mirror of https://github.com/wb2osz/direwolf.git
Put original program back for reference. Added fixed codes.
This commit is contained in:
David E. Tiller
parent
be0f9c4d2f
commit
475f951457
13
src/bch.c
13
src/bch.c
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@ -514,12 +514,13 @@ void dump_bch(bch_t *bch) {
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int main()
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{
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int test[][8] = {
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{ 0xb2, 0x17, 0xa2, 0xb9, 0x53, 0xdd, 0xc5, 0x52 }, /* perfect random test */
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/* 0 errors */ { 0xb2, 0x17, 0xa2, 0xb9, 0x53, 0xdd, 0xc5, 0x52 }, /* perfect random test */
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{ 0xf0, 0x5a, 0x6a, 0x6a, 0x01, 0x63, 0x33, 0xd0 }, /* g001-cut-lenthened_457.938M.wav */
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{ 0xf0, 0x81, 0x52, 0x6b, 0x71, 0xa5, 0x63, 0x08 }, /* 1st in eotd_received_data */
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/* 3 errors */ { 0xf0, 0x85, 0x50, 0x6a, 0x01, 0xe5, 0x6e, 0x84 }, /* 2nd in eotd_received_data */
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/* fixed */ { 0xf0, 0x85, 0x50, 0x6a, 0x01, 0xe5, 0x06, 0x84 }, /* 2nd, but with the bits fixed */
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{ 0xf0, 0x85, 0x59, 0x5a, 0x01, 0xe5, 0x6e, 0x84 }, /* 3rd - 3 bad bits */
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/* 3 errors */ { 0xf0, 0x85, 0x50, 0x6a, 0x01, 0xe5, 0x6e, 0x84 }, /* 2nd in eotd_received_data - 3 bad bits */
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/* 0 errors */ { 0xf0, 0x85, 0x50, 0x6a, 0x01, 0xe5, 0x06, 0x84 }, /* 2nd, but with the bits fixed */
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/* 3 errors */ { 0xf0, 0x85, 0x59, 0x5a, 0x01, 0xe5, 0x6e, 0x84 }, /* 3rd - 3 bad bits */
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/* 0 errors */ { 0xb0, 0x85, 0x59, 0x5a, 0x11, 0xe5, 0x6f, 0x84 }, /* 3rd fixed */
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{ 0xf1, 0x34, 0x50, 0x1a, 0x01, 0xe5, 0x66, 0xfe }, /* 4th */
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{ 0xf0, 0xeb, 0x10, 0xea, 0x01, 0x6e, 0x54, 0x1c }, /* 5th */
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{ 0xf0, 0xea, 0x5c, 0xea, 0x01, 0x6e, 0x55, 0x0e }, /* 6th */
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@ -527,8 +528,8 @@ int main()
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{ 0xf0, 0x42, 0x50, 0x5b, 0xcf, 0xd5, 0x64, 0xe4 }, /* Sun Mar 20 12:58:43 2022 */
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{ 0xf0, 0x8c, 0x10, 0xaa, 0x01, 0x73, 0x7b, 0x1a }, /* Sun Mar 20 13:35:48 2022 */
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{ 0xf0, 0x8c, 0x10, 0xb1, 0xc0, 0xe0, 0x90, 0x64 }, /* Sun Mar 20 13:37:05 2022 */
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{ 0xf0, 0x8c, 0x10, 0x6a, 0x01, 0x64, 0x7a, 0xe8 }, /* Sun Mar 20 13:37:48 2022 - 3 bad bits */
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{ 0x50, 0x8c, 0x12, 0x6a, 0x01, 0x64, 0x7a, 0xe8 }, /* above, with bits fixed */
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/* 3 errors */ { 0xf0, 0x8c, 0x10, 0x6a, 0x01, 0x64, 0x7a, 0xe8 }, /* Sun Mar 20 13:37:48 2022 - 3 bad bits */
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/* 0 errors */ { 0x50, 0x8c, 0x12, 0x6a, 0x01, 0x64, 0x7a, 0xe8 }, /* Sun Mar 20 13:37:48 2022 with bits fixed */
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};
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int bits[63];
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92
src/bch3.c
92
src/bch3.c
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@ -72,7 +72,6 @@
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#include <math.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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int m, n, length, k, t, d;
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int p[21];
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@ -81,71 +80,6 @@ int recd[1048576], data[1048576], bb[548576];
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int seed;
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int numerr, errpos[1024], decerror = 0;
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int real_data[][45] = {
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{ 1,1,1,1,0,0,0,0,
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0,1,0,1,1,0,1,0,
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0,1,1,0,1,0,1,0,
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0,1,1,0,1,0,1,0,
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0,0,0,0,0,0,0,1,
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0,1,1,0,0},
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// 0=f0 1=81 2=52 3=6b 4=71 5=a5 6=63 7=08
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{ 1,1,1,1,0,0,0,0,
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1,0,0,0,0,0,0,1,
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0,1,0,1,0,0,1,0,
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0,1,1,0,1,0,1,1,
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0,1,1,1,0,0,0,1,
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1,0,1,0,0},
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// 0=f0 1=85 2=50 3=6a 4=01 5=e5 6=6e 7=84
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{ 1,1,1,1,0,0,0,0,
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1,0,0,0,0,1,0,1,
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0,1,0,1,0,0,0,0,
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0,1,1,0,1,0,1,0,
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0,0,0,0,0,0,0,1,
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1,1,1,0,0},
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// 0=f0 1=85 2=59 3=5a 4=01 5=e5 6=6e 7=84
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{ 1,1,1,1,0,0,0,0,
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1,0,0,0,0,1,0,1,
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0,1,0,1,1,0,1,0,
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0,0,0,0,0,0,0,1,
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1,1,1,0,0},
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// 0=f1 1=34 2=50 3=1a 4=01 5=e5 6=66 7=fe
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{ 1,1,1,1,0,0,0,1,
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0,0,1,1,0,1,0,0,
