README.md
Saturn-V Bootloader

A DAFU-Variant DFU Bootloader

_ for LUNA, and equivalent boards_

Based on ]]>opendime/DAFU/]]>
Based on ]]>t2-firmware/boot/]]>

Compatible with ]]>DFU Utils]]> and ]]>pyfwup]]>.

Code Origins

This code is a modified variant of the DAFU bootloader; a DFU bootloader for SAMD21-family microcontrollers.

Background

Saturn-V is the "recovery mode" (RCM) bootloader for LUNA. It's used to bootstrap an entire LUNA board;
and can help to recover the Debug Controller (DC) if the rest of the firmware is lost (or being developed!).

Typically, the Saturn-V bootloader will be used to flash the Apollo firmware onto the Debug Controller; which
can then be usd to bring up the main FPGA gateware.

Use

Compilation should be as easy as running the single Makefile. If you're not using the arm-none-eabi- toolchain,
you'll need to specify your compiler prefix using the CROSS variable.

Once the bootloader has been built, use an SWD programmer to load the .elf file; or program the relevant .bin
to the start of ROM (0x00000000).