SmartGPU2-LCD480X320Touch-CommandSet

SMART GPU 2 3.5” TOUCH

Command Set

2.4.4 Display String SD – 46hex - F ascii

Commands (host)

14 bytes + text file name + 1byte(NULL)

1.- 0x53 (hex), S (ascii). *String Command.

2.- 0x46 (hex), F (ascii). –from SD .txt File

3.- X1 coord high byte.

4.- X1 coord low byte.

5.- Y1 coord high byte.

6.- Y1 coord low byte.

7.- X2 coord high byte.

8.- X2 coord low byte.

9.- Y2 coord high byte.

10.- Y2 coord low byte.

11.- Start Character (position) high byte.

12.- Start Character (position) low byte.

13.- Characters to Read (from position) high byte.

14.- Characters to Read (from position) low byte.

11 up to N (file name).

N+1.- 0x00 (hex) NULL ascii.

Responses (device)

SPC(2 bytes) + 1 byte ACK

1.- SPC high byte

2.- SPC low byte

3.- 0x4F (hex), O (ascii) – success ACK.

0x46 (hex), F (ascii) – fail NAK.

*SPC stands for Successfully Printed Chars.

Description

This command calls a text file stored on the micro SD card and

displays the contained text on an imaginary text box created with

the given points: X1(16bit), Y1(16bit) as top left corner and

X2(16bit), Y2(16bit) as bottom right corner.

The text or string is automatically adjusted to fit in this defined

text box, if the text is longer to fit in the text box, it will stop

discarding all the rest of the String. The command always return

the SPC(successfully printed bytes), this way user can determine

how many of the chars fitted and were printed on the received text

box.

The Start Character parameter means, the number of bytes that

will be jumped from the start of the file, including spaces. If this

parameter is zero (0x0000)hex, the file will be read and displayed

from the beginning.

The Characters to Read parameter means: the number of bytes

that will be read up from the Start character position. When this

parameter is zero (0x0000)hex, mini SmartGPU will try to read all