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MMDVM_HS
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Adapting original duplex DMR code to MMDVM_HS

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pull/14/head
Andy CA6JAU 9 years ago
parent ba44cf9f66
commit e86e1bfdd2
17 changed files with 219 additions and 458 deletions
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5
ADF7021.cpp
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@ -425,6 +425,7 @@ void CIO::ifConf(MMDVM_STATE modemState, bool reset)
void CIO::interrupt()
{
uint8_t bit = 0;
uint8_t control = MARK_NONE;
if (!m_started)
return;
@ -449,7 +450,7 @@ void CIO::interrupt()
// we set the TX bit at TXD low, sampling of ADF7021 happens at rising clock
if (m_tx && clk == 0) {
m_txBuffer.get(bit);
m_txBuffer.get(bit, control);
even = !even;
// use this for tracking issues
@ -498,7 +499,7 @@ void CIO::interrupt()
else
bit = 0;
m_rxBuffer.put(bit);
m_rxBuffer.put(bit, control);
}
if (torx_request == true && even == false && m_tx && clk == 0) {

14
BitRB.cpp
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@ -24,12 +24,14 @@ Boston, MA 02110-1301, USA.
CBitRB::CBitRB(uint16_t length) :
m_length(length),
m_bits(NULL),
m_control(NULL),
m_head(0U),
m_tail(0U),
m_full(false),
m_overflow(false)
{
m_bits = new uint8_t[length];
m_bits = new uint8_t[length];
m_control = new uint8_t[length];
}
uint16_t CBitRB::getSpace() const
@ -59,14 +61,15 @@ uint16_t CBitRB::getData() const
return m_length - m_tail + m_head;
}
bool CBitRB::put(uint8_t bit)
bool CBitRB::put(uint8_t bit, uint8_t control)
{
if (m_full) {
m_overflow = true;
return false;
}
m_bits[m_head] = bit;
m_bits[m_head] = bit;
m_control[m_head] = control;
m_head++;
if (m_head >= m_length)
@ -78,12 +81,13 @@ bool CBitRB::put(uint8_t bit)
return true;
}
bool CBitRB::get(uint8_t& bit)
bool CBitRB::get(uint8_t& bit, uint8_t& control)
{
if (m_head == m_tail && !m_full)
return false;
bit = m_bits[m_tail];
bit = m_bits[m_tail];
control = m_control[m_tail];
m_full = false;

5
BitRB.h
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@ -37,15 +37,16 @@ public:
uint16_t getData() const;
bool put(uint8_t bit);
bool put(uint8_t bit, uint8_t control);
bool get(uint8_t& bit);
bool get(uint8_t& bit, uint8_t& control);
bool hasOverflowed();
private:
uint16_t m_length;
volatile uint8_t* m_bits;
volatile uint8_t* m_control;
volatile uint16_t m_head;
volatile uint16_t m_tail;
volatile bool m_full;

