controller sending sysex message

MIDIbox HUIs
1

Hello every MB builder and user,

I was looking for a midi controller that could send SYSEX messages like this one:

F0 (sysex start)

01 (factory brand ID)

20 (synth type or ID)

01 (file version)

01 (program parameter)

xx (parameter number) varies fom 0 to 127 (in decimal) but is dedicated to one control ie one pot for instance

yy (parameter value = LSB nibble)

zz (parameter value = MSB nibble)

F7 (sysex end)

Is MB64 soft only handling CC events? or has someone developped a special soft or routine to help me?

By the way is someone knowing if it would be possible to handle checksum too in that kind of sysex message?

Thank you very much for your gentle help

2

Replace the mb64_meta.inc file by following code, and you will be able to send this type of SysEx message with meta events

;; --------------------------------------------------------------------------
;; This function is called by mb64_midi.inc when a meta event (Fx xx) has
;; been assigned to a pot or button
;; You can use this handler to enhance the firmware by your own MIDI events.
;; Here you are able to send more than one MIDI event (i.E. two Note On
;; Events to control Cakewalk via MIDI remote with one button), or a
;; SysEx/NRPN string to your synthesizer, or just to toggle PIC pins
;; in order to switch relays...
;; IN:
;; on pot events (entry point: MB64_META_Handler_Pot):
;; o Pot number in MB64_CURRENT_POT (BANKED access required!)
;; o first MIDI byte in MIDI_EVNT0 (no BANKED access required)
;; o second MIDI byte in MIDI_EVNT1 (no BANKED access required)
;; o pot value in MIDI_EVNT_VALUE (no BANKED access required)
;;
;; on button events (entry point: MB64_META_Handler_Button):
;; o Pot number in MB64_CURRENT_BUTTON (BANKED access required!)
;; o first MIDI byte in MIDI_EVNT0 (no BANKED access required)
;; o second MIDI byte in MIDI_EVNT1 (no BANKED access required)
;; o button value in MIDI_EVNT_VALUE (no BANKED access required)
;; --------------------------------------------------------------------------
MB64_META_Handler_Pot

;; THIS IS JUST AN EXAMPLE META EVENT HANDLER
;; ADAPT IT FOR YOUR NEEDS!

;; we are using the same handler for pots and buttons here
rgoto	MB64_META_Handler

MB64_META_Handler_Button

;; THIS IS JUST AN EXAMPLE META EVENT HANDLER
;; ADAPT IT FOR YOUR NEEDS!

;; we are using the same handler for pots and buttons here
rgoto	MB64_META_Handler


;; --------------------------------------------------------------------------
;; THIS IS JUST AN EXAMPLE META EVENT HANDLER
;; ADAPT IT FOR YOUR NEEDS!
;; HINT: if a large number of SysEx strings with the same structure (means:
;; for the same synth) should be sent, it would be more advantageous to
;; use a table which contains the parameter values and refers to the
;; sending routines
;; --------------------------------------------------------------------------
MB64_META_Handler

; F0 (sysex start)
; 01 (factory brand ID)
; 20 (synth type or ID)
; 01 (file version)
; 01 (program parameter)
; xx (parameter number) varies fom 0 to 127 (in decimal) but is dedicated to one control ie one pot for instance
; yy (parameter value = LSB nibble)
; zz (parameter value = MSB nibble)
; F7 (sysex end)

movlw	0xf0
call	MIOS_MIDI_TxBufferPut
movlw	0x01
call	MIOS_MIDI_TxBufferPut
movlw	0x20
call	MIOS_MIDI_TxBufferPut
movlw	0x01
call	MIOS_MIDI_TxBufferPut
movlw	0x01
call	MIOS_MIDI_TxBufferPut
movf	MIDI_EVNT1, W ; parameter number == number of meta event (e.g. Meta Event 0xf0 0x01 -> MIDI_EVNT1 == 0x01)
call	MIOS_MIDI_TxBufferPut
movf	MIDI_EVNT_VALUE, W	; extract lower nibble
andlw	0x0f
call	MIOS_MIDI_TxBufferPut
swapf	MIDI_EVNT_VALUE, W	; extract upper nibble
andlw	0x0f
call	MIOS_MIDI_TxBufferPut
andlw	0xf7
call	MIOS_MIDI_TxBufferPut

return

[/code]









Checksum: as you can see, this generic approach allows you to generate \*any\* kind of checksum ;)







In fact, you are able to send \*any\* kind of MIDI message this way, not only SysEx







Best Regards, Thorsten.