SmartGPU2-LCD480X320Touch-CommandSet

SMART GPU 2 3.5” TOUCH

Command Set

2.2.5 BaudRate Change – 58hex - X ascii

Commands (host)

6 bytes

1.- 0x4D (hex), M (ascii). *Master command

2.- 0x58 (hex), X (ascii).

3.- Baud Rate High Byte.

4.- Baud Rate Medium High Byte.

5.- Baud Rate Medium Low Byte.

6.- Baud Rate Low Byte.

Responses (device)

1 byte when fail, 2 bytes when success

1.- 0x4F (hex), O (ascii) – success ACK at actual

baud rate.

--Delay of 500ms.

2.- 0x4F (hex), O (ascii) – success ACK at new

baudrate.

1.- 0x46 (hex), F (ascii) – fail NAK at actual baud

rate.

Description

Command needed to set a different baud rate, the

command sent by the host must be at the actual

baud rate that is being used; if the command is

invalid a NAK will be responded by the SMART GPU

and the baud rate will not be modified.

If the command is accepted an ACK will be received

at the actual baud rate then SMART GPU will change

to the new baud rate during 500ms and then it will

send another ACK at the new baud rate selected.

Only when an ACK has been received by the host,

the next commands must be sent at the new baud

rate defined.

Default reset - power on baud rate is 9600.

Example (sent commands)

Example 1:

<4D,58,00,01,C2,00> Set 115200 bps baud.

Example 2:

<4D,58,00,1E,84,80> Set 2000000 bps baud.

All data is in hex.