Unofficial Behringer Control Development Kit

Willem van Engen has released a development kit which allows you to develop  alternative firmware for the Behringer BCR2000.

The Unofficial Behringer Control Development Kit can be found  here.

I have done some stuff with the WinARM toolchain and I am curoius to find out how much work is involved making firmware for a BCR2000 as a USB HID.

You can see what is inside a BCR2000 here .

Behringer BCR2000

The BCR2000 is a midi controller from  Behringer . You can use it to modify midi parameters with pushbuttons and rotary knobs.

The BCR2000 is not really expensive (current price (Sept 2010) is 139,- euro from  feedback). It has a few minor drawbacks like the infamous “wobbly knobs”.

All rotary encoders have a string of leds as indicators. I had expected Behringer would have used prefab modules with switch and LEDs for this from Bourns or Avago and was surprised to see this was not the case. All rotary knob and led parts are built up from separate parts. The BCR2000 consists of an amazing number of parts.

The BCR2000 has a swichmode power supply an d 3 other PCB-s.

Power supply

Lower Board

6 x HC574 “Octal Edge-Triggered D-Type Flip-Flops With 3-State Outputs”
4 x HC273 “Octal D-Type Flip-Flops With Clear”
6 x HC163 “4-Bit Synchronous Binary Counters”
1 x HC138 “3-Line To 8-Line Decoders/Demultiplexers”

Upper Board

2 x HC165 “8-Bit Parallel-Load Shift Registers”

CPU Board

1 x PDF OKI L671000: An ARM7TDMI CPU with full speed USB and UART, handy for MIDI.
1 x TMS 418160DZ, a 2 MB DRAM. The CPU apparently has DRAM Refresh logic on board.
1 x HCT04 “Hex Inverters”
1 x H11L1 “6-Pin DIP Schmitt Trigger Output Optocoupler” for the receiving side of the MIDI current loop.
1 x HCT245 “Octal Bus Transceivers With 3-State Outputs”

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