Pseudo Random Number Generator - Dalsa 1M28-SA User Manual

1M28, 1M75, and 1M150 User's Manual
Pseudo Random Number Pseudo Random Number Pseudo Random Number Pseudo Random Number
Generator Generator
Generator Generator
In order to test the interface between camera and framegrabber, a 10bit LFSR (linear feedback shift
register) with a "many-to-one" feedback structure has been implemented [SMITH00]. For a
maximum sequence length of 1023 states, an XOR feedback at tap 2 and 9 was implemented
(VHDL implementation, see below). The state 0 does not exist in this implementation. The
sequence starts with the value 1 at the beginning of every line. The first 256 are shown in Table
16. The result is a pattern of vertical stripes in the captured picture. (See Figure 32: Captured
picture with active 10bit LFSR.)
Table 34: States 0 – 127 of the pseudo random number generator
Nr. HEX BINARY
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
DALSA
PRELIMINARY
Nr. Hex BINARY
001 1000000000 32 331
002 0100000000 33 263
004 0010000000 34 0C7 1110001100 66
009 1001000000 35 18F
012 0100100000 36 31F
024 0010010000 37 23E
049 1001001000 38 07C 0011111000 70
092 0100100100 39 0F9
124 0010010010 40 1F2
249 1001001001 41 3E4
093 1100100100 42 3C8 0001001111 74
126 0110010010 43 391
24D 1011001001 44 323
09A 0101100100 45 247
134 0010110010 46 08E
269 1001011001 47 11D 1011100010 79
0D3 1100101100 48 23B 1101110001 80
1A6 0110010110 49 077
34D 1011001011 50 0EF 1111011100 82
29A 0101100101 51 1DF 1111101110 83
135 1010110010 52 3BF 1111110111 84
26B 1101011001 53 37E
0D7 1110101100 54 2FC 0011111101 86
1AF 1111010110 55 1F8
35F 1111101011 56 3F0
Appendix D Appendix D Appendix D Appendix D
Nr. HEX BINARY
1000110011 64 0E0 0000011100 96
1100011001 65 1C0 0000001110 97
380 0000000111 98
1111000110 67 301 1000000011 99
1111100011 68 203 1100000001 100 2CA 0101001101
0111110001 69 007 1110000000 101 195
00F 1111000000 102 32B
1001111100 71 01F 1111100000 103 257
0100111110 72 03F 1111110000 104 0AE 0111010100
0010011111 73 07F 1111111000 105 15D
0FF 1111111100 106 2BB 1101110101
1000100111 75 1FF 1111111110 107 177
1100010011 76 3FF 1111111111 108 2EF
1110001001 77 3FE 0111111111 109 1DE 0111101110
0111000100 78 3FC 0011111111 110 3BD 1011110111
3F8 0001111111 111 37A
3F1 1000111111 112 2F5
1110111000 81 3E3 1100011111 113 1EA 0101011110
3C7 1110001111 114 3D4
38E 0111000111 115 3A8
31C 0011100011 116 351
0111111011 85 238 0001110001 117 2A3
071 1000111000 118 147
0001111110 87 0E2 0100011100 119 28F
0000111111 88 1C4 0010001110 120 11E 0111100010
69
Nr. HEX BINARY
0EC 0011011100
1D9 1001101110
3B2 0100110111
365 1010011011
1010100110
1101010011
1110101001
1011101010
1110111010
1111011101
0101111011
1010111101
0010101111
0001010111
1000101011
1100010101
1110001010
1111000101
03-32-00525-04