NEO 2 Interface Developer’s Guide
476
19.3.35.
Start Screen Saver (61-50)
The command starts the screen saver, which is disabled when the touchpad is touched, the
customize screen is shown, or a transaction is started. The device reads the video from the inserted
SD Card; the video format must be MJPEG with a maximum frame width of 480px and maximum
frame height of 272px. Note that the video displays r90 degrees.
Command Frame
Byte 0-9
Byte 10
Byte 11
Byte 12
Byte 13
Bytes 14…
13+n
Byte 14+n
Byte 15+n
Header Tag &
Protocol
Command
Sub
Command
Length
MSB
Length
LSB
Data
CRC (LSB)
CRC (MSB)
ViVOtech2/0
61h
50h
see below
Response Frame
Byte 0-9
Byte 10
Byte 11
Byte 12
Byte 13
Byte 14
Byte 15
Header Tag &
Protocol
Command
Status
Length
MSB
Length
LSB
CRC
(LSB)
CRC
(MSB)
ViVOtech2/0
4Ch
See
00h
00h
Data Format
Item
Length(byte)
Data Field Description
Video File Name Variable
Video name string (no longer than 30 bytes)
ASCII string, terminated by 0x00
Example:
TX:
56 69 56 4F 74 65 63 68 32 00 61 50 00 08 6E 66 63 2E 61 76 69 00 FE
A8 (play the file “nfc.avi” from the SD card)
RX:
56 69 56 4F 74 65 63 68 32 00 61 00 00 00 4B 81 (request successful,
the video plays on the screen)
TX:
56 69 56 4F 74 65 63 68 32 00 61 50 00 08 6E 67 63 2E 61 76 69 00 9F
10 (play the file “nfc.avi” from the SD card)
RX:
56 69 56 4F 74 65 63 68 32 00 61 0A 00 00 8C 40 (error, the file
“ngc.avi” does not exist)