Check out the German BMW Ibus here... http://everything2.com/title/BMW+I-Bus
CDRIVE;182548 The Input is labeled CNTR which tells me that it counts pulses. A Decimal to Serial (Hex) converter comes to mind. Unfortunately I'm not Adrian Monk said:it actually says CNTRL < short for Control......
NOW I understand what it does....... thats what the TUNER output is, it is just a radio tuner/display controller......Description
The I-Bus was originally intended to handle the needs of the radio, telephone and onboard navigation systems inside the car cabin. It was first available in the 1997 model year, and is now on every car BMW ships, including the popular Mini Cooper. The presence of the I-Bus is what allows BMW to put their navigation computers and, in fact, their stereo systems and amplifiers in the rear of their vehicles, leaving only a slightly-intelligent head unit in the cabin. This head unit does little more than turn control actions (button presses, knob turns, etc.) into I-Bus messages, and display I-Bus-encoded status information (radio channel, CD track names, etc.) on the MID, if available. This is why replacing the stock stereo in modern BMWs can be such a headache.
The I-Bus is based on the K-Bus protocols and hardware. It is, at its most physical, a single wire bus which is run to several points in the car. Various devices can be plugged into this wire, and signals put onto the wire are visible to all other devices plugged into it. Signal contention is the responsibility of each individual device. Bus speed is fairly pokey, at the geek-familiar 9600 bps 8E1 (8 data bits, Even parity, 1 stop bit) - which means the I-Bus is really limited to control data, and cannot be used to stream digital media or for any other such broadband application. The bus itself, as a single wire, is pulled high to +12V - the battery voltage of the car - and pulled low (ground) by the talking device. The wire used for the I-Bus is color-coded white/red/yellow.
Is this a commercial product? How did he program the PIC? It must have been programmed in a specialised adapter before soldering. The SMD work is all reflow oven soldered too indicating a commercial product. For someone who has worked on this for "weeks" I feel you are not being straight with us.
Young feller you're a gonna have old worn out eyes someday too!it actually says CNTRL < short for Control......
Young feller you're a gonna have old worn out eyes someday too!
Hey, I got Tuner right and 1 outa two aint bad!