Skip to content
Branch: master
Find file History
Permalink
Type Name Latest commit message Commit time
..
Failed to load latest commit information.
include Update with USB bootloader! Oct 8, 2016
top Make bootloader smarter, able to handle control messages. Oct 8, 2016
Makefile
README.md Update readme Oct 8, 2016
addresses.ld Update with USB bootloader! Oct 8, 2016
image.elf-0x00000.bin
linkerscript.ld
main.c Update documentation in main Oct 8, 2016
romlib.c Update with USB bootloader! Oct 8, 2016
startup.s
usb_config.h Update with USB bootloader! Oct 8, 2016

README.md

espusb bootloader

THIS IS A WORK IN PROGRESS. It is NOT YET A BOOTLOADER, just a really small USB thinger.

But, it's totes a SDK-less implementation that works with USB!

Ok, it's a little bigger than I was initially hoping, at 2.5kB, but, it seems to work pretty solid. It's much better than when you have the wifis and everything else going.

Right now, it just accepts control messages of length of ~2090 bytes (2048 plus a little bit) back and forth. Check out the "main" function for more info about how it works. You also get to keep the bRequest, wIndex, and other details so you don't need to weigh down the code with a protocol ontop of the control requests. I've tried sending/receiving as quickly as I could and I seem to get around 30kB/sec down at the same time as 30kB/sec up, or 60kB/sec in one direction.

Detection that there is a computer seems to happen in .1 to .3 seconds, so that's good.

I am still trying to figure out a good way to merge the interfaces... Take a look at main and see if you want something a little different?

You can’t perform that action at this time.