SmartGPU2-LCD480X320Touch-CommandSet

SMART GPU 2 3.5” TOUCH
Command Set
Vizic Technologies ©2014 89
2.8.2 Get Touch Icons – 49hex - I ascii
Commands (host)
1 byte
1.- 0x54 (hex), T (ascii). *Touch command.
2.- 0x49 (hex), I (ascii).
Responses (device)
1 byte + 1 byte ACK/NAK
1.- Icon Name First Capital Letter.
2.- 0x4F (hex), O (ascii) – success ACK or
0x46 (hex), F (ascii) – fail NAK.
Description
This Command performs a reading on the
touchscreen panel and responds immediately
the current reading in that specific time.
When the command is called and a valid
touch on the touchscreen Icons is
read/obtained, the SmartGPU 2 will respond
with the Name First Capital Letter of the Icon
followed by an ACK(means valid touch on
Icon).
If during the command call, no valid touch
on the touchscreen Icons is present,
SmartGPU 2 will respond ‘N’(ascii) followed by
a NAK(means no valid touch on Icons).
Possible responses:
If no touch:
‘N’ - None – 4E, 46
Touch on Home Icon:
‘H’ - Home – 48, 4F
Touch on Message Icon:
‘M’ - Message – 4D, 4F
Touch on Book Icon:
‘B’ - Book – 42, 4F
Touch on Phone Icon:
‘P’ – Phone – 50, 4F
Touch on Song/Note Icon:
‘S’ - Song – 53, 4F
If a simple wait until valid point / touch on
screen is needed, user can call this command
repeatedly until an ACK with a different than
‘N’ None Icon is obtained.