SmartGPU2-LCD480X320Touch-CommandSet

SMART GPU 2 3.5” TOUCH

Command Set

The SMART GPU 2 contains a 230,400bytes (1,843,200bits) internal memory,

that stores the current display image on the screen, the command Memory Read,

allows the host to be able to read this internal memory in order to know the value of the

pixels or what is being displayed in some area or the full screen at that particular

moment.

The colour convention for this memory read command is RGB888, instead of the

RGB565, this is in order to avoid quality and colour depth loss, and also the images that

are read from the SD card are in RGB888 convention.

The colour parameter needed on Memory Read command consist of 24bits (3 bytes) RGB888:

R7R6R5R4R3R2R1R0 G7G6G5G4G3G2G1G0 B7B6B5B4B3B2B1B0

That is:

8bits for red, 8 bits for green, 8bits for blue.

High byte colour: R7R6R5R4R3R2R1R0

Medium byte colour: G7G6G5G4G3G2G1G0

Low byte colour: B7B6B5B4B3B2B1B0