These OLEDs are passively drawn, which means that each line is lit at once. These displays are fairly inexpensive and simple, but as a tradeoff the built in boost converter has to drive all the OLED pixels at once. If you have a line with almost all the pixels lit it wont be as bright as a line with only 50% or less lit up.
Don't forget you must call .display() to actually write the display data to the display. Unlike many of our TFTs, the entire display must be written at once so you should print all your text and draw all your squares, then call display()
Open up Adafruit_SSD1305.cpp in the libraries/Adafruit_SSD1305 folder and find these lines
static uint8_t buffer[SSD1305_LCDHEIGHT * SSD1305_LCDWIDTH / 8] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
....
0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01
};
and delete everything after static uint8_t buffer[SSD1305_LCDHEIGHT * SSD1305_LCDWIDTH / 8] = {
and before };
Page last edited August 07, 2015
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