kopia lustrzana https://github.com/rs1729/RS
ecc: RS(15,11)
me
rodzic
456108ea15
commit
4abdc6d4a5
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@ -104,8 +104,8 @@ static RS_t RS256 = { 255, 12, 24, 231, 0, 1, 1, {0}};
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static RS_t RS256ccsds = { 255, 16, 32, 223, 112, 11, 116, {0}};
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static RS_t BCH64 = { 63, 2, 12, 51, 1, 1, 1, {0}};
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static RS_t RS16_0 = { 15, 3, 6, 9, 0, 1, 1, {0}};
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//static RS_t RS16_1 = { 15, 3, 6, 9, 1, 1, 1, {0}};
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// static RS_t RS16_0 = { 15, 3, 6, 9, 0, 1, 1, {0}};
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static RS_t RS16ccsds = { 15, 2, 4, 11, 6, 1, 1, {0}};
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static GF_t GF;
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@ -813,15 +813,15 @@ int rs_init_BCH64() {
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return check_gen;
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}
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int rs_init_RS15() {
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int rs_init_RS15ccsds() {
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int i, check_gen;
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ui8_t Xalp[MAX_DEG+1];
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GF = GF16RS;
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check_gen = GF_genTab( GF, exp_a, log_a);
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RS = RS16_0; // N=15, t=3, b=0, p=1
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//RS = RS16_1; // N=15, t=3, b=1, p=1
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//RS = RS16_0; // N=15, t=3, b=0, p=1
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RS = RS16ccsds; // N=15, t=2, b=6, p=1
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for (i = 0; i <= MAX_DEG; i++) RS.g[i] = 0;
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for (i = 0; i <= MAX_DEG; i++) Xalp[i] = 0;
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@ -1,6 +1,6 @@
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/*
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GF(2^4) - RS(15,9)
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GF(2^4) - RS(15,11)
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(no bit-packing, i.e. 1 nibble <-> 1 byte)
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a)
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@ -9,10 +9,10 @@ a)
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gcc -c encode_rs_char.c
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gcc -c decode_rs_char.c
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gcc -DKA9Q ecc-rs_gf16.c init_rs_char.o encode_rs_char.o decode_rs_char.o -o ecc-rs15
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gcc -DKA9Q ecc-rs_gf16.c init_rs_char.o encode_rs_char.o decode_rs_char.o -o ecc-rs15ccsds
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b)
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gcc ecc-rs_gf16.c -o ecc-rs15
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gcc ecc-rs_gf16.c -o ecc-rs15ccsds
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*/
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@ -33,7 +33,7 @@ typedef unsigned int ui32_t;
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#define BFSIZE 512
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#define rs_N 15
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#define rs_R 6
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#define rs_R 4
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#define rs_K (rs_N-rs_R)
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ui8_t data[BFSIZE];
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@ -58,11 +58,11 @@ int main(int argc, char *argv[]) {
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*str2 = NULL;
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rs_init_RS15(); // 0x13: X^4 + X + 1
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rs_init_RS15ccsds(); // 0x13: X^4 + X + 1, t=2, b=6
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#ifdef KA9Q
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rs = init_rs_char( 4, 0x13, 0, 1, 6, 0); // RS16_0
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//rs = init_rs_char( 4, 0x13, 1, 1, 6, 0); // RS16_1
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//rs = init_rs_char( 4, 0x13, 0, 1, 6, 0); // RS16_0
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rs = init_rs_char( 4, 0x13, 6, 1, 4, 0); // RS16ccsds
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#endif
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if (argv[0] == NULL) return -1;
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@ -121,11 +121,17 @@ int main(int argc, char *argv[]) {
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for (i = 0; i < rs_N; i++) codeword[rs_N-1-i] = cw[i];
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#endif
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printf("(received)\n");
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printf("msg: ");
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for (i = rs_R; i < rs_N; i++) printf("%1X", cw[i]); // dbg: printf("%02X", cw[i]);
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printf("\n");
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printf("par: ");
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for (i = 0; i < rs_R; i++) printf("%1X", cw[i]); printf("\n");
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for (i = 0; i < rs_R; i++) printf("%1X", cw[i]);
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printf("\n");
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printf("msg+par:\n");
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for (i = 0; i < rs_N; i++) printf("%1X", cw[i]);
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printf("\n");
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printf("\n");
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@ -213,14 +219,14 @@ int main(int argc, char *argv[]) {
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/*
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RS(15,9):
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RS(15,11):
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codeword length 15
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message length 9
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parity length 6
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message length 11
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parity length 4
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./ecc-rs15 msg [par]
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msg: 9 nibbles
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par: 6 nibbles
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msg: 11 nibbles
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par: 4 nibbles
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ecc-rs15 input/output: nibbles
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cw[]: 1 byte / 1 nibble
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@ -228,33 +234,54 @@ cw[]: 1 byte / 1 nibble
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examples:
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$ ./ecc-rs15 000000001
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$ ./ecc-rs15ccsds 00000000001
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msg: 000000001
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msg: 00000000001
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cw
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par: 342FA1
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par: 8281
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cw-enc:
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342FA1000000001
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828100000000001
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codeword
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message: 100000000
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parity : 1af243
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message: 10000000000
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parity : 1828
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codeword:
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1000000001af243
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100000000001828
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$ ./ecc-rs15 000000001 342FA1
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$ ./ecc-rs15ccsds 00000000001 8281
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msg: 000000001
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par: 342FA1
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(received)
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msg: 00000000001
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par: 8281
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msg+par:
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828100000000001
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cw
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errs: 0
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342FA1000000001
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828100000000001
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codeword
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errors: 0
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1000000001af243
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100000000001828
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$ ./ecc-rs15ccsds 00000000001 8283
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(received)
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msg: 00000000001
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par: 8283
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msg+par:
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828300000000001
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cw
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errs: 1
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pos: 3
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828100000000001
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codeword
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errors: 1
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pos: 11
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100000000001828
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*/
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