Arduino Zero

The Arduino Zero is a very small ARM development board based on the Atmel SAMD21 family of processors.

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
D0 PA11 I2S_WS_PIN, UART_RX_PIN
D1 PA10 I2S_SCK_PIN, UART_TX_PIN
D2 PA14
D3 PA09
D4 PA08
D5 PA15
D6 PA20
D7 PA21
D8 PA06
D9 PA07 I2S_SD_PIN
D10 PA18
D11 PA16 SPI0_SDO_PIN
D12 PA19 SPI0_SDI_PIN
D13 PA17 LED, LED1, SPI0_SCK_PIN
AREF PA03
ADC0 PA02
ADC1 PB08
ADC2 PB09
ADC3 PA04
ADC4 PA05
ADC5 PB02
LED2 PA27
LED3 PB03
SPI1_SDO_PIN PB10
SPI1_SDI_PIN PA12
SPI1_SCK_PIN PB11
SDA_PIN PA22
SCL_PIN PA23
USBCDC_DM_PIN PA24
USBCDC_DP_PIN PA25
XIN32 PA00
XOUT32 PA01

Machine Package Docs

Documentation for the machine package for the Arduino Zero

Installing BOSSA

In order to flash your TinyGo programs onto the Arduino Zero board, you will need to install the “bossac” command line utility which is part of the BOSSA command line utilities.

macOS

You can use Homebrew to install the BOSSA command line interface by using the following command:

brew install bossa

Or if you prefer, you can also download the installer from https://github.com/shumatech/BOSSA/releases/download/1.9.1/bossa-1.9.1.dmg

Once you have downloaded it, double click on the .dmg file to perform the installation.

Linux

On Linux, install from source:

sudo apt install libreadline-dev libwxgtk3.0-* 
git clone https://github.com/shumatech/BOSSA.git
cd BOSSA
make
sudo cp bin/bossac /usr/local/bin

Windows

You can download BOSSA from https://github.com/shumatech/BOSSA/releases/download/1.9.1/bossa-x64-1.9.1.msi

VERY IMPORTANT: During the installation, you much choose to install into c:\Program Files. The installer might have the wrong path, so edit it to match c:\Program Files.

After the installation, you must add BOSSA to your PATH:

set PATH=%PATH%;"c:\Program Files\BOSSA";

Test that you have installed “BOSSA” correctly by running this command:

bossac --help

Flashing

Once you have installed the needed BOSSA command line utility, as in the previous section, you are ready to build and flash code to your Arduino Zero board.

CLI Flashing

  • Plug your Arduino Zero board into your computer’s USB port.

  • Build and flash your TinyGo code using the tinygo flash command. This command flashes the Arduino Zero with the blinky1 example:

    tinygo flash -target=arduino-zero examples/blinky1
    
  • The Arduino Zero board should restart and then begin running your program.

Troubleshooting

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

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

  • Now try running the tinygo flash command as above:

    tinygo flash -target=arduino-zero [PATH TO YOUR PROGRAM]
    

Once you have updated your Arduino Zero 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 Arduino Zero as a serial port. UART0 refers to this connection.