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/*
* Copyright (C) 2009-2017 by Jonathan Naylor G4KLX
* Copyright (C) 2017,2018 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
* the Free Software Foundation; either version 2 of the License, 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; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "Config.h"
#if defined(DUPLEX)
#include "Globals.h"
#include "DMRSlotRX.h"
#include "DMRSlotType.h"
#include "Utils.h"
const uint8_t MAX_SYNC_BYTES_ERRS = 3U;
const uint8_t MAX_SYNC_LOST_FRAMES = 13U;
const uint16_t NOENDPTR = 9999U;
const uint8_t CONTROL_NONE = 0x00U;
const uint8_t CONTROL_VOICE = 0x20U;
const uint8_t CONTROL_DATA = 0x40U;
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])
#define READ_BIT1(p,i) ((p[(i)>>3] & BIT_MASK_TABLE[(i)&7]) >> (7 - ((i)&7)))
CDMRSlotRX::CDMRSlotRX() :
m_slot(false),
m_patternBuffer(0x00U),
m_buffer(),
m_dataPtr(0U),
m_syncPtr1(0U),
m_startPtr1(0U),
m_endPtr1(NOENDPTR),
m_control1(CONTROL_NONE),
m_syncCount1(0U),
m_state1(DMRRXS_NONE),
m_n1(0U),
m_type1(0U),
m_syncPtr2(0U),
m_startPtr2(0U),
m_endPtr2(NOENDPTR),
m_control2(CONTROL_NONE),
m_syncCount2(0U),
m_state2(DMRRXS_NONE),
m_n2(0U),
m_type2(0U),
m_delayPtr(0U),
m_colorCode(0U),
m_delay(0U)
{
}
void CDMRSlotRX::start(bool slot)
{
m_slot = slot;
m_delayPtr = 0U;
}
void CDMRSlotRX::reset()
{
m_dataPtr = 0U;
m_delayPtr = 0U;
m_patternBuffer = 0U;
reset1();
reset2();
}
void CDMRSlotRX::reset1()
{
m_syncPtr1 = 0U;
m_control1 = CONTROL_NONE;
m_syncCount1 = 0U;
m_state1 = DMRRXS_NONE;
m_startPtr1 = 0U;
m_endPtr1 = NOENDPTR;
m_type1 = 0U;
m_n1 = 0U;
}
void CDMRSlotRX::reset2()
{
m_syncPtr2 = 0U;
m_control2 = CONTROL_NONE;
m_syncCount2 = 0U;
m_state2 = DMRRXS_NONE;
m_startPtr2 = 0U;
m_endPtr2 = NOENDPTR;
m_type2 = 0U;
m_n2 = 0U;
}
bool CDMRSlotRX::databit(bool bit)
{
uint16_t min, max;
m_delayPtr++;
if (m_delayPtr < m_delay)
return (m_state1 != DMRRXS_NONE) || (m_state2 != DMRRXS_NONE);
WRITE_BIT1(m_buffer, m_dataPtr, bit);
m_patternBuffer <<= 1;
if (bit)
m_patternBuffer |= 0x01U;
if (m_state1 == DMRRXS_NONE || m_state2 == DMRRXS_NONE) {
correlateSync();
} else {
if(m_slot) {
min = m_syncPtr2 + DMR_BUFFER_LENGTH_BITS - 2;
max = m_syncPtr2 + 2;
} else {
min = m_syncPtr1 + DMR_BUFFER_LENGTH_BITS - 2;
max = m_syncPtr1 + 2;
}
if (min >= DMR_BUFFER_LENGTH_BITS)
min -= DMR_BUFFER_LENGTH_BITS;
if (max >= DMR_BUFFER_LENGTH_BITS)
max -= DMR_BUFFER_LENGTH_BITS;
