Setting up SPI on NRF52832

RE: Setting up SPI on NRF52832

inspiringdev123 — Fri, 17 Feb 2023 15:35:48 GMT

Oops didnt know we had TWI set up on channel 0. All fixed, thanks for the help!

RE: Setting up SPI on NRF52832

inspiringdev123 — Fri, 17 Feb 2023 15:29:14 GMT

Added nrfx_spim.c and now am getting this from conflicting with nrfx_twi.c

RE: Setting up SPI on NRF52832

Jørgen Holmefjord — Fri, 17 Feb 2023 15:26:48 GMT

Yes, EasyDMA allows the peripheral to transfer data directly from/to RAM, instead of requiring the CPU to update the data pointer for each byte. This allows the CPU to handle other tasks like RADIO activity, or stay in sleep mode to save power.

RE: Setting up SPI on NRF52832

inspiringdev123 — Fri, 17 Feb 2023 15:24:39 GMT

Any advantage to using EASYDMA vs not?

RE: Setting up SPI on NRF52832

Jørgen Holmefjord — Fri, 17 Feb 2023 15:23:37 GMT

If you have both LEGACY and EASYDMA enabled for SPI in your sdk_config.h file, you need to include both nrfx driver source files, nrfx_spi.c and nrfx_spim.c.

RE: Setting up SPI on NRF52832

inspiringdev123 — Fri, 17 Feb 2023 14:47:26 GMT

RE: Setting up SPI on NRF52832

inspiringdev123 — Fri, 17 Feb 2023 14:44:16 GMT

Found and added it and still getting this error now "undefined reference to `nrfx_spim_init' "

RE: Setting up SPI on NRF52832

Jørgen Holmefjord — Fri, 17 Feb 2023 14:29:57 GMT

Hi,

The nrfx_spi(m) driver is used in the bottom layers even if you use the legacy driver APIs, the legacy API is primarily a middle layer between the application and the nrfx drivers. This means that you need to include the nrfx_spi.c source file in your project. You also need to enable the SPI driver in your sdk_config.h file, but this seems to be set correctly:

// <e> SPI_ENABLED - nrf_drv_spi - SPI/SPIM peripheral driver - legacy layer
//==========================================================
#ifndef SPI_ENABLED
#define SPI_ENABLED 1
#endif

When this config is defined, NRFX_SPI(M)_ENABLED config will be set correctly in apply_old_config.h.

Best regards,
Jørgen