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Flashing the Firmware with ST-Link (unable to communicate through USB)
To start out, I have a relatively new printer from somebody who sold it as new, but it wasn't. I got the refund, but it has errant printing behavior, a non-functioning SD Card slot, and communication issues in which I get some function from JGCreate over USB cable. Cura and pronterface just throw errors. There was a loose connector to a motor and one to a micro-switch, but nothing looks burned.
The board may be toast, but if I can successfully flash it COMPLETELY and it doesn't work, I'll pull it and replace it.
I found only the wiki instruction and various videos and
instructions for other devices, including repairing the bootloader first
with a hex file (wouldn't I need to reload the bootloader if I'm having
COM issues?) and then the firmware for the printer, and on other
printers, that may include yet another file for the screen or whatever.
Yet the popular video out there is somebody with an audio mixing board
who doesn't connect anything, and doesn't explain the firmware loader.
It didn't do it for me.
Where are the better instructions for printer boards???
and the process is so simple - What is it like 6 easy steps?! With some pics, it could be compressed to the size of this post.
The other thing about this is the 32bit JGAurora board firmware and the bootloader - are people flashing these things trying to fix issues, but not reloading the bootloader? oy vey, I'm kinda old, but if you are reloading the firmware for the printer because of an unknown issue - don't you also start fresh with the bootloader? Get me up to speed regarding the bootloader here please.
So about the wiki
I do not know how to hook up the data wires, as well as the operations in the software for ST-Link.
It
is not reasonable to just click on things, open things, etc., or even
worse try to figure out which are the "data connections" and guess.
Anyway, can we do some actual instructions that would forgo understanding the
technical construction of my mainboard for now? I just want to connect the
wiring properly and load the files correctly. I included the wiki
instruction below as a starting point, but it's nearly useless for me
because I have no knowledge of printer mainboard designs, and I can't find a good tutorial for ST-Link Utility.
I can even help add some screenshots or pics on the board in the process once I know what I'm doing.
FROM THE WIKI:
Connect this port up to an ST-Link
V2 using jumper wires / dupont cables, and you will be able to backup
and upgrade the firmware on the A5S & A1. I recommend NOT plugging
in the 3.3V line, but instead provide power to the board via USB cable,
and only use the data and GND lines on the ST-Link header connection. I recommend you use the STM32 ST-LINK Utility (STSW-LINK004). Please post on the jgaurora forum firmware discussion thread if you want any help with this!
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