Any easy way to make it work with an Adafruit QT Py RP2040?

[kkardashian]

I thought they were the same..

[sheffieldnikki]

The Adafruit product page claims it is size- and pinout compatible with the Seeed XIAO RP2040, and the microcontroller is obviously the same. So it should just be a drop-in replacement, no changes required?
https://www.adafruit.com/product/4900

[kkardashian]

According to gemini, while they're electronically identical, their internal GPIO mappings are different and the code would need to be modified.

The LEDs are now working, calibration also runs down internally, but there's no input on the computer side, cat /dev/ttyACM0 says

ERROR : Cannot read consistent data from device 'TLx493D_A2B6' !
X:0.00
Y:0.00
Z:0.00
Rx:0.00
Ry:0.00
Rz:0.00
btn:0
hid:0

This is the relevant section of my config.h that seems incorrect:

const int PIN_RIGHT_BTN = A0;
const int PIN_LEFT_BTN = A2;
const int PIN_LED_DATA = A3;
const int PIN_LED_LS = A1;
const int PIN_MAG1_LS = D10;
const int PIN_MAG2_LS = D9;
const int PIN_MAG3_LS = D8;

[Spotler-Kevin]

The pin names A0, A1, D10, etc, are references to the RP2040 pin numbers (on the processor). If you've selected the correct board within PlatformIO for example, then the A* and D* references will align themselves. Another option is the use the two pinout documents to define the GPIO numbers from the 2040.

For example.

// Xaio RP2040
const int PIN_RIGHT_BTN = 26 // A0;
const int PIN_LEFT_BTN = 28 // A2;
const int PIN_LED_DATA = 29 // A3;

// QT Py RP2040
const int PIN_RIGHT_BTN = 29 // A0;
const int PIN_LEFT_BTN = 27 // A2;
const int PIN_LED_DATA = 26 // A3;

These two are all you should need to match up the pin numbers.
https://wiki.seeedstudio.com/XIAO-RP2040/
https://learn.adafruit.com/adafruit-qt-py-2040/pinouts

[RaveGun]

I did the same mistake, I did not realized I had the QT PY and not the XIAO one.
Once I started debugging I found out my mistake.

I already changed the pin configuration in the config.h but the major difference is the I2C.
The LEDs are working and I did not tested the buttons.

What is the correct platformio.ini device definition for the QtPy?
I changed the I2C somewhere in the Arduino framework but I still do not have any I2C communication.

Did anyone managed to make it work?
Thank you.

[kkardashian]

This is what I have:

❯ cat platformio.ini 
; PlatformIO Project Configuration File
;
;   Build options: build flags, source filter
;   Upload options: custom upload port, speed and extra flags
;   Library options: dependencies, extra library storages
;   Advanced options: extra scripting
;
; Please visit documentation for the other options and examples
; https://docs.platformio.org/page/projectconf.html


[platformio]
src_dir = firmware/src
include_dir = firmware/include
lib_dir = firmware/lib
data_dir = firmware/data
test_dir = firmware/test

;[env:seeed_xiao_rp2040]
;platform = https://github.com/Seeed-Studio/platform-seeedboards.git
;board = seeed-xiao-rp2040

[env:adafruit_qtpy_rp2040]
platform = https://github.com/maxgerhardt/platform-raspberrypi.git
board = adafruit_qtpy

framework = arduino
board_build.core = earlephilhower
board_build.arduino.earlephilhower.usb_product = CAD Mouse MK2

build_flags = 
        -DUSE_TINYUSB
lib_deps = 
        infineon/XENSIV 3D Magnetic Sensor TLx493D@^1.1.0
        bxparks/AceButton@^1.10.1
        adafruit/Adafruit NeoPixel@^1.12.3

The buttons and LEDs are working (as in I can restart calibration) but the data coming back is useless and as a mouse, still not functioning.

[RaveGun]

This is what I have:
...
[env:adafruit_qtpy_rp2040]
platform = https://github.com/maxgerhardt/platform-raspberrypi.git
board = adafruit_qtpy

Thank you for the feedback.

I changed the Config.h like this:

const int PIN_RIGHT_BTN = A0;
const int PIN_LEFT_BTN = A2;
const int PIN_LED_DATA = A3;
const int PIN_LED_LS = A1;
const int PIN_MAG1_LS = MOSI;
const int PIN_MAG2_LS = MISO;
const int PIN_MAG3_LS = SCK;

And now I am on the same situation as you.

It does something in Spacenav but I am not sure what to expect, never used one before.