Hello all!
Just got a new shipment today which included a 0.96" Blue and Yellow OLED Screen that is interfaced over I2C. Amazingly, for $10, the manufacturer had enough sense to pretty much backpack the outputs to just VCC (3-5VDC), GND (ground), SCL (clock) and SDA (digital, I think?). I am in the final stages of a Arduino based project and so I also received a replica of the chip on the Uno, pre-programmed with Arduino bootloader/OS/whatever you'd like to call it and a blink sketch. It also came with a convenient Addicore pinout sticker for the actual microprocessor which I applied.
I haven't ever used IIC/I2C or interfaced any screen besides a 4 digit clock. I hooked up the GND and VCC accordingly but I can't help but to notice that the SCL and SDA pinouts are non-existent on the standalone Atmega that I have. After further reading, I found that they were added pins available on the Uno not normally present on the standalone 328P-PU. I read a little more and found a possibly outdated 2010 blog that said you should use Analog 4 for SDA and 5 for SCL, but I need this confirmed. Is there anything else I need to do? Just wire it directly? I don't need any resistors or to change any of the packages/code in Adafruit's SSD1306 Library?
Basically my question is: How do I interface an IC2 OLED Screen from my bare Atmega328P-PU since there are not SDA or SCL pinouts?
Thanks and regards,
Chris Kuhn
Screen (datasheets in desc.): http://www.amazon.com/gp/product/B00O2LLT30