Initial work on M17 support. ADF7021 parameters not correct or complete yet.

ADF7021.cpp

@@ -1,4 +1,5 @@
 /*
+ *   Copyright (C) 2020 by Jonathan Naylor G4KLX
  *   Copyright (C) 2016 by Jim McLaughlin KI6ZUM
  *   Copyright (C) 2016,2017,2018,2019 by Andy Uribe CA6JAU
  *   Copyright (C) 2017 by Danilo DB4PLE
@@ -48,6 +49,7 @@ uint16_t           m_dmrDev;
 uint16_t           m_ysfDev;
 uint16_t           m_p25Dev;
 uint16_t           m_nxdnDev;
+uint16_t           m_m17Dev;
 uint16_t           m_pocsagDev;
 
 static void Send_AD7021_control_shift()
@@ -273,6 +275,9 @@ void CIO::ifConf(MMDVM_STATE modemState, bool reset)
     case STATE_NXDN:
       AFC_OFFSET = AFC_OFFSET_NXDN;
       break;
+    case STATE_M17:
+      AFC_OFFSET = AFC_OFFSET_M17;
+      break;
     default:
       break;
   }
@@ -499,6 +504,33 @@ void CIO::ifConf(MMDVM_STATE modemState, bool reset)
 #endif
       break;
 
+    case STATE_M17:
+      // Dev: +1 symb 600 Hz, symb rate = 4800
+
+      ADF7021_REG3 = ADF7021_REG3_M17;
+      ADF7021_REG10 = ADF7021_REG10_M17;
+
+      // K=32
+      ADF7021_REG4  = (uint32_t) 0b0100                    << 0;   // register 4
+      ADF7021_REG4 |= (uint32_t) 0b011                     << 4;   // mode, 4FSK
+      ADF7021_REG4 |= (uint32_t) 0b0                       << 7;
+      ADF7021_REG4 |= (uint32_t) 0b11                      << 8;
+      ADF7021_REG4 |= (uint32_t) ADF7021_DISC_BW_M17       << 10;  // Disc BW
+      ADF7021_REG4 |= (uint32_t) ADF7021_POST_BW_M17       << 20;  // Post dem BW
+      ADF7021_REG4 |= (uint32_t) 0b00                      << 30;  // IF filter (12.5 kHz)
+
+      ADF7021_REG13 = (uint32_t) 0b1101                    << 0;   // register 13
+      ADF7021_REG13 |= (uint32_t) ADF7021_SLICER_TH_M17    << 4;   // slicer threshold
+
+      ADF7021_REG2 = (uint32_t) 0b10                       << 28;  // invert data (and RC alpha = 0.5)
+      ADF7021_REG2 |= (uint32_t) (m_m17Dev / div2)         << 19;  // deviation
+#if defined(ADF7021_DISABLE_RC_4FSK)
+      ADF7021_REG2 |= (uint32_t) 0b011                     << 4;   // modulation (4FSK)
+#else
+      ADF7021_REG2 |= (uint32_t) 0b111                     << 4;   // modulation (RC 4FSK)
+#endif
+      break;
+
     default:
       break;
   }
@@ -721,6 +753,29 @@ void CIO::ifConf2(MMDVM_STATE modemState)
       ADF7021_REG2 |= (uint32_t) 0b111                     << 4;   // modulation (RC 4FSK)
       break;
 
+    case STATE_M17:
+      // Dev: +1 symb 600 Hz, symb rate = 4800
+
+      ADF7021_REG3 = ADF7021_REG3_M17;
+      ADF7021_REG10 = ADF7021_REG10_M17;
+
+      // K=32
+      ADF7021_REG4  = (uint32_t) 0b0100                    << 0;   // register 4
+      ADF7021_REG4 |= (uint32_t) 0b011                     << 4;   // mode, 4FSK
+      ADF7021_REG4 |= (uint32_t) 0b0                       << 7;
+      ADF7021_REG4 |= (uint32_t) 0b11                      << 8;
+      ADF7021_REG4 |= (uint32_t) ADF7021_DISC_BW_M17       << 10;  // Disc BW
+      ADF7021_REG4 |= (uint32_t) ADF7021_POST_BW_M17       << 20;  // Post dem BW
+      ADF7021_REG4 |= (uint32_t) 0b00                      << 30;  // IF filter (12.5 kHz)
+
+      ADF7021_REG13 = (uint32_t) 0b1101                    << 0;   // register 13
+      ADF7021_REG13 |= (uint32_t) ADF7021_SLICER_TH_M17    << 4;   // slicer threshold
+
+      ADF7021_REG2 = (uint32_t) 0b10                       << 28;  // invert data (and RC alpha = 0.5)
+      ADF7021_REG2 |= (uint32_t) (m_m17Dev / div2)  << 19;  // deviation
+      ADF7021_REG2 |= (uint32_t) 0b111                     << 4;   // modulation (RC 4FSK)
+      break;
+
     default:
       break;
   }
@@ -959,7 +1014,7 @@ void CIO::setPower(uint8_t power)
   m_power = power >> 2;
 }
 
