SPI event handler not beeing called

RE: SPI event handler not beeing called

Hugh Wu — Fri, 15 Oct 2021 11:23:41 GMT

Hi all,

Just for sharing.

I have a similar problem, too. The spi_event_handler function works at first, but after connecting to the BLE central device, and then I want to call the spi_transfer function, and then the spi_event_handler into the infinite loop even I add APP_ERROR_CHECK to check nrf_drv_spi_transfer().

It's problem that the SPI has lower interrupt priority than the BLE connect handler. So, I modify my sdk_config.h to modify the SPI IRQ from 6 to 2, and then it works.

devzone.nordicsemi.com/.../spi-handler-callbacks-not-invoked-with-nrf_sdh_dispatch_model_interrupt

Also, you can check this link.

Thanks

BRs,

Hugh

RE: SPI event handler not beeing called

inghowe83 — Fri, 28 Jun 2019 10:50:17 GMT

Hi @Bastian, what did you change to fix the deadlock issue?

RE: SPI event handler not beeing called

inghowe83 — Fri, 28 Jun 2019 10:49:29 GMT

Hi There. I face similar issue, I not sure what you mean by BSP event handler. How to waiting for SPI out side the BSP handler?

RE: SPI event handler not beeing called

Bastian — Fri, 14 Sep 2018 14:54:43 GMT

thats it, thank you

RE: SPI event handler not beeing called

MartinBL — Fri, 14 Sep 2018 14:29:26 GMT

It could be an issue with interrupt nesting. It seems like you start the SPI transfer from within the BSP event handler. If the SPI has lower interrupt priority than the BSP handler, then the SPI handler will not be executed before the BSP handler has completed. But since you are effectively waiting for the SPI in the BSP handler you end up in a dead lock.

RE: SPI event handler not beeing called

Bastian — Fri, 14 Sep 2018 13:48:01 GMT

Hi Martin,

I put an APP_ERROR_CHECK around nrf_drv_spi_transfer and it did not raise an issue. I stepped throught the function and it seems like it runs as it is supposed to do. Return value of nrf_drv_spi_transfer is SUCCESS.

RE: SPI event handler not beeing called

MartinBL — Fri, 14 Sep 2018 12:10:21 GMT

Hi,

You should check the return code of nrf_drv_spi_transfer(). If the function of some reason fails, it will return an error code without starting any SPI transfers. Hence you will never get a call back, and you will be stuck in the while loop.

RE: SPI event handler not beeing called

KevinL — Fri, 14 Sep 2018 11:46:50 GMT

Hi Bastian,

I can't really help you much with your issue as I think I'm having the same issue. Do you enter the infinite loop in while(!spi_xfer_done) when you call from the context of a button event handler?

I have been advised to used the SPIM peripheral (nrfx_spim). Although this has not solved the issue for me yet, it does seem to be the currently advised go-to SPI peripheral.