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Archibald 2018-02-02 05:13:05
Datasheet is available online which includes details of graphic acceleration commands for lines and rectangles. Library code is available online which includes text generation but I am simply using digitalWrite(pin, HIGH/LOW) to drive the 5 inputs of the display. With 6144 pixels, each requiring 2 bytes, it is necessary to clock in 98304 bits serially which can take a while (unless using graphic acceleration commands or only writing to a portion of the display area). Each pixel requires 5 bits for red, 6 bits for green and 5 bits for blue (assembled within 2 bytes) giving 65.536 possible colours. Using an ESP32 development board, I am downloading bitmap (.bmp) images from the internet via WiFi (having uploaded images of size 96 x 64 pixels). My code converts the three bytes for each pixel in .bmp files to the 2 bytes for each pixel required for the display. With the processor having 4Mbytes of flash memory, I am hoping to store up to about 300 images for the display (2 bytes per pixel).
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