-void CIO::setDeviations(uint8_t dstarTXLevel, uint8_t dmrTXLevel, uint8_t ysfTXLevel, uint8_t p25TXLevel, uint8_t nxdnTXLevel, uint8_t pocsagTXLevel, bool ysfLoDev)
+void CIO::setDeviations(uint8_t dstarTXLevel, uint8_t dmrTXLevel, uint8_t ysfTXLevel, uint8_t p25TXLevel, uint8_t nxdnTXLevel, uint8_t m17TXLevel, uint8_t pocsagTXLevel, bool ysfLoDev)
 {
   m_dstarDev = uint16_t((ADF7021_DEV_DSTAR * uint16_t(dstarTXLevel)) / 128U);
   m_dmrDev = uint16_t((ADF7021_DEV_DMR * uint16_t(dmrTXLevel)) / 128U);
@@ -971,6 +1026,7 @@ void CIO::setDeviations(uint8_t dstarTXLevel, uint8_t dmrTXLevel, uint8_t ysfTXL
 
   m_p25Dev = uint16_t((ADF7021_DEV_P25 * uint16_t(p25TXLevel)) / 128U);
   m_nxdnDev = uint16_t((ADF7021_DEV_NXDN * uint16_t(nxdnTXLevel)) / 128U);
+  m_m17Dev = uint16_t((ADF7021_DEV_M17 * uint16_t(m17TXLevel)) / 128U);
   m_pocsagDev = uint16_t((ADF7021_DEV_POCSAG * uint16_t(pocsagTXLevel)) / 128U);
 }
 
@@ -1090,6 +1146,11 @@ uint16_t CIO::devNXDN()
   return (uint16_t)((ADF7021_PFD * m_nxdnDev) / (f_div * 65536));
 }
 
+uint16_t CIO::devM17()
+{
+  return (uint16_t)((ADF7021_PFD * m_m17Dev) / (f_div * 65536));
+}
+
 uint16_t CIO::devPOCSAG()
 {
   return (uint16_t)((ADF7021_PFD * m_pocsagDev) / (f_div * 65536));
@@ -1106,6 +1167,7 @@ void CIO::printConf()
   DEBUG2("YSF +1 sym dev (Hz):", devYSF());
   DEBUG2("P25 +1 sym dev (Hz):", devP25());
   DEBUG2("NXDN +1 sym dev (Hz):", devNXDN());
+  DEBUG2("M17 +1 sym dev (Hz):", devM17());
   DEBUG2("POCSAG dev (Hz):", devPOCSAG());
 }
 

ADF7021.h

@@ -87,6 +87,7 @@ www.analog.com/media/en/technical-documentation/data-sheets/ADF7021.pdf
 #define ADF7021_DEV_P25          22U
 #endif
 #define ADF7021_DEV_NXDN         13U
+#define ADF7021_DEV_M17          23U		// XXX FIXME
 #define ADF7021_DEV_POCSAG       160U
 
 // TX/RX CLOCK register (REG 03)
@@ -97,12 +98,14 @@ www.analog.com/media/en/technical-documentation/data-sheets/ADF7021.pdf
 #define ADF7021_REG3_YSF_H       0x2A4C0493
 #define ADF7021_REG3_P25         0x2A4C04D3
 #define ADF7021_REG3_NXDN        0x2A4C04D3
+#define ADF7021_REG3_M17         0x2A4C04D3	// XXX FIXME
 #else
 #define ADF7021_REG3_DMR         0x2A4C80D3
 #define ADF7021_REG3_YSF_L       0x2A4C80D3
 #define ADF7021_REG3_YSF_H       0x2A4CC093
 #define ADF7021_REG3_P25         0x2A4C80D3
 #define ADF7021_REG3_NXDN        0x2A4CC113
+#define ADF7021_REG3_M17         0x2A4C80D3	// XXX FIXME
 #endif
 #define ADF7021_REG3_POCSAG      0x2A4F0093
 
