More than 4 DINs with new STM32 core?

Design Concepts
1

Given how much faster the new STM32 core should be, compared to the old PIC based cores, is it now potentially feasible to support more than 4 DIN modules using the same core?  If so, would any modifications to MIOS be required?  (Most likely I need 7 or 8 - this is for MIDIfication of a medium sized organ.)  Thanks!

2

The default is 16 shift registers (4 x DINX4’s) this is controlled by MIOS32_SRIO_NUM_SR and looking at the source to the rgb_led_controller example app, it will support 32 SR’s (8 x DINX4’s).

I don’t know how many tk has tried it with but it looks like 7 or 8 is fine and only requires a change to mios32_config.h

You will of course need to write your own app first :slight_smile:

Cheers

Phil

3

wow.

I guess one day, I’ll make an evolution of my protodeck controller and I’ll use a STM32!

indeed, today, I have 2 cores for 3 DINx4, 3 AINx4, 2 DOUTx4

with the STM32, I guess I’d have only one STM32 with all of that… and USB and and and  :stuck_out_tongue:

4

Thank you for your reply!  I hope to be able to use MIDIO128, perhaps with similar modifications so as to accommodate the 7-8 DIN modules.  I’m not quite ready to write my own app yet but I can probably figure out the necessary modifications to MIOS and MIDIO128 as long as there’s some reason to think that - with the STM32 based core - it is likely to work and not run into timing or other similar issues.

Thanks again!

The default is 16 shift registers (4 x DINX4’s) this is controlled by MIOS32_SRIO_NUM_SR and looking at the source to the rgb_led_controller example app, it will support 32 SR’s (8 x DINX4’s).

I don’t know how many tk has tried it with but it looks like 7 or 8 is fine and only requires a change to mios32_config.h

You will of course need to write your own app first :slight_smile:

Cheers

Phil

5

I’m not quite ready to write my own app yet but I can probably figure out the necessary modifications to MIOS and MIDIO128 as long as there’s some reason to think that - with the STM32 based core - it is likely to work and not run into timing or other similar issues.

No problem, Don’t forget though that none of the MIOS8 apps SID/IO/LC etc have been ported to MIOS32 yet! It is a pretty big undertaking and tk has been concentrating his efforts (quite rightly IMHO) on the Sequencer.

Having said that, there is a simple example called SRIO which does the following:

  • DIN pins will be forwarded to DOUT pins

  • DIN pins send a MIDI message (Note Events)

  • DOUT pins controllable via Note Events

  • Encoders at SR 13/14 will send CC events

This could be (fairly) easily adapted for simple MIDIfication and being C based any mods are much easier than the CORE8 ASM based code…

Thanks

Phil

EDIT: Having just done a SVN Update I see that yet again tk proves me wrong and releases a (draft) Core32 version of Midibox LC!!!

6

The default is 16 shift registers (4 x DINX4’s) this is controlled by MIOS32_SRIO_NUM_SR and looking at the source to the rgb_led_controller example app, it will support 32 SR’s (8 x DINX4’s).

I don’t know how many tk has tried it with but it looks like 7 or 8 is fine and only requires a change to mios32_config.h

You will of course need to write your own app first :slight_smile:

Cheers

Phil

Does this mean one can simply chain up to 8 DINX4 modules on to the end and MIOS takes care of it? (I’d of course have to write an app that uses these)

I assume the same applies for DOUTX4 too?

Thanks :slight_smile: