View source for QT Py (RP2040 based)

[[file:QT Py RP2040.PNG]] [[file:XIAO-RP2040.PNG]]

== RP2040 QT Py ==

<video type="youtube">00t5y4nQlH8</video>

* [https://www.adafruit.com/product/4900 Adafruit QT Py RP2040 Product page] or [https://www.seeedstudio.com/XIAO-RP2040-v1-0-p-5026.html Seeed XIAO RP2040 Product page]
* USB Type C connector
* RP2040 32-bit Cortex M0+ dual-core
* Runs at ~125 MHz
* 264 KB RAM
* 8 MB SPI FLASH chip for storing files and CircuitPython/MicroPython code storage (Adafruit), 2 MB SPI Flash (Seeedstudio)
** No EEPROM
* Can be used with MicroPython or CircuitPython
* Built-in RGB NeoPixel LED
* 13 GPIO pins (11 breakout pads and two QT pads):
** Four 12 bit ADCs (one more than Pico)
** Two I2C ports (one on the QT connector, one on the breakout pads)
** SPI and UART peripherals, in standard QT Py locations,
** PWM outputs on every IO pin - for servos, LEDs, etc
** There are 6 GPIO in consecutive order for PIO compatibility
* 3.3V logic and power 600 mA
* Both Reset button and Bootloader select buttons for quick restarts (no unplugging-replugging to relaunch code)

== Pins (RP2040 version) ==

* Pins are different in MicroPython between Seeeduino XIA and Adafruit QT Py

=== Adafruit RP2040 ===

[https://www.adafruit.com/product/4900 Adafruit QT Py RP2040 Product page]

[[file:adafruit_products_qtpy-rp2040-pins.png]]

==== 3V ====

* Regulated output from the onboard regulator. You can draw 500mA

==== 5V ====

* 5v out from the USB port. 
* Voltage input
** Requires external diode
*** Schottky, signal, power
*** Between external power source and this pin
*** Cannot power the USB port by supplying 5V to this pin
**** There is a protection diode that prevents the 5V from reaching the USB connector. 
**** This is to protect host computer USB ports, etc.

==== A0 / D0 - Digital/analog GPIO pin 0 ====

* Digital I/O 0
* GPIO29 in MicroPython
* Analog In 0
* True analog output with 10 bit precision
* Does not have PWM
* Capacitive touch input.

==== A1 / D1 - Digital/analog GPIO pin 1 ====

* Digital I/O 1
* GPIO28 in MicroPython
* Analog In 1
* Capacitive touch input
* AREF pin.

==== A2 / D2 - Digital/analog GPIO pin 2 ====

* Digital I/O 2
* GPIO27 in MicroPython
* Analog In 2
* PWM
* Capacitive touch input.

==== A3 / D3 - Digital/analog GPIO pin 3 ====

* Digital I/O 3
* GPIO26 in MicroPython
* Analog In 3
* PWM output
* Capacitive touch input.

==== SDA / D4 ====

* Digital I/O 4
* I2C SDA pin
* PWM output
* GPIO24 in MicroPython
* No analog on this pin
* No pull up on this pin
* When using with I2C requires an external 2.2K-10K pullup to 3.3V. 

==== SCL / D5 ====

* Digital I/O 5
* I2C SCL
* GPIO25 in MicroPython
* No analog on this pin
* No pull up on this pin
* When using with I2C requires an external 2.2K-10K pullup to 3.3V. 

==== TX / A6 / D6 ====

* Digital I/O 6
* Transmit (output) for Serial1 
* GPIO20 in MicroPython
* Analog 6
* PWM output
* Capacitive touch input

==== RX / A7 / D7 ====

* Digital I/O 7
* Receive (input) for Serial1 
* GPIO5 in MicroPython
* Analog 7
* PWM output
* Capacitive touch input

==== SCK / A8 / D8 ====

* Digital I/O 8
* SPI SCK pin
* GPIO6 in MicroPython
* Analog 8
* PWM output

==== MISO / A9 / D9 ====

* Digital I/O 8
* SPI MISO pin 
* GPIO4 in MicroPython
* Analog 8
* PWM output

==== MOSI / A10 / D10 ====

* Digital I/O 10
* SPI MOSI pin
* GPIO3 in MicroPython
* Analog 10
* PWM output

==== NeoPixel ====

* NEOPIXEL LED Features
** Individually addressable and programmable RGB LEDs
** Operating voltage: 3.3V to 5V
** Power consumption: 60mA per LED at full brightness
** Communication: PWM through data pin  
** Driver IC: WS2812
* Data = Pin 11
* Power = Pin 12 - set low for low power usage
* By default pin 12 is set high by Arduino/CircuitPython
* [https://learn.adafruit.com/adafruit-qt-py-2040/built-in-neopixel-led NeoPixel Code example]

<pre>
import board
import neopixel

pixels = neopixel.NeoPixel(board.NEOPIXEL, 1)
# fill((rVal, gVal, bVal))
# rVal, gVal, bVal = red/green/blue values (0-255)
pixels.fill((255, 0, 0))  # Note double parens
</pre>

=== Seeeduino RP2040 ===

There are 14 GPIO PINs on XIAO RP2040, on which there are 11 digital pins, 4 analog pins, 11 PWM Pins,1 I2C interface, 1 UART interface, 1 SPI interface, 1 SWD Bonding pad interface.

