MCP25625 with nrf52832

RE: MCP25625 with nrf52832

bjorn-spockeli — Fri, 01 Nov 2019 06:59:17 GMT

I found this question which contains some code for the MCP2515: https://devzone.nordicsemi.com/f/nordic-q-a/9353/mcp2515-with-nrf51-dk/122706#122706. Note: its for the nRF51, but it should not be a very much work to port it to a nRF52.

You simply set which pins you want to use in the nrfx_spim_config_t struct that you pass to nrfx_spim_init, which initializes the SPI Master driver.

You should also take a look at the SPI Master Example in our nRF5 SDK v16.0.0.

RE: MCP25625 with nrf52832

christoph1433 — Thu, 31 Oct 2019 16:16:46 GMT

Hi Bjørn,

thank you for your answer and the information about the GPIOs, that really helps.

Just to make sure, there is also no driver for MCP2515? It is basically the same chip without a CAN transceiver.

Also is there a tutorial or instructions on how to program/change GPIO functions of the nRF52832? I am struggling to find a staring point.

Thanks,

Christoph

RE: MCP25625 with nrf52832

bjorn-spockeli — Thu, 31 Oct 2019 09:43:49 GMT

Hi Christoph,

I am afraid that we do not have a driver or library for the mcp25625 ? However, it could be that some in the community has made one and is willing to share.

As for the pin assignment for SPI on the nRF52832, there are some GPIOs that should only be used for low frequency signals(i.e. up-to 10kHz) due to their proximity to the radio power supply and antenna pins, see GPIO usage restrictions.

Hence, I would recommend using other pins than P0.31 and P0.30 for MOSI and SCK.

Best regards

Bjørn