nrf52840 SPI slave configuration event_handler

RE: nrf52840 SPI slave configuration event_handler

Håkon Alseth — Fri, 11 Dec 2020 13:41:27 GMT

Hi,

[quote user="hmw"]What I want is to have an IRQ_Handler that allows me to give semaphore behavior when an interrupt occurs[/quote]

Then disabling the zephyr SPI driver (CONFIG_SPI*=n) and using the CONFIG_NRFX_SPIS driver directly is a possibility.

You should not mix "spi_nrfx_spis" into the mix here, as this is the port file for the zephyr SPI driver.

If you look at the nRF5 SDK example in peripheral/spis/, it has a slightly modified API (legacy API), but shows the flow of how to use the nrfx_spis driver.

Note that you should also add CONFIG_NRFX_SPISx=y to choose which instance you want to use.

Kind regards,

Håkon

RE: nrf52840 SPI slave configuration event_handler

hmw — Fri, 11 Dec 2020 12:06:09 GMT

Hello
Thank you for the code, but I have used it before and it doesn’t meet my requirements
What I want is to have an IRQ_Handler that allows me to give semaphore behavior when an interrupt occurs
At present, I am directly using nordic's spis code in zephyr to achieve this goal, but in the long run, it seems like it is not a good way.

Thanks,

Poyi

RE: nrf52840 SPI slave configuration event_handler

Håkon Alseth — Fri, 11 Dec 2020 10:13:19 GMT

Hi,

Here's a simplified spis example:

devzone.nordicsemi.com/.../7181.spis_5F00_test.zip

Could you try this?

Kind regards,

Håkon

RE: nrf52840 SPI slave configuration event_handler

hmw — Wed, 09 Dec 2020 09:22:39 GMT

Hello
Set as follows in my proj.conf

CONFIG_DEBUG=y

CONFIG_GPIO=y

CONFIG_SPI=y
CONFIG_SPI_NRFX=y

CONFIG_SPI_SLAVE=y
CONFIG_SPI_0=y

CONFIG_SPI_0_OP_MODES=2

CONFIG_SPI_0_NRF_ORC=0xff
CONFIG_NRFX_SPIS0=y

I also printk in the event_handler of spi_nrfx_spis.c to confirm whether this function will be reached
The result will be
How can I reference this event_handler in my main code?
So that I can provide semaphore in the event handler

thanks,

Poyi

RE: nrf52840 SPI slave configuration event_handler

Håkon Alseth — Mon, 07 Dec 2020 08:41:38 GMT

Hi,

You either use the NRFX (CONFIG_NRFX_SPIS) library, or the zephyr library (CONFIG_SPI*), not both at the same time.

They're two different libraries, interfacing the same peripheral.

[quote user="hmw"]Or is there something similar to spi_async_call_cb used in #if (CONFIG_SPI_ASYNC) to make CONFIG_NRFX_SPIS=y can do event handler?[/quote]

If you use CONFIG_SPI_ASYNC, you should follow the integration algorithm that is shown in the former test sample, by providing a specific thread where you poll for the spi data.

This will, from the driver, only provide a signal when anything happens on the SPIS bus.

If you want to use NRFX driver directly instead, there's unfortunately no example available, but you can have a look at the SPIS example in nrf5 sdk, and add the following to route the interrupt (this shows rtc as an example):

https://github.com/Rallare/fw-nrfconnect-nrf/blob/nrf9160_samples/samples/nrf9160/nrfx/rtc/src/main.c#L59-L63

Kind regards,

Håkon

RE: nrf52840 SPI slave configuration event_handler

hmw — Fri, 04 Dec 2020 08:48:50 GMT

[quote userid="2115" url="~/f/nordic-q-a/69034/nrf52840-spi-slave-configuration-event_handler/283098#283098"]If you use nrfx_spis (CONFIG_NRFX_SPIS=y) directly; you can do this using the approach with a event_handler.[/quote]

Hello
I just set CONFIG_NRFX_SPIS=y in prj.cpnf
But I still don’t know how to use event_handler
Do you mean that I can call the event handler directly in the main function?
In addition to #include "spi_slave.h" and #include <nrfx_spis.h> in the main function, to directly use the event handler in spi_nrfx_spis.c?
Or is there something similar to spi_async_call_cb used in #if (CONFIG_SPI_ASYNC) to make CONFIG_NRFX_SPIS=y can do event handler?

Thanks,

Po-Yi,Lin

RE: nrf52840 SPI slave configuration event_handler

Håkon Alseth — Thu, 03 Dec 2020 13:32:21 GMT

Hi,

The zephyr spis driver assumes that you use a dedicated thread, and use the k_poll functionality (signalled from the evt handler here: https://github.com/nrfconnect/sdk-zephyr/blob/v2.4.0-ncs1/drivers/spi/spi_nrfx_spis.c#L227), when you require asynchronous SPIS behavior:

https://github.com/nrfconnect/sdk-zephyr/blob/v2.4.0-ncs1/tests/drivers/spi/spi_loopback/src/spi.c#L470-L550

And this is the thread define:

https://github.com/nrfconnect/sdk-zephyr/blob/v2.4.0-ncs1/tests/drivers/spi/spi_loopback/src/spi.c#L603-L609

See the implementation that is guarded with #if (CONFIG_SPI_ASYNC) in the above spi.c file for further information.

If you use nrfx_spis (CONFIG_NRFX_SPIS=y) directly; you can do this using the approach with a event_handler.

Kind regards,

Håkon