LPC17 SEQ and BLM Interconnections

MIDIbox SEQ
1

Hello,

 

I am confused by the connection for BLM on Smash’s 4xIIC midi module. Since STM32 does not have midi I/O 4, it can only be connected to Midi I/O 3, - this is clear from the interconnect diagrams, however, I am using LPC17, so should I connect to Midi I/O 3 (J5b) or Midi I/O 4 (J4b) … also, on the IICx4 board, I see Mi1/Mo1 and Mi2/Mo2, which side should I connect here?

 

Thanks!

2

Hi,
 
 
 

however, I am using LPC17, so should I connect to Midi I/O 3 (J5b) or Midi I/O 4 (J4b) …

 
it doesn’t matter, because the BLM port can be selected in the MIDI configuration menu.

See also http://www.ucapps.de/midibox_seq/cs4/midi4.gif
 
Note that on the MBHP_CORE_LPC17, J5B.A7 is MO3, and J5V.A6 is MI3 (swapped compared to MBHP_CORE_STM32)
 
 

also, on the IICx4 board, I see Mi1/Mo1 and Mi2/Mo2, which side should I connect here?

 
MI1/MO1 is the preferred choice, because the MIDI IN connection will go through the optocoupler.
MI2/MO2 could be used for a TTL level connection (without optocoupler)
 
Best Regards, Thorsten.