@@ -139,26 +142,31 @@ www.analog.com/media/en/technical-documentation/data-sheets/ADF7021.pdf
 #define ADF7021_REG10_YSF        0x01FE473A
 #define ADF7021_REG10_P25        0x01FE473A
 #define ADF7021_REG10_NXDN       0x01FE473A
+#define ADF7021_REG10_M17        0x01FE473A
 #if defined(ADF7021_AFC_POS)
 #define AFC_OFFSET_DMR           -250
 #define AFC_OFFSET_YSF           -250
 #define AFC_OFFSET_P25           -250
 #define AFC_OFFSET_NXDN          -250
+#define AFC_OFFSET_M17           -250
 #else
 #define AFC_OFFSET_DMR           250
 #define AFC_OFFSET_YSF           250
 #define AFC_OFFSET_P25           250
 #define AFC_OFFSET_NXDN          250
+#define AFC_OFFSET_M17           250
 #endif
 #else
 #define ADF7021_REG10_DMR        0x049E472A
 #define ADF7021_REG10_YSF        0x049E472A
 #define ADF7021_REG10_P25        0x049E472A
 #define ADF7021_REG10_NXDN       0x049E472A
+#define ADF7021_REG10_M17        0x049E472A
 #define AFC_OFFSET_DMR           0
 #define AFC_OFFSET_YSF           0
 #define AFC_OFFSET_P25           0
 #define AFC_OFFSET_NXDN          0
+#define AFC_OFFSET_M17           0
 #endif
 
 /****** Support for 12.2880 MHz TCXO ******/
@@ -198,12 +206,14 @@ www.analog.com/media/en/technical-documentation/data-sheets/ADF7021.pdf
 #define ADF7021_REG3_YSF_H       0x29EC0493
 #define ADF7021_REG3_P25         0x29EC0493
 #define ADF7021_REG3_NXDN        0x29EC0493
+#define ADF7021_REG3_M17         0x29EC0493
 #else
 #define ADF7021_REG3_DMR         0x29ECA093
 #define ADF7021_REG3_YSF_L       0x29ECA093
 #define ADF7021_REG3_YSF_H       0x29ECA093
 #define ADF7021_REG3_P25         0x29ECA093
 #define ADF7021_REG3_NXDN        0x29ECA113
+#define ADF7021_REG3_M17         0x29ECA093
 #endif
 #define ADF7021_REG3_POCSAG      0x29EE8093
 
@@ -240,26 +250,31 @@ www.analog.com/media/en/technical-documentation/data-sheets/ADF7021.pdf
 #define ADF7021_REG10_YSF        0x01FE557A
 #define ADF7021_REG10_P25        0x01FE557A
 #define ADF7021_REG10_NXDN       0x01FE557A
+#define ADF7021_REG10_M17        0x01FE557A
 #if defined(ADF7021_AFC_POS)
 #define AFC_OFFSET_DMR           -250
 #define AFC_OFFSET_YSF           -250
 #define AFC_OFFSET_P25           -250
 #define AFC_OFFSET_NXDN          -250
+#define AFC_OFFSET_M17           -250
 #else
 #define AFC_OFFSET_DMR           250
 #define AFC_OFFSET_YSF           250
 #define AFC_OFFSET_P25           250
 #define AFC_OFFSET_NXDN          250
+#define AFC_OFFSET_M17           250
 #endif
 #else
 #define ADF7021_REG10_DMR        0x049E556A
 #define ADF7021_REG10_YSF        0x049E556A
 #define ADF7021_REG10_P25        0x049E556A
 #define ADF7021_REG10_NXDN       0x049E556A
+#define ADF7021_REG10_M17        0x049E556A
 #define AFC_OFFSET_DMR           0
 #define AFC_OFFSET_YSF           0
 #define AFC_OFFSET_P25           0
 #define AFC_OFFSET_NXDN          0
+#define AFC_OFFSET_M17           0
 #endif
 
 #endif

Config.h

@@ -93,6 +93,9 @@
 // Use the YSF and P25 LEDs for NXDN
 // #define USE_ALTERNATE_NXDN_LEDS
 
+// Use the D-Star and P25 LEDs for M17
+// #define USE_ALTERNATE_M17_LEDS
+
 // Use the D-Star and DMR LEDs for POCSAG
 // #define USE_ALTERNATE_POCSAG_LEDS
 

Globals.h

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2016 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015,2016,2020 by Jonathan Naylor G4KLX
  *   Copyright (C) 2016,2017,2018,2019 by Andy Uribe CA6JAU
  *   Copyright (C) 2019 by Florian Wolters DF2ET
  *
@@ -42,6 +42,7 @@ enum MMDVM_STATE {
   STATE_P25       = 4,
   STATE_NXDN      = 5,
   STATE_POCSAG    = 6,
+  STATE_M17       = 7,
 
   // Dummy states start at 90
   STATE_DMRDMO1K  = 92,
@@ -77,6 +78,8 @@ const uint8_t  MARK_NONE  = 0x00U;
 #include "YSFTX.h"
 #include "P25RX.h"
 #include "P25TX.h"
+#include "M17RX.h"
+#include "M17TX.h"
 #include "NXDNRX.h"
 #include "NXDNTX.h"
 #include "POCSAGTX.h"
@@ -103,6 +106,7 @@ extern bool m_dmrEnable;
 extern bool m_ysfEnable;
 extern bool m_p25Enable;
 extern bool m_nxdnEnable;
+extern bool m_m17Enable;
 extern bool m_pocsagEnable;
 
 extern bool m_duplex;
@@ -133,6 +137,9 @@ extern CYSFTX ysfTX;
 extern CP25RX p25RX;
 extern CP25TX p25TX;
 
