SmartGPU2-LCD480X320Touch-CommandSet

SMART GPU 2 3.5” TOUCH

Command Set

1.4 Splash Screen on Power Up

The Smart GPU 2 will wait up to 3 seconds with its screen in black, for the host to

transmit the Initial command (‘U’, 55hex). If the host has not transmitted this initial

command the module will display its splash screen. If the host has transmitted only the

initial command and has received a valid ACK, the screen will remain in black. This wait

period of the splash screen to appear, is to allow the user initialize the Smart GPU 2

before the welcome screen appears when it is undesired.

1.5 Understanding the Computer's graphic coordinate

system

As well as a computer monitor’s coordinate system, the Smart GPU 2 uses the

same universal coordinate system, on computer’s there’s only one positive coordinate

quadrant, and there’s no negative numbers or points. This quadrant is represented as

follows:

The upper left corner is 0,0 if we go right the X values increases, as we go down

the Y values increase.

This image shows a LANDSCAPE orientation of

the screen, the upper left corner is 0,0

(zero,zero). The maximum values of the SMART

GPU 2 in LANDSCAPE mode are X:479,Y:319.

This image shows a PORTRAIT orientation of

the screen, the upper left corner is 0,0

(zero,zero). The maximum values of the SMART

GPU 2 in PORTRAIT mode are X:319,Y:479.