HOW TO IMPLEMENT I2C WITH NRF PRODUCT

RE: HOW TO IMPLEMENT I2C WITH NRF PRODUCT

Obaid Mufiz — Mon, 11 Nov 2024 12:18:38 GMT

So for starters, I tried using the same code you linked above & in that I don't see any overlay file for nrf7002dk. So I made one myself with the content you had provided in your overlay file screenshot.
But when I build the application its throwing error: FATAL ERROR: command exited with status 1: 'C:\ncs\toolchains\ce3b5ff664\opt\bin\cmake.EXE' -DWEST_PYTHON=C:/ncs/toolchains/ce3b5ff664/opt/bin/python.exe '-Bc:\Users\FCI\Desktop\i2c\build' -GNinja -DBOARD=nrf7002dk/nrf5340/cpuapp -DNCS_TOOLCHAIN_VERSION=NONE -DCONF_FILE=prj.conf '-Sc:\Users\FCI\Desktop\i2c'

I've setup everything very similar to yours.

RE: HOW TO IMPLEMENT I2C WITH NRF PRODUCT

overflow — Mon, 11 Nov 2024 12:09:28 GMT

What's the problem you're facing?

I think, for my case, I wasn't able to find my i2c address, the problem was input voltage was not enough for my i2c device, that's all.

RE: HOW TO IMPLEMENT I2C WITH NRF PRODUCT

Obaid Mufiz — Mon, 11 Nov 2024 10:43:47 GMT

Hello there,
I'm in a bit of a similar situation.
I'm trying to integrate LIS2dw12 accelerometer with nrf7002dk.
Can you tell me what finally worked in your case?

Thanks & Regards,

Obaid

RE: HOW TO IMPLEMENT I2C WITH NRF PRODUCT

AHaug — Mon, 30 Oct 2023 07:12:35 GMT

Happy to hear that!

I will be closing this case now :) Please feel free to open a new one if you have new questions
Kind regards,
Andreas

RE: HOW TO IMPLEMENT I2C WITH NRF PRODUCT

overflow — Fri, 27 Oct 2023 15:15:46 GMT

Alright, all things work now, problem slove.

Thank you!

RE: HOW TO IMPLEMENT I2C WITH NRF PRODUCT

AHaug — Thu, 26 Oct 2023 08:52:54 GMT

That also works

In this case VDD becomes 3.6V, which is also maximum for IOVDD on the 7002

Kind regards,
Andreas

RE: HOW TO IMPLEMENT I2C WITH NRF PRODUCT

overflow — Wed, 25 Oct 2023 10:01:59 GMT

Instead of apply an external voltage, I used the VBAT MEAS pin, I don't know if it's a good things to do but Now I can find all my I2C address devices.

PS: I don't have external PSU actually.

RE: HOW TO IMPLEMENT I2C WITH NRF PRODUCT

AHaug — Wed, 25 Oct 2023 08:06:27 GMT

Hi,

You will need an additional power supply and you can connect the AHT20 Adafruit as this

Edit, I see that you've removed your reply asking for how to connect the board after I posted this, so let me know if there are any questions related to this after all

Kind regards,
Andreas

RE: HOW TO IMPLEMENT I2C WITH NRF PRODUCT

overflow — Wed, 25 Oct 2023 01:40:21 GMT

Thank you for your recommendation.

As indicated in my schematic, it's important to note that I've connected the sensor to the 5V pin, rather than VDD(1.8V). I just verified it with multimeter.

RE: HOW TO IMPLEMENT I2C WITH NRF PRODUCT

AHaug — Tue, 24 Oct 2023 13:28:03 GMT

Noted.

Let me know if you're able to resolve it by following the suggestions and making sure the voltage is within the operating range of the device and within what the nRF can supply.

Kind regards,
Andreas

RE: HOW TO IMPLEMENT I2C WITH NRF PRODUCT

overflow — Tue, 24 Oct 2023 13:18:40 GMT

I'm using the AHT20 module from adafruit.

RE: HOW TO IMPLEMENT I2C WITH NRF PRODUCT

AHaug — Tue, 24 Oct 2023 13:00:52 GMT

Noted, no thats fine. I just wanted to check what you had done.

Are you using the AHT20 module from here https://cdn-learn.adafruit.com/downloads/pdf/adafruit-aht20.pdf, or your own custom board with the sensor https://files.seeedstudio.com/wiki/Grove-AHT20_I2C_Industrial_Grade_Temperature_and_Humidity_Sensor/AHT20-datasheet-2020-4-16.pdf?

As I stated the 7002DK only supplies 1.8v by default unless you make any modifications.

VIO_ref will change the voltage on the onboard regulator to what is given in on VIO_ref. This will change the voltage on VDD from 1.8V to the voltage you have on VIO_ref on the nRF5340 + IOVDD on nRF7002

Kind regards,
Andreas

RE: HOW TO IMPLEMENT I2C WITH NRF PRODUCT

overflow — Tue, 24 Oct 2023 10:55:07 GMT

Hi,

I connect both sensors on the 5V pin of the DK, or I'm not sure to understand you.

RE: HOW TO IMPLEMENT I2C WITH NRF PRODUCT

AHaug — Tue, 24 Oct 2023 10:48:30 GMT

Hi,

Thank you for supplying that. The part of the code I was interested in looks fine.

