test123

I created a full dump of this firmware. Please find it on below link(I think it expires in 7 days). https://www.transfernow.net/dl/20250614aP8PpIzR

   Some more pictures. Pin 18 goes to PSCK. Pin 15 to P7

Pulse train on PSCK and PSDA. In you code I see 700kHz for i2c but this is much slower: 24.46 Hz for one clock pulse. 

OK, so PSCK and PSDA are signals that are going to the LCD, correct? What are the right pins I should be probing to see if it's UART or i2c?...

> > Decoding that, there seems to be an issue still(or maybe it is not actual i2c). Start, h55 [ h2A | RD ] NACK, h97 NACK, hF7 NACK, h7B,...

> > It is repeating 9 bytes and I haven't see a chip select trace pin. > > You will need a dump of the initialization of this chip, if...

**Pinout of undetermined IC** pin function 1 vcc 2 vpp testpad 6 gnd 15 P7 testpad - LCD clock - 10khz 16 P11 testpad - LCD data 17 PSDA testpad...

Above data was making little sense, my Digital Discovery wasn't correctly decoding the bits.. First message(init): 0x55 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0x00 0xAA Second message(init): 0x55 0xFF 0xFF...

OK, so another small step made: 0x55 0xCB 0x7D 0x6D 0xA5 0x6D 0xF4 0xE7 0xAA 0x55 = start byte 1-6 = data byte 7 is checksum 0xAA = end If...

> How to distinguish between UART and SPI versions in the firmware program? I don't think you can. There is no return line from the display IC and I don't...