p3udl

USB downloader for pioneer3 and maybe others.

You will need the following:

• The usb updater binary IPL: https://github.com/DongshanPI/SigmaStar-USBDownloadTool/blob/master/ReleaseSampleTool/usb_updater.bin
• A u-boot.img file that is designed to be loaded via usb_updater.bin. Github actions should be generating such binaries here.

Building

Like any other meson project.

<check out the code>
meson setup builddir
meson compile -C builddir

p3udl binary will be at builddir/src/p3udl

Usage

• Reset the board with the USB boot strap.
• Remove the strap (otherwise your SPI flash will be inaccessible...)
• Run p3udl like this:

p3udl --ipl=<path to usb_updater.bin> --uboot=<path to the u-boot.img>

• Once u-boot is running you can use u-boot as if booted from local storage
• You probably want to use the 'dfu' support in u-boot along with 'dfu-util' to upload images but ymodem etc works too.