Hi. This is my first post on the forum
Today I openned my old Motorola C140 cellphone.
Then I got this idea, I'm trying to control the phone LCD screen.
I googled for motorola C140 and found some information about the LCD pins.
I soldered some wires, connected to my arduino +5v and the display turned on. yay \o/
Ok, now I'm trying to communicate with the LCD. I think (because of the "pin" names) it uses I²C, which I never used.
The pin names (according with some material I found) are:
(RESET) (VLCD) (VSS) (SA0) (SDA) (SCL) (RES) (VDD)
I connected SDA to my arduino's SDA and SCL to SCL.
VDD to +5v and VSS to GND (on the arduino).
I tryed to send random data to the LCD (hoping random bits to appear on the screen), but nothing happend
I searched a bit more, and discovered that VLCD is the LCD supply, so I connected +5v to it.
By doing this, the LCD turned off (also my arduino). (maybe short circuit?).
I also found that SA0 is the bit 0 of the I²C address (to use 8 bits instead of 7? don't know.), but I don't know what do I do with that.
So, my question is: Can anyone help me with this I²C stuff? Where do I put the SA0 pin? How do I properly connect this VLCD? I also don't know if there is a default instruction set for LCD's (like, to send instructions to it).
Also, I'm not using any component (like pull up resistors). I don't know if that's very important.
One more thing, I don't know if helps, but the LCD is a "toppoly TD014THEA3".