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Restoring jammer and RDS functionalities, please wait...

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Started work on frequency manager and numbers station simulator
This commit is contained in:
furrtek 2016-12-05 12:56:41 +01:00
parent ef0feae62b
commit d18b6d135d
43 changed files with 1083 additions and 734 deletions
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175
firmware/application/rds.cpp Normal file
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/*
* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
* Copyright (C) 2016 Furrtek
*
* This file is part of PortaPack.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include "rds.hpp"
#include "portapack_shared_memory.hpp"
namespace rds {
uint32_t makeblock(uint32_t blockdata, uint16_t offset) {
uint16_t CRC = 0;
uint8_t doinv;
for (uint8_t i = 0; i < 16; i++) {
doinv = (((blockdata << i) & 0x8000) >> 15) ^ (CRC >> 9);
if (doinv) CRC ^= 0b0011011100;
CRC = ((CRC << 1) | doinv) & 0x3FF;
}
return (blockdata << 10) | (CRC ^ offset);
}
// Todo:
// Make PI
// TA/TP flags
// Group selection
// Boolean to binary
uint8_t b2b(const bool in) {
if (in)
return 1;
else
return 0;
}
void make_0B_group(uint32_t group[], const uint16_t PI_code, const bool TP, const uint8_t PTY, const bool TA,
const bool MS, const bool DI, const uint8_t C, const char * chars) {
group[0] = PI_code;
group[1] = (0x0 << 12) | (1 << 11) | (b2b(TP) << 10) | (PTY << 5) | (b2b(TA) << 4) | (b2b(MS) << 3) | (b2b(DI) << 2) | (C & 3);
group[2] = PI_code;
group[3] = (chars[0] << 8) | chars[1];
}
void make_2A_group(uint32_t group[], const uint16_t PI_code, const bool TP, const uint8_t PTY, const bool AB,
const uint8_t segment, const char * chars) {
group[0] = PI_code;
group[1] = (0x0 << 12) | (1 << 11) | (b2b(TP) << 10) | (PTY << 5) | (b2b(AB) << 4) | (segment & 15);
group[2] = (chars[0] << 8) | chars[1];
group[3] = (chars[2] << 8) | chars[3];
}
uint16_t gen_PSN(const char * psname, const uint8_t pty) {
uint8_t c;
uint32_t group[4][4] = { 0 };
// 4 groups with 2 PSN characters in each
make_0B_group(&group[0][0], 0xF849, true, pty, false, true, false, 0, &psname[0]);
make_0B_group(&group[1][0], 0xF849, true, pty, false, true, false, 1, &psname[2]);
make_0B_group(&group[2][0], 0xF849, true, pty, false, true, false, 2, &psname[4]);
make_0B_group(&group[3][0], 0xF849, true, pty, false, true, false, 3, &psname[6]);
/*uint32_t group[4][4] = {
{
0b1111100001001001, //PI
0b0000110011101000, //Address
0b1111100001001001, //PI
0b0000000000000000 //Replaced
},
{
0b1111100001001001, //PI
0b0000110011101001, //Address
0b1111100001001001, //PI
0b0000000000000000 //Replaced
},
{
0b1111100001001001, //PI
0b0000110011101010, //Address
0b1111100001001001, //PI
0b0000000000000000 //Replaced
},
{
0b1111100001001001, //PI
0b0000110011101011, //Address
0b1111100001001001, //PI
0b0000000000000000 //Replaced
},
};
//Insert PSN data in groups
group[0][3] = (psname[0] << 8) | psname[1];
group[1][3] = (psname[2] << 8) | psname[3];
group[2][3] = (psname[4] << 8) | psname[5];
group[3][3] = (psname[6] << 8) | psname[7];
*/
// Generate checkbits for all blocks
for (c = 0; c < 4; c++) {
group[c][0] = makeblock(group[c][0], RDS_OFFSET_A);
group[c][1] = makeblock(group[c][1], RDS_OFFSET_B);
group[c][2] = makeblock(group[c][2], RDS_OFFSET_Cp); // C' !
group[c][3] = makeblock(group[c][3], RDS_OFFSET_D);
}
// Todo
//for (c = 0; c < 16; c++)
// shared_memory.radio_data[c] = group[c >> 2][c & 3];
return 4 * 4 * 26;
}
uint16_t gen_RadioText(const char * radiotext, const uint8_t pty) {
size_t c, i;
uint32_t * group;
char radiotext_buffer[65] = { 0 };
uint8_t rtlen, groups;
strcpy(radiotext_buffer, radiotext);
rtlen = strlen(radiotext_buffer);
radiotext_buffer[rtlen] = 0x0D;
// Pad to multiple of 4
while (rtlen & 3)
radiotext_buffer[rtlen++] = ' ';
groups = rtlen >> 2; // 4 characters per group
group = (uint32_t*)chHeapAlloc(0x0, 4 * groups * sizeof(uint32_t));
for (c = 0; c < groups; c++)
make_2A_group(&group[c << 2], 0xF849, true, pty, false, c, &radiotext_buffer[c * 4]);
// Generate checkbits
for (c = 0; c < groups; c++) {
i = c * 4;
group[i + 0] = makeblock(group[i + 0], RDS_OFFSET_A);
group[i + 1] = makeblock(group[i + 1], RDS_OFFSET_B);
group[i + 2] = makeblock(group[i + 2], RDS_OFFSET_C);
group[i + 3] = makeblock(group[i + 3], RDS_OFFSET_D);
}
uint32_t * tx_data_u32 = (uint32_t*)shared_memory.tx_data;
for (c = 0; c < (groups * 4); c++)
tx_data_u32[c] = group[c];
return groups * 4 * 26;
}
} /* namespace rds */