Hello:=20

I am new to the list.=20
I am trying to complete the following project:

Convert MIDI data to a proprietary pre-MIDI format developed
by the Roland Corp. called Digital Communication Bus (DCB).
I want to do this using a PIC16F877-20MHz.

Physical layer:

MIDI- 31250 baud, 8-bit, start/stop bit, no parity, asynchronus serial
DCB- 31250 baud, 8-bit, start/stop bit, odd parity, asynchronus serial
=20
Data Conversion:

when a MIDI note is played it sends 3 word bytes: NOTE ON---NOTE =
VALUE----VELOCITY
when a MIDI note stops playing it sends 3 word bytes: NOTE OFF---NOTE =
VALUE----VELOCITY

examples: A) 10010000----00000111----00111111 (NOTE ON----NOTE VALUE---- =
VELOCITY)
                 B) 10000000----00000111----00111111 (NOTE OFF----NOTE =
VALUE---- VELOCITY)=20
     =20
I need to convert the above 3 words to this DCB format equivalent:

A)  11111110----10000111----ignore velocity  (KEY CODE----NOTE VALUE =
with GATE ON)
B)  11111110----00000111----ignore velocity  (KEY CODE----NOTE VALUE =
with GATE OFF)

****DCB does not recognize VELOCITY.=20
****KEY CODE is a constant, only the MSB of the second word changes for =
NOTE ON/NOTE OFF

What is the easiest way to accomplish this?
I just need to set-up INPUT/OUTPUT on the PIC and establish IF THEN =
cases.
Does this sound about right?
What should I use --C, BASIC, ASM?????

There would be no DAC or ADC. Just a opto-isolater on the MIDI input and =
IC gates on the
DCB output.

Any help is greatly appreciated.

Thank you very much.
Kevin Peek

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