SSD1306 OLED dipslay on olimexino STM32

Posted on Fri 6th, June 2014

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• #26

bigplik

but I have I2C adapter for HD44780, should I connect 3 pin to GND as well?
• #27

Gordon

No, sorry - I got confused with someone who posted here who'd got the HD44780 working by wiring it up in parallel.

Does your LCD have a small potentiometer on it for contrast? It could be it's making bad contact.
• #28

bigplik
it is working but display is doing little flash when changing values
i used this example
```
function showData() {
 lcd.clear();
 lcd.setCursor(0,0);
 lcd.print("Current data:");
 lcd.setCursor(4,1);
 lcd.print("D1 = "+analogRead(D1));
}
setInterval(showData, 1000);
```
I think it should only flash in section where the D1 value is, not all display?
• #29

Gordon

I don't know, I guess it might depend on the display - maybe you could post up a video of it?
• #30

bigplik

this is how it looks on maple board
https://drive.google.com/open?id=0BzvGs-oFJWtTTUZSRVdZMk16b28
and here on the arduino uno - sorry LQ
https://drive.google.com/open?id=0BzvGs-oFJWtTakxBWVZRUko3Y0k
• #31

bigplik

I figured out ;)
need to delete lcd.clear() line and now only values are changing not all signs
• #32

Gordon

Ahh - great! I should have spotted that ;)

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