SPI 0.91 Only 3 pins?

Other Hardware Displays
1

Hey forummers!

After a weekend long of searching, I decided to post my question here. Hope someone can help me out :confused: For example, I tried the tips in this thread SPI 0.91" 128x32 5 pin GND VCC DIN CLK DC - Displays - Arduino Forum

For my project, I purchased a SPI 0.91 inch OLED display via Ebay (http://www.ebay.com/itm/281900023759). This display I would like to use with the U8g or Adafruit libraries, but I can not find out how to connect the screen to my Nano and make it light up. Even a "Hello World" would be nice now :slight_smile: :slight_smile:

It has pins for GND and 5V, CLK, DIN and DC. I als have no clue what constructor will work for this. My guess is 1306, who knows?

Thanks for your kind replies and willingness to support me and my project!

2

You will use either of these constructors:

//U8GLIB_SSD1306_128X32 u8g(13, 11, 10, 9);	// SW SPI Com: SCK = 13, MOSI = 11, CS = 10, A0 = 9
//U8GLIB_SSD1306_128X32 u8g(10, 9);             // HW SPI Com: CS = 10, A0 = 9 (Hardware Pins are  SCK = 13 and MOSI = 11)

I would be 100% certain that this display needs 3.3V logic. Examine what chips are actually on the pcb.

DIN = MOSI
CLK = SCK
DC  = A0

You don't seem to have a CS pin. This subject has come up before. It means you can not have multiple SPI devices on the SPI bus.

David.

3

Thanks David!
I think you're right about the 3.3v, the screen is completely black where it used to be blue-ish... Seems that the 3.3v~5v mentioned by the seller comes down to 3.3 only ;-(

In the mean time, I got another display to work. It's too big for my project, but a good starting point.

:: Thumbs up to your quick help ::