171
DMRIdleRX.cpp
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@ -1,5 +1,6 @@
/*
* Copyright (C) 2009-2017 by Jonathan Naylor G4KLX
* Copyright (C) 2017 by Andy Uribe CA6JAU
*
* 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
@ -16,39 +17,29 @@
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#if defined(DUPLEX)
#define WANT_DEBUG
#include "Config.h"
#if defined(DUPLEX)
#include "Globals.h"
#include "DMRIdleRX.h"
#include "DMRSlotType.h"
#include "Utils.h"
const q15_t SCALING_FACTOR = 19505; // Q15(0.60)
const uint8_t MAX_SYNC_SYMBOLS_ERRS = 2U;
const uint8_t MAX_SYNC_BYTES_ERRS = 3U;
const uint8_t BIT_MASK_TABLE[] = {0x80U, 0x40U, 0x20U, 0x10U, 0x08U, 0x04U, 0x02U, 0x01U};
#define WRITE_BIT1(p,i,b) p[(i)>>3] = (b) ? (p[(i)>>3] | BIT_MASK_TABLE[(i)&7]) : (p[(i)>>3] & ~BIT_MASK_TABLE[(i)&7])
const uint16_t NOENDPTR = 9999U;
const uint8_t CONTROL_IDLE = 0x80U;
const uint8_t CONTROL_DATA = 0x40U;
CDMRIdleRX::CDMRIdleRX() :
m_bitBuffer(),
m_buffer(),
m_bitPtr(0U),
m_dataPtr(0U),
m_endPtr(NOENDPTR),
m_maxCorr(0),
m_centre(0),
m_threshold(0),
m_colorCode(0U)
{
}
@ -56,102 +47,33 @@ m_colorCode(0U)
void CDMRIdleRX::reset()
{
m_dataPtr = 0U;
m_bitPtr = 0U;
m_maxCorr = 0;
m_threshold = 0;
m_centre = 0;
m_endPtr = NOENDPTR;
}
void CDMRIdleRX::samples(const q15_t* samples, uint8_t length)
{
for (uint8_t i = 0U; i < length; i++)
processSample(samples[i]);
}
void CDMRIdleRX::processSample(q15_t sample)
void CDMRIdleRX::databit(bool bit)
{
m_bitBuffer[m_bitPtr] <<= 1;
if (sample < 0)
m_bitBuffer[m_bitPtr] |= 0x01U;
m_buffer[m_dataPtr] = sample;
if (countBits32((m_bitBuffer[m_bitPtr] & DMR_SYNC_SYMBOLS_MASK) ^ DMR_MS_DATA_SYNC_SYMBOLS) <= MAX_SYNC_SYMBOLS_ERRS) {
uint16_t ptr = m_dataPtr + DMR_FRAME_LENGTH_SAMPLES - DMR_SYNC_LENGTH_SAMPLES + DMR_RADIO_SYMBOL_LENGTH;
if (ptr >= DMR_FRAME_LENGTH_SAMPLES)
ptr -= DMR_FRAME_LENGTH_SAMPLES;
q31_t corr = 0;
q15_t max = -16000;
q15_t min = 16000;
for (uint8_t i = 0U; i < DMR_SYNC_LENGTH_SYMBOLS; i++) {
q15_t val = m_buffer[ptr];
if (val > max)
max = val;
if (val < min)
min = val;
switch (DMR_MS_DATA_SYNC_SYMBOLS_VALUES[i]) {
case +3:
corr -= (val + val + val);
break;
case +1:
corr -= val;
break;
case -1:
corr += val;
break;
default: // -3
corr += (val + val + val);
break;
}
ptr += DMR_RADIO_SYMBOL_LENGTH;
if (ptr >= DMR_FRAME_LENGTH_SAMPLES)
ptr -= DMR_FRAME_LENGTH_SAMPLES;
}
if (corr > m_maxCorr) {
q15_t centre = (max + min) >> 1;
q31_t v1 = (max - centre) * SCALING_FACTOR;
q15_t threshold = q15_t(v1 >> 15);
uint8_t sync[DMR_SYNC_BYTES_LENGTH];
uint16_t ptr = m_dataPtr + DMR_FRAME_LENGTH_SAMPLES - DMR_SYNC_LENGTH_SAMPLES + DMR_RADIO_SYMBOL_LENGTH;
if (ptr >= DMR_FRAME_LENGTH_SAMPLES)
ptr -= DMR_FRAME_LENGTH_SAMPLES;
samplesToBits(ptr, DMR_SYNC_LENGTH_SYMBOLS, sync, 4U, centre, threshold);
uint8_t errs = 0U;
for (uint8_t i = 0U; i < DMR_SYNC_BYTES_LENGTH; i++)
errs += countBits8((sync[i] & DMR_SYNC_BYTES_MASK[i]) ^ DMR_MS_DATA_SYNC_BYTES[i]);
if (errs <= MAX_SYNC_BYTES_ERRS) {
DEBUG3("DMRIdleRX: data sync found centre/threshold", centre, threshold);
m_maxCorr = corr;
m_centre = centre;
m_threshold = threshold;
m_endPtr = m_dataPtr + DMR_SLOT_TYPE_LENGTH_SAMPLES / 2U + DMR_INFO_LENGTH_SAMPLES / 2U - 1U;
if (m_endPtr >= DMR_FRAME_LENGTH_SAMPLES)
m_endPtr -= DMR_FRAME_LENGTH_SAMPLES;
}
}
m_buffer[m_dataPtr] = bit;
m_patternBuffer <<= 1;
if (bit)
m_patternBuffer |= 0x01U;
if (countBits64((m_patternBuffer & DMR_SYNC_BITS_MASK) ^ DMR_MS_DATA_SYNC_BITS) <= MAX_SYNC_BYTES_ERRS) {
m_endPtr = m_dataPtr + DMR_SLOT_TYPE_LENGTH_BITS / 2U + DMR_INFO_LENGTH_BITS / 2U;
if (m_endPtr >= DMR_FRAME_LENGTH_BITS)
m_endPtr -= DMR_FRAME_LENGTH_BITS;
DEBUG3("SYNC MS Data found pos/end:", m_dataPtr, m_endPtr);
}
if (m_dataPtr == m_endPtr) {
uint16_t ptr = m_endPtr + DMR_RADIO_SYMBOL_LENGTH + 1U;
if (ptr >= DMR_FRAME_LENGTH_SAMPLES)
ptr -= DMR_FRAME_LENGTH_SAMPLES;
uint16_t ptr = m_endPtr + 2;
if (ptr >= DMR_FRAME_LENGTH_BITS)
ptr -= DMR_FRAME_LENGTH_BITS;
uint8_t frame[DMR_FRAME_LENGTH_BYTES + 1U];
samplesToBits(ptr, DMR_FRAME_LENGTH_SYMBOLS, frame, 8U, m_centre, m_threshold);
bitsToBytes(ptr, DMR_FRAME_LENGTH_BITS, frame + 1U);
uint8_t colorCode;
uint8_t dataType;
@ -164,48 +86,29 @@ void CDMRIdleRX::processSample(q15_t sample)
}
m_endPtr = NOENDPTR;
m_maxCorr = 0;
}
m_dataPtr++;
if (m_dataPtr >= DMR_FRAME_LENGTH_SAMPLES)
if (m_dataPtr >= DMR_FRAME_LENGTH_BITS)
m_dataPtr = 0U;
m_bitPtr++;
if (m_bitPtr >= DMR_RADIO_SYMBOL_LENGTH)
m_bitPtr = 0U;
}
void CDMRIdleRX::samplesToBits(uint16_t start, uint8_t count, uint8_t* buffer, uint16_t offset, q15_t centre, q15_t threshold)
void CDMRIdleRX::bitsToBytes(uint16_t start, uint8_t count, uint8_t* buffer)
{
for (uint8_t i = 0U; i < count; i++) {
q15_t sample = m_buffer[start] - centre;
if (sample < -threshold) {
WRITE_BIT1(buffer, offset, false);
offset++;
WRITE_BIT1(buffer, offset, true);
offset++;
} else if (sample < 0) {
WRITE_BIT1(buffer, offset, false);
offset++;
WRITE_BIT1(buffer, offset, false);
offset++;
} else if (sample < threshold) {
WRITE_BIT1(buffer, offset, true);
offset++;
WRITE_BIT1(buffer, offset, false);
offset++;
} else {
WRITE_BIT1(buffer, offset, true);
offset++;
WRITE_BIT1(buffer, offset, true);
offset++;
}
start += DMR_RADIO_SYMBOL_LENGTH;
if (start >= DMR_FRAME_LENGTH_SAMPLES)
start -= DMR_FRAME_LENGTH_SAMPLES;
buffer[i] = 0U;
buffer[i] |= ((m_buffer[start + 0U] & 0x01) << 7);
buffer[i] |= ((m_buffer[start + 1U] & 0x01) << 6);
buffer[i] |= ((m_buffer[start + 2U] & 0x01) << 5);
buffer[i] |= ((m_buffer[start + 3U] & 0x01) << 4);
buffer[i] |= ((m_buffer[start + 4U] & 0x01) << 3);
buffer[i] |= ((m_buffer[start + 5U] & 0x01) << 2);
buffer[i] |= ((m_buffer[start + 6U] & 0x01) << 1);
buffer[i] |= ((m_buffer[start + 7U] & 0x01) << 0);
start += 8U;
if (start >= DMR_FRAME_LENGTH_BITS)
start -= DMR_FRAME_LENGTH_BITS;
}
}

