I have four joystick pots lying around since I tried to mod my UC-33e. I have a BCR2000 so I don’t really feel the need to build a controller MidiBox. But none the less, I’d like to use those pots. Here’s my idea…
I’m building a MidiBox SEQ2, and I was thinking maybe I could incorporate the pots in that project. Not to deal with the actual sequencer, but rather as a means to send CCs on a given midi channel, for example. I guess I’ll have to get an AIN board, but is there an easy way of adding the extra code to the PIC, making the function available in parallell to the sequencer?
no problem, just write following code to the USER_AIN_NotifyChange hook in main.asm
;; --------------------------------------------------------------------------
;; This function is called by MIOS when a Pot has been moved
;; Input:
;; o Pot number in WREG and MIOS_PARAMETER1
;; o LSB value in MIOS_PARAMETER2
;; o MSB value in MIOS_PARAMETER3
;; --------------------------------------------------------------------------
USER_AIN_NotifyChange
;; convert 10-bit value to 7-bit value
rrf MIOS_PARAMETER3, F ; value / 2
rrf MIOS_PARAMETER2, F
rrf MIOS_PARAMETER3, F ; value / 2
rrf MIOS_PARAMETER2, F
rrf MIOS_PARAMETER3, F ; value / 2
rrf MIOS_PARAMETER2, F
bcf MIOS_PARAMETER2, 7 ; clear 8th bit
;; now: pot number in WREG and MIOS_PARAMETER1
;; 7-bit value in MIOS_PARAMETER2
;; send CC
movlw 0xb5 ; 0xb5 = CC, channel 6
call MIOS_MIDI_TxBufferPut
movf MIOS_PARAMETER1, W ; pot number is the CC number
call MIOS_MIDI_TxBufferPut
movf MIOS_PARAMETER2, W ; 7-bit CC value
goto MIOS_MIDI_TxBufferPut
[/code]
in USER\_Init you have to specifiy the number of pots - thats all
Best Regards, Thorsten.