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我看规约里有个CRC校验表,那个表是如何得到的,我查了相关资料,有的人代码把那种校验码叫正码,谁能指点下,搞不定了?现在行业常用的都是反码,这个反码表我能计算出来!
% A, S* ?- z7 O Q
7 O: g+ k4 M W& X3 X本规约采用CRC校验,控制字和信息字都是(n、k)=(48,40) 码组,生成多项式为* `& X7 |# ]& H* H
G(X)=X8+X2+X+1,陪集码为FFH。按4.2条所述发码规则的顺序以 G(X)模2除前5个字节,生成余" n& ^, p8 A/ H6 y# c) h7 |/ T
式R(X)。以R(X)作为校验码。若用查表法,信息字、控制字基本码元的中间余式见
) K, H ?& L1 [' i6 M) I; B 表1 中间余式表
1 t7 }2 \7 w& L L% H信息字、控制字的码元 查表法中间佘式 $ g% q: m K7 B; i9 b3 V
01H 1110 0000B / g) F5 }0 e" H( M! H# S( a$ Z8 G
02H 0111 0000B ) n+ G- C$ }# V7 ^: T+ V( r
04H 0011 1000B
, d) y- `% L4 E$ w08H 0001 1100B # u. ]* I1 t$ V3 c
l0H 0000 1110B + m& l/ @; n" h- S, Q2 r. ~
20H 0000 0111B % f2 G: y7 J9 T
40H 1110 0011B
% a1 R0 a+ `% \80H 1001 0001B % a; G( {2 y0 `1 X$ Y
uint8 CRC8_Check_Table_XXX[256] = 这是正码表,和规约一致的,(正码表,不知是如何计算出来的,求方法)
4 |: v* ?* K% s4 f3 w; E" ?6 |{ 0x00,0xE0,0x70,0x90,0x38,0xD8,0x48,0xA8,
1 `4 n R% X& ^6 @ r+ ] 0x1C,0xFC,0x6C,0x8C,0x24,0xC4,0x54,0xB4,
- e. B) A! ^5 l 0x0E,0xEE,0x7E,0x9E,0x36,0xD6,0x46,0xA6,
0 z" e) U) ?0 u5 U$ X 0x12,0xF2,0x62,0x82,0x2A,0xCA,0x5A,0xBA,9 {0 _1 `8 G1 A3 R/ G: s
0x07,0xE7,0x77,0x97,0x3F,0xDF,0x4F,0xAF,
- J# |6 e q) Q- r( z 0x1B,0xFB,0x6B,0x8B,0x23,0xC3,0x53,0xB3,
5 ^* a$ q% x/ O 0x09,0xE9,0x79,0x99,0x31,0xD1,0x41,0xA1,/ p- h0 O" d& w% p
0x15,0xF5,0x65,0x85,0x2D,0xCD,0x5D,0xBD,( D. w# j8 T) i2 H0 m
0xE3,0x03,0x93,0x73,0xDB,0x3B,0xAB,0x4B,
. T2 q) `$ N* Z, {( [' ? 0xFF,0x1F,0x8F,0x6F,0xC7,0x27,0xB7,0x57,6 X) t l- D$ `, @+ j* R# N- ^4 Z
0xED,0x0D,0x9D,0x7D,0xD5,0x35,0xA5,0x45,
! v H0 Y/ A. u( K$ r$ y 0xF1,0x11,0x81,0x61,0xC9,0x29,0xB9,0x59,
, b: \0 X7 _, r. D; u+ a: U 0xE4,0x04,0x94,0x74,0xDC,0x3C,0xAC,0x4C,* ?- x8 i& h6 r% @; K/ B# Q
0xF8,0x18,0x88,0x68,0xC0,0x20,0xB0,0x50,/ f Z2 F. O) U$ O2 h; q+ b0 H
0xEA,0x0A,0x9A,0x7A,0xD2,0x32,0xA2,0x42,% t: |. L! { h5 p# z t# m2 ?
0xF6,0x16,0x86,0x66,0xCE,0x2E,0xBE,0x5E,
- ~ H$ u3 k( E 0x91,0x71,0xE1,0x01,0xA9,0x49,0xD9,0x39, r8 S: t5 j j1 ^, ?