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0,1,0,1,0,0,0,0,
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0,0,0,1,1,0,1,0,
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0,0,0,0,0,0,0,1,
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1,1,1,0,0},
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// 0=f0 1=eb 2=10 3=ea 4=01 5=6e 6=54 7=1c
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{ 1,1,1,1,0,0,0,0,
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1,1,1,0,1,0,1,1,
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0,0,0,1,0,0,0,0,
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1,1,1,0,1,0,1,0,
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0,0,0,0,0,0,0,1,
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0,1,1,0,1},
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// 0=f0 1=ea 2=5c 3=ea 4=01 5=6e 6=55 7=0e
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{ 1,1,1,1,0,0,0,0,
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1,1,1,0,1,0,1,0,
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0,1,0,1,1,1,0,0,
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1,1,1,0,1,0,1,0,
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0,0,0,0,0,0,0,1,
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0,1,1,0,1},
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};
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int expected[][18] = {
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{ 0,1,1, 0,0,1,1, 0,0,1,1, 1,1,0,1, 0,0,0 },
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{ 1,0,1, 0,1,1,0, 0,0,1,1, 0,0,0,0, 1,0,0 },
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//orig { 1,0,1, 0,1,1,0, 1,1,1,0, 1,0,0,0, 0,1,0 },
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{ 1,0,1, 0,0,0,0, 0,1,1,0, 1,0,0,0, 0,1,0 }, // CORRECTED
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{ 1,0,1, 0,1,1,0, 1,1,1,0, 1,0,0,0, 0,1,0 },
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{ 1,0,1, 0,1,1,0, 0,1,1,0, 1,1,1,1, 1,1,1 },
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{ 1,1,0, 0,1,0,1, 0,1,0,0, 0,0,0,1, 1,1,0 },
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{ 1,1,0, 0,1,0,1, 0,1,0,1, 0,0,0,0, 1,1,1 },
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};
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void
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read_p()
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@ -581,16 +515,12 @@ int main()
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generate_gf(); /* Construct the Galois Field GF(2**m) */
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gen_poly(); /* Compute the generator polynomial of BCH code */
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#ifdef TEST
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for (int count = 0; count < sizeof(real_data) / sizeof(*real_data); count++) {
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memcpy(data, real_data[count], sizeof(*real_data));
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#else
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/* Randomly generate DATA */
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seed = 131073;
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srandom(seed);
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for (i = 0; i < k; i++)
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data[i] = ( random() & 65536 ) >> 16;
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#endif
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encode_bch(); /* encode data */
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/*
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@ -623,9 +553,8 @@ for (int count = 0; count < sizeof(real_data) / sizeof(*real_data); count++) {
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printf("r(x) = ");
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for (i = 0; i < length; i++) {
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printf("%1d", recd[i]);
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if (i == length - k - 1) printf(" ");
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//if (i && ((i % 50) == 0))
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//printf("\n");
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if (i && ((i % 50) == 0))
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printf("\n");
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}
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printf("\n");
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@ -649,18 +578,6 @@ if (i == length - k - 1) printf(" ");
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}
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printf("\n");
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int flag = 0;
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printf("n=%d, k=%d, length=%d\n", n, k, length);
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#ifdef TEST
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for (int jj = 0; jj < n - k; jj++) {
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if (expected[count][jj] != recd[jj]) {
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printf("bit %d: expected %d calc: %d\n", jj, expected[count][jj], recd[jj]);
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flag++;
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}
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}
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printf("%d ERRORS.\n", flag);
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#endif
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/*
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* DECODING ERRORS? we compare only the data portion
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*/
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@ -671,7 +588,4 @@ printf("n=%d, k=%d, length=%d\n", n, k, length);
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printf("There were %d decoding errors in message positions\n", decerror);
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else
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printf("Succesful decoding\n");
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#ifdef TEST
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}
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#endif
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}
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