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CoMMunICAtIon ProtoCoL (ContInueD)
Checksum Calculation
unsigned char ComputeChecksum(string text)
{
unsigned char startInx, endInx, result;
startInx = Pos('$', text) + 1; //start at character after '$' in string
endInx = Pos('*', text) - 1; //end at character before '*' in string
result = 0;
for(int n = startInx; n < = endInx; n++)
{
}
return result;
}
Commands
The following table references the commands the DVR supports (Table 13). (Table continues
on the next page.)
CoMManD
DiReCtion
DSKDn
from DVr
DSKuP
from DVr
DSCDV
to DVr
DSIBt
to DVr
DSBtQ
to DVr
DSBtr
from DVr
DSfwQ
to DVr
DSfwr
from DVr
DSPKM
to DVr
DSPKD
to DVr
DSPKu
to DVr
48
MPC-ML2DVR-UM(A) 3/2015
result = result ^ text[n];
ReSPonSe
n/A
n/A
DSACK/DSnAK
DSBtr/DSnAK
DSBtr/DSnAK
n/A
DSfwr/DSnAK
n/A
DSACK/DSnAK
DSACK/DSnAK
DSACK/DSnAK
DeSCRiPtion
Key pressed
Key released (from press)
Change Display Video
Initiates IBIt System test (PSM)
requests last IBIt System test results
IBIt System test response
request firmware Version
firmware Version response
Program Key Mode
Program Key Down text Msg
Program Key up text Msg
table 13
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