17
DMRIdleRX.h
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@ -1,5 +1,6 @@
/*
* Copyright (C) 2015 by Jonathan Naylor G4KLX
* Copyright (C) 2017 by Andy Uribe CA6JAU
*
* 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
@ -19,34 +20,30 @@
#if !defined(DMRIDLERX_H)
#define DMRIDLERX_H
#include "Config.h"
#if defined(DUPLEX)
#include "Config.h"
#include "DMRDefines.h"
class CDMRIdleRX {
public:
CDMRIdleRX();
void samples(const q15_t* samples, uint8_t length);
void databit(bool bit);
void setColorCode(uint8_t colorCode);
void reset();
private:
uint32_t m_bitBuffer[DMR_RADIO_SYMBOL_LENGTH];
q15_t m_buffer[DMR_FRAME_LENGTH_SAMPLES];
uint16_t m_bitPtr;
uint64_t m_patternBuffer;
uint8_t m_buffer[DMR_FRAME_LENGTH_BITS];
uint16_t m_dataPtr;
uint16_t m_endPtr;
q31_t m_maxCorr;
q15_t m_centre;
q15_t m_threshold;
uint8_t m_colorCode;
void processSample(q15_t sample);
void samplesToBits(uint16_t start, uint8_t count, uint8_t* buffer, uint16_t offset, q15_t centre, q15_t threshold);
void bitsToBytes(uint16_t start, uint8_t count, uint8_t* buffer);
};
#endif

30
DMRRX.cpp
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@ -1,5 +1,6 @@
/*
* Copyright (C) 2015,2016 by Jonathan Naylor G4KLX
* Copyright (C) 2017 by Andy Uribe CA6JAU
*
* 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
@ -16,9 +17,10 @@
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "Config.h"
#if defined(DUPLEX)
#include "Config.h"
#include "Globals.h"
#include "DMRRX.h"
@ -28,25 +30,23 @@ m_slot2RX(true)
{
}
void CDMRRX::samples(const q15_t* samples, const uint16_t* rssi, const uint8_t* control, uint8_t length)
void CDMRRX::databit(bool bit, const uint8_t control)
{
bool dcd1 = false;
bool dcd2 = false;
for (uint16_t i = 0U; i < length; i++) {
switch (control[i]) {
case MARK_SLOT1:
m_slot1RX.start();
break;
case MARK_SLOT2:
m_slot2RX.start();
break;
default:
break;
}
switch (control) {
case MARK_SLOT1:
m_slot1RX.start();
break;
case MARK_SLOT2:
m_slot2RX.start();
break;
default:
break;
dcd1 = m_slot1RX.processSample(samples[i], rssi[i]);
dcd2 = m_slot2RX.processSample(samples[i], rssi[i]);
dcd1 = m_slot1RX.databit(bit);
dcd2 = m_slot2RX.databit(bit);
}
io.setDecode(dcd1 || dcd2);

6
DMRRX.h
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@ -1,5 +1,6 @@
/*
* Copyright (C) 2015,2016 by Jonathan Naylor G4KLX
* Copyright (C) 2017 by Andy Uribe CA6JAU
*
* 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
@ -19,16 +20,17 @@
#if !defined(DMRRX_H)
#define DMRRX_H
#include "Config.h"
#if defined(DUPLEX)
#include "Config.h"
#include "DMRSlotRX.h"
class CDMRRX {
public:
CDMRRX();
void samples(const q15_t* samples, const uint16_t* rssi, const uint8_t* control, uint8_t length);
void databit(bool bit, const uint8_t control);
void setColorCode(uint8_t colorCode);
void setDelay(uint8_t delay);

