{ "inherits": ["atsamd51j19a"], "build-tags": ["matrixportal_m4"], "serial": "usb", "serial-port": ["239a:80c9", "239a:80ca"], "flash-1200-bps-reset": "true", "flash-method": "msd", "msd-volume-name": ["MATRIXBOOT"], "msd-firmware-name": "firmware.uf2", "openocd-transport": "swd", "openocd-interface": "jlink", "openocd-target": "atsame5x" }