if (min < max) {
if (m_dataPtr >= min && m_dataPtr <= max)
correlateSync();
} else {
if (m_dataPtr >= min || m_dataPtr <= max)
correlateSync();
}
}
if(m_slot)
procSlot2();
else
procSlot1();
m_dataPtr++;
if (m_dataPtr >= DMR_BUFFER_LENGTH_BITS)
m_dataPtr = 0U;
return (m_state1 != DMRRXS_NONE) || (m_state2 != DMRRXS_NONE);;
}
void CDMRSlotRX::procSlot1()
{
if (m_dataPtr == m_endPtr1) {
frame1[0U] = m_control1;
bitsToBytes(m_startPtr1, DMR_FRAME_LENGTH_BYTES, frame1 + 1U);
if (m_control1 == CONTROL_DATA) {
// Data sync
uint8_t colorCode;
uint8_t dataType;
CDMRSlotType slotType;
slotType.decode(frame1 + 1U, colorCode, dataType);
if (colorCode == m_colorCode) {
m_syncCount1 = 0U;
m_n1 = 0U;
frame1[0U] |= dataType;
switch (dataType) {
case DT_DATA_HEADER:
DEBUG2("DMRSlot1RX: data header found pos", m_syncPtr1);
writeRSSIData1();
m_state1 = DMRRXS_DATA;
m_type1 = 0x00U;
break;
case DT_RATE_12_DATA:
case DT_RATE_34_DATA:
case DT_RATE_1_DATA:
if (m_state1 == DMRRXS_DATA) {
DEBUG2("DMRSlot1RX: data payload found pos", m_syncPtr1);
writeRSSIData1();
m_type1 = dataType;
}
break;
case DT_VOICE_LC_HEADER:
DEBUG2("DMRSlot1RX: voice header found pos", m_syncPtr1);
writeRSSIData1();
m_state1 = DMRRXS_VOICE;
break;
case DT_VOICE_PI_HEADER:
if (m_state1 == DMRRXS_VOICE) {
DEBUG2("DMRSlot1RX: voice pi header found pos", m_syncPtr1);
writeRSSIData1();
}
m_state1 = DMRRXS_VOICE;
break;
case DT_TERMINATOR_WITH_LC:
if (m_state1 == DMRRXS_VOICE) {
DEBUG2("DMRSlot1RX: voice terminator found pos", m_syncPtr1);
writeRSSIData1();
m_state1 = DMRRXS_NONE;
m_endPtr1 = NOENDPTR;
}
break;
default: // DT_CSBK
DEBUG2("DMRSlot1RX: csbk found pos", m_syncPtr1);
writeRSSIData1();
m_state1 = DMRRXS_NONE;
m_endPtr1 = NOENDPTR;
break;
}
}
} else if (m_control1 == CONTROL_VOICE) {
// Voice sync
DEBUG2("DMRSlot1RX: voice sync found pos", m_syncPtr1);
writeRSSIData1();
m_state1 = DMRRXS_VOICE;
m_syncCount1 = 0U;
m_n1 = 0U;
} else {
if (m_state1 != DMRRXS_NONE) {
m_syncCount1++;
if (m_syncCount1 >= MAX_SYNC_LOST_FRAMES) {
serial.writeDMRLost(0U);
reset1();
}
}
if (m_state1 == DMRRXS_VOICE) {
if (m_n1 >= 5U) {
frame1[0U] = CONTROL_VOICE;
m_n1 = 0U;
} else {
frame1[0U] = ++m_n1;
}
serial.writeDMRData(0U, frame1, DMR_FRAME_LENGTH_BYTES + 1U);
} else if (m_state1 == DMRRXS_DATA) {
if (m_type1 != 0x00U) {
frame1[0U] = CONTROL_DATA | m_type1;
writeRSSIData1();
}
}
}
// End of this slot, reset some items for the next slot.