241
DMRSlotRX.cpp
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@ -1,5 +1,6 @@
/*
* Copyright (C) 2009-2017 by Jonathan Naylor G4KLX
* Copyright (C) 2017 by Andy Uribe CA6JAU
*
* 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
@ -16,11 +17,12 @@
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#if defined(DUPLEX)
#define WANT_DEBUG
#include "Config.h"
#if defined(DUPLEX)
#include "Globals.h"
#include "DMRSlotRX.h"
#include "DMRSlotType.h"
@ -29,17 +31,10 @@
const uint16_t SCAN_START = 400U;
const uint16_t SCAN_END = 490U;
const q15_t SCALING_FACTOR = 19505; // Q15(0.60)
const uint8_t MAX_SYNC_SYMBOLS_ERRS = 2U;
const uint8_t MAX_SYNC_BYTES_ERRS = 3U;
const uint8_t MAX_SYNC_BYTES_ERRS = 1U;
const uint8_t MAX_SYNC_LOST_FRAMES = 13U;
const uint8_t BIT_MASK_TABLE[] = {0x80U, 0x40U, 0x20U, 0x10U, 0x08U, 0x04U, 0x02U, 0x01U};
#define WRITE_BIT1(p,i,b) p[(i)>>3] = (b) ? (p[(i)>>3] | BIT_MASK_TABLE[(i)&7]) : (p[(i)>>3] & ~BIT_MASK_TABLE[(i)&7])
const uint16_t NOENDPTR = 9999U;
const uint8_t CONTROL_NONE = 0x00U;
@ -48,26 +43,20 @@ const uint8_t CONTROL_DATA = 0x40U;
CDMRSlotRX::CDMRSlotRX(bool slot) :
m_slot(slot),
m_bitBuffer(),
m_patternBuffer(0x00U),
m_buffer(),
m_bitPtr(0U),
m_dataPtr(0U),
m_syncPtr(0U),
m_startPtr(0U),
m_endPtr(NOENDPTR),
m_delayPtr(0U),
m_maxCorr(0),
m_centre(),
m_threshold(),
m_averagePtr(0U),
m_control(CONTROL_NONE),
m_syncCount(0U),
m_colorCode(0U),
m_delay(0U),
m_state(DMRRXS_NONE),
m_n(0U),
m_type(0U),
m_rssi()
m_type(0U)
{
}
@ -75,8 +64,6 @@ void CDMRSlotRX::start()
{
m_dataPtr = 0U;
m_delayPtr = 0U;
m_bitPtr = 0U;
m_maxCorr = 0;
m_control = CONTROL_NONE;
}
@ -85,8 +72,6 @@ void CDMRSlotRX::reset()
m_syncPtr = 0U;
m_dataPtr = 0U;
m_delayPtr = 0U;
m_bitPtr = 0U;
m_maxCorr = 0;
m_control = CONTROL_NONE;
m_syncCount = 0U;
m_state = DMRRXS_NONE;
@ -94,7 +79,7 @@ void CDMRSlotRX::reset()
m_endPtr = NOENDPTR;
}
bool CDMRSlotRX::processSample(q15_t sample, uint16_t rssi)
bool CDMRSlotRX::databit(bool bit)
{
m_delayPtr++;
if (m_delayPtr < m_delay)
@ -104,12 +89,11 @@ bool CDMRSlotRX::processSample(q15_t sample, uint16_t rssi)
if (m_dataPtr > m_endPtr || m_dataPtr >= 900U)
return m_state != DMRRXS_NONE;
m_buffer[m_dataPtr] = sample;
m_rssi[m_dataPtr] = rssi;
m_buffer[m_dataPtr] = bit;
m_bitBuffer[m_bitPtr] <<= 1;
if (sample < 0)
m_bitBuffer[m_bitPtr] |= 0x01U;
m_patternBuffer <<= 1;
if (bit)
m_patternBuffer |= 0x01U;
if (m_state == DMRRXS_NONE) {
if (m_dataPtr >= SCAN_START && m_dataPtr <= SCAN_END)
@ -123,15 +107,10 @@ bool CDMRSlotRX::processSample(q15_t sample, uint16_t rssi)
}
if (m_dataPtr == m_endPtr) {
// Find the average centre and threshold values
q15_t centre = (m_centre[0U] + m_centre[1U] + m_centre[2U] + m_centre[3U]) >> 2;
q15_t threshold = (m_threshold[0U] + m_threshold[1U] + m_threshold[2U] + m_threshold[3U]) >> 2;
uint8_t frame[DMR_FRAME_LENGTH_BYTES + 3U];
frame[0U] = m_control;
uint16_t ptr = m_endPtr - DMR_FRAME_LENGTH_SAMPLES + DMR_RADIO_SYMBOL_LENGTH + 1U;
samplesToBits(ptr, DMR_FRAME_LENGTH_SYMBOLS, frame, 8U, centre, threshold);
bitsToBytes(m_startPtr, DMR_FRAME_LENGTH_BYTES, frame + 1U);
if (m_control == CONTROL_DATA) {
// Data sync
@ -148,7 +127,7 @@ bool CDMRSlotRX::processSample(q15_t sample, uint16_t rssi)
switch (dataType) {
case DT_DATA_HEADER:
DEBUG5("DMRSlotRX: data header found slot/pos/centre/threshold", m_slot ? 2U : 1U, m_syncPtr, centre, threshold);
DEBUG3("DMRSlotRX: data header found slot/pos", m_slot ? 2U : 1U, m_syncPtr);
writeRSSIData(frame);
m_state = DMRRXS_DATA;
m_type = 0x00U;
@ -157,33 +136,33 @@ bool CDMRSlotRX::processSample(q15_t sample, uint16_t rssi)
case DT_RATE_34_DATA:
case DT_RATE_1_DATA:
if (m_state == DMRRXS_DATA) {
DEBUG5("DMRSlotRX: data payload found slot/pos/centre/threshold", m_slot ? 2U : 1U, m_syncPtr, centre, threshold);
DEBUG3("DMRSlotRX: data payload found slot/pos", m_slot ? 2U : 1U, m_syncPtr);
writeRSSIData(frame);
m_type = dataType;
}
break;
case DT_VOICE_LC_HEADER:
DEBUG5("DMRSlotRX: voice header found slot/pos/centre/threshold", m_slot ? 2U : 1U, m_syncPtr, centre, threshold);
DEBUG3("DMRSlotRX: voice header found slot/pos", m_slot ? 2U : 1U, m_syncPtr);
writeRSSIData(frame);
m_state = DMRRXS_VOICE;
break;
case DT_VOICE_PI_HEADER:
if (m_state == DMRRXS_VOICE) {
DEBUG5("DMRSlotRX: voice pi header found slot/pos/centre/threshold", m_slot ? 2U : 1U, m_syncPtr, centre, threshold);
DEBUG3("DMRSlotRX: voice pi header found slot/pos", m_slot ? 2U : 1U, m_syncPtr);
writeRSSIData(frame);
}
m_state = DMRRXS_VOICE;
break;
case DT_TERMINATOR_WITH_LC:
if (m_state == DMRRXS_VOICE) {
DEBUG5("DMRSlotRX: voice terminator found slot/pos/centre/threshold", m_slot ? 2U : 1U, m_syncPtr, centre, threshold);
DEBUG3("DMRSlotRX: voice terminator found slot/pos", m_slot ? 2U : 1U, m_syncPtr);
writeRSSIData(frame);
m_state = DMRRXS_NONE;
m_endPtr = NOENDPTR;
}
break;
default: // DT_CSBK
DEBUG5("DMRSlotRX: csbk found slot/pos/centre/threshold", m_slot ? 2U : 1U, m_syncPtr, centre, threshold);
DEBUG3("DMRSlotRX: csbk found slot/pos", m_slot ? 2U : 1U, m_syncPtr);
writeRSSIData(frame);
m_state = DMRRXS_NONE;
m_endPtr = NOENDPTR;
@ -192,7 +171,7 @@ bool CDMRSlotRX::processSample(q15_t sample, uint16_t rssi)
}
} else if (m_control == CONTROL_VOICE) {
// Voice sync
DEBUG5("DMRSlotRX: voice sync found slot/pos/centre/threshold", m_slot ? 2U : 1U, m_syncPtr, centre, threshold);
DEBUG3("DMRSlotRX: voice sync found slot/pos", m_slot ? 2U : 1U, m_syncPtr);
writeRSSIData(frame);
m_state = DMRRXS_VOICE;
m_syncCount = 0U;
@ -227,151 +206,43 @@ bool CDMRSlotRX::processSample(q15_t sample, uint16_t rssi)
m_dataPtr++;
m_bitPtr++;
if (m_bitPtr >= DMR_RADIO_SYMBOL_LENGTH)
m_bitPtr = 0U;
return m_state != DMRRXS_NONE;
}
void CDMRSlotRX::correlateSync(bool first)
{
