Front Panel protocol - PC-Tuner control
I have a Pioneer DEH3700MP and I wonder if it's possible to make an front panel using a 8051 microcontroller (or maybe a PIC). So I can put the keys to control my tuner at any place and use a DOT MATRIX display.
Does anyone know the communication protocol between the tuner and the front panel ? I've take a look at the Pioneer schematics and seems to be an assyncronous protocol with a TX (KYDT - Keyboard data ?) and RX (DPDT - Display data?) lines.
With this protocol maybe will be possible to control the unit with a PC. so the radio and MP3 Player functions will be handdle by the unit and the PC will be free for other tasks.
Here the diagram of the front pannel circuit (with 8051):