powerpants
Member
Hi,
I have been using my Maple as a general stm32 dev board, but I want to reset it back to the "factory default." I have my FTDI cable all hooked up to the serial port, but when I go to the "burn bootloader" drop down menu, no options come out.
What is the recommended for re-flashing the bootloader through the serial port?
Thanks!
PS - I'm on OSX, if that matters.
gbulmer
Moderator
Are you connected to the correct USART port?
The manufactured-in ST Micro bootloader uses USART1, which are pins 7 & 8 on the digital headers.
There is an application note called AN2606 at ST Micro's web site, st.com, on the 'official' approach.
There is also a thread here on the approach used by the LeafLabs folks (I'll have a quick search, but you can probably find it as easily as me).
powerpants
Member
Yeah, I'm connected to the right port - the issue is that I can't get the IDE to give me something to click on to initiate the process.
I remember that thread too - I tried searching for it for 10 min or so, but didn't find it, grr. I looked at the makefile in the bootloader directory, but figured i'd just post to see if there was a quick answer before hacking on that.
gbulmer
Moderator
This might be a useful place to look:
http://leaflabs.com/docs/libmaple/unix-toolchain/
It describes the tool chain used by LeafLabs to burn programs from the command line. AFAIK, the IDE has no support for burning bootloaders.
Then this briefly describes using the serial bootloader:
http://forums.leaflabs.com/topic.php?id=118#post-730
There is more detail here:
http://micromouseonline.com/blog/2009/05/07/stm32-arm-cortex-bootloader
If you have an FTDI cable plugged in to the correct pins this should work.
powerpants
Member
Aha! I found it and it worked!
Here's the thread:
http://forums.leaflabs.com/topic.php?id=32
I had to use the google search to find it since it is an old thread and the built in search engine only returns the top 5 results. Maybe I just don't know how to work it right.
If there is no support for burning bootloaders, what is the "burn bootloader" menu option under the "Tools" dropdown for? Is it just not implemented yet or something?
Thanks for the replies!
gbulmer
Moderator
powerpants -
If there is no support for burning bootloaders, what is the "burn bootloader" menu option under the "Tools" dropdown for? Is it just not implemented yet or something?
I am just a humble user.
AFAIK, it isn't implemented yet. (probably part of the reason for the instructions in the thread :-)
There is still at least one revision of the IDE before it gets to "1.0"
mbolivar
LeafLabs
gbulmer -
You are correct; burning the bootloader is an unimplemented IDE feature. Although what with it requiring extra hardware and being a potential source of mischief for an inexperienced user, I guess it's a little questionable whether it belongs in the IDE at all.
FWIW, bnewbold's post referenced by powerpants is still how we flash the bootloader onto new Maples.
gbulmer
Moderator
Although what with it requiring extra hardware and being a potential source of mischief for an inexperienced user, I guess it's a little questionable whether it belongs in the IDE at all.
I mostly agree with you, but the Arduino also needs special hardware, so someone thought it worth while :-)
A Maple isn't too bad, it needs a USB to serial cable/adapter/...
After 1.0 is out, it might be worth writing the sketch to use one Maple to flash another (just using a Maple as the USB to serial converter). Then it is easy to see that it is worth buying two Maples :-)
perry
Administrator
gbulmer,
[perry's comment partially redacted ;) Heres a sanitized version
-poslathian ]
SerialUSB voodoo:
Ugh, such voodoo. I dont want to get anyones hopes of of full fixes in 0.0.7, its a very hard problem (but have cleaned up a lot of related bugs in 0.0.7). However, we had the pleasure of talking it over a lot recently - and with a lot of users and developers of other products at maker faire - and have finally settled on a long term fix. Its a hardware fix, and a feature add, and were psyched. In the meantime if SerialUSB is really killing you, (and I hate to do this) please use the UART's with an FTDI for now - but with confidence that this problem will not plague this platform forever ;)
from original comment:
This would also allow us to add some JTAG based debugging features to Maple. It's a fairly large change and will add some cost to the board (~3.00??), but I think would be worth it just for my sanity, and also to apparent reliability to users.
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