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.
Like any other meson project.
<check out the code>
meson setup builddir
meson compile -C builddir
p3udl binary will be at builddir/src/p3udl
- Reset the board with the USB boot strap.
- Remove the strap (otherwise your SPI flash will be inaccessible...)
- Run
p3udllike 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.