uf2conv
Adds a uf2 header Microsofts HID Flashing Format (UF2) for copying over to UF2 bootloader mass storage devices. UF2 is factory programmed extensively by Microsoft MakeCode and Adafruit hardware.
Install
cargo install uf2conv
Usage
$ uf2conv
error: The following required arguments were not provided:
<INPUT>
USAGE:
uf2conv <INPUT> --base <base> --family <family> --output <output>
For more information try --help
Base usage you'll want to give the --base memory address for your chip. This is where the code starts after the bootloader. In the case of embedded rust, thats found in your memory.x where you'll find FLASH (rx) : ORIGIN = 0x00000000+0x4000
or FLASH (rx) : ORIGIN = 0x00000000 + 16K
Where 16K in bytes is 16384 decimal or 0x4000 hex base.
$ uf2conv pygamer_blinky_basic.bin --base 0x4000 --output pygamer_blinky_basic.uf2
And you can copy that uf2 file to your embedded device's drive that appears when you enter bootloader mode.
Rust: How to get a bin file
Use cargo-binutils which replaces the cargo build
command to find and convert elf files into binary.
Install the dependencies
$ rustup component add llvm-tools-preview
$ cargo install uf2conv cargo-binutils
Then in your embedded project, say PyGamer
$ cargo objcopy --example blinky_basic --features unproven --release -- -O binary pygamer_blinky_basic.bin
$ uf2conv pygamer_blinky_basic.bin --base 0x4000 --output pygamer_blinky_basic.uf2