SPI problem

RE: SPI problem

Karl Ylvisaker — Fri, 22 May 2020 09:17:01 GMT

Hello,

[quote user="Pinout_1"]thanks for the reply.[/quote]

No problem at all, I am happy to help!

[quote user="Pinout_1"]I think I solved the problem.[/quote]

I am happy to hear that you were able to resolve your issue.

[quote user="Pinout_1"]Also I made pin assignments according to the NRF52840 documentation. i think i was wrong when I set them up. And SPI communication started to work.[/quote]

Great. Conferring with the Pin Assignment is very important when working with the SoC's to ensure that the peripherals will work as intended.

[quote user="Pinout_1"]I don't have access to a NRF52840 DK, I have to make Dongle functional, considering that it is not expensive and practical to use.[/quote]

Yes, the dongle is both cheap and practical - a great companion when developing BLE applications, but the DK's makes it tremendously easier to develop with peripherals and other connections to the boards. I personally highly recommend checking out a DK, if you are going to develop a custom board.

Best regards,
Karl

RE: SPI problem

Pinout_1 — Thu, 21 May 2020 06:48:36 GMT

Hi Karl, thanks for the reply.

I think I solved the problem. On the master side I tried to port nrfx_spim project from the NRF5 SDK, and on the slave side i left the same ported code as before (SPIS project from the SDK). Also I made pin assignments according to the NRF52840 documentation. i think i was wrong when I set them up. And SPI communication started to work. Do not know why, but this is the only one solution which is working for me. Before this, I tried to port SPI example project code from the SDK, but it doesn't work with SPIS project. However, it works now and I think I will have the opportunity to adapt it.

I don't have access to a NRF52840 DK, I have to make Dongle functional, considering that it is not expensive and practical to use.

RE: SPI problem

Karl Ylvisaker — Wed, 20 May 2020 13:43:18 GMT

Hello,

[quote user=""]I'm trying to run demo SPI programs from NRF5 SDK. I want to create simple SPI communication between two dongles, of which one would be master and the other one - slave. Both projects (SPIS and SPI) compiled and I can flash them on the dongles.[/quote]

Neither the SPIS example nor the SPIM example in the SDK is made for the nRF52840 dongle(PCA10059 board). I assume that you have modified them using the Dongle Programming Tutorial or a similar resource? Could you also confirm which of the examples SPI, SPIS, SPIM, SPI_transaction_manager examples, and which SDK version you are working with?

Could you also tell me your pin configuration and SPI configurations on the two dongles?
From your description, it seems that the SPI is not configured/enabled correctly.

[quote user=""]Also I set pins which are further away from the antenna and which are unused.[/quote]

Did you have a look at the Pin Assignment documentation when doing this?

Do you have access to a Development Kit? Since the Dongle does not have an on-board debugger, many of the conventional embedded programming debugging techniques are unavailable. A DK would enable use of its debugger for the dongle application.

Best regards,
Karl

RE: SPI problem

Pinout_1 — Tue, 19 May 2020 08:29:15 GMT

https://imgur.com/a/uM4RfdF

the signal is the same on the whole SPI lines