* [https://www.seeedstudio.com/XIAO-RP2040-v1-0-p-5026.html Seeed XIAO RP2040 product page]
* [https://wiki.seeedstudio.com/XIAO-RP2040/ Seeed XIAO RP2040 wiki page]

[[file:seeed-xinpin-rp2040.jpg]]

==== 3V ====

* Regulated output from the onboard regulator. You can draw 500mA

==== 5V ====

* 5v out from the USB port. 
* Voltage input
** Requires external diode
*** Schottky, signal, power
*** Between external power source and this pin
*** Cannot power the USB port by supplying 5V to this pin
**** There is a protection diode that prevents the 5V from reaching the USB connector. 
**** This is to protect host computer USB ports, etc.

==== A0 / D0 / P26 - Digital/analog GPIO pin 0 ====

* board.D0
* board.A0
* P26 in Arduino/MicroPython
* True analog output with 10 bit precision
* PWM output

==== A1 / D1 / P27 - Digital/analog GPIO pin 1 ====

* board.D1
* board.A1
* P27 in Arduino/MicroPython
* PWM output

==== A2 / D2 / P28 - Digital/analog GPIO pin 2 ====

* board.D2
* board.A2
* P28 in Arduino/MicroPython
* PWM output

==== A3 / D3 / P29 - Digital/analog GPIO pin 3 ====

* board.D3
* board.A3
* P29 in Arduino/MicroPython
* PWM output

==== SDA / D4 / P6 ====

* board.D4
* P6 in Arduino/MicroPython
* I2C SDA pin
* PWM output
* No pull up on this pin
* When using with I2C requires an external 2.2K-10K pullup to 3.3V.

==== SCL / D5 / P7 ====

* board.D5
* P7 in Arduino/MicroPython
* I2C SCL
* No pull up on this pin
* When using with I2C requires an external 2.2K-10K pullup to 3.3V
* PWM output

==== TX / D6 / P0 ====

* board.D6
* Transmit (output) for Serial1 
* P0 in Arduino/MicroPython
* PWM output

==== RX / D7 / P1 / P2 ====

* board.D7
* Receive (input) for Serial1 
* P1 in Arduino/MicroPython
* PWM output

==== SCK / D8 ====

* board.D8
* SPI SCK pin
* P2 in Arduino/MicroPython
* PWM output

==== MISO / D9 / P4 ====

* board.D8
* SPI MISO pin 
* P4 in Arduino/MicroPython
* PWM output

==== MOSI / D10 / P3 ====

* board.D10
* SPI MOSI pin
* P3 in Arduino/MicroPython
* PWM output

==== On-board LEDs ====

[[file:XIAO_LEDs_xinfront-720px.jpg]]

* Red Power LED
* USER LED (RGB)
** RED - P17
** GRN - P16
*** LED_BUILTIN in Arduino
** BLU - P25
** [https://github.com/land-boards/lb-Arduino-Code/tree/master/LBCards/QTPyRP2040/Blink3 Code to Blink 3 LEDs]
* NEOPIXEL LED Features
** Individually addressable and programmable RGB LEDs
** Operating voltage: 3.3V to 5V
** Power consumption: 60mA per LED at full brightness
** Communication: PWM through data pin  
** Driver IC: WS2812
** NEOPIXEL Power - P11 - set low for low power usage
** NEOPIXEL Data - P12
** [https://github.com/land-boards/lb-Arduino-Code/tree/master/LBCards/QTPyRP2040/NEOPIXEL_Demo NEOPIXEL Demo]

== Programming ==

* C/C++
* CircuitPython
* MicroPython

=== C/C++ ===

* Can program in C/C++ using
** Arduino IDE
** Pico C++ SDK

==== C/C++ Adafruit RP2040 ====

* [https://learn.adafruit.com/adafruit-qt-py-2040/arduino-ide-setup Arduino IDE Setup]
* Add the URL to the the Additional Boards Manager URLs
<pre>
https://github.com/earlephilhower/arduino-pico/releases/download/global/package_rp2040_index.json
</pre>
* Tools > Board > Boards Manager
* Search for RP2040
* Scroll down to the Raspberry Pi Pico/RP2040 by Earle F Philhower, III entry
* Click Install to install it
* Tools > Boards menu
* Navigate to the Raspberry Pi RP2040 Boards menu and choose Adafruit QT Py RP2040