uint8_t errs = countBits32((m_bitBuffer[m_bitPtr] & DMR_SYNC_SYMBOLS_MASK) ^ DMR_MS_DATA_SYNC_SYMBOLS);
// The voice sync is the complement of the data sync
bool data = (errs <= MAX_SYNC_SYMBOLS_ERRS);
bool voice = (errs >= (DMR_SYNC_LENGTH_SYMBOLS - MAX_SYNC_SYMBOLS_ERRS));
if (data || voice) {
uint16_t ptr = m_dataPtr - DMR_SYNC_LENGTH_SAMPLES + DMR_RADIO_SYMBOL_LENGTH;
q31_t corr = 0;
q15_t min = 16000;
q15_t max = -16000;
for (uint8_t i = 0U; i < DMR_SYNC_LENGTH_SYMBOLS; i++) {
q15_t val = m_buffer[ptr];
if (val > max)
max = val;
if (val < min)
min = val;
int8_t corrVal;
if (data)
corrVal = DMR_MS_DATA_SYNC_SYMBOLS_VALUES[i];
else
corrVal = DMR_MS_VOICE_SYNC_SYMBOLS_VALUES[i];
switch (corrVal) {
case +3:
corr -= (val + val + val);
break;
case +1:
corr -= val;
break;
case -1:
corr += val;
break;
default: // -3
corr += (val + val + val);
break;
}
ptr += DMR_RADIO_SYMBOL_LENGTH;
}
{
if (countBits64((m_patternBuffer & DMR_SYNC_BITS_MASK) ^ DMR_MS_DATA_SYNC_BITS) <= MAX_SYNC_BYTES_ERRS) {
m_control = CONTROL_DATA;
m_syncPtr = m_dataPtr;
m_startPtr = m_dataPtr - DMR_SLOT_TYPE_LENGTH_BITS / 2U - DMR_INFO_LENGTH_BITS / 2U - DMR_SYNC_LENGTH_BITS + 1;
m_endPtr = m_dataPtr + DMR_SLOT_TYPE_LENGTH_BITS / 2U + DMR_INFO_LENGTH_BITS / 2U;
DEBUG4("SYNC MS Data found pos/start/end:", m_dataPtr, m_startPtr, m_endPtr);
} else if (countBits64((m_patternBuffer & DMR_SYNC_BITS_MASK) ^ DMR_MS_VOICE_SYNC_BITS) <= MAX_SYNC_BYTES_ERRS) {
if (corr > m_maxCorr) {
q15_t centre = (max + min) >> 1;
q31_t v1 = (max - centre) * SCALING_FACTOR;
q15_t threshold = q15_t(v1 >> 15);
uint8_t sync[DMR_SYNC_BYTES_LENGTH];
uint16_t ptr = m_dataPtr - DMR_SYNC_LENGTH_SAMPLES + DMR_RADIO_SYMBOL_LENGTH;
samplesToBits(ptr, DMR_SYNC_LENGTH_SYMBOLS, sync, 4U, centre, threshold);
if (data) {
uint8_t errs = 0U;
for (uint8_t i = 0U; i < DMR_SYNC_BYTES_LENGTH; i++)
errs += countBits8((sync[i] & DMR_SYNC_BYTES_MASK[i]) ^ DMR_MS_DATA_SYNC_BYTES[i]);
if (errs <= MAX_SYNC_BYTES_ERRS) {
if (first) {
m_threshold[0U] = m_threshold[1U] = m_threshold[2U] = m_threshold[3U] = threshold;
m_centre[0U] = m_centre[1U] = m_centre[2U] = m_centre[3U] = centre;
m_averagePtr = 0U;
} else {
m_threshold[m_averagePtr] = threshold;
m_centre[m_averagePtr] = centre;
m_averagePtr++;
if (m_averagePtr >= 4U)
m_averagePtr = 0U;
}
m_maxCorr = corr;
m_control = CONTROL_DATA;
m_syncPtr = m_dataPtr;
m_startPtr = m_dataPtr - DMR_SLOT_TYPE_LENGTH_SAMPLES / 2U - DMR_INFO_LENGTH_SAMPLES / 2U - DMR_SYNC_LENGTH_SAMPLES;
m_endPtr = m_dataPtr + DMR_SLOT_TYPE_LENGTH_SAMPLES / 2U + DMR_INFO_LENGTH_SAMPLES / 2U - 1U;
}
} else { // if (voice)
uint8_t errs = 0U;
for (uint8_t i = 0U; i < DMR_SYNC_BYTES_LENGTH; i++)
errs += countBits8((sync[i] & DMR_SYNC_BYTES_MASK[i]) ^ DMR_MS_VOICE_SYNC_BYTES[i]);
if (errs <= MAX_SYNC_BYTES_ERRS) {
if (first) {
m_threshold[0U] = m_threshold[1U] = m_threshold[2U] = m_threshold[3U] = threshold;
m_centre[0U] = m_centre[1U] = m_centre[2U] = m_centre[3U] = centre;
m_averagePtr = 0U;
} else {
m_threshold[m_averagePtr] = threshold;
m_centre[m_averagePtr] = centre;
m_averagePtr++;
if (m_averagePtr >= 4U)
m_averagePtr = 0U;
}
m_maxCorr = corr;
m_control = CONTROL_VOICE;
m_syncPtr = m_dataPtr;
m_startPtr = m_dataPtr - DMR_SLOT_TYPE_LENGTH_SAMPLES / 2U - DMR_INFO_LENGTH_SAMPLES / 2U - DMR_SYNC_LENGTH_SAMPLES;
m_endPtr = m_dataPtr + DMR_SLOT_TYPE_LENGTH_SAMPLES / 2U + DMR_INFO_LENGTH_SAMPLES / 2U - 1U;
}
}
}
m_control = CONTROL_VOICE;
m_syncPtr = m_dataPtr;
m_startPtr = m_dataPtr - DMR_SLOT_TYPE_LENGTH_BITS / 2U - DMR_INFO_LENGTH_BITS / 2U - DMR_SYNC_LENGTH_BITS + 1;
m_endPtr = m_dataPtr + DMR_SLOT_TYPE_LENGTH_BITS / 2U + DMR_INFO_LENGTH_BITS / 2U;
DEBUG4("SYNC MS Voice found pos/start/end: ", m_dataPtr, m_startPtr, m_endPtr);
}
}
void CDMRSlotRX::samplesToBits(uint16_t start, uint8_t count, uint8_t* buffer, uint16_t offset, q15_t centre, q15_t threshold)
void CDMRSlotRX::bitsToBytes(uint16_t start, uint8_t count, uint8_t* buffer)
{
for (uint8_t i = 0U; i < count; i++, start += DMR_RADIO_SYMBOL_LENGTH) {
q15_t sample = m_buffer[start] - centre;
if (sample < -threshold) {
WRITE_BIT1(buffer, offset, false);
offset++;
WRITE_BIT1(buffer, offset, true);
offset++;
} else if (sample < 0) {
WRITE_BIT1(buffer, offset, false);
offset++;
WRITE_BIT1(buffer, offset, false);
offset++;
} else if (sample < threshold) {
WRITE_BIT1(buffer, offset, true);
offset++;
WRITE_BIT1(buffer, offset, false);
offset++;
} else {
WRITE_BIT1(buffer, offset, true);
offset++;
WRITE_BIT1(buffer, offset, true);
offset++;
}
for (uint8_t i = 0U; i < count; i++) {
buffer[i] = 0U;
buffer[i] |= ((m_buffer[start + 0U] & 0x01) << 7);
buffer[i] |= ((m_buffer[start + 1U] & 0x01) << 6);
buffer[i] |= ((m_buffer[start + 2U] & 0x01) << 5);
buffer[i] |= ((m_buffer[start + 3U] & 0x01) << 4);
buffer[i] |= ((m_buffer[start + 4U] & 0x01) << 3);
buffer[i] |= ((m_buffer[start + 5U] & 0x01) << 2);
buffer[i] |= ((m_buffer[start + 6U] & 0x01) << 1);
buffer[i] |= ((m_buffer[start + 7U] & 0x01) << 0);
start += 8U;
}
}
@ -388,17 +259,11 @@ void CDMRSlotRX::setDelay(uint8_t delay)
void CDMRSlotRX::writeRSSIData(uint8_t* frame)
{
#if defined(SEND_RSSI_DATA)
// Calculate RSSI average over a burst period. We don't take into account 2.5 ms at the beginning and 2.5 ms at the end
uint16_t start = m_startPtr + DMR_SYNC_LENGTH_SAMPLES / 2U;
uint32_t accum = 0U;
for (uint16_t i = 0U; i < (DMR_FRAME_LENGTH_SAMPLES - DMR_SYNC_LENGTH_SAMPLES); i++)
accum += m_rssi[start++];
uint16_t avg = accum / (DMR_FRAME_LENGTH_SAMPLES - DMR_SYNC_LENGTH_SAMPLES);
frame[34U] = (avg >> 8) & 0xFFU;
frame[35U] = (avg >> 0) & 0xFFU;
uint16_t rssi = io.readRSSI();
frame[34U] = (rssi >> 8) & 0xFFU;
frame[35U] = (rssi >> 0) & 0xFFU;
serial.writeDMRData(m_slot, frame, DMR_FRAME_LENGTH_BYTES + 3U);
#else
serial.writeDMRData(m_slot, frame, DMR_FRAME_LENGTH_BYTES + 1U);