+extern CM17RX m17RX;
+extern CM17TX m17TX;
+
 extern CNXDNRX nxdnRX;
 extern CNXDNTX nxdnTX;
 

IO.cpp

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2016 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015,2016,2020 by Jonathan Naylor G4KLX
  *   Copyright (C) 2016,2017,2018 by Andy Uribe CA6JAU
  *   Copyright (C) 2017 by Danilo DB4PLE
 
@@ -51,6 +51,7 @@ m_int2counter(0U)
   YSF_pin(LOW);
   P25_pin(LOW);
   NXDN_pin(LOW);
+  M17_pin(LOW);
   POCSAG_pin(LOW);
   COS_pin(LOW);
   DEB_pin(LOW);
@@ -89,6 +90,7 @@ void CIO::selfTest()
       YSF_pin(ledValue);
       P25_pin(ledValue);
       NXDN_pin(ledValue);
+      M17_pin(ledValue);
       POCSAG_pin(ledValue);
       COS_pin(ledValue);
 
@@ -111,7 +113,7 @@ void CIO::process()
   if (m_started) {
     // Two seconds timeout
     if (m_watchdog >= 19200U) {
-      if (m_modemState == STATE_DSTAR || m_modemState == STATE_DMR || m_modemState == STATE_YSF || m_modemState == STATE_P25 || m_modemState == STATE_NXDN) {
+      if (m_modemState == STATE_DSTAR || m_modemState == STATE_DMR || m_modemState == STATE_YSF || m_modemState == STATE_P25 || m_modemState == STATE_NXDN || m_modemState == STATE_M17) {
         m_modemState = STATE_IDLE;
         setMode(m_modemState);
       }
@@ -178,6 +180,8 @@ void CIO::process()
     scantime = SCAN_TIME;
   else if(m_modemState_prev == STATE_NXDN)
     scantime = SCAN_TIME;
+  else if(m_modemState_prev == STATE_M17)
+    scantime = SCAN_TIME;
   else
     scantime = SCAN_TIME;
 
@@ -221,6 +225,9 @@ void CIO::process()
       case STATE_NXDN:
         nxdnRX.databit(bit);
         break;
+      case STATE_M17:
+        m17RX.databit(bit);
+        break;
       default:
         break;
     }
@@ -252,6 +259,10 @@ void CIO::start()
     m_Modes[m_TotalModes] = STATE_NXDN;
     m_TotalModes++;
   }
+  if(m_m17Enable) {
+    m_Modes[m_TotalModes] = STATE_M17;
+    m_TotalModes++;
+  }
 
 #if defined(ENABLE_SCAN_MODE)
   if(m_TotalModes > 1U)
@@ -412,6 +423,14 @@ void CIO::setMode(MMDVM_STATE modemState)
 #if defined(USE_ALTERNATE_NXDN_LEDS)
   }
 #endif
+#if defined(USE_ALTERNATE_M17_LEDS)
+  if (modemState != STATE_M17) {
+#endif
+    YSF_pin(modemState    == STATE_DSTAR);
+    P25_pin(modemState    == STATE_P25);
+#if defined(USE_ALTERNATE_M17_LEDS)
+  }
+#endif
 #if defined(USE_ALTERNATE_NXDN_LEDS)
   if (modemState != STATE_YSF && modemState != STATE_P25) {
 #endif
@@ -426,6 +445,13 @@ void CIO::setMode(MMDVM_STATE modemState)
 #if defined(USE_ALTERNATE_POCSAG_LEDS)
   }
 #endif
+#if defined(USE_ALTERNATE_M17_LEDS)
+  if (modemState != STATE_DSTAR && modemState != STATE_P25) {
+#endif
+    M17_pin(modemState   == STATE_M17);
+#if defined(USE_ALTERNATE_M17_LEDS)
+  }
+#endif
 }
 
 void CIO::setDecode(bool dcd)

IO.h

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2016 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015,2016,2020 by Jonathan Naylor G4KLX
  *   Copyright (C) 2016,2017,2018 by Andy Uribe CA6JAU
  *   Copyright (C) 2017 by Danilo DB4PLE
 
