How did Wilba do it? SEQ V4 CS with only 6x74HC165 & 2x74HC595

MIDIbox SEQ
1

… considering a standard DIN module uses 4x74HC165 and provides “only” 32 ins (but ~90 are required)

… and a standard DOUT module uses 4x74HC595 and provides “only” 32 outs (but ~60 are required)

The pdfs on ucapps.de gave me no clues, as “only” the standard pinning is mentioned, which is fine, but how would i realize dual color step leds for example?

I guess the keywords are “button matrix” and “led matrix”, pointers are very welcome…

I found the respective matrix configurations in the wilba/mbseq_hw.v4 file, but don´t understand the associated necessary wiring yet…

thank you very, very much!

Peter

2

Compare http://svnmios.midibox.org/listing.php?repname=svn.mios32&path=%2Ftrunk%2Fapps%2Fsequencers%2Fmidibox_seq_v4%2Fhwcfg%2Fstandard_v4%2F

with http://svnmios.midibox.org/listing.php?repname=svn.mios32&path=%2Ftrunk%2Fapps%2Fsequencers%2Fmidibox_seq_v4%2Fhwcfg%2Fwilba%2F

Maybe Wilba can give you a schematic for the matrix wiring, I only did the programming :wink:

Best Regards, Thorsten.

3

kthxbai :slight_smile:

edit: within an hour Wilba sent me the scheme… better than sliced bread :), thx!

4

kthxbai :slight_smile:

edit: within an hour Wilba sent me the scheme… better than sliced bread :), thx!

Yup, I got mine too! thanks v.much Wilba!

5

Wilba, could i have a schematic for the matrix wiring too? Thanks.

6

[MB-SEQ-CS_combined.zip](< base_url >/applications/core/interface/file/attachment.php?id=8731)

1 Like
7

Thanks! Finally figured it out, Dos Equis time!

8

Hi MByers

i’ve got all the parts for finish a MBseq :frantics:

i was thinking building the WILBA’s control surface in DIY mode (veroboard) :whistle:

but i realise the WILBA CS is matrix wiring.

can i build it with standard DOUT and DIN for all switchs and duo leds?

or i need to do the matrix switching?

thanks

9

Have a read here: http://ucapps.de/mid…_manual_hw.html

And in the hwcfg folder of the Seq application download.

The matrix isn’t needed for a control surface for the sequencer, it just makes it more compact / use less shift registers. The matrix should be achieveable with regular DIN/DOUT modules.

10

yes, it works, you can also have a look at this thread, beginning here:

http://discourse.midibox.org/t/topic/14679

where a custom interface is built on veroboard without a matrix.

Greets,

Peter

11

yeah!!! thanks Peter !!!:smiley:

12

Ciao all,

since this is my very first post here in the forum, I want to say a big T H A N K Y O U guys for this awesome stuff. Almost everything is well documented and it makes fun to fiddle with these DIY projects.

I am currently building my own SEQ V4. The STM core is running well, together with SD card and displays. Everything worked straight on. No need to post questions up to now …

Now I am thinking about the user interface. I want to have reduced cable spaghetti, so I am interested in the matrix stuff. I want to describe here how I think it is working. Please any enlightened people correct me, if I have misunderstood something:

Talking about hwcfg/wilba vs. his schematic (Esp. thank you for that, Wilba :wink: !):

BLM8X8_DOUT_GP_MAPPING 1

This “1” points to U7 - 1st output SR where OUT0-OUT7 is connected? I can specify with the number in “SR” for each button, which of outputs OUT0-OUT7 is connected? like:

BUTTON_PLAY 18 5

18 => pin6 - DOUT6 ?

BLM8X8_DIN_SR 2

The “2” points to U2 - 2nd input SR where IN8-IN15 is connected? I can then specify with “Pin” which of IN8-IN15 is used for specific button? like:

BUTTON_PLAY 18 5

5 => IN13 ? Similar for the LEDs:

BLM8X8_DOUT_CATHODES_SR 1

The “1” also points to U7 - same SR like GP_MAPPING is used for LED matrix? Could be a different one?

BLM8X8_DOUT_LED_SR 2

This “2” points to U8 - 2nd output SR where DOUT8-DOUT15 is connected?

Some additional questions:

  1. Header 3 for Beat LED, usage of OUT15A is specified anywhere? Or just OUT14A+1? Or dualLED not used / implemented / “fake” ?

  2. Encoder always use 2 successive inputs (like IN6/IN7), whereas only IN6 is specified in hwcfg file?

  3. What about IN40 for knobs / IN41 for datawheel? Is this specified in hwcfg file? Sorry, I did not get the magic behind this. :logik:

Thanks for any comments, suggestions, answers.

Cheers,

ArnoNym