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Update 48k version
In to NXDN possible problem on sinc filter anc isinc filter, think they must be recalculated but do not know how to do it. On D-STAR, DMR, C4FM and P25 it work.
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LucaMarche IZ1MLT
GitHub
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75 changed files with 7038 additions and 2324 deletions
95
YSFTX.cpp
95
YSFTX.cpp
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@ -1,5 +1,6 @@
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/*
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* Copyright (C) 2009-2016 by Jonathan Naylor G4KLX
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* Copyright (C) 2009-2017 by Jonathan Naylor G4KLX
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* Copyright (C) 2017 by Andy Uribe CA6JAU
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@ -16,42 +17,53 @@
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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// #define WANT_DEBUG
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#include "Config.h"
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#include "Globals.h"
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#include "YSFTX.h"
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#include "YSFDefines.h"
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// Generated using rcosdesign(0.2, 4, 10, 'sqrt') in MATLAB
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static q15_t YSF_C4FSK_FILTER[] = {486, 39, -480, -1022, -1526, -1928, -2164, -2178, -1927, -1384, -548, 561, 1898, 3399, 4980, 6546, 7999, 9246, 10202, 10803, 11008, 10803, 10202, 9246,
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7999, 6546, 4980, 3399, 1898, 561, -548, -1384, -1927, -2178, -2164, -1928, -1526, -1022, -480, 39, 486, 0};
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const uint16_t YSF_C4FSK_FILTER_LEN = 42U;
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// Generated using rcosdesign(0.2, 8, 10, 'sqrt') in MATLAB
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static q15_t RRC_0_2_FILTER[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 850, 592, 219, -234, -720, -1179,
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-1548, -1769, -1795, -1597, -1172, -544, 237, 1092, 1927, 2637,
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3120, 3286, 3073, 2454, 1447, 116, -1431, -3043, -4544, -5739,
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-6442, -6483, -5735, -4121, -1633, 1669, 5651, 10118, 14822,
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19484, 23810, 27520, 30367, 32156, 32767, 32156, 30367, 27520,
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23810, 19484, 14822, 10118, 5651, 1669, -1633, -4121, -5735,
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-6483, -6442, -5739, -4544, -3043, -1431, 116, 1447, 2454,
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3073, 3286, 3120, 2637, 1927, 1092, 237, -544, -1172, -1597,
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-1795, -1769, -1548, -1179, -720, -234, 219, 592, 850}; // numTaps = 90, L = 10
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const uint16_t RRC_0_2_FILTER_PHASE_LEN = 9U; // phaseLength = numTaps/L
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const q15_t YSF_LEVELA[] = { 499, 499, 499, 499, 499, 499, 499, 499, 499, 499};
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const q15_t YSF_LEVELB[] = { 166, 166, 166, 166, 166, 166, 166, 166, 166, 166};
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const q15_t YSF_LEVELC[] = {-166, -166, -166, -166, -166, -166, -166, -166, -166, -166};
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const q15_t YSF_LEVELD[] = {-499, -499, -499, -499, -499, -499, -499, -499, -499, -499};
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const q15_t YSF_LEVELA_HI = 1893;
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const q15_t YSF_LEVELB_HI = 631;
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const q15_t YSF_LEVELC_HI = -631;
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const q15_t YSF_LEVELD_HI = -1893;
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const q15_t YSF_LEVELA_LO = 948;
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const q15_t YSF_LEVELB_LO = 316;
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const q15_t YSF_LEVELC_LO = -316;
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const q15_t YSF_LEVELD_LO = -948;
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const uint8_t YSF_START_SYNC = 0x77U;
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const uint8_t YSF_END_SYNC = 0xFFU;
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CYSFTX::CYSFTX() :
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m_buffer(1500U),
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m_buffer(4000U),
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m_modFilter(),
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m_modState(),
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m_poBuffer(),
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m_poLen(0U),
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m_poPtr(0U),
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m_txDelay(240U), // 200ms
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m_count(0U)
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m_loDev(false)
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{
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::memset(m_modState, 0x00U, 90U * sizeof(q15_t));
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::memset(m_modState, 0x00U, 16U * sizeof(q15_t));
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m_modFilter.numTaps = YSF_C4FSK_FILTER_LEN;
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m_modFilter.pState = m_modState;
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m_modFilter.pCoeffs = YSF_C4FSK_FILTER;
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m_modFilter.L = YSF_RADIO_SYMBOL_LENGTH;
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m_modFilter.phaseLength = RRC_0_2_FILTER_PHASE_LEN;
