NavCom LAND-PAK Rev.N - Manual (Page 107)

Technical Reference Manual Rev. N
Blk = All; Blu = IOP w/Internal Radio ; Red = IOP & LBM ; Grn = Engine only
105
After all sectors have been retrieved, send command 0x7e.0x0a (Close File).
Request
Record
Usage Command - Yes
Response - No Input: file record request, see 0x7e.0x08 first;
Output: see table below
Ref Message Field Description Data Type Units Range Scale Byte Count
STX 02 (hex) U08 1
PRA1 99 (hex) U08 1
PRA2 66 (hex) U08 1
ID 7e(hex) U08 1
Length 0xXXXX U16 2
W1 Sub ID 0x09 U08 1
W2 0x00 (request) U08 1
W3 File Handle U16 2
W4 Sector Number U32 4
W5 Spare U08 1
CKSM Checksum U08 1
ETX 03 (hex) U08 1
Response
Record
Usage Command - No
Response - Yes Input: see table above;
Output: contains contents of requested file and sector
Ref Message Field Description
Data
Type
Units Range Scale
Byte
Count
STX 02 (hex) U08 1
PRA1 99 (hex) U08 1
PRA2 66 (hex) U08 1
ID 7e(hex) U08 1
Length 0xXXXX U16 2
W1 Sub ID 0x09 U08 1
W2 0xff (response) U08 1
W3
Result
B0=1: Invalid file handle
B1=1: Requested sector number out of range
B2=1: Unable to read file
B7=1: Memory Mount Failure
The rest of the bytes appear only if W3 = 0
U08 1
W4 Spare U08 1
W5 File Handle U16 2
W6 Sector Number U32 4
W7 Number of Bytes in W8 U32 0 - 512 4
W8 File data
U08
[512]
1[512]
CKSM Checksum U08 1
ETX 03 (hex) U08 1