==== C/C++ Seeeduino RP2040 - Arduino ====

* [https://wiki.seeedstudio.com/XIAO-RP2040-with-Arduino/ Arduino IDE Setup for Seeeduino RP2040 version]
** Requires Arduino IDE version 1.8 or higher
** Add the URL to the the Additional Boards Manager URLs
<pre>
https://files.seeedstudio.com/arduino/package_seeeduino_boards_index.json
</pre>
* [https://github.com/land-boards/lb-Arduino-Code/tree/master/LBCards/QTPyRP2040 Arduino Repository]

==== C/C++ RP2040 ====

* [https://github.com/raspberrypi/pico-sdk RP2040 C/C++ SDK]

=== CircuitPython ===

* [https://circuitpython.readthedocs.io/en/latest/README.html CircuitPython] is a derivative of [https://github.com/micropython/micropython/tree/master/ports/rp2 MicroPython]
* [https://learn.adafruit.com/welcome-to-circuitpython Welcome To CircuitPython] - Adafruit tutorial
* Autorun code - CircuitPython looks for a code file on the board to run
** There are four options: code.txt, code.py, main.txt and main.py
** CircuitPython looks for those files, in that order, and then runs the first one it finds
* [https://codewith.mu/ Mu code editor]
** [https://codewith.mu/en/download Mu editor download]

==== CircuitPython for Adafruit QT Py RP2040 ====

* [https://learn.adafruit.com/adafruit-qt-py-2040 Adafruit QT Py RP2040 Overview]
* [https://learn.adafruit.com/adafruit-qt-py-2040/circuitpython-essentials CircuitPython Essentials]
* [https://learn.adafruit.com/adafruit-qt-py-2040/circuitpython CircuitPython for Adafruit QT Py RP2040]

===== Install CircuitPython on Adafruit QT Py RP2040 =====

* [https://circuitpython.org/board/adafruit_qtpy_rp2040/ Adafruit CircuitPython Download page]
** Running v7.3.0
* Hold down the BOOT (right) button while plugging it into USB
* Download [https://circuitpython.org/board/adafruit_qtpy_rp2040/ UF2 from Adafruit QT Py CircuitPython RP2040]
* Drive will open
* Drop UF2 onto drive
* Blink program
** [https://github.com/adafruit/Adafruit_Learning_System_Guides/blob/master/Welcome_to_CircuitPython/QT_Py_blink.py QT_Py_blink.py]

===== Updating CircuitPython on Adafruit QT Py RP2040 =====

* Save the contents of CIRCUITPY, just in case
* '''Double-click the reset button''' to show the BOOT drive
* Drag the update-bootloader .uf2 file to the BOOT drive
* Wait a few tens of seconds for the bootloader to update; the BOOT drive will reappear
* Check INFO_UF2.TXT to verify that the bootloader version has been updated. Then you will need to reload CircuitPython.
* [http://adafru.it/mpy-update Update mpy files]

==== CircuitPython for Seeed XIAO RP2040 ====

* [https://wiki.seeedstudio.com/XIAO-RP2040-with-CircuitPython/ XIAO RP2040 with CircuitPython]
* [https://github.com/land-boards/QT-Py/tree/main/CircuitPython/Seeed_XIAO_RP2040 Our GitHub repo]
* Use [https://thonny.org/ Thonny IDE]
** Left click bottom right corner
** Select CircuitPython (generic)
** Left click bottom right corner
** Select Configure Interpreter
** Select USB Serial Device (COM<x)
* Pins list

<pre>
import board
dir(board)
['__class__', '__name__', 'A0', 'A1', 'A2', 'A3', 'D0', 'D1', 'D10', 'D2', 'D3', 'D4', 'D5', 'D6', 'D7', 'D8', 'D9', 'I2C', 'LED', 'LED_BLUE', 'LED_GREEN', 'LED_RED', 'MISO', 'MOSI', 'NEOPIXEL', 'NEOPIXEL_POWER', 'RX', 'SCK', 'SCL', 'SDA', 'SPI', 'TX', 'UART', 'board_id']
</pre>

===== Install CircuitPython on Seeed XIAO RP2040 =====

* Long press the "BOOT" button. (The "B" is written on the board shown to the right)
* Connect the XIAO PR2040 to your computer while you still pressing the button.
* The computer then will appear a disk driver(RP1-RP2)
* Download the [https://files.seeedstudio.com/wiki/XIAO-RP2040/res/XIAO-RP2040-CircuitPython.uf2 XIAO-RP2040-CircuitPython.uf2 file] for XIAO RP2040
* Drag the .uf2 file to the disk driver("RP1-RP2")
* Check the disk drive if the name has changed to "CIRCUITPY" (takes a few seconds)
* Free memory

