Infocus C85 Benutzerhandbuch

Projector Control

Page 6

Version 1.

The Serial protocol returns an acknowledgment (“return code”) for every packet sent. If
the host sends a packet, then the projector acknowledge the receipt of this packet. The return codes are detailed in the table
below.

Command Return Code Name

Return Code Value

Description

ACK

0x06

Packet acknowledged – no errors. Normal
response when receiving

NAK

0x15

Packet not acknowledged – some error occurred in
receiving this packet. Usually
Indicates a CRC error.

ERR

0x1C 0xXXXX

Packet was received OK, but an error occurred
when executing the command contained in the
Packet. The two bytes following the 0x1C
(0xXXXX) are the error code

VAL

0x1D 0xXX 0xYY

Packet value returned. This return code will be
sent in response to a Operation packet of type
OPERATION_GET. The first byte after 0x1D
(0xXX), is the least-byte of the returned value. The
0xYY is the most significant-byte of the returned
value.

STRING

Strings 0x06

ASCII Strings and at last ACK

Host:                                   Projector
Operation Set Packet =>
                                   <=   ACK

Operation Get Packet =>
                                   <= VAL

VAL=0x1D 0x00 0x03 means that 0x0300 is returned

Host:

0xBE  0xEF 0x80 0x06 0x00 0x2E 0x04  0x01 0x00  0x11 0x00  0xB2 0x00

     Magic number      Body size

CRC

      Op.type     Function

  Value

7byte Message Head

6byte Message Body

Projector:
0x06