Arduino MKR1000

The Arduino MKR1000 is a very small ARM development board based on the Microchip SAMD21 family of processors. It also has a NINA-W102 chip onboard which provides an wireless communication abilities based on the popular ESP32 family of wireless chips from Espressif.

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 PA22
D1 PA23
D2 PA10 I2S_SCK_PIN
D3 PA11
D4 PB10
D5 PB11
D6 PA20 LED
D7 PA21
D8 PA16 SPI0_SDO_PIN
D9 PA17 SPI0_SCK_PIN
D10 PA19 SPI0_SDI_PIN
D11 PA08 SDA_PIN
D12 PA09 SCL_PIN
D13 PB23 RX0, UART_RX_PIN
D14 PB22 TX1, UART_TX_PIN
A0 PA02
A1 PB02
A2 PB03
A3 PA04
A4 PA05
A5 PA06
A6 PA07 I2S_SD_PIN
USBCDC_DM_PIN PA24
USBCDC_DP_PIN PA25

Machine Package Docs

Documentation for the machine package for the Arduino MKR1000

Installing BOSSA

In order to flash your TinyGo programs onto the Arduino MKR1000 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-gtk3-dev
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 must 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 MKR1000 board.

CLI Flashing

  • Plug your Arduino MKR1000 board into your computer’s USB port.

  • Build and flash your TinyGo code using the tinygo flash command. This command flashes the Arduino MKR1000 with the blinky1 example:

    tinygo flash -target=arduino-mkr1000 examples/blinky1
    
  • The Arduino MKR1000 board should restart and then begin running your program.

Troubleshooting

If you have troubles getting your Arduino MKR1000 board to receive code, try this:

  • Press the “RESET” button on the board two times to get the Arduino MKR1000 board ready to receive code.

  • Now try running the tinygo flash command as above:

    tinygo flash -target=arduino-mkr1000 [PATH TO YOUR PROGRAM]
    

Once you have updated your Arduino MKR1000 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 MKR1000 as a serial port. UART0 refers to this connection.

For information on how to use the built-in NINA-W102 wireless chip with the default firmware, please see the “wifinina” driver in the TinyGo drivers repository located at https://github.com/tinygo-org/drivers/tree/release/wifinina.

You can also use the Espressif ESP-AT firmware, although you will need to flash it yourself. Please see the “espat” driver in the TinyGo drivers repository located at https://github.com/tinygo-org/drivers/tree/release/espat.