tinygo/targets/grandcentral-m4.json

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