18
DMRSlotRX.h
Unescape View File

@ -1,5 +1,6 @@
/*
* Copyright (C) 2015,2016,2017 by Jonathan Naylor G4KLX
* Copyright (C) 2017 by Andy Uribe CA6JAU
*
* 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
@ -19,9 +20,10 @@
#if !defined(DMRSLOTRX_H)
#define DMRSLOTRX_H
#include "Config.h"
#if defined(DUPLEX)
#include "Config.h"
#include "DMRDefines.h"
enum DMRRX_STATE {
@ -36,7 +38,7 @@ public:
void start();
bool processSample(q15_t sample, uint16_t rssi);
bool databit(bool bit);
void setColorCode(uint8_t colorCode);
void setDelay(uint8_t delay);
@ -45,18 +47,13 @@ public:
private:
bool m_slot;
uint32_t m_bitBuffer[DMR_RADIO_SYMBOL_LENGTH];
q15_t m_buffer[900U];
uint16_t m_bitPtr;
uint64_t m_patternBuffer;
uint8_t m_buffer[900U];
uint16_t m_dataPtr;
uint16_t m_syncPtr;
uint16_t m_startPtr;
uint16_t m_endPtr;
uint16_t m_delayPtr;
q31_t m_maxCorr;
q15_t m_centre[4U];
q15_t m_threshold[4U];
uint8_t m_averagePtr;
uint8_t m_control;
uint8_t m_syncCount;
uint8_t m_colorCode;
@ -64,10 +61,9 @@ private:
DMRRX_STATE m_state;
uint8_t m_n;
uint8_t m_type;
uint16_t m_rssi[900U];
void correlateSync(bool first);
void samplesToBits(uint16_t start, uint8_t count, uint8_t* buffer, uint16_t offset, q15_t centre, q15_t threshold);
void bitsToBytes(uint16_t start, uint8_t count, uint8_t* buffer);
void writeRSSIData(uint8_t* frame);
};

