Fix contrast and display mode initialisation #1
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The double byte command OLED_CMD_SET_CONTRAST (SSD1306 datasheet rev 1.1 p.28) was followed by display_mode. So the contrast was set to 0xA6 or 0xA7 depending on the display mode configured and the display mode itself wasn't configurable.
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The double byte command OLED_CMD_SET_CONTRAST (SSD1306 datasheet rev 1.1 p.28) was followed by display_mode.
So the contrast was set to 0xA6 or 0xA7 depending on the display mode configured and the display mode itself wasn't configurable.