Side Project:
I played with the OLED display this week. With the data I have on the display that makes any sense, it should be working. I received sample code from the distributor I bought the display from. I modified it to work on arduino, and still no display. I may have damaged my display while probing the signals. I shorted Vdd to Vcc with my scope probe. I saw a little spark and I was no longer getting 13 Volts on Vcc
Included with the sample code is a schematic that has a drop down voltage regulator on it to drive Vcc. The drop down voltage regulator is configured to regulate to 6 Volts. However, the input to the drop down regulator is Vdd. According to the SSD1332 data sheet, Vdd should not exceed 3.6 Volts. This suggests that I have incomplete information. The datasheet also says that Vcc should be between 7 and 20 Volts.
I am thinking I will disable the switching regulator and do further testing while sending individual commands. I think I might try one of the 8 bit interfaces to see if I can write to and read from RAM. That will confirm the data interface is wired correctly.