kopia lustrzana https://github.com/F5OEO/ft8_lib
Updated tables and code
Karlis Goba
rodzic
8f004f11c4
commit
a29e1f0221
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@ -95,15 +95,15 @@ const uint8_t G[M][K_BYTES] = {
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// Column order (permutation) in which the bits in codeword are stored
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const uint8_t colorder[N] = {
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0, 1, 2, 3, 30, 4, 5, 6, 7, 8, 9, 10, 11, 32, 12, 40, 13, 14, 15, 16,
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17, 18, 37, 45, 29, 19, 20, 21, 41, 22, 42, 31, 33, 34, 44, 35, 47, 51, 50, 43,
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36, 52, 63, 46, 25, 55, 27, 24, 23, 53, 39, 49, 59, 38, 48, 61, 60, 57, 28, 62,
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56, 58, 65, 66, 26, 70, 64, 69, 68, 67, 74, 71, 54, 76, 72, 75, 78, 77, 80, 79,
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73, 83, 84, 81, 82, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99,
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100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,
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120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,
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140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,
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160,161,162,163,164,165,166,167,168,169,170,171,172,173
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0, 1, 2, 3, 28, 4, 5, 6, 7, 8, 9, 10, 11, 34, 12, 32, 13, 14, 15, 16,
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17, 18, 36, 29, 43, 19, 20, 42, 21, 40, 30, 37, 22, 47, 61, 45, 44, 23, 41, 39,
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49, 24, 46, 50, 48, 26, 31, 33, 51, 38, 52, 59, 55, 66, 57, 27, 60, 35, 54, 58,
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25, 56, 62, 64, 67, 69, 63, 68, 70, 72, 65, 73, 75, 74, 71, 77, 78, 76, 79, 80,
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53, 81, 83, 82, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99,
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100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,
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120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,
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140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,
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160,161,162,163,164,165,166,167,168,169,170,171,172,173
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};
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// Costas 7x7 tone pattern
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@ -234,7 +234,7 @@ void genft8(const uint8_t *payload, uint8_t i3, uint8_t *itone) {
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a91[9] |= (uint8_t)(checksum >> 11);
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a91[10] = (uint8_t)(checksum >> 3);
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// a87 contains 72 bits of payload + 3 bits of i3 + 12 bits of CRC
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// a87 contains 77 bits of payload + 14 bits of CRC
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uint8_t codeword[22];
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encode174(a91, codeword);
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107
pack_77.cpp
107
pack_77.cpp
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@ -3,6 +3,7 @@
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#include "text.h"
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// TODO: This is wasteful, should figure out something more elegant
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const char *A0 = " 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ+-./?";
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const char *A1 = " 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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const char *A2 = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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@ -24,13 +25,10 @@ int32_t pack28(const char *callsign) {
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constexpr int32_t NTOKENS = 2063592L;
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constexpr int32_t MAX22 = 4194304L;
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int length = strlen(callsign); // We will need it later
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if (length > 13) return -1;
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// Check for special tokens first
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if (equals(callsign, "DE")) return 0;
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if (equals(callsign, "QRZ")) return 1;
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if (equals(callsign, "CQ")) return 2;
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if (starts_with(callsign, "DE ")) return 0;
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if (starts_with(callsign, "QRZ ")) return 1;
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if (starts_with(callsign, "CQ ")) return 2;
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if (starts_with(callsign, "CQ_")) {
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int nnum = 0, nlet = 0;
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@ -46,6 +44,11 @@ int32_t pack28(const char *callsign) {
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char c6[6] = {' ', ' ', ' ', ' ', ' ', ' '};
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int length = 0; // strlen(callsign); // We will need it later
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while (callsign[length] != ' ' && callsign[length] != 0) {
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length++;
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}
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// Work-around for Swaziland prefix:
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if (starts_with(callsign, "3DA0") && length <= 7) {
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memcpy(c6, "3D0", 3);
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@ -83,6 +86,8 @@ int32_t pack28(const char *callsign) {
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//char c13[13];
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//if (length > 13) return -1;
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// Treat this as a nonstandard callsign: compute its 22-bit hash
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// call save_hash_call(c13,n10,n12,n22) !Save callsign in hash table
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// n28=NTOKENS + n22
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@ -113,27 +118,82 @@ bool chkcall(const char *call, char *bc) {
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}
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uint16_t packgrid(const char *grid4) {
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constexpr uint16_t MAXGRID4 = 32400;
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if (grid4 == 0) {
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// Two callsigns only, no report/grid
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return MAXGRID4 + 1;
