DevAcademy intermediate Lesson 5 Exercise 2 alternative RPi Display with nrf9161DK

RE: DevAcademy intermediate Lesson 5 Exercise 2 alternative RPi Display with nrf9161DK

Håkon Alseth — Fri, 11 Oct 2024 12:53:13 GMT

Hi,

The trace does not show any activity on the MISO (master in - slave out) line, which the display should use to respond to the nRF host.

[quote user="EgilCL"]Im still fairly new to the nrf and vscode, so im unsure how to get the logs? here are the output from the terminal:[/quote]

Logs are by default outputted on the UART. You can open up your favorite terminal (putty, teraterm, nrf serial etc) and connect to the COM-port with 115200 baud rate, and you should get a log output.

[quote user="EgilCL"]*I put "CONFIG_DK_LIBRARY=n" into the prj.conf but it still shows the conflict between pins.[/quote]

vscode will warn you about the conflict, as the devicetree entires do indeed conflict, but if you do not use the LEDs/Buttons, the GPIOs will be unused.

Have you checked the datasheet of your display driver to see if this is compatible with the ilitek9340?

Kind regards,

Håkon

RE: DevAcademy intermediate Lesson 5 Exercise 2 alternative RPi Display with nrf9161DK

EgilCL — Thu, 10 Oct 2024 08:23:39 GMT

devzone.nordicsemi.com/.../nrf9161DK_5F00_SPI_5F00_Display.zip

* The saleae logic file output is with custom gpios for CS and CMD.

*I put "CONFIG_DK_LIBRARY=n" into the prj.conf but it still shows the conflict between pins.

*I changed to v2.61, but with no difference for now.

*Im still fairly new to the nrf and vscode, so im unsure how to get the logs? here are the output from the terminal:

RE: DevAcademy intermediate Lesson 5 Exercise 2 alternative RPi Display with nrf9161DK

Håkon Alseth — Wed, 09 Oct 2024 12:34:33 GMT

Hi,

Could you .zip the saleae logic file and share it here?

In the picture that you attached yesterday:

There are toggling on the MISO line, but with the resolution of the image, it is hard to say what is happening.

[quote user="EgilCL"]Should there be conflicting pin from this exercise?[/quote]

There can be an issue if you use the button. Ensure that CONFIG_DK_LIBRARY=n.

Is there any runtime logging that is printed when you run the firmware?

Are you using ncs v2.7.0 or v2.6.2? In v2.7.0, which is based on zephyr 3.6, the way to populate a display has changed:

https://github.com/nrfconnect/sdk-zephyr/blob/v3.6.99-ncs2/doc/releases/migration-guide-3.6.rst#display

Kind regards,

Håkon

RE: DevAcademy intermediate Lesson 5 Exercise 2 alternative RPi Display with nrf9161DK

EgilCL — Wed, 09 Oct 2024 10:49:47 GMT

some screenshots of the output:

The first 4 hex from mosi is: 0x36, 0x28, 0x3A, 0x66

RE: DevAcademy intermediate Lesson 5 Exercise 2 alternative RPi Display with nrf9161DK

EgilCL — Wed, 09 Oct 2024 10:15:30 GMT

Thx for taking your time to help me.

So i guess the first thing is to make sure the SPI works right?

So just to be sure, the example has the piunouts

SCK - P0.13

MISO - P0.12

MOSI - P0.11

cmd-data - P0.09

CS- P0.04

is this correct?

The base exercise should work out of the box sins it also has an overlay file dedicated to nrf9161?

Should there be conflicting pin from this exercise?

My board configuration is this:

The cmd-data pin is this one in the overlay file:

My pinout (i tried with both default pins and custom ones (CS and cmd)):

To answer your question: IRQ is connecting to VDD or GND, didnt know which would work, but with no luck for now.

RE: DevAcademy intermediate Lesson 5 Exercise 2 alternative RPi Display with nrf9161DK

Håkon Alseth — Tue, 08 Oct 2024 13:02:55 GMT

Hi Egil,

Can you share the zoomed in data and response from the board?

[quote user="EgilCL"]cmd-data to pin[/quote]

Which pin is this? Is this what is mapped to the "IRQ" pin on the 20-pin header?

Note that this is not a display that I have tried before, so I am quite blank in terms of how this maps to the header that you posted.

Is there any log output from the firmware that can help here?

Kind regards,

Håkon

RE: DevAcademy intermediate Lesson 5 Exercise 2 alternative RPi Display with nrf9161DK

EgilCL — Tue, 08 Oct 2024 11:40:14 GMT

Hi Håkon

Thx for the quick reply. I tried changing the setting "VDD for GNSS and LEDs" to 3.3V, it was on 3.0V before changing it.

But it is still not showing anything. I also tried to change the cmd-data to pin P0.03 and CS to pin P0.07 so there was no conflict with those pins, but still without any result.

When measuring the voltage on the pins: CS is 3.3V but cmd-data are only 0V no matter if i try the default pins or not.

The display only works with 5V, then trying 3.3V the display does not light up.

This is the output im getting when the display is connected, still only lights up white.

/Egil

RE: DevAcademy intermediate Lesson 5 Exercise 2 alternative RPi Display with nrf9161DK

Håkon Alseth — Tue, 08 Oct 2024 09:23:25 GMT

Hi,

By default, the nRF9161-DK is using 1.8V VDD GPIO voltage. This can be changed in the board configurator in nRF connect for desktop:

https://docs.nordicsemi.com/bundle/nrf-connect-board-configurator/page/updating.html

Could you try setting "VDD for GNSS and LEDs" to match the required voltage of your display (ie. 3.3V) and see if the display starts responding over SPI then?

Kind regards,

Håkon