Samd21 based boards using the Arduino bootloader and stdio over usb by default doesn't have enough RAM to run the test in its default configuration (1000 timers)
This is mostly based on the cc1352-launchpad boards, is essentially the same
buttons and leds pins, what changes is the CCXML files used to flash with
`make flash` and the UART pins.
Signed-off-by: Jean Pierre Dudey <jeandudey@hotmail.com>