m_control1 = CONTROL_NONE;
}
}
void CDMRSlotRX::procSlot2()
{
if (m_dataPtr == m_endPtr2) {
frame2[0U] = m_control2;
bitsToBytes(m_startPtr2, DMR_FRAME_LENGTH_BYTES, frame2 + 1U);
if (m_control2 == CONTROL_DATA) {
// Data sync
uint8_t colorCode;
uint8_t dataType;
CDMRSlotType slotType;
slotType.decode(frame2 + 1U, colorCode, dataType);
if (colorCode == m_colorCode) {
m_syncCount2 = 0U;
m_n2 = 0U;
frame2[0U] |= dataType;
switch (dataType) {
case DT_DATA_HEADER:
DEBUG2("DMRSlot2RX: data header found pos", m_syncPtr2);
writeRSSIData2();
m_state2 = DMRRXS_DATA;
m_type2 = 0x00U;
break;
case DT_RATE_12_DATA:
case DT_RATE_34_DATA:
case DT_RATE_1_DATA:
if (m_state2 == DMRRXS_DATA) {
DEBUG2("DMRSlot2RX: data payload found pos", m_syncPtr2);
writeRSSIData2();
m_type2 = dataType;
}
break;
case DT_VOICE_LC_HEADER:
DEBUG2("DMRSlot2RX: voice header found pos", m_syncPtr2);
writeRSSIData2();
m_state2 = DMRRXS_VOICE;
break;
case DT_VOICE_PI_HEADER:
if (m_state2 == DMRRXS_VOICE) {
DEBUG2("DMRSlot2RX: voice pi header found pos", m_syncPtr2);
writeRSSIData2();
}
m_state2 = DMRRXS_VOICE;
break;
case DT_TERMINATOR_WITH_LC:
if (m_state2 == DMRRXS_VOICE) {
DEBUG2("DMRSlot2RX: voice terminator found pos", m_syncPtr2);
writeRSSIData2();
m_state2 = DMRRXS_NONE;
m_endPtr2 = NOENDPTR;
}
break;
default: // DT_CSBK
DEBUG2("DMRSlot2RX: csbk found pos", m_syncPtr2);
writeRSSIData2();
m_state2 = DMRRXS_NONE;
m_endPtr2 = NOENDPTR;
break;
}
}
} else if (m_control2 == CONTROL_VOICE) {
// Voice sync
DEBUG2("DMRSlot2RX: voice sync found pos", m_syncPtr2);
writeRSSIData2();
m_state2 = DMRRXS_VOICE;
m_syncCount2 = 0U;
m_n2 = 0U;
} else {
if (m_state2 != DMRRXS_NONE) {
m_syncCount2++;
if (m_syncCount2 >= MAX_SYNC_LOST_FRAMES) {
serial.writeDMRLost(1U);
reset2();
}
}
if (m_state2 == DMRRXS_VOICE) {
if (m_n2 >= 5U) {
frame2[0U] = CONTROL_VOICE;
m_n2 = 0U;
} else {
frame2[0U] = ++m_n2;
}
serial.writeDMRData(1U, frame2, DMR_FRAME_LENGTH_BYTES + 1U);
} else if (m_state2 == DMRRXS_DATA) {
if (m_type2 != 0x00U) {
frame2[0U] = CONTROL_DATA | m_type2;
writeRSSIData2();
}
}
}
// End of this slot, reset some items for the next slot.
m_control2 = CONTROL_NONE;
}
}
void CDMRSlotRX::correlateSync()
{
uint16_t syncPtr;
uint16_t startPtr;
uint16_t endPtr;
uint8_t control;
if (countBits64((m_patternBuffer & DMR_SYNC_BITS_MASK) ^ DMR_MS_DATA_SYNC_BITS) <= MAX_SYNC_BYTES_ERRS) {
control = CONTROL_DATA;
syncPtr = m_dataPtr;
startPtr = m_dataPtr + DMR_BUFFER_LENGTH_BITS - DMR_SLOT_TYPE_LENGTH_BITS / 2U - DMR_INFO_LENGTH_BITS / 2U - DMR_SYNC_LENGTH_BITS + 1;
if (startPtr >= DMR_BUFFER_LENGTH_BITS)
startPtr -= DMR_BUFFER_LENGTH_BITS;
endPtr = m_dataPtr + DMR_SLOT_TYPE_LENGTH_BITS / 2U + DMR_INFO_LENGTH_BITS / 2U;
if (endPtr >= DMR_BUFFER_LENGTH_BITS)
endPtr -= DMR_BUFFER_LENGTH_BITS;
if(m_slot) {
m_syncPtr2 = syncPtr;
m_startPtr2 = startPtr;
m_endPtr2 = endPtr;
m_control2 = control;
} else {
m_syncPtr1 = syncPtr;
m_startPtr1 = startPtr;
