With which framework is the board support to be used? By default, platform-atmelsam has the general builder scripts for Arduino, Simba, Zephyr and mbed-os. And I don’t see any of these frameworks supporting a ATSAM4S4B if I search in their repos.
The page PanelDue - Not Maintained as the only developer resource links to a 3D printer sofotware GitHub - Duet3D/PanelDueFirmware: Firmware for the PanelDue touch screen for 3D printers.
The only thing that will surely work is setting up a Atmel-CMSIS environment like done in GitHub - maxgerhardt/pio-baremetal-atmel-cmsis and discussed in Bare metal on arduino due / atmelsam.