ilmenator

Hey, sorry - no offence, I just saw it and thought it was funny!

Sounds interesting and absolutely makes sense. Would they also share the complete Ethernet protocol with you? However, this is a huge project, and way off the beaten path because of Ethernet. There is an ETH module that provides the hardware, and the new LPC17 core module will even have a connector on board. But that does not mean that you just plug in a cable and it works. You will most probably have to implement quite a lot of functionality (the protocol) yourself, this is definitely not a MIDIbox beginner's project.

Genau lesen - das hat niemand behauptet!

Totally possible, but what would you need that for? E.g. wanting "Ethernet connectivity" is a bit vague - what is it that is sitting on the other end of your Ethernet cable? Does it provide enough feedback, and do you know its protocols?

Wow, great! Btw, you are one month ahead of time (see the date stamp in your schematic :whistle: ).

Das ist keine empfohlene Loesung - diese Systeme kennt hier niemand, und entsprechend wirst du hier keinen Support finden, der dich bei Problemen weiterbringt. Falls du auf einem Windows-System zuhause bist, dann findest du relevante Information im Wiki hier. Saemtliche Dateien findest du im "Repository", Startpunkt zum Beispiel hier. Komfortabler geht das mit einem SVN-Client, zB Tortoise SVN. Mehr Infor dazu findet sich =tortoise]hier.

Schau dir deine Platine (und den Core32-Schaltplan) nochmal an, dann wirst du feststellen, dass SCLK fuer J15A und J15B von unterschiedlichen Core-Pins angesteuert wuerde. SCLK liegt da, wo "normale" Displays den "E"nable-Pin haben. Der muss fuer den Betrieb von "normalen" Displays natuerlich auch von verschiedenen Core-Pins aktiviert werden, wenn die Displays unterschiedliche Dinge anzeigen sollen. Fuer deine Loesung wuerde dann SCLK fuer jede 8er-Gruppe von einem unterschiedlichen Pin kommen. Das musst du softwareseitig beruecksichtigen.

Wenn du beruecksichtigst, dass SCLK dann von zwei unterschiedlichen Core-Pins aus getriggert wird, sollte das funktionieren. Wie aufwaendig das software-seitig wird?

On ucapps.de it says about the STM32-based core: "I2C peripheral has conceptional flaws which requires the usage of high priority interrupts to prevent corrupted transfers" - so that you should keep in mind. Looking at what is there, I would assume that you have to adapt the code from MIOS8 to MIOS32 in order to make it work. Whether this is an easy task or not will depend on your programming skills. In any case, it should be doable, I believe - but I did not look at the code and don't have a Speakjet chip to try :twitch: .

Your profile does not show where you are located - it would help to find people near you!

Such equipment would be really difficult to find today... Yamaha DMP7 anyone?

I use a Behringer DDX3216 with ADAT to go into my DSP Factory cards with ADAT interface. The Behringer I got from e*** for cheap, and I replaced the NJM 4580L Opamps with NE5532 types - it is really silent now. Plus a set of analog patch bays on the Behringer's inputs. Unfortunately, all that is packed away at the moment... sigh.

Yes, though I'm a bit afraid of going that road... never done that before. But then, it sounds like a good reason to start with FPGAs!

Thanks, that's what I needed to know - too bad. The Waldorf MIDIbay is a 15x16 Matrix, which means that I am looking at a 32x32 design. Using discrete multiplexers will make this thing rather costly, as component count will increase exponentially. Any other ideas anyone?

It depends on your software, i.e. on "Audiorealism Bassline 2" - if it sends out its (button, LED) state via MIDI messages, then what you want is possible. But, I would suspect that it is input only, and won't send MIDI messages, so the answer is most probably a no. Check the manual and check the MIDI out of the plugin to see what happens if you change button / LED state with the mouse.

Hi, my MIDI setup is really too large, which means that my Waldorf MIDIbay is getting too small... Thinking of alternatives, I was wondering if it was possible to hack a Core8 or Core32 with attached DIN and DOUT modules into a MIDI router? No processing of MIDI data is required, the task would be to just pass on any HI or LOW signal at a given DIN input to any (selectable, multiple) DOUT output. As this would have to be done faster than MIDI data rate, what is the DIN minimum scan time, and would this be feasible at all? I don't have a scope, but maybe someone (TK?) could look into this? Best, ilmenator

I find this interesting from a usability point of view, not just in the MIDIbox context. Until now you are the only person I know that is complaining about such effects - is your particular display that bad, or are you extremely sensitive? Apart from the annoyance factor, what is the benefit of a "faster" display? Would you be able to handle the unit in a faster way? I doubt that...

I think you don't have to ruin your PCB, it probably looks something like the attached schematic? At least this is valid for my B-75. I have not tried yet, but it looks like you could just hook up to the connectors on the PCBs and into the DIN modules. Best, ilmenator Edit: Well, if the Scan Matrix was 4x12, and not 8x8... shame! Yamaha Electone C-55n Keyboard Matrix.pdf

Photos first! :whistle:

The link works only for members with 'Programmer' status.

Yes, just zip the file(s).

1N4148

Put some solder on the tip of your iron, take some pliers and grab the component on one end and place the other end on top of one of the pads. Solder the one end with the solder that is still attached to your iron's tip. Then do the same with the other end of the component. Use solder flux for best results. It's really as simple as that. The glass body of the diode is actually really handy as it does not stick to the pliers. If you let the one end of the diode cool down before you solder the other, then the component should not move away from its place - again, flux helps.

I was more referring to something like this. But any package/case you can get across should be fine as long as you feel comfortable with its size. MiniMelf is quite standard, i.e. available all over the world (my part of the world? :rolleyes: ).

If it was my board, I would go smd for the diodes. That way, soldering the diodes on the "back" side would be natural, and the whole thing would still look nice and tidy. 4148s can be had in MiniMelf (MMA) 0204 L=3,6mm, Ø=1,4mm, which is not too bad to solder even for beginners.