SmartGPU2-LCD480X320Touch-CommandSet

SMART GPU 2 3.5” TOUCH

Command Set

1.-Host Interface

The Smart GPU 2 is a slave peripheral device and it provides a bidirectional

serial interface to a host controller via its USART(Universal Serial Asynchronous

Receiver - Transmitter).

Any microcontroller or processor (AVR, PIC, BASICstamp, XXDUINO, raspberry

PI, 8051, MBED, FPGA, ARM, STmicro, etc) or PC(by serial interface RS232) as host,

can communicate to the device over this serial interface from 9600bps up to

2000000bps.

The Smart GPU 2 doesn't need to be configured in any way; it's a plug-and-play

device, could be used by students, up to industrial and professional applications, its

compatible with any device and existing development board with a USART/UART.

The serial protocol is universal and very easy to implement.

Serial Data Format: 8 Bits, No Parity, 1 Stop Bit.

BaudRate: 9600 bps (default; could be changed).

Serial data is true and not inverted.

1.1 Command Protocol : Flow Control

The Smart GPU 2 Intelligent Graphics Processor Unit is a slave device and all

communication and events must be initiated first by the host. Commands consist of a

sequence of data bytes beginning with the command/function byte.

When a command is sent from host to the device, this process the command and

when the operation is completed, it will always return a response*. The device will send

back a single acknowledge byte called the ACK (4Fhex, ‘O’ ascii), in the case of

success, or NAK (46hex, ‘F’ ascii), in the case of failure or not recognized command.

* Commands having specific responses may send back varying numbers of bytes, depending upon the command and

response. It will take the device a certain amount of time to respond, depending on the command type and the

operation that has to be performed.