@@ -98,6 +98,7 @@ public:
   void      YSF_pin(bool on);
   void      P25_pin(bool on);
   void      NXDN_pin(bool on);
+  void      M17_pin(bool on);
   void      POCSAG_pin(bool on);
   void      COS_pin(bool on);
   void      interrupt(void);
@@ -141,7 +142,7 @@ public:
 #endif
   void      start(void);
   void      startInt(void);
-  void      setDeviations(uint8_t dstarTXLevel, uint8_t dmrTXLevel, uint8_t ysfTXLevel, uint8_t p25TXLevel, uint8_t nxdnTXLevel, uint8_t pocsagTXLevel, bool ysfLoDev);
+  void      setDeviations(uint8_t dstarTXLevel, uint8_t dmrTXLevel, uint8_t ysfTXLevel, uint8_t p25TXLevel, uint8_t nxdnTXLevel, uint8_t m17TXLevel, uint8_t pocsagTXLevel, bool ysfLoDev);
   void      updateCal(void);
 
 #if defined(SEND_RSSI_DATA)
@@ -162,6 +163,7 @@ public:
   uint16_t  devYSF(void);
   uint16_t  devP25(void);
   uint16_t  devNXDN(void);
+  uint16_t  devM17(void);
   uint16_t  devPOCSAG(void);
   void      printConf();
 #endif
@@ -181,7 +183,7 @@ private:
   uint32_t           m_scanPauseCnt;
   uint8_t            m_scanPos;
   uint8_t            m_TotalModes;
-  MMDVM_STATE        m_Modes[5];
+  MMDVM_STATE        m_Modes[6];
   bool               m_ledValue;
   volatile uint32_t  m_watchdog;
   volatile uint16_t  m_int1counter;

M17Defines.h

@@ -0,0 +1,47 @@
+/*
+ *   Copyright (C) 2016,2017,2018,2020 by Jonathan Naylor G4KLX
+ *
+ *   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.
+ */
+
+#if !defined(M17DEFINES_H)
+#define  M17DEFINES_H
+
+const unsigned int M17_RADIO_SYMBOL_LENGTH = 5U;      // At 24 kHz sample rate
+
+const unsigned int M17_FRAME_LENGTH_BITS    = 384U;
+const unsigned int M17_FRAME_LENGTH_BYTES   = M17_FRAME_LENGTH_BITS / 8U;
+const unsigned int M17_FRAME_LENGTH_SYMBOLS = M17_FRAME_LENGTH_BITS / 2U;
+const unsigned int M17_FRAME_LENGTH_SAMPLES = M17_FRAME_LENGTH_SYMBOLS * M17_RADIO_SYMBOL_LENGTH;
+
+const unsigned int M17_SYNC_LENGTH_BITS    = 16U;
+const unsigned int M17_SYNC_LENGTH_SYMBOLS = M17_SYNC_LENGTH_BITS / 2U;
+const unsigned int M17_SYNC_LENGTH_SAMPLES = M17_SYNC_LENGTH_SYMBOLS * M17_RADIO_SYMBOL_LENGTH;
+
+const uint8_t M17_SYNC_BYTES[]      = {0x32U, 0x43U};
+const uint8_t M17_SYNC_BYTES_LENGTH = 2U;
+
+const uint16_t M17_SYNC_BITS      = 0x3243U;
+
+// 3     2      4      3
+// 00 11 00 10  01 00  00 11
+// +1 -3 +1 -1  +3 +1  +1 -3
+
+const int8_t M17_SYNC_SYMBOLS_VALUES[] = {+1, -3, +1, -1, +3, +1, +1, -3};
+
+const uint8_t M17_SYNC_SYMBOLS = 0xAEU;
+
+#endif
+

