{ "inherits": ["atsamd51p20a"], "build-tags": ["grandcentral_m4"], "serial": "usb", "serial-port": ["239a:8031"], "flash-1200-bps-reset": "true", "flash-method": "msd", "msd-volume-name": ["GCM4BOOT"], "msd-firmware-name": "firmware.uf2", "openocd-interface": "jlink" }