<pre>
>>> import gc
>>> gc.mem_free()
208128
>>> import time
>>> gc.mem_free()
207952
</pre>

=== MicroPython ===

* [https://github.com/micropython/micropython/tree/master/ports/rp2 RP2040 MicroPython Repo]
* [https://thonny.org/ Thonny Editor]

==== MicroPython on XIAO RP2040 ====

* [https://wiki.seeedstudio.com/XIAO-RP2040-with-MicroPython/ XIAO RP2040 with MicroPython]
* Software Setup
# Download and Install the latest version of Thonny editor according to your operating system
# Launch the Thonny IDE
# Click "Tools→Options" to open the settings.
# Step 4. Chose the "Interpreter" interface and select the device as "MicroPython(Raspberry Pi Pico)" and the port as "Try to detect prot automatically"
# Press and hold the "BOOT" button and then connect the XIAO RP2040 to the PC through the Type-C cable. If it works well, there is an "RPI-RP2" desk shown on the PC.
# Press the "Stop/Restart Backend" button and there will be a pop-up window that helps you install the MicroPython firmware on the board. The XIAO RP2040 uses the same chip as the Raspberry Pi Pico, thereby the XIAO RP2040 is compatible with Pico's MicroPython files.
# Write code ([https://files.seeedstudio.com/wiki/XIAO-RP2040/img/micropython/ws2812.py Neopixel example])
#  Upload the codes by clicking the "Run current script" button. For the first time, Thonny will ask where you want to save your codes file. Both This Computer and Raspberry Pi Pico are fine.

==== Digital I/O Example ====

* [https://learn.adafruit.com/adafruit-qt-py-2040/blink Blink on Adafruit QT Py RP2040]

<pre>
import board
import digitalio
import time

led = digitalio.DigitalInOut(board.D13)
led.direction = digitalio.Direction.OUTPUT

while True:
    led.value = True
    time.sleep(0.1)
    led.value = False
    time.sleep(0.5)
</pre>

==== Land Boards CircuitPython Code ====

* [https://learn.adafruit.com/circuitpython-essentials/circuitpython-i2c I2C scanner]

===== I2CIO-8 (MCP23008) Drivers =====

* [https://github.com/land-boards/lb-boards/tree/master/Projects/QTPy/Land%20Boards/Land%20Boards%20QT%20Py%20Code GitHub Repo]
** [https://github.com/land-boards/lb-boards/blob/master/Projects/QTPy/Land%20Boards/Land%20Boards%20QT%20Py%20Code/I2CIO8.py I2CIO8.py Demo code] - Bounce an LED across MCP23008 card output pins
** [https://github.com/land-boards/lb-boards/blob/master/Projects/QTPy/Land%20Boards/Land%20Boards%20QT%20Py%20Code/I2CIO8_RW.py I2CIO8_RW.py] - Read jumpers, write back LEDs

===== SWLEDX8-I2C (MCP23017) Drivers =====

* [https://github.com/land-boards/lb-boards/blob/master/Projects/QTPy/Land%20Boards/Land%20Boards%20QT%20Py%20Code/SWLEDX8.py SWLEDX8.py] = Control the [[SWLEDX8-I2C]] card

===== PROTO16-I2C (MCP23017) Drivers =====

* [https://github.com/land-boards/lb-boards/blob/master/Projects/QTPy/Land%20Boards/Land%20Boards%20QT%20Py%20Code/PROTO16_Blink.py PROTO16_Blink.py] - Control the [[PROTO16-I2C]] card

== QT Py Breakout Board ==

[[File:QT_Py_Breakout_P18212-720px.jpg]]

* Built onto [[GRID49]] card
* Socket for QT Py
* QT Py pins brought to header strips
* 3.3V power distribution on 2x8 header

=== Pins (CCW direction) ===

* S12 = A0
* R12 = A1
* Q12 = A2
* P12 = A3
* N12 = SDA
* M12 = SCL
* L12 = TX
* L1 = RX
* M1 = SCK
* N1 = MI
* P1 = MO
* Q1 = 3.3V
* R1 = GND
* S1 = 5V
* A6=B6=C6=D6=E6=F6=G6=H6 = GND
* A7=B7=C7=D7=E7=F7=G7=H7 = 3.3V

== QTPy49 Board ==

* [[QTPy49]]

[[FILE:QTPy49_FRONT_REV1.png]]

== Videos ==

<video type="youtube">qfbPyu_1L18</video>

<video type="youtube">sfC1msqXX0I</video>

<video type="youtube">00t5y4nQlH8</video>