Adafruit Qt Py

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

Interfaces

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)

The QtPy comes with the UF2 bootloader already installed.

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.

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.

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