M17RX.cpp

@@ -0,0 +1,137 @@
+/*
+ *   Copyright (C) 2009-2017,2018,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2016,2017,2018 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"
+#include "Globals.h"
+#include "M17RX.h"
+#include "Utils.h"
+
+const uint8_t MAX_SYNC_BIT_START_ERRS = 0U;
+const uint8_t MAX_SYNC_BIT_RUN_ERRS   = 2U;
+
+const unsigned int MAX_SYNC_FRAMES = 5U + 1U;
+
+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])
+
+CM17RX::CM17RX() :
+m_state(M17RXS_NONE),
+m_bitBuffer(0x00U),
+m_outBuffer(),
+m_buffer(NULL),
+m_bufferPtr(0U),
+m_lostCount(0U)
+{
+  m_buffer = m_outBuffer + 1U;
+}
+
+void CM17RX::reset()
+{
+  m_state     = M17RXS_NONE;
+  m_bitBuffer = 0x00U;
+  m_bufferPtr = 0U;
+  m_lostCount = 0U;
+}
+
+void CM17RX::databit(bool bit)
+{
+  if (m_state == M17RXS_NONE)
+    processNone(bit);
+  else
+    processData(bit);
+}
+
+void CM17RX::processNone(bool bit)
+{
+  m_bitBuffer <<= 1;
+  if (bit)
+    m_bitBuffer |= 0x01U;
+
+  // Fuzzy matching of the data sync bit sequence
+  if (countBits32(m_bitBuffer ^ M17_SYNC_BITS) <= MAX_SYNC_BIT_START_ERRS) {
+    DEBUG1("M17RX: sync found in None");
+    for (uint8_t i = 0U; i < M17_SYNC_BYTES_LENGTH; i++)
+      m_buffer[i] = M17_SYNC_BYTES[i];
+
+    m_lostCount = MAX_SYNC_FRAMES;
+    m_bufferPtr = M17_SYNC_LENGTH_BITS;
+    m_state     = M17RXS_DATA;
+
+    io.setDecode(true);
+  }
+
+}
+
+void CM17RX::processData(bool bit)
+{
+  m_bitBuffer <<= 1;
+  if (bit)
+    m_bitBuffer |= 0x01U;
+
+  WRITE_BIT1(m_buffer, m_bufferPtr, bit);
+
+  m_bufferPtr++;
+  if (m_bufferPtr > M17_FRAME_LENGTH_BITS)
+    reset();
+
+  // Only search for a sync in the right place +-2 symbols
+  if (m_bufferPtr >= (M17_SYNC_LENGTH_BITS - 2U) && m_bufferPtr <= (M17_SYNC_LENGTH_BITS + 2U)) {
+    // Fuzzy matching of the data sync bit sequence
+    if (countBits32(m_bitBuffer ^ M17_SYNC_BITS) <= MAX_SYNC_BIT_RUN_ERRS) {
+      DEBUG2("M17RX: found sync in Data, pos", m_bufferPtr - M17_SYNC_LENGTH_BITS);
+      m_lostCount = MAX_SYNC_FRAMES;
+      m_bufferPtr = M17_SYNC_LENGTH_BITS;
+    }
+  }
+
+  // Send a data frame to the host if the required number of bits have been received
+  if (m_bufferPtr == M17_FRAME_LENGTH_BITS) {
+    // We've not seen a data sync for too long, signal RXLOST and change to RX_NONE
+    m_lostCount--;
+    if (m_lostCount == 0U) {
+      DEBUG1("M17RX: sync timed out, lost lock");
+      io.setDecode(false);
+      serial.writeM17Lost();
+      reset();
+    } else {
+      // Write data to host
+      m_outBuffer[0U] = m_lostCount == (MAX_SYNC_FRAMES - 1U) ? 0x01U : 0x00U;
+      writeRSSIData(m_outBuffer);
+
+      // Start the next frame
+      ::memset(m_outBuffer, 0x00U, M17_FRAME_LENGTH_BYTES + 3U);
+      m_bufferPtr = 0U;
+    }
+  }
+}
+
+void CM17RX::writeRSSIData(uint8_t* data)
+{
+#if defined(SEND_RSSI_DATA)
+  uint16_t rssi = io.readRSSI();
+
+  data[49U] = (rssi >> 8) & 0xFFU;
+  data[50U] = (rssi >> 0) & 0xFFU;
+
+  serial.writeM17Data(data, M17_FRAME_LENGTH_BYTES + 3U);
+#else
+  serial.writeM17Data(data, M17_FRAME_LENGTH_BYTES + 1U);
+#endif
+}

M17RX.h

@@ -0,0 +1,51 @@
+/*
+ *   Copyright (C) 2015,2016,2017,2018,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2016,2017,2018 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.
+ */
+
+#if !defined(M17RX_H)
+#define  M17RX_H
+
+#include "M17Defines.h"
+
+enum M17RX_STATE {
+  M17RXS_NONE,
+  M17RXS_DATA
+};
+
+class CM17RX {
+public:
+  CM17RX();
+
+  void databit(bool bit);
+
+  void reset();
+
+private:
+  M17RX_STATE m_state;
+  uint32_t    m_bitBuffer;
+  uint8_t     m_outBuffer[M17_FRAME_LENGTH_BYTES + 3U];
+  uint8_t*    m_buffer;
+  uint16_t    m_bufferPtr;
+  uint16_t    m_lostCount;
+
+  void processNone(bool bit);
+  void processData(bool bit);
+  void writeRSSIData(uint8_t* data);
+};
+
+#endif