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m_modFilter.pCoeffs = RRC_0_2_FILTER;
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m_modFilter.pState = m_modState;
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}
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void CYSFTX::process()
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@ -61,8 +73,6 @@ void CYSFTX::process()
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if (m_poLen == 0U) {
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if (!m_tx) {
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m_count = 0U;
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for (uint16_t i = 0U; i < m_txDelay; i++)
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m_poBuffer[m_poLen++] = YSF_START_SYNC;
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} else {
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@ -110,59 +120,48 @@ uint8_t CYSFTX::writeData(const uint8_t* data, uint8_t length)
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void CYSFTX::writeByte(uint8_t c)
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{
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q15_t inBuffer[YSF_RADIO_SYMBOL_LENGTH * 4U + 1U];
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q15_t outBuffer[YSF_RADIO_SYMBOL_LENGTH * 4U + 1U];
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q15_t inBuffer[4U];
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q15_t outBuffer[YSF_RADIO_SYMBOL_LENGTH * 4U];
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const uint8_t MASK = 0xC0U;
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q15_t* p = inBuffer;
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for (uint8_t i = 0U; i < 4U; i++, c <<= 2, p += YSF_RADIO_SYMBOL_LENGTH) {
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for (uint8_t i = 0U; i < 4U; i++, c <<= 2) {
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switch (c & MASK) {
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case 0xC0U:
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::memcpy(p, YSF_LEVELA, YSF_RADIO_SYMBOL_LENGTH * sizeof(q15_t));
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inBuffer[i] = m_loDev ? YSF_LEVELA_LO : YSF_LEVELA_HI;
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break;
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case 0x80U:
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::memcpy(p, YSF_LEVELB, YSF_RADIO_SYMBOL_LENGTH * sizeof(q15_t));
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inBuffer[i] = m_loDev ? YSF_LEVELB_LO : YSF_LEVELB_HI;
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break;
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case 0x00U:
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::memcpy(p, YSF_LEVELC, YSF_RADIO_SYMBOL_LENGTH * sizeof(q15_t));
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inBuffer[i] = m_loDev ? YSF_LEVELC_LO : YSF_LEVELC_HI;
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break;
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default:
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::memcpy(p, YSF_LEVELD, YSF_RADIO_SYMBOL_LENGTH * sizeof(q15_t));
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inBuffer[i] = m_loDev ? YSF_LEVELD_LO : YSF_LEVELD_HI;
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break;
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}
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}
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uint16_t blockSize = YSF_RADIO_SYMBOL_LENGTH * 4U;
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::arm_fir_interpolate_q15(&m_modFilter, inBuffer, outBuffer, 4U);
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// Handle the case of the oscillator not being accurate enough
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if (m_sampleCount > 0U) {
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m_count += YSF_RADIO_SYMBOL_LENGTH * 4U;
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if (m_count >= m_sampleCount) {
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if (m_sampleInsert) {
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inBuffer[YSF_RADIO_SYMBOL_LENGTH * 4U] = inBuffer[YSF_RADIO_SYMBOL_LENGTH * 4U - 1U];
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blockSize++;
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} else {
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blockSize--;
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}
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m_count -= m_sampleCount;
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}
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}
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::arm_fir_fast_q15(&m_modFilter, inBuffer, outBuffer, blockSize);
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io.write(STATE_YSF, outBuffer, blockSize);
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io.write(STATE_YSF, outBuffer, YSF_RADIO_SYMBOL_LENGTH * 4U);
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}
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void CYSFTX::setTXDelay(uint8_t delay)
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{
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m_txDelay = 600U + uint16_t(delay) * 12U; // 500ms + tx delay
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if (m_txDelay > 1200U)
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m_txDelay = 1200U;
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}
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uint16_t CYSFTX::getSpace() const
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uint8_t CYSFTX::getSpace() const
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{
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return m_buffer.getSpace() / YSF_FRAME_LENGTH_BYTES;
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}
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void CYSFTX::setLoDev(bool on)
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{
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m_loDev = on;
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}
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