92
DMRTX.cpp
Unescape View File

@ -18,31 +18,14 @@
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#if defined(DUPLEX)
// #define WANT_DEBUG
#include "Config.h"
#include "Globals.h"
#include "DMRSlotType.h"
#if defined(WIDE_C4FSK_FILTERS_TX)
// Generated using rcosdesign(0.2, 4, 5, 'sqrt') in MATLAB
static q15_t DMR_C4FSK_FILTER[] = {0, 0, 0, 0, 688, -680, -2158, -3060, -2724, -775, 2684, 7041, 11310, 14425, 15565, 14425,
11310, 7041, 2684, -775, -2724, -3060, -2158, -680, 688}; // numTaps = 25, L = 5
const uint16_t DMR_C4FSK_FILTER_PHASE_LEN = 5U; // phaseLength = numTaps/L
#else
// Generated using rcosdesign(0.2, 8, 5, 'sqrt') in MATLAB
static q15_t DMR_C4FSK_FILTER[] = {0, 0, 0, 0, 401, 104, -340, -731, -847, -553, 112, 909, 1472, 1450, 683, -675, -2144, -3040, -2706, -770, 2667, 6995,
11237, 14331, 15464, 14331, 11237, 6995, 2667, -770, -2706, -3040, -2144, -675, 683, 1450, 1472, 909, 112,
-553, -847, -731, -340, 104, 401}; // numTaps = 45, L = 5
const uint16_t DMR_C4FSK_FILTER_PHASE_LEN = 9U; // phaseLength = numTaps/L
#endif
#if defined(DUPLEX)
const q15_t DMR_LEVELA = 2889;
const q15_t DMR_LEVELB = 963;
const q15_t DMR_LEVELC = -963;
const q15_t DMR_LEVELD = -2889;
#include "Globals.h"
#include "DMRSlotType.h"
// The PR FILL and BS Data Sync pattern.
const uint8_t IDLE_DATA[] =
@ -68,8 +51,6 @@ const uint32_t STARTUP_COUNT = 20U;
CDMRTX::CDMRTX() :
m_fifo(),
m_modFilter(),
m_modState(),
m_state(DMRTXSTATE_IDLE),
m_idle(),
m_cachPtr(0U),
@ -82,13 +63,6 @@ m_poPtr(0U),
m_frameCount(0U),
m_abort()
{
::memset(m_modState, 0x00U, 16U * sizeof(q15_t));
m_modFilter.L = DMR_RADIO_SYMBOL_LENGTH;
m_modFilter.phaseLength = DMR_C4FSK_FILTER_PHASE_LEN;
m_modFilter.pCoeffs = DMR_C4FSK_FILTER;
m_modFilter.pState = m_modState;
::memcpy(m_newShortLC, EMPTY_SHORT_LC, 12U);
::memcpy(m_shortLC, EMPTY_SHORT_LC, 12U);
@ -119,7 +93,6 @@ void CDMRTX::process()
break;
case DMRTXSTATE_CAL:
createCal();
break;
default:
@ -132,14 +105,14 @@ void CDMRTX::process()
if (m_poLen > 0U) {
uint16_t space = io.getSpace();
while (space > (4U * DMR_RADIO_SYMBOL_LENGTH)) {
while (space > 8U) {
uint8_t c = m_poBuffer[m_poPtr];
uint8_t m = m_markBuffer[m_poPtr];
m_poPtr++;
writeByte(c, m);
space -= 4U * DMR_RADIO_SYMBOL_LENGTH;
space -= 8U;
if (m_poPtr >= m_poLen) {
m_poPtr = 0U;
@ -243,42 +216,22 @@ void CDMRTX::setStart(bool start)
m_abort[1U] = false;
}
void CDMRTX::setCal(bool start)
{
m_state = start ? DMRTXSTATE_CAL : DMRTXSTATE_IDLE;
}
void CDMRTX::writeByte(uint8_t c, uint8_t control)
{
q15_t inBuffer[4U];
q15_t outBuffer[DMR_RADIO_SYMBOL_LENGTH * 4U];
uint8_t bit;
uint8_t mask = 0x80U;
const uint8_t MASK = 0xC0U;
for (uint8_t i = 0U; i < 4U; i++, c <<= 2) {
switch (c & MASK) {
case 0xC0U:
inBuffer[i] = DMR_LEVELA;
break;
case 0x80U:
inBuffer[i] = DMR_LEVELB;
break;
case 0x00U:
inBuffer[i] = DMR_LEVELC;
break;
default:
inBuffer[i] = DMR_LEVELD;
break;
}
for (uint8_t i = 0U; i < 8U; i++, c <<= 1) {
if ((c & mask) == mask)
bit = 1U;
else
bit = 0U;
if( i != 3U)
control = MARK_NONE;
io.write(&bit, 1, &control);
}
uint8_t controlBuffer[DMR_RADIO_SYMBOL_LENGTH * 4U];
::memset(controlBuffer, MARK_NONE, DMR_RADIO_SYMBOL_LENGTH * 4U * sizeof(uint8_t));
controlBuffer[DMR_RADIO_SYMBOL_LENGTH * 2U] = control;
::arm_fir_interpolate_q15(&m_modFilter, inBuffer, outBuffer, 4U);
io.write(STATE_DMR, outBuffer, DMR_RADIO_SYMBOL_LENGTH * 4U, controlBuffer);
}
uint8_t CDMRTX::getSpace1() const
@ -311,17 +264,6 @@ void CDMRTX::createData(uint8_t slotIndex)
m_poPtr = 0U;
}
void CDMRTX::createCal()
{
for (unsigned int i = 0U; i < DMR_FRAME_LENGTH_BYTES; i++) {
m_poBuffer[i] = 0x5FU; // +3, +3, -3, -3 pattern for deviation cal.
m_markBuffer[i] = MARK_NONE;
}
m_poLen = DMR_FRAME_LENGTH_BYTES;
m_poPtr = 0U;
}
void CDMRTX::createCACH(uint8_t txSlotIndex, uint8_t rxSlotIndex)
{
m_frameCount++;

