{ "inherits": ["atsamd51p20a"], "build-tags": ["grandcentral_m4"], "serial": "usb", "serial-port": ["acm:239a:8031", "acm:239a:0031", "acm:239a:0032"], "flash-1200-bps-reset": "true", "flash-method": "msd", "msd-volume-name": "GCM4BOOT", "msd-firmware-name": "firmware.uf2", "openocd-interface": "jlink" }