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}
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// Take care of special cases
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if (equals(grid4, "RRR")) return MAXGRID4 + 2;
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if (equals(grid4, "RR73")) return MAXGRID4 + 3;
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if (equals(grid4, "73")) return MAXGRID4 + 4;
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// Check for standard 4 letter grid
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if (in_range(grid4[0], 'A', 'R') &&
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in_range(grid4[1], 'A', 'R') &&
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is_digit(grid4[2]) && is_digit(grid4[3]))
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{
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//if (w(3).eq.'R ') ir=1
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uint16_t igrid4 = (grid4[3] - '0');
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igrid4 = igrid4 * 10 + (grid4[2] - '0');
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igrid4 = igrid4 * 10 + (grid4[1] - 'A');
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igrid4 = igrid4 * 18 + (grid4[0] - 'A');
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return igrid4;
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}
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// Parse report: +dd / -dd / R+dd / R-dd
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// TODO: check the range of dd
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if (grid4[0] == 'R') {
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int dd = dd_to_int(grid4 + 1, 3);
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uint16_t irpt = 35 + dd;
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return (MAXGRID4 + irpt) | 0x8000; // ir = 1
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}
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else {
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int dd = dd_to_int(grid4, 3);
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uint16_t irpt = 35 + dd;
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return (MAXGRID4 + irpt); // ir = 0
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}
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return MAXGRID4 + 1;
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}
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// Pack Type 1 (Standard 77-bit message) and Type 2 (ditto, with a "/P" call)
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void pack77_1(const char *msg, uint8_t i3, uint8_t *b77) {
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int pack77_1(const char *msg, uint8_t *b77) {
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// Locate the first delimiter
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const char *s1 = strchr(msg, ' ');
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if (s1 == 0) return -1;
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const char *call1 = msg; // 1st call
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const char *call2 = s1 + 1; // 2nd call
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int32_t n28a = pack28(call1);
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int32_t n28b = pack28(call2);
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uint16_t igrid4;
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// Locate the second delimiter
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const char *s2 = strchr(s1 + 1, ' ');
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if (s2 != 0) {
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igrid4 = packgrid(s2 + 1);
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}
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else {
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// Two callsigns, no grid/report
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igrid4 = packgrid(0);
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}
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uint8_t i3 = 1;
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// if(index(w(1),'/P').ge.4 .or. index(w(2),'/P').ge.4) i3=2 !Type 2, with "/P"
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// if(index(w(1),'/P').ge.4 .or. index(w(1),'/R').ge.4) ipa=1
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// if(index(w(2),'/P').ge.4 .or. index(w(2),'/R').ge.4) ipb=1
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int32_t n28a, n28b;
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uint16_t igrid4;
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const char *call1, *call2;
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n28a = pack28(call1);
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n28b = pack28(call2);
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// Add ipa and ipb bits to the right
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// Shift in ipa and ipb bits into n28a and n28b
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n28a <<= 1; // ipa = 0
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n28b <<= 1; // ipb = 0
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// Add igrid4 bit to the left
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//igrid4 |= 0x8000; // ir = 1
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// write(c77,1000) n28a,ipa,n28b,ipb,ir,igrid4,i3
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// 1000 format(2(b28.28,b1),b1,b15.15,b3.3)
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// (28 + 1) + (28 + 1) + (1 + 15) + 3
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@ -148,6 +208,8 @@ void pack77_1(const char *msg, uint8_t i3, uint8_t *b77) {
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b77[7] = (uint8_t)(n28a << 6) | (uint8_t)(igrid4 >> 10);
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b77[8] = (igrid4 >> 2);
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b77[9] = (uint8_t)(igrid4 << 6) | (uint8_t)(i3 << 3);
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return 0;
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}
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@ -182,10 +244,9 @@ void packtext77(const char *c13, uint8_t *b71) {
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int pack77(const char *msg, uint8_t *c77) {
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// Check Type 1 (Standard 77-bit message) or Type 2, with optional "/P"
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if (starts_with(msg, "CQ ")) {
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pack77_1(nwords,w,i3,n3,c77);
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return;
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}
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//if (starts_with(msg, "CQ ")) {
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return pack77_1(msg, c77);
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//}
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// Check 0.5 (telemetry)
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// i3=0 n3=5 write(c77,1006) ntel,n3,i3 1006 format(b23.23,2b24.24,2b3.3)
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