regarding spi communication

RE: regarding spi communication

awneil — Mon, 29 Mar 2021 13:40:48 GMT

clearly it hasn't worked - because the ASSERT tells you that it is not initialised.

RE: regarding spi communication

manikandan — Mon, 29 Mar 2021 13:32:05 GMT

ya that function call is epd init() in my case and i have intialised it in my main

thanks and regards

manikandan v

RE: regarding spi communication

awneil — Mon, 29 Mar 2021 13:27:38 GMT

[quote userid="94222" url="~/f/nordic-q-a/73304/regarding-spi-communication/302357#302357"]what should i enable for spi communication??[/quote]

Those are just compile-time definitions to include SPI support in your code.

You need to actually initialise the SPI hardware at run time.

Take a look at the SDK documentation & examples - there will be a function call to initialise the SPI hardware.

RE: regarding spi communication

manikandan — Mon, 29 Mar 2021 12:04:09 GMT

thanks for your reply

[00:00:00.000,000] <error> app: ASSERTION FAILED at C:\folder\nRF5_SDK_15.0.0_a53641a\modules\nrfx\drivers\src\nrfx_spim.c:548

this is the error i am getting while debugging

in sdk for spi i have enabled the following things

NRFX_SPI_ENABLED 1

NRFX_SPI0_ENABLED 1

SPI_ENABLED 1

NRFX_SPIM_ENABLED 1

NRFX_SPIM0_ENABLED 1

SPI0_ENABLED 1

other than this what should i enable for spi communication??can you help me with this

thanks and regards

manikandan v

RE: regarding spi communication

awneil — Mon, 29 Mar 2021 08:14:51 GMT

The use of ASSERT is a standard programming practice - nothing specific to nRF52 or Nordic:

https://www.google.com/search?q=assert+c+programming

[quote userid="94222" url="~/f/nordic-q-a/73304/regarding-spi-communication/302288#302288"]first assert itself it is failing[/quote]

So this:

[quote userid="94222" url="~/f/nordic-q-a/73304/regarding-spi-communication"]NRFX_ASSERT(p_cb->state != NRFX_DRV_STATE_UNINITIALIZED);
[/quote]

This ASSERT will fail wen the state is NRFX_DRV_STATE_UNINITIALIZED

So you haven't initialised the SPI.

You need to initialise the SPI before you use it!

RE: regarding spi communication

manikandan — Mon, 29 Mar 2021 07:13:43 GMT

hello,

in first assert itself it is failing and i cant find the reason can you do any help regarding this?

thanks and regards

manikandan v

RE: regarding spi communication

Karl Ylvisaker — Mon, 29 Mar 2021 07:13:37 GMT

Hello,

As an addition to what @awneil already has suggested;
Do you have logging enabled from your device?
If so, please add DEBUG to your preprocessor defines, so that you may see a more detailed error message upon hitting the breakpoint error.
It should look like in the included image:

The asserts you've added in your ticket all just check that the SPI peripheral is initialized, and that the data the function is being called with is valid. So, if you're triggering these asserts you either have not initialized the SPI peripheral successfully, or you are trying to call the function with invalid parameters.

In any case we should know more about what is happening either when you define DEBUG and see your logger output, or use the debugger to step through your code like suggested by Awneil.

Best regards,
Karl

RE: regarding spi communication

awneil — Sat, 27 Mar 2021 10:33:51 GMT

[quote userid="94222" url="~/f/nordic-q-a/73304/regarding-spi-communication"]i am nrfbreak point error in this section[/quote]

So where, exactly, is that happening?

Presumably, one of those ASSERTs?

So step through it in the debugger to see which one is failing, and why.