m_endPtr1 = endPtr;
m_control1 = control;
}
DEBUG5("SYNC corr MS Data found slot/pos/start/end:", m_slot ? 2U : 1U, m_dataPtr, startPtr, endPtr);
} else if (countBits64((m_patternBuffer & DMR_SYNC_BITS_MASK) ^ DMR_MS_VOICE_SYNC_BITS) <= MAX_SYNC_BYTES_ERRS) {
control = CONTROL_VOICE;
syncPtr = m_dataPtr;
startPtr = m_dataPtr + DMR_BUFFER_LENGTH_BITS - DMR_SLOT_TYPE_LENGTH_BITS / 2U - DMR_INFO_LENGTH_BITS / 2U - DMR_SYNC_LENGTH_BITS + 1;
if (startPtr >= DMR_BUFFER_LENGTH_BITS)
startPtr -= DMR_BUFFER_LENGTH_BITS;
endPtr = m_dataPtr + DMR_SLOT_TYPE_LENGTH_BITS / 2U + DMR_INFO_LENGTH_BITS / 2U;
if (endPtr >= DMR_BUFFER_LENGTH_BITS)
endPtr -= DMR_BUFFER_LENGTH_BITS;
if(m_slot) {
m_syncPtr2 = syncPtr;
m_startPtr2 = startPtr;
m_endPtr2 = endPtr;
m_control2 = control;
} else {
m_syncPtr1 = syncPtr;
m_startPtr1 = startPtr;
m_endPtr1 = endPtr;
m_control1 = control;
}
DEBUG5("SYNC corr MS Voice found slot/pos/start/end: ", m_slot ? 2U : 1U, m_dataPtr, startPtr, endPtr);
}
}
void CDMRSlotRX::bitsToBytes(uint16_t start, uint8_t count, uint8_t* buffer)
{
for (uint8_t i = 0U; i < count; i++) {
buffer[i] = 0U;
buffer[i] |= READ_BIT1(m_buffer, start) << 7;
start++;
if (start >= DMR_BUFFER_LENGTH_BITS)
start -= DMR_BUFFER_LENGTH_BITS;
buffer[i] |= READ_BIT1(m_buffer, start) << 6;
start++;
if (start >= DMR_BUFFER_LENGTH_BITS)
start -= DMR_BUFFER_LENGTH_BITS;
buffer[i] |= READ_BIT1(m_buffer, start) << 5;
start++;
if (start >= DMR_BUFFER_LENGTH_BITS)
start -= DMR_BUFFER_LENGTH_BITS;
buffer[i] |= READ_BIT1(m_buffer, start) << 4;
start++;
if (start >= DMR_BUFFER_LENGTH_BITS)
start -= DMR_BUFFER_LENGTH_BITS;
buffer[i] |= READ_BIT1(m_buffer, start) << 3;
start++;
if (start >= DMR_BUFFER_LENGTH_BITS)
start -= DMR_BUFFER_LENGTH_BITS;
buffer[i] |= READ_BIT1(m_buffer, start) << 2;
start++;
if (start >= DMR_BUFFER_LENGTH_BITS)
start -= DMR_BUFFER_LENGTH_BITS;
buffer[i] |= READ_BIT1(m_buffer, start) << 1;
start++;
if (start >= DMR_BUFFER_LENGTH_BITS)
start -= DMR_BUFFER_LENGTH_BITS;
buffer[i] |= READ_BIT1(m_buffer, start) << 0;
start++;
if (start >= DMR_BUFFER_LENGTH_BITS)
start -= DMR_BUFFER_LENGTH_BITS;
}
}
void CDMRSlotRX::setColorCode(uint8_t colorCode)
{
m_colorCode = colorCode;
}
void CDMRSlotRX::setDelay(uint8_t delay)
{
m_delay = delay / 5;
}
void CDMRSlotRX::writeRSSIData1()
{
#if defined(SEND_RSSI_DATA)
uint16_t rssi = io.readRSSI();
frame1[34U] = (rssi >> 8) & 0xFFU;
frame1[35U] = (rssi >> 0) & 0xFFU;
serial.writeDMRData(0U, frame1, DMR_FRAME_LENGTH_BYTES + 3U);
#else
serial.writeDMRData(0U, frame1, DMR_FRAME_LENGTH_BYTES + 1U);
#endif
}
void CDMRSlotRX::writeRSSIData2()
{
#if defined(SEND_RSSI_DATA)
uint16_t rssi = io.readRSSI();
frame2[34U] = (rssi >> 8) & 0xFFU;
frame2[35U] = (rssi >> 0) & 0xFFU;
serial.writeDMRData(1U, frame2, DMR_FRAME_LENGTH_BYTES + 3U);
#else
serial.writeDMRData(1U, frame2, DMR_FRAME_LENGTH_BYTES + 1U);
#endif
}
#endif
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