M17TX.cpp

@@ -0,0 +1,124 @@
+/*
+ *   Copyright (C) 2009-2018,2020 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
+ *   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"
+#include "Globals.h"
+#include "M17TX.h"
+
+#include "M17Defines.h"
+
+const uint8_t M17_SYNC = 0x77U;
+const uint8_t M17_PREAMBLE = 0x77U;
+
+CM17TX::CM17TX() :
+m_buffer(1500U),
+m_poBuffer(),
+m_poLen(0U),
+m_poPtr(0U),
+m_txDelay(240U),      // 200ms
+m_delay(false)
+{
+}
+
+void CM17TX::process()
+{
+  if (m_buffer.getData() == 0U && m_poLen == 0U)
+    return;
+
+  if (m_poLen == 0U) {
+    if (!m_tx) {
+      m_delay = true;
+      m_poLen = m_txDelay;
+    } else {
+      m_delay = false;
+      for (uint8_t i = 0U; i < M17_FRAME_LENGTH_BYTES; i++)
+        m_poBuffer[m_poLen++] = m_buffer.get();
+    }
+
+    m_poPtr = 0U;
+  }
+
+  if (m_poLen > 0U) {
+    uint16_t space = io.getSpace();
+    
+    while (space > 8U) {
+      if (m_delay) {
+        writeByte(M17_SYNC);
+        m_poPtr++;
+      } else
+        writeByte(m_poBuffer[m_poPtr++]); 
+
+      space -= 8U;
+      
+      if (m_poPtr >= m_poLen) {
+        if (m_delay) {
+          m_delay = false;
+          m_poPtr = 0U;
+          m_poLen = 3U;
+        } else {
+          m_poPtr = 0U;
+          m_poLen = 0U;
+          m_delay = false;
+          return;
+        }
+      }
+    }
+  }
+}
+
+uint8_t CM17TX::writeData(const uint8_t* data, uint8_t length)
+{
+  if (length != (M17_FRAME_LENGTH_BYTES + 1U))
+    return 4U;
+
+  uint16_t space = m_buffer.getSpace();
+  if (space < M17_FRAME_LENGTH_BYTES)
+    return 5U;
+
+  for (uint8_t i = 0U; i < M17_FRAME_LENGTH_BYTES; i++)
+    m_buffer.put(data[i + 1U]);
+
+  return 0U;
+}
+
+void CM17TX::writeByte(uint8_t c)
+{
+  uint8_t bit;
+  uint8_t mask = 0x80U;
+  
+  for (uint8_t i = 0U; i < 8U; i++, c <<= 1) {
+    if ((c & mask) == mask)
+      bit = 1U;
+    else
+      bit = 0U;
+
+    io.write(&bit, 1);
+  }
+}
+
+void CM17TX::setTXDelay(uint8_t delay)
+{
+  m_txDelay = 600U + uint16_t(delay) * 12U;        // 500ms + tx delay
+}
+
+uint8_t CM17TX::getSpace() const
+{
+  return m_buffer.getSpace() / M17_FRAME_LENGTH_BYTES;
+}
+

M17TX.h

@@ -0,0 +1,50 @@
+/*
+ *   Copyright (C) 2015,2016,2017,2020 by Jonathan Naylor G4KLX
+ *
+ *   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.
+ */
+
+#if !defined(M17TX_H)
+#define  M17TX_H
+
+#include "Config.h"
+
+#include "SerialRB.h"
+
+class CM17TX {
+public:
+  CM17TX();
+
+  uint8_t writeData(const uint8_t* data, uint8_t length);
+
+  void process();
+
+  void setTXDelay(uint8_t delay);
+
+  uint8_t getSpace() const;
+
+private:
+  CSerialRB m_buffer;
+  uint8_t   m_poBuffer[1200U];
+  uint16_t  m_poLen;
+  uint16_t  m_poPtr;
+  uint16_t  m_txDelay;
+  bool      m_delay;
+
+  void writeByte(uint8_t c);
+};
+
+#endif
+

MMDVM_HS.cpp

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2016 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015,2016,2020 by Jonathan Naylor G4KLX
  *   Copyright (C) 2016 by Mathis Schmieder DB9MAT
  *   Copyright (C) 2016 by Colin Durbridge G4EML
  *   Copyright (C) 2016,2017,2018,2019 by Andy Uribe CA6JAU
@@ -43,6 +43,7 @@ bool m_dmrEnable    = true;
 bool m_ysfEnable    = true;
 bool m_p25Enable    = true;
 bool m_nxdnEnable   = true;
+bool m_m17Enable    = true;
 bool m_pocsagEnable = true;
 
 bool m_duplex = false;
@@ -70,6 +71,9 @@ CYSFTX     ysfTX;
 CP25RX     p25RX;
 CP25TX     p25TX;
 
+CM17RX     m17RX;
+CM17TX     m17TX;
+
 CNXDNRX    nxdnRX;
 CNXDNTX    nxdnTX;
 
@@ -125,6 +129,9 @@ void loop()
   if (m_nxdnEnable && m_modemState == STATE_NXDN)
     nxdnTX.process();
 
+  if (m_m17Enable && m_modemState == STATE_M17)
+    m17TX.process();
+
   if (m_pocsagEnable && (m_modemState == STATE_POCSAG || pocsagTX.busy()))
     pocsagTX.process();
 

