So Lets talk about the hardware more a little,
The Board has the following Main IC's on one side,
U2: Winbond w25q64f
U6: NXP/Phillips TJA1050
U7: LM393 comparator
Chip Type: ST7565
Model Type: ERC12864
Pixels:128 x 64
u8g2 header:- U8G2_ST7565_ERC12864_1_4W_SW_SPI
Well that's the gold doubloon's, now for some pieces of eight, well that comes as assorted 1AM NPN and 2A PNP transistors that provide the K-L Line and J1850 Bus ,
The K-Kline is made up of 3 pins, TX, RX and Inverted Bus Pin, This uses the SWDCLK pin and hardware UART.
The J1850 Bus is a Differential bus and uses software uart of the STM32,
full reversing of this is yet to be done,
Well, more logs to come but it's time to run.