# Firmware Build Files

- [CM4](/wiki/products-eol/cbu-cm405-fc-eol/firmware-build-files/cm4.md)
- [ArduPilot](/wiki/products-eol/cbu-cm405-fc-eol/firmware-build-files/ardupilot.md)
- [hwdef.dat](/wiki/products-eol/cbu-cm405-fc-eol/firmware-build-files/ardupilot/hwdef.dat.md)
- [hwdef-bl.dat](/wiki/products-eol/cbu-cm405-fc-eol/firmware-build-files/ardupilot/hwdef-bl.dat.md)