http://forums.leaflabs.com/topic.php?id=10461 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:08:24 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=10461&page=3#post-28639 Fri, 30 Aug 2013 22:50:31 +0000 feurig 28639@http://forums.leaflabs.com/ <p>gbulmer, the best docs is the usb doc.</p> <p><a href="http://www.usb.org/developers/devclass_docs/midi10.pdf" rel="nofollow">http://www.usb.org/developers/devclass_docs/midi10.pdf</a></p> <p>2 and three are well covered above. </p> http://forums.leaflabs.com/topic.php?id=10461&page=3#post-28638 Fri, 30 Aug 2013 19:12:09 +0000 feurig 28638@http://forums.leaflabs.com/ <p>mlundinse:<br /> Awesome! Thanks! </p> http://forums.leaflabs.com/topic.php?id=10461&page=3#post-28605 Thu, 29 Aug 2013 08:21:32 +0000 mlundinse 28605@http://forums.leaflabs.com/ <p>USB midi transports the same MIDI data and commands as old-serial-midi, so from an application point on the PC side there is almost no difference, its simply MIDI data.<br /> The USB-midi descriptor tells the host operation system to treat the device as a midiport and makes it available for MIDI music apps automagically, this works like a charm for me on my Mac. The higher USB bandwith makes it possible to have several virtual midi cables routed through a single USB midi endpoint.</p> <p>On the low level, microprocessor side, its a serial connection sending 4 byte packages consisting of a USB midi header byte and three bytes of midi data.</p> <p>As a USB device its very similar to a virtual serial port, the most difference is in the device descriptor that tell the host how the device serial data is interpreted as a connected MIDI device. On the Maple low level side I get 4 byte packets of data, then its up to my code, or the MIDI handling object, to interpret them as MIDI data. I use Google and the USB-MIDI specification.</p> <p>2) Its a serial data stream, the Sysex message type can be used to send 'any' device specific information. This can include binary data to a bootloader or a command to jump into bootleader mode. </p> <p>3) As far as I can see a USB - midi bootloader should be about the same size as a dfu bootloader. But then you would need a special host midi application to program the chip. So I think the best is to use Sysex to send the chip to bootloader mode and then use the standard dfu firmware loaders. </p> http://forums.leaflabs.com/topic.php?id=10461&page=2#post-28604 Thu, 29 Aug 2013 07:43:32 +0000 gbulmer 28604@http://forums.leaflabs.com/ <p>feurig/mlundinse - I don't understand USB-midi, so would you please answer a few questions?</p> <p>1. What is a good source for information on how USB-midi differs from old-serial-midi, so that I could "get up to speed"?</p> <p>2. Is there enough flexibility in the USB-midi protocol that it would be practical to bootload an underlying STM32F over USB-midi?</p> <p>3. If the answer to 3 is "YES", roughly how big might a USB-midi-capable-bootloader be, i.e. would it likely be comparable in size to e.g. LeafLabs Maple bootloader? </p> http://forums.leaflabs.com/topic.php?id=10461&page=2#post-28597 Thu, 29 Aug 2013 02:45:43 +0000 mlundinse 28597@http://forums.leaflabs.com/ <p>Ok</p> <p>I merged the latest commits from leaflabs/master into my repo and then<br /> pushed the result to github.</p> <p>/Magnus </p> http://forums.leaflabs.com/topic.php?id=10461&page=2#post-28594 Wed, 28 Aug 2013 19:48:15 +0000 feurig 28594@http://forums.leaflabs.com/ <p>Any chance of getting the updated usb_midi_device.c so we are working off of the same page. </p> http://forums.leaflabs.com/topic.php?id=10461&page=2#post-28591 Wed, 28 Aug 2013 16:25:22 +0000 mlundinse 28591@http://forums.leaflabs.com/ <p>not yet, its all a bit of a mess with different branches for different experiments, the midistuff one of them. </p> http://forums.leaflabs.com/topic.php?id=10461&page=2#post-28590 Wed, 28 Aug 2013 14:44:18 +0000 feurig 28590@http://forums.leaflabs.com/ <p>mlundinse: I am not seeing the new code did you push it?</p> <p>"I did implement your midipacket (32bit) changes in my code" </p> http://forums.leaflabs.com/topic.php?id=10461&page=2#post-28561 Mon, 26 Aug 2013 16:53:34 +0000 feurig 28561@http://forums.leaflabs.com/ <p>I am going to refork ventosus's f303 based work and remerge and flesh it out a little further. I will repost when it is working. </p> <p>By winter I think we should be able to have something workable with both the library and the ide. </p> <p>Cheers. </p> http://forums.leaflabs.com/topic.php?id=10461&page=2#post-28500 Sat, 17 Aug 2013 03:51:06 +0000 mlundinse 28500@http://forums.leaflabs.com/ <p>I havnt touched this code in a couple of months, I did implement your midipacket (32bit) changes in my code, removing all the serial char stuff, but not the SysEx stuff yet.</p> <p>This code works well for my needs, sending MIDI packages from my OpenPipe to my PC synth.</p> <p>The build setup is still using a mess of local hacks to the IDE together with some libmaple mods, cleaning this up for public use is low on my priorities list. If the winter evenings becomes long, cold and boring I might have a go at it. </p> http://forums.leaflabs.com/topic.php?id=10461&page=2#post-28428 Wed, 14 Aug 2013 21:52:15 +0000 feurig 28428@http://forums.leaflabs.com/ <p>So I tried to merge our git code together after taking your code and making it 32 bit but the resulting cluster f**k is a pretty good example of why what is good for kernel developers is really f**king the general community. Basically it took a working code base and trashed it. </p> <p>Are you working any more with this or should I build on what I had before trying my lame git foo? </p> http://forums.leaflabs.com/topic.php?id=10461&page=2#post-25254 Thu, 25 Apr 2013 00:18:56 +0000 feurig 25254@http://forums.leaflabs.com/ <p>I have a rough in for maplemidi. I will test it tomorrow and see where you are at with the libmaple stuff. </p> http://forums.leaflabs.com/topic.php?id=10461&page=2#post-25104 Mon, 22 Apr 2013 20:23:01 +0000 feurig 25104@http://forums.leaflabs.com/ <p>I agree about the pick your what you want to put on top of the transport. As far as the Arduino Midi stuff; I am starting with the pteichman port which is based on the lgpl code. The current midi library is gpl3. Gpl3 is not only offensive to me personally (and thanks to the earlier licensing, I don't have to like it or use it) It is also incompatible with libmaple's licensing in general. </p> http://forums.leaflabs.com/topic.php?id=10461&page=2#post-25103 Mon, 22 Apr 2013 19:56:45 +0000 feurig 25103@http://forums.leaflabs.com/ <p>Also have you made any changes to the transport? I just moved to a uint32 based implementation. </p> http://forums.leaflabs.com/topic.php?id=10461&page=2#post-25102 Mon, 22 Apr 2013 19:52:10 +0000 feurig 25102@http://forums.leaflabs.com/ <p>"Getting it into the IDE is a whole different problem and depends on any plans from leaflabs to overhaul the IDE."</p> <p>Yeah as has been the usual for the last 6 months which finally they have admitted is not on their table while they try to pay the bills.</p> <p>I suspect we will have to move that forward ourselves as well. </p> <p>Which is why I was kind of bummed when I couldn't get your fork to build on osx.</p> <p>I could not get the usb to work without disabling the usbserial in the startup code. </p>