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Watson Industries, Inc.
DMS-EGP01 Rev A 02/12/2015
24
Appendix C
Binary Data Format
The unit will output up to 6 words at 71.11 frames per second set at 9600 Baud. One word per output parameter.
Example 1: The Unit is seeing these conditions:
2) Binary output Format:
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Data Word
MSB
LSB
Bit 7 of the MSB is set to 1. Bits 6 to 0 of the MSB are the upper 7 bits of the data. (sign plus 6 bits of data)
Bit 7 of the LSB is set to 1. Bits 6 to 0 of the LSB are the lower 7 bits of the data.
As the data words are received, the LSB is shifted left to shift out the 7th bit (always set to 1). The MSB is then
connected to the LSB as a 16 bit word. This word is then shifted left to shift out the 7th bit (always set to 1). What
remains is a signed fractional word with a resolution of 13 bits plus a sign bit.
To convert binary data:
Need split each word into two bytes:
Remove the most significant bit from each byte:
Bank
Elevation
Heading
X angular rate
Y angular rate
Z angular rate
15.0˚
-5.0˚
315.0˚
10.0˚/sec
-15.0˚/sec
55.0˚/sec
Word1
Word2
Word3
Word4
Word5
Word6
<CR> byte
0x85AA
0xFE9C
0xF080
0x8399
0xFB99
0x91CC
0x0D
Bank
Elevation Heading X Rate
Y Rate
Z Rate
0x85AA
0xFE9C
0xF080
0x8399
0xFB99
0x91CC
Bank
Elevation Heading X Rate
Y Rate
Z Rate
0x85
0xAA
0xFE
0x9c
0xF0
0x80
0x83
0x99
0xFB
0x99
0x91
0xCC
Bank
Elevation Heading X Rate
Y Rate
Z Rate
0x05
0x2A
0x7E
0x1C
0x70
0x00
0x03
0x19
0x7B
0x19
0x11
0x4C