wackazong

Hi! I am trying to design an SMD layout for the core board. Would this quartz be alright? https://www.distrelec.com/distrelec/datasheets.nsf/WebAttachments/09E7D7F481414266C125714800461C15/$File/JXS75.pdf Thanks! ALEXander.

Hi! Maybe its a stupid question, but I did not find the answer here: Why does MIOS not use the built-in I2C support of the PIC 18F4685? Pins RC3 and RC4 are used for that, but at the moment they are used for J6 and J10. If I build a MidiBox 128, then theoretically I could use these pins for a full I2C implementation, with multiple master support, couldn't I? But that, of course, means extending MIOS, and I am not sure whether I will be able to do that... Best, ALEXander.

Perfect, thanks! I will keep you posted about progress, but at the moment there is not much to show. Best, ALEXander.

Hi! I was just wondering when I got up today: Isn't there a shift register like the 74HC165 available that has internal pull-up registers? Would make my life much easier right now. ALEXander.

Well, I was slightly amused ;) But thanks, I am now really at the point of making the PCB with everything on it. Has anybody ever made an SMD PCB for the core module? Cheers, ALEXander.

Well, ok, there you have it. I think I will manage, I just hope the I2C Bus really supports that many devices, and that it is not too sensitive to the pwm going on all around it.

Well, I did look for the datasheets for the PICs and the PCA6935. I know that this is possible, but I wanted to know how easy it would be to adapt MIOS to do that. Sorry if I did not formulate my question very clearly... Best, ALEXander.

Hello, I would like to control something like 40 PCA9635 (16 Channel LED PWM drivers with I2C interface) from MBHP. I know there is the IIC module, but that one allows only four slaves. My data rate on the I2C bus would be rather low, only a couple of LEDs to change from time to time, so overload should be no issue, I think. Still, I do not know how to connect the I2C bus to a MBHP core, who will act as the I2C master. I could either use a MBHP core that is already being used for a MIDIBox128, or use a dedicated MBHP core. The adressing needs seven bits, and I do not know how to handle that from MBHP. What do you think?

Of course, I realized that. Thats why i want 1x16 displays, or even 1x8. But I am still in the brainstorming stage :). But it would be nice to see directly at the encoder what it is assigned to, wouldn't it? 32 encoders is not that unusual, look at the bcr from behringer for example. How do you remember which encoder has which function on you controller, especially if you have like 5 different presets for it? I thought the best would be to label them directly, using the displays. Sort of like the new Novation SL controllers, but better.

Another question: The Nokia display is pretty big, I would just need one character line, maximum two, with maybe 20 characters. Is there a display that is compatible to the nokia and could do that? And: I do have different banks for the encoders, and when I switch banks I want to change the 32 lcd displays all at one. Is that possible in a recent amount of time (<0.5 sec)? Thanks very much!

Thanks! MIDIBOX never sleeps :) I will have a look at the DIN and DOUT, and at what happens when you use 4 cores together. I know about banks and so on, but I really want that many buttons, it will be an interface for improvisation, and life's too short to switch banks :) But thanks a lot, it seems generally possible, now I will go into studying the details. Best, ALEXander.

Hi! I am completely new to the MIDIBOX, but I would like to build my own MIDI controller, and it looks as if MIDIBOX could do the job. What I require ist: - about 100 buttons, each with an LED to show whether its on/off. Pressing the button sends a CC Message on a predefined channel, on receiving a cc value, the LED should light (with value 127) or go off (with value 0). Pretty easy so far, I suppose. - about 32 endless rotary encoders, each with an LED ring that shows the current fader position and can also be set via a MIDI CC message (the same CC the encoders sends when turned) - an LCD display for each encoder, which can receive MIDI Messages (SysEx, I suppose) and display arbitary text sent by the SysEx Message. Would that be possible? Any comments would be very much appreciated, as I am completely new to MIDIBOX and MIOS, but very willing to learn :) Thanks, ALEXander.