Adds a uf2 header Microsofts HID Flashing Format (UF2) for copying over to UF2 bootloader mass storage devices

Related tags

Operating systems rust embedded bootloader uf2
Overview

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
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Comments
  • help understanding relationship between memory.x and base offset

    help understanding relationship between memory.x and base offset

    Hi, I was told that for my particular bootloader, I should set -b to 0x26000, which accounts for the adafruit bootloader + the proprietary Bluetooth stack that the nrf52840 uses.

    Should I set memory.x to 0x26000? What exactly is the relationship between memory.x and the base offset?

    opened by TheButlah 2
  • uf2 crate name

    uf2 crate name

    Damn, you got the uf2 crate name on me.

    so my uf2 has a binary and a library. https://github.com/jacobrosenthal/uf2-rs

    My binary does flashing, verify, etc. I think convert would work well as a subcommand there as well so Im hoping to bring your lib in there. But I also think I think theres a good reason to have your converter not depend on my usb dependencies so I think it should be available separate as it is now.

    it would be good to actually make a cargo-conv type crate that can do uf2 and dfu conversions, like cargo conv --examples ferris_img --release -o ./Volumes/Pygamer/ferris_img.uf2 or something

    Can you think of a name I should use, or would you be willing to give up uf2? and take like uf2-conv?

    opened by jacobrosenthal 2
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Paul Sajna
I program my home computer / Beam myself into the future
Paul Sajna
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