Moving on to the next thing. Have you checked the operating conditions of the sensors against the DK you are using? Both of your sensors have a minimal operation voltage (2v and 2.3v) that is higher than what the 7002DK supplies (1.8v), meaning that they are incompatible without modifications (which is also stated in the 7002DK specification).

If you've checked this and done the modifications, can you state what you've done so I can cross examine them?

Kind regards,
Andreas

RE: HOW TO IMPLEMENT I2C WITH NRF PRODUCT

overflow — Mon, 23 Oct 2023 23:27:46 GMT

devzone.nordicsemi.com/.../fund_5F00_less6_5F00_exer1.zip

This is the zip of the porject

RE: HOW TO IMPLEMENT I2C WITH NRF PRODUCT

AHaug — Mon, 23 Oct 2023 12:32:09 GMT

You can drag your zip into a comment and it will attach

Or you can use the insert image/video/file function

Kind regards,
Andreas

RE: HOW TO IMPLEMENT I2C WITH NRF PRODUCT

overflow — Mon, 23 Oct 2023 11:06:38 GMT

The link https://github.com/crfosse/ncs_projects/tree/main/peripheral_zephyr/i2c

How can I send my zip project here?

RE: HOW TO IMPLEMENT I2C WITH NRF PRODUCT

AHaug — Mon, 23 Oct 2023 10:32:25 GMT

Hi,

Please send a full link and preferably also zip your project if you wish for any input

Kind regards,
Andreas

RE: HOW TO IMPLEMENT I2C WITH NRF PRODUCT

overflow — Mon, 23 Oct 2023 10:17:32 GMT

Hi,

I use this code github.com/.../i2c

RE: HOW TO IMPLEMENT I2C WITH NRF PRODUCT

AHaug — Mon, 23 Oct 2023 08:06:56 GMT

Hi,

I see now that you're using the 7002DK and you've relied on the 5340 SoC doc. For the nRF7002DK you can use https://infocenter.nordicsemi.com/pdf/nRF7002_DK_User_Guide_v1.0.0.pdf as a reference doc

Regarding your diagram and dts everything looks correct. As long as there are nothing else using the pins you've selected and you've instanced and initialized your I2C coms correct, this should be working.

Could you post your code as well?

Kind regards,
Andreas

RE: HOW TO IMPLEMENT I2C WITH NRF PRODUCT

overflow — Thu, 19 Oct 2023 12:01:42 GMT

I thought about all these alternatives, checked the forum (you have topics that are old), I did some research on the internet in general (I don't find many issue as other board), I discussed with people more advanced than me, but I did not have a favorable response. I just don't sit and wait for a response, when I come here it's a last resort, since I've exhausted the little resources I have.

For arduino, It's just to make sure that my sensor actually works, not a comparison with other board.

Overlay File

Diagram

I don't have logic analyser, I think I'll Buy it.

Thanks

RE: HOW TO IMPLEMENT I2C WITH NRF PRODUCT

AHaug — Thu, 19 Oct 2023 09:13:44 GMT

Hi,

A few items regarding your experiences regarding the time this has taken

Response time will vary from time to time. In this case a solution has been presented in form of the I2C academy course, but we keep the case open to help you get to your goal.
Arduino, which is meant for learning microcontrollers and electronics, is unfortunately a big leap away from embedded developing and computing and you will have to spend some time to bridge the gap between these areas of the field. In arduino you can do 'sensor.available()' and everything magically works, while in embedded developing you will have to do some more configurations
You can also search the forum for similar open cases and find information for how to configure I2C there
The Zephyr discord community is also a support forum that contains input and tips regarding how to use peripherals

Now regarding your other issue

Can you provide a small diagram to show how you've connected your sensor to the DK they are working with
Can you share your overlay, prj.conf, and main file, so that we may take a closer look
Do you have access to a logic analyser you can use to debug and check the lines?

Let me know about these three last items and we'll see what we can do for you.

Kind regards,
Andreas

RE: HOW TO IMPLEMENT I2C WITH NRF PRODUCT

overflow — Wed, 18 Oct 2023 19:09:41 GMT

Can someone help me please.

It's quite frustrating to know that I can't get help with my i2c problem, I'm not making any progress in learning, can anyone help me please? I've already wasted enough time with your products.

RE: HOW TO IMPLEMENT I2C WITH NRF PRODUCT

overflow — Tue, 17 Oct 2023 09:55:14 GMT

Sorry, Finally I was wrong, I can't found my aht20 i2c device, my nrf i2c@9000 controller seen a 0x38 address with and without any device cause of this overlay propertie(reg = < 0x38 >;), so this not work for me. I've anable internal Pull-upps resistors still not working, i've disable internall pull-upps and use external 10kohm resistors for the both line still not working. I can corfim that this adafruit aht20 sensor work smoothly with my arduino mkr1000 device. I hope you'll help please :)

Arduino Board

RE: HOW TO IMPLEMENT I2C WITH NRF PRODUCT

AHaug — Wed, 11 Oct 2023 12:29:51 GMT

Hi,

Great! Glad to hear that you were able to solve it with the information in the course! If you have any

Please feel free to open new tickets in the future if you have any other questions and/or see any new issues and we will try to help you to our best abilities

Kind regards,
Andreas