Drivers for Qwiic & StemmaQT boards?

[jphastings]

I have a number of Qwiic & StemmaQT boards that I'd be interested in getting working with Tinygo. I've not built any drivers before, but I may try and build them if I can't find them!

I'll update this issue with what I find as I go, but I'd appreciate pointers to drivers that already exist, or new Qwiic/StemmaQT boards that you already know work.

(If you'd also like a driver for one of these boards, please just 👍 on this issue, rather than post a comment 😊)

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I'm testing with a QT Py RP2040.

Company	Board Name	I2C Chip	Purpose	Existing driver	Testing notes
Elechouse	NFC module v3	NXP PN532	NFC reader	3rd party driver	Working example
Adafruit	STEMMA MiniGPS	PA1010D	Geographic location	Official driver	Working example
Adafruit	NeoDriver	ATtiny1616 buffering WS2812	RGB LED strip driver	Possible official driver?	Not tried yet
Adafruit	IS31FL3741	IS32FL3741	LED Matrix	Similar board driver	Not tried yet
Adafruit	ST25DV16	ST25DV16K	NFC tag emulator (ish)	no driver?
Adafruit	LTR-329	LTR-329ALS-01	Light sensor	no driver?
Adafruit	Rotary Encoder	SeeSaw	Rotary encoder & LED	Possible official driver?	I've opened #771 to add official support
Adafruit	Infineon Trust M	Infineon OPTIGA TRUST M SLS 32AIA	Crypto functions & key store	no driver?
Sparkfun	Qwiic Button	ATTiny84 running Sparkfun code	Button & LED	no driver?
Sparkfun	Qwiic Alphanumeric Display	vk16k33	4 letter display	no driver?
Sparkfun	Micro Magnetometer (Qwiic)	MMC5983MA	Magnetometer/Compass	no driver?

(Places I've looked: Official drivers, Periph drivers — code & issues/PRs, Github & searching the internet.)

(Ideally this would be a Github Discussion thread, but they don't seem to be enabled here!)

[conejoninja]

Hello, I like this, nice initiative, I might be able to help if I get some of the boards.

Qwiic & StemmaQT is just the connector for I2C, you need to look for the specific chip on those boards.

• Rotary encoder is using the adafruit's seesaw firmware -Adafruit seesaw is a near-universal converter framework- , there's already a driver for it ( tinygo.org/x/drivers/seesaw ), some modification might be needed to work with the rotary encoder

• The Qwiic button uses a similar library (in a sense), here's the C/Arduino library you can use as a base : https://github.com/sparkfun/SparkFun_Qwiic_Button_Arduino_Library

• Qwiic alphanumeric display uses a vk16k33 led driver

• neopixel is ws2812 driver

[jphastings]

Thanks @conejoninja! I've added your information into my table, and created a column for the I2C chip driving each of these boards (great pointer) — hopefully I'll get some time over the next week or two to try out the rotary encoder & the qwiic button (which seems simple enough it should be a great starter driver project for me!)

[jphastings]

I ended up getting a job (!), so didn't have time time to continue this earlier this year, but I recently discovered that the TinyGo GPS driver works with e PA1010D if you use the correct i2c address. I've opened a PR to provide easy use of it. I'll keep going with the other devices when I find a spare moment!

To be honest, I'm currently very motivated to get the MMC5983MA magnetometer working, so that's likely to be the next one!

[jphastings]

✅ The PA1010D is now supported by the official drivers!

👀 I've opened a PR adding rotary encoder support to the official seesaw package

👨‍💻 I've built a mostly functional package for the MMC5983 magnetometer (just debugging why the readings don't seem right; expect a PR soon)

🚀If anyone has any recommendations or requests for Qwiic/Stemma QT boards I'll be happy to try and get them working/build packages. (I'll even buy one of the breakout boards if I like the functionality of the board!)