Adafruit Qt Py

The Adafruit QtPy is a tiny ARM development board based on the Atmel ATSAMD21E18 family of SoC.

Interfaces

Interface Hardware Supported TinyGo Support
GPIO YES YES
UART YES YES
SPI YES YES
I2C YES YES
ADC YES YES
PWM YES YES
USBDevice YES YES

Pins

Pin Hardware pin Alternative names PWM
D0 PA02 A0
D1 PA03 A1
D2 PA04 A2 TCC0 (channel 0)
D3 PA05 A3 TCC0 (channel 1)
D4 PA16 A4, SDA_PIN TCC2 (channel 0), TCC0 (channel 2)
D5 PA17 SCL_PIN TCC2 (channel 1), TCC0 (channel 3)
D6 PA06 UART_TX_PIN TCC1 (channel 0)
D7 PA07 UART_RX_PIN TCC1 (channel 1)
D8 PA11 SPI0_SCK_PIN TCC1 (channel 1), TCC0 (channel 3)
D9 PA09 SPI0_SDI_PIN TCC0 (channel 1), TCC1 (channel 3)
D10 PA10 SPI0_SDO_PIN, I2S_SCK_PIN TCC1 (channel 0), TCC0 (channel 2)
D11 PA18 NEOPIXELS, WS2812 TCC0 (channel 2)
D12 PA15 NEOPIXELS_POWER TCC0 (channel 1)
D13 PA27
D14 PA23 TCC0 (channel 1)
D15 PA19 TCC0 (channel 3)
D16 PA22 TCC0 (channel 0)
D17 PA08 I2S_SD_PIN TCC0 (channel 0), TCC1 (channel 2)
USBCDC_DM_PIN PA24 TCC1 (channel 2)
USBCDC_DP_PIN PA25 TCC1 (channel 3)

Machine Package Docs

Documentation for the machine package for the Adafruit QtPy

Flashing

UF2

The QtPy comes with the UF2 bootloader already installed.

CLI Flashing

  • Plug your QtPy into your computer’s USB port.

  • Flash your TinyGo program to the board using this command:

    tinygo flash -target=qtpy [PATH TO YOUR PROGRAM]
    
  • The QtPy board should restart and then begin running your program.

Troubleshooting

If you have troubles getting your QtPy board to receive code, try this:

  • Press the “RESET” button on the board two times to get the QtPy board ready to receive code.

  • The QtPy board will appear to your computer like a USB drive.

  • Now try running the tinygo flash command as above:

    tinygo flash -target=qtpy [PATH TO YOUR PROGRAM]
    

Once you have updated your QtPy board the first time, after that you should be able to flash it entirely from the command line.

Notes

You can use the USB port to the QtPy as a serial port. UART0 refers to this connection.