Midi router questions @ IIC module / router

MIDIbox HUIs
1

Hello and thanks to those who helps, that make midi really friendly :thumbsup:

(Btw: I bought a PIC-programmer and felt in love with it :ahappy: )

After studying this MIDI, Midibox and DIY stuff, I came to the conclusion the best for me (organ console for Virtual Pipe organ, 3 manuals, 1 pedal, 1 scanner for stops, 1 AIN and a beginner for assembly the parts to a working all) would be a combination of 5 x Petkov-scanner (http://www.reocities.com/JDPetkov/Hardware/midikeyb/mkcs.gif ; I just feel stupid to use this marvellous PIC-core for only a so basical job like scanning), connected over 4 x IIC-modules to a PIC-Core , the 5th scanner connected directly to the PIC-core (and a commercial MIDI-USB)

And thats all my question: does a PIC-core used as router accept 4 x midi-IN + a 5th midi-IN directly in the IN of the core and a pot connected also to one analog ports of the 18f?

And last question: Is there reasons to not do so like I am planning?

Thanks in advance!

Francois

2

This solution is probably more expensive than really required.

How about MIDIO128 V3, which allows you to do this all from a single 32bit core: http://www.ucapps.de/midio128.html

It supports up to 16 matrices (what you call ā€œscannerā€).

It has USB MIDI integrated.

And it supports analog inputs. :slight_smile:

-> No additional MIDI router required and minimum latency (especially since USB MIDI is used as transport protocol :slight_smile:

Best Regards, Thorsten.

3

This solution is probably more expensive than really required.

Dear Thorsten,

Was fƃĀ¼r eine Ehre! Danke fƃĀ¼r die schnelle Antwort :wink:

The midibox 128 v 3 is very impressive. Wow, connecting two consoles to the same computer, or a 5-man. Theater-organ with Aftertouch on all keyboardsā€¦ all with maximal 7 little boards.

To be honnest, the smd cores make me problem. Speaking of the LPC, soldering myself -newbie- is excluded (no mention the boards printing) or let it sold from an experienced electronician is not easy.

Buy it is also quite impossible here in Colombia. We have unsure post-traffic, and I dont have a credit card, thats the must to pay embeddedartists (bank-transfer are here impossible, they pretext anti-narco laws, but in fact the banks here profit very well of isolation - think: Kreditzins: 33% per year).

So I came to this solution as a f-u-l-l - D-I-Y - solution with parts that are all existing here. A pre-assembled 128 v 3 would be nicer. (But well, I should have had let my Colombia-girlfriend come to Germany, I would still have my house organ etc. but I am happy here, so just making the best of it).

On the other side, we get parts quite cheap (16f84 for 1,40, Reichelt 2,50 for comparison, 18f452 for 5,- resistor 1/4W for < 0,01) and I can test all parts before buying, the electronic shops are all close to my job. And the design of the midi-box is really good for newbies.

So if you say, against this way (quite not so elegant) there is nothing, I would at least begin with it, till the intercontinental situation bettersā€¦

4

To be honnest, the smd cores make me problem. Speaking of the LPC, soldering myself -newbie- is excluded (no mention the boards printing) or let it sold from an experienced electronician is not easy.

All SMD parts are already pre-soldered on the LPCXPRESSO LPC1769 module which can be directly ordered in some national online shops (e.g. Mouser: Part #924-EA-XPR-003 for US $ 34)

So, itā€™s a very DIY friendly solution and thats the reason why I prefer to recommend it meanwhile :slight_smile:

Buy it is also quite impossible here in Colombia. We have unsure post-traffic, and I dont have a credit card, thats the must to pay embeddedartists (bank-transfer are here impossible, they pretext anti-narco laws, but in fact the banks here profit very well of isolation - think: Kreditzins: 33% per year).

ok, this affects the decision of course!

So if you say, against this way (quite not so elegant) there is nothing, I would at least begin with it, till the intercontinental situation bettersā€¦

yesā€¦

So, I think that the MIDI Router approach will work (although itā€™s a bit cumbersome)

And the AIN module can be serviced as well if you follow this tutorial: http://www.ucapps.de/mios_c_send_ain.html

With following modification in Init() (which has to be inserted into the Init() of the MIDI Router app):

MIOS_AIN_NumberSet(1);
MIOS_AIN_UnMuxed(); // no AINX4 module used
MIOS_AIN_DeadbandSet(7); // should be 7 when 7bit resolution is used
[/code]

















Best Regards, Thorsten.
5

Hmā€¦ in addition you have to re-configure the iic_midi.asm driver: http://svnmios.midibox.org/filedetails.php?repname=svn.mios&path=%2Ftrunk%2Fmodules%2Fiic_midi%2Fiic_midi.inc

because J5 inputs are normaly used for the RI_N pinsā€¦

The problem: configuring J5 for mixed purposes isnā€™t straightforward (has been improved a lot on the MIOS32 platform).

I canā€™t give you a valid configuration without testing this by myself, and I donā€™t know how many places in the code have to be changed to get it working properly.

If you search in this file for ā€œj5ā€ you will find the relevant configuration code (writing mux value into ADCON1) - compare it with the datasheet, it tells you valid analog/digital pin mappings

Best Regards, Thorsten.

6

Hmā€¦ in addition you have to re-configure the iic_midi.asm driver:

Best Thanks! With my little understanding of programing, this seems doable.

BTW: I was not really prepared for electronics in coming here to Colombia, since I had an organ next house to my flat and open-house for me all the time. But here I see the world diferently, and I think midibox is specially interesting for third world landsā€¦ So thanks again!