MB6582 and MIOS Problems

MIDIbox SID
,
1

I’m having a bit of an issue with my build I recently completed.  Please excuse the newbness…I’m a bit new to the digital realm of synths but plenty of years in analog circuitry.  I finally took the dive into this project to accompany my expanding modular synth and it looks like I hit my first wall.  Running MIOS on OS 10.8.4 with a MOTU Fastlane that doesn’t seem to appear on the blacklist. PIC was purchased from Smash w/V1.9G and devID 0. I have all the other PICs pulled so I can get this thing tested.  PSU is a linear Condor +5V/3A, 9V ~1.5A

 

MIOS on launch scans the MIDI interface

 

MIDI: Fastlane USB #3 Port B

 

Scanning for MIDI Inputs…

[1] Fastlane USB #3 Port A

[2] Fastlane USB #3 Port B*

MIDI Monitor Ready

 

…end nothing else after this

 

Output wind ow shows:

 

Scanning for MIDI Outputs…

[1] Fastlane USB #3 Port A

[2] Fastlane USB #3 Port B*

MIDI Monitor Ready

 

[16697.988] f0 00 00 7e 32 00 00 01 f7

[16697.988] f0 00 00 7e 40 00 0d 02 00 00 00 00 00 00 01  00 00 00 00 f7

[16698.199] f0 00 00 7e 40 00 02 f0 00 00 00 01 10 11 12 13 14 15 16 17 18 19 1a f7

[16698.412] f0 00 00 7e 40 00 02 f0 00 00 00 01 10 11 12 13 14 15 16 17 18 19 1a f7

[16698.512] f0 00 00 7e 40 00 02 f0 00 00 00 01 10 11 12 13 14 15 16 17 18 19 1a f7

COUNTING CONTINUES

…

 

When I send a query it seems to contact the PIC because the LCD window shows [Rebooting MIOS]

Then flashes the MIOS version and then shows [Ready]

 

So far I’ve started on the debug page and nothing is really working except for MIDI is showing the loopback on TEST PC1 

TEST MIDI1 Pass

TEST MIDI2 Fails

TEST OUT1-3 Fails

 

TEST IN1A&B Good

 

I need to continue with the other tests but I’m wondering if this maybe a problem with my MIDI interface before I continue.

 

Thanks so much for any help.

 

 

 

 

 

 

 

 

 

2

Hi,

 

since the PIC reboots, it’s very likely that it receives the SysEx commands which have been sent by MIOS Studio.

Only the PIC MIDI OUT -> Mac MIDI IN path seems to be problematic.

 

Since “TEST PC1” is working, an incompatibility issue with your MIDI interface is unlikely. I would continue with the core tests

 

Best Regards, Thorsten.

3

Thanks Thorsten,

 

I had a chance to throughly check things tonight and gone through all the CORE testing.  Everything seems to be in order with the exception of one test.  There’s 5.03V getting into the 5V supply line.  I’m seeing 4.32V at the M- pin of J12A (midi out).  I’m seeing this on the other side of the 220r resistor R8 and traced this back to J11 but I’m unsure why this is happening.  I’m a little confused here.  I can follow this voltage but I lose it after the bottom row of J11 and I don’t see where this trace leads…I’m using the MB-6582_Base_PCB_Color pdf that I have to follow traces.  I’m not sure exactly how to follow this voltage.  Any ideas?

 

Thanks!

 

ken

4

You will probably see this lower voltage when the MIDI OUT port is connected to the MIDI IN of your MIDI interface, is this the case?

If you disconnect the MIDI cable, you should measure 5V, right?

 

Concerning the failing “TEST MIDI2”: what happens, if you connect the RX Pin to J12:M- (this would bypass R7)

 

Best Regards, Thorsten.

5

Hi,
I dont know if I have understood well if you have no response from the core.
When I built my MB6582 I had no response because of J11.
I used a defective jumper ( it had no metal inside) so J11 was always open with no feedback from the core .
regards

Antonio

6

Got it working!!!  Turns out there was an intermittent connection at J11…I apparently missed soldering a row on the header so the midi out wasn’t making it back out.  

 

Thanks so much for helping Thorsten and Antonio!!!

 

I have one problem that I’m tracking down.  The LFO waveform switch doesn’t seem to be stepping through the waves.  Maybe I’m missing something here.  I need to read through the walk through a little more carefully.

 

Thanks again guys!