experiment equipment:
Explorer STM32F4 Development Board

Purpose:
Learn the use of monochrome OLED displays

Hardware resources:
1, DS0 (connected to PF9)
2, ALIENTEK 0.96 inch OLED module (connect IO instructions, see oled.h file)

Experimental phenomena:
This experiment uses the OLED/CAMERA interface of the development board to connect the ALIENTEK OLED module to realize the display of the OLED module.
After successful loading, by inserting the OLED module into the OLED/CAMERA module interface in the lower left corner of the development board, after pressing the reset,
It can be seen that the OLED module continuously displays the ASCII code and code value.

Precautions: 
1. The OLED/CAMERA module interface of the development board is 2 more than the OLED pins, and the OLED can be inserted by the left.
2, the default 8080 mode to drive the OLED module, so the OLED module BS0, BS1 need to connect VCC (default VCC).