8
DMRTX.h
Unescape View File

@ -1,6 +1,7 @@
/*
* Copyright (C) 2015,2016,2017 by Jonathan Naylor G4KLX
* Copyright (C) 2016 by Colin Durbridge G4EML
* Copyright (C) 2017 by Andy Uribe CA6JAU
*
* 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
@ -20,9 +21,10 @@
#if !defined(DMRTX_H)
#define DMRTX_H
#include "Config.h"
#if defined(DUPLEX)
#include "Config.h"
#include "DMRDefines.h"
#include "SerialRB.h"
@ -47,7 +49,6 @@ public:
uint8_t writeAbort(const uint8_t* data, uint8_t length);
void setStart(bool start);
void setCal(bool start);
void process();
@ -58,8 +59,6 @@ public:
private:
CSerialRB m_fifo[2U];
arm_fir_interpolate_instance_q15 m_modFilter;
q15_t m_modState[16U]; // blockSize + phaseLength - 1, 4 + 9 - 1 plus some spare
DMRTXSTATE m_state;
uint8_t m_idle[DMR_FRAME_LENGTH_BYTES];
uint8_t m_cachPtr;
@ -74,7 +73,6 @@ private:
void createData(uint8_t slotIndex);
void createCACH(uint8_t txSlotIndex, uint8_t rxSlotIndex);
void createCal();
void writeByte(uint8_t c, uint8_t control);
};

17
Globals.h
Unescape View File

@ -35,10 +35,21 @@ enum MMDVM_STATE {
STATE_P25 = 4
};
const uint8_t MARK_SLOT1 = 0x08U;
const uint8_t MARK_SLOT2 = 0x04U;
const uint8_t MARK_NONE = 0x00U;
#include "IO.h"
#include "SerialPort.h"
#include "DMRDMORX.h"
#include "DMRDMOTX.h"
#if defined(DUPLEX)
#include "DMRIdleRX.h"
#include "DMRRX.h"
#include "DMRTX.h"
#endif
#include "DStarRX.h"
#include "DStarTX.h"
#include "YSFRX.h"
@ -69,6 +80,12 @@ extern CSerialPort serial;
extern CDStarRX dstarRX;
extern CDStarTX dstarTX;
#if defined(DUPLEX)
extern CDMRIdleRX dmrIdleRX;
extern CDMRRX dmrRX;
extern CDMRTX dmrTX;
#endif
extern CDMRDMORX dmrDMORX;
extern CDMRDMOTX dmrDMOTX;

15
IO.cpp
Unescape View File

@ -63,6 +63,7 @@ void CIO::process()
{
uint8_t bit;
uint32_t scantime;
uint8_t control;
m_ledCount++;
@ -116,7 +117,7 @@ void CIO::process()
}
if (m_rxBuffer.getData() >= 1U) {
m_rxBuffer.get(bit);
m_rxBuffer.get(bit, control);
switch (m_modemState_prev) {
case STATE_DSTAR:
@ -179,14 +180,18 @@ void CIO::start()
m_started = true;
}
void CIO::write(uint8_t* data, uint16_t length)
void CIO::write(uint8_t* data, uint16_t length, const uint8_t* control)
{
if (!m_started)
return;
for (uint16_t i = 0U; i < length; i++)
m_txBuffer.put(data[i]);
for (uint16_t i = 0U; i < length; i++) {
if (control == NULL)
m_txBuffer.put(data[i], MARK_NONE);
else
m_txBuffer.put(data[i], control[i]);
}
// Switch the transmitter on if needed
if (!m_tx) {
setTX();

2
IO.h
Unescape View File

@ -78,7 +78,7 @@ public:
#endif
// IO API
void write(uint8_t* data, uint16_t length);
void write(uint8_t* data, uint16_t length, const uint8_t* control = NULL);
uint16_t getSpace(void) const;
void process(void);
bool hasTXOverflow(void);

18
MMDVM_HS.cpp
Unescape View File

@ -42,6 +42,12 @@ bool m_dcd = false;
CDStarRX dstarRX;
CDStarTX dstarTX;
#if defined(DUPLEX)
CDMRIdleRX dmrIdleRX;
CDMRRX dmrRX;
CDMRTX dmrTX;
#endif
CDMRDMORX dmrDMORX;
CDMRDMOTX dmrDMOTX;
@ -69,9 +75,17 @@ void loop()
if (m_dstarEnable && m_modemState == STATE_DSTAR)
dstarTX.process();
if (m_dmrEnable && m_modemState == STATE_DMR)
if (m_dmrEnable && m_modemState == STATE_DMR) {
#if defined(DUPLEX)
if (m_duplex)
dmrTX.process();
else
dmrDMOTX.process();
#else
dmrDMOTX.process();
#endif
}
if (m_ysfEnable && m_modemState == STATE_YSF)
ysfTX.process();

16
MMDVM_HS.ino
Unescape View File

@ -38,6 +38,12 @@ bool m_dcd = false;
CDStarRX dstarRX;
CDStarTX dstarTX;
#if defined(DUPLEX)
CDMRIdleRX dmrIdleRX;
CDMRRX dmrRX;
CDMRTX dmrTX;
#endif
CDMRDMORX dmrDMORX;
CDMRDMOTX dmrDMOTX;
@ -64,8 +70,16 @@ void loop()
if (m_dstarEnable && m_modemState == STATE_DSTAR)
dstarTX.process();
if (m_dmrEnable && m_modemState == STATE_DMR)
if (m_dmrEnable && m_modemState == STATE_DMR) {
#if defined(DUPLEX)
if (m_duplex)
dmrTX.process();
else
dmrDMOTX.process();
#else
dmrDMOTX.process();
#endif
}
if (m_ysfEnable && m_modemState == STATE_YSF)
ysfTX.process();

2
SerialPort.cpp
Unescape View File

@ -230,6 +230,8 @@ uint8_t CSerialPort::setConfig(const uint8_t* data, uint8_t length)
uint8_t colorCode = data[6U];
if (colorCode > 15U)
return 4U;
uint8_t dmrDelay = data[7U];
m_modemState = modemState;

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