MMDVM_HS.ino

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2016 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015,2016,2020 by Jonathan Naylor G4KLX
  *   Copyright (C) 2016 by Colin Durbridge G4EML
  *   Copyright (C) 2016,2017 by Andy Uribe CA6JAU
  *
@@ -38,6 +38,7 @@ bool m_dmrEnable    = true;
 bool m_ysfEnable    = true;
 bool m_p25Enable    = true;
 bool m_nxdnEnable   = true;
+bool m_m17Enable    = true;
 bool m_pocsagEnable = true;
 
 bool m_duplex = false;
@@ -65,6 +66,9 @@ CYSFTX     ysfTX;
 CP25RX     p25RX;
 CP25TX     p25TX;
 
+CM17RX     m17RX;
+CM17TX     m17TX;
+
 CNXDNRX    nxdnRX;
 CNXDNTX    nxdnTX;
 
@@ -115,6 +119,9 @@ void loop()
   if (m_nxdnEnable && m_modemState == STATE_NXDN)
     nxdnTX.process();
 
+  if (m_m17Enable && m_modemState == STATE_M17)
+    m17TX.process();
+
   if (m_pocsagEnable && (m_modemState == STATE_POCSAG || pocsagTX.busy()))
     pocsagTX.process();
 

SerialPort.cpp

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2013,2015,2016,2018 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2013,2015,2016,2018,2020 by Jonathan Naylor G4KLX
  *   Copyright (C) 2016 by Colin Durbridge G4EML
  *   Copyright (C) 2016,2017,2018,2019 by Andy Uribe CA6JAU
  *   Copyright (C) 2019 by Florian Wolters DF2ET
@@ -60,6 +60,9 @@ const uint8_t MMDVM_P25_LOST     = 0x32U;
 const uint8_t MMDVM_NXDN_DATA    = 0x40U;
 const uint8_t MMDVM_NXDN_LOST    = 0x41U;
 
+const uint8_t MMDVM_M17_DATA     = 0x45U;
+const uint8_t MMDVM_M17_LOST     = 0x46U;
+
 const uint8_t MMDVM_POCSAG_DATA  = 0x50U;
 
 const uint8_t MMDVM_ACK          = 0x70U;
@@ -126,7 +129,7 @@ void CSerialPort::getStatus()
 
   // Send all sorts of interesting internal values
   reply[0U]  = MMDVM_FRAME_START;
-  reply[1U]  = 13U;
+  reply[1U]  = 14U;
   reply[2U]  = MMDVM_GET_STATUS;
 
   reply[3U]  = 0x00U;
@@ -142,6 +145,8 @@ void CSerialPort::getStatus()
     reply[3U] |= 0x10U;
   if (m_pocsagEnable)
     reply[3U] |= 0x20U;
+  if (m_m17Enable)
+    reply[3U] |= 0x80U;
 
   reply[4U]  = uint8_t(m_modemState);
 
@@ -196,7 +201,12 @@ void CSerialPort::getStatus()
   else
     reply[12U] = 0U;
 
-  writeInt(1U, reply, 13);
+  if (m_m17Enable)
+    reply[13U] = m17TX.getSpace();
+  else
+    reply[13U] = 0U;
+
+  writeInt(1U, reply, 14);
 }
 
 void CSerialPort::getVersion()
@@ -226,7 +236,7 @@ void CSerialPort::getVersion()
 
 uint8_t CSerialPort::setConfig(const uint8_t* data, uint8_t length)
 {
-  if (length < 13U)
+  if (length < 23U)
     return 4U;
 
   bool ysfLoDev  = (data[0U] & 0x08U) == 0x08U;
@@ -240,6 +250,7 @@ uint8_t CSerialPort::setConfig(const uint8_t* data, uint8_t length)
   bool p25Enable    = (data[1U] & 0x08U) == 0x08U;
   bool nxdnEnable   = (data[1U] & 0x10U) == 0x10U;
   bool pocsagEnable = (data[1U] & 0x20U) == 0x20U;
+  bool m17Enable    = (data[1U] & 0x80U) == 0x80U;
 
   uint8_t txDelay = data[2U];
   if (txDelay > 50U)
@@ -247,7 +258,7 @@ uint8_t CSerialPort::setConfig(const uint8_t* data, uint8_t length)
 
   MMDVM_STATE modemState = MMDVM_STATE(data[3U]);
 
-  if (modemState != STATE_IDLE && modemState != STATE_DSTAR && modemState != STATE_DMR && modemState != STATE_YSF && modemState != STATE_P25 && modemState != STATE_NXDN && modemState != STATE_POCSAG && modemState != STATE_DSTARCAL && modemState != STATE_DMRCAL && modemState != STATE_DMRDMO1K && modemState != STATE_INTCAL && modemState != STATE_RSSICAL && modemState != STATE_POCSAGCAL)
+  if (modemState != STATE_IDLE && modemState != STATE_DSTAR && modemState != STATE_DMR && modemState != STATE_YSF