PSEL.MOSI = 12;

nrf_drv_spi_config_t spi_config = NRF_DRV_SPI_DEFAULT_CONFIG;
spi_config.mosi_pin = 12; // SPI_MOSI_PIN;

RE: PSEL.MOSI How to select MOSI pins? Need clarification.

polishdude20 — Wed, 16 Dec 2020 21:53:17 GMT

Ok thanks!

RE: PSEL.MOSI How to select MOSI pins? Need clarification.

hmolesworth — Wed, 16 Dec 2020 21:52:00 GMT

Ah, there are two options, use the Nordic library drivers which have examples there is a config call for each peripheral, or you can use low-level drivers which is what I showed

RE: PSEL.MOSI How to select MOSI pins? Need clarification.

polishdude20 — Wed, 16 Dec 2020 20:46:58 GMT

Ah so in the programming environment if you set PSEL.MOSI = 12 like that it will automatically know what it is? Or is that in some config files somewhere?

RE: PSEL.MOSI How to select MOSI pins? Need clarification.

hmolesworth — Wed, 16 Dec 2020 20:37:34 GMT

Like this:

PSEL.MOSI = 12;

There is a macro for decoding port pins on parts with P0, P1 etc but for the nRF52832 the above is simpler.