Basic python3 script to display an image using SPI on SH1106 128 by 64 monochrome Oled display. (can be adapted to python 2.x)
Works on a Raspberry Pi 2 Model B Revision 1.1 1GB, with a Raspbian Strech version dated November 13th 2018. SPI interface has been enable using 'sudo raspi-config'.
once launched, ask for the file name to be used (can be .png; jpg..., any format supported by PIL).
If the picture is bigger than 128 x 64 pixels, only the upper/left part is displayed, note also that the picture is black and white converted.
Loading the display is quite fast (screen refresh rate is no visible,few msec) when using 1 MHz SPI clock speed. It becomes much more visible if you use lower clock speed:
- try to change the line "spi.max_speed_hz = 1000000"
to
- "spi.max_speed_hz = 7629"
What takes time is to prepare the display data from the input file (about 200 msec).
result can be seen at the end of this video : https://www.youtube.com/watch?v=bj6awnta67Y