Using Commands and Logs
Chapter 4
EuroPak-15a Receiver User Manual Rev 5
39
Table 9: Byte Arrangements
4.4.2
Commonly-Used Fields
Some of the more commonly-used fields are discussed in this section.
4.4.2.1
Serial Port Identifiers
The values used to indicate serial ports are given below.
Table 10: Serial Port Identifier Values
4.4.2.2
Message Type Indicator
The
Message Type Indicator
is a byte given in numerous binary format messages and all binary headers. It
below.
Table 11: Message Type Byte Format
7
0
char
address n
15
7
0
short
n + 1 address n
31
23
15
7
0
long
tw o's compliment
n + 3
n + 2
n + 1
address n
63 62
52 51
0
double
S
Biased Exponent|
52-bits mantissa
n + 7
n + 6
n + 5
n + 4
n + 3
n + 2
n + 1
address n
31 30
23 22
0
float
S
Biased Exponent| 23-bits mantissa
n + 3
n + 2
n + 1
address n
ASCII
Binary
COM1
32
COM3
96
Bit
Description
0-4
Reserved
5-6
Message format, where
00 =
Binary
01 =
ASCII
10 =
Abbreviated ASCII
, NMEA
11 = Reserved
7
Response indicator, where
0 = original message
1 = response message.
information on logging data.)