0x8D,0x6D,0xFD,0x1D,0xB5,0x55,0xC5,0x25,9 W: L* q4 s: K5 S
0x9F,0x7F,0xEF,0x0F,0xA7,0x47,0xD7,0x37,, Q; p% g# B( d
0x83,0x63,0xF3,0x13,0xBB,0x5B,0xCB,0x2B,
0 I$ L# t$ g' u; t 0x96,0x76,0xE6,0x06,0xAE,0x4E,0xDE,0x3E,+ M) y& k o' R H
0x8A,0x6A,0xFA,0x1A,0xB2,0x52,0xC2,0x22,
7 O$ `( Y+ O- O( V% Q. g2 o3 z 0x98,0x78,0xE8,0x08,0xA0,0x40,0xD0,0x30,
) V( @5 V& O: c& }& U5 V 0x84,0x64,0xF4,0x14,0xBC,0x5C,0xCC,0x2C,
d6 J! L4 x, L+ s/ K* V 0x72,0x92,0x02,0xE2,0x4A,0xAA,0x3A,0xDA,
, O H ^0 f: D. \* r 0x6E,0x8E,0x1E,0xFE,0x56,0xB6,0x26,0xC6,! Y' J( b4 G4 u6 f
0x7C,0x9C,0x0C,0xEC,0x44,0xA4,0x34,0xD4,- n- ?% Q/ g) l2 ~; K5 }6 ~
0x60,0x80,0x10,0xF0,0x58,0xB8,0x28,0xC8,
$ ]. |1 X4 G' Q) Z6 Q7 o- U 0x75,0x95,0x05,0xE5,0x4D,0xAD,0x3D,0xDD,
) m1 f$ l& N2 j1 S* k3 y% @7 \ 0x69,0x89,0x19,0xF9,0x51,0xB1,0x21,0xC1,
$ [3 u5 c: C8 L4 h" x 0x7B,0x9B,0x0B,0xEB,0x43,0xA3,0x33,0xD3,
( x5 L+ N* `" J+ z9 ~' Y 0x67,0x87,0x17,0xF7,0x5F,0xBF,0x2F,0xCF},5 V4 l0 t: j% Y' u- c9 B+ H. |4 ~/ @
1 y N% v! {0 q( y9 g- A, x$ l4 ~咱们常用都是反码表
) m& e- V0 a6 s, Uuint8 CRC8_Check_Table_XXX[256] = {
2 P6 n( I" f/ {3 |, n 0x00,0x07,0x0e,0x09,0x1c,0x1b,0x12,0x15,
7 M k/ N7 P- E2 o 0x38,0x3f,0x36,0x31,0x24,0x23,0x2a,0x2d,//0
) n* _, p. K" C' ^0 p9 v) D M& V 0x70,0x77,0x7e,0x79,0x6c,0x6b,0x62,0x65,
) k) Y0 ? v+ y3 R7 k; m6 a1 M. J 0x48,0x4f,0x46,0x41,0x54,0x53,0x5a,0x5d,//14 m( u: j3 ^0 |& J2 k, I4 G5 d
0xe0,0xe7,0xee,0xe9,0xfc,0xfb,0xf2,0xf5,6 s( }* g+ W6 G+ E9 ]/ O
0xd8,0xdf,0xd6,0xd1,0xc4,0xc3,0xca,0xcd,//2
' X- M/ s. a) k- p$ G- L, s 0x90,0x97,0x9e,0x99,0x8c,0x8b,0x82,0x85,
- r$ L- U* e3 }/ y5 T) z 0xa8,0xaf,0xa6,0xa1,0xb4,0xb3,0xba,0xbd,//3
5 U: l) [+ O" x( f7 v$ ^' m 0xc7,0xc0,0xc9,0xce,0xdb,0xdc,0xd5,0xd2,
9 A' m& {1 W, f7 N' w: J3 E 0xff,0xf8,0xf1,0xf6,0xe3,0xe4,0xed,0xea,//4
" y5 X( u7 J1 t; w& d3 F1 D! ?8 k 0xb7,0xb0,0xb9,0xbe,0xab,0xac,0xa5,0xa2,
4 }, ~' g" f) l9 M 0x8f,0x88,0x81,0x86,0x93,0x94,0x9d,0x9a,//5
\# [$ p3 o. f5 x% A8 v6 N 0x27,0x20,0x29,0x2e,0x3b,0x3c,0x35,0x32,
9 \: h' Q; Q$ U6 W1 J1 E. { u8 p 0x1f,0x18,0x11,0x16,0x03,0x04,0x0d,0x0a,//6
0 {9 X/ R/ R7 p+ C+ B 0x57,0x50,0x59,0x5e,0x4b,0x4c,0x45,0x42,
! X- q2 h" z/ z% k; G( K4 q 0x6f,0x68,0x61,0x66,0x73,0x74,0x7d,0x7a,//7
- R7 V; t0 P+ a4 b0 U 0x89,0x8e,0x87,0x80,0x95,0x92,0x9b,0x9c,( G: l4 a+ y' j2 a \
0xb1,0xb6,0xbf,0xb8,0xad,0xaa,0xa3,0xa4,//82 ]# J9 c5 f7 \2 t/ H% \
0xf9,0xfe,0xf7,0xf0,0xe5,0xe2,0xeb,0xec,
' z- @1 g: O* S 0xc1,0xc6,0xcf,0xc8,0xdd,0xda,0xd3,0xd4,//9% w7 h5 Y+ q+ T/ u& ?3 Y' J5 Y
0x69,0x6e,0x67,0x60,0x75,0x72,0x7b,0x7c,
: S1 {! E: L7 \3 N# O: G 0x51,0x56,0x5f,0x58,0x4d,0x4a,0x43,0x44,//a
3 a/ t, A4 x! u: R 0x19,0x1e,0x17,0x10,0x05,0x02,0x0b,0x0c,: D# _% ^+ O# f
0x21,0x26,0x2f,0x28,0x3d,0x3a,0x33,0x34,//b
' u; n* d$ m8 \ 0x4e,0x49,0x40,0x47,0x52,0x55,0x5c,0x5b,+ ?2 B; x, y$ X( q2 `' X
0x76,0x71,0x78,0x7f,0x6a,0x6d,0x64,0x63,//c
, J! H4 e" u6 @, |, ^1 v7 I 0x3e,0x39,0x30,0x37,0x22,0x25,0x2c,0x2b,
' \1 t; q) h& B, l8 r 0x06,0x01,0x08,0x0f,0x1a,0x1d,0x14,0x13,//d
! x; F) {2 `2 D2 ? 0xae,0xa9,0xa0,0xa7,0xb2,0xb5,0xbc,0xbb,6 P3 S% p% n: r6 p$ H
0x96,0x91,0x98,0x9f,0x8a,0x8d,0x84,0x83,//e ~1 Z$ O% I/ Q9 R, g
0xde,0xd9,0xd0,0xd7,0xc2,0xc5,0xcc,0xcb,2 n; F; ?7 X3 _. }' c
0xe6,0xe1,0xe8,0xef,0xfa,0xfd,0xf4,0xf3,//f
2 A2 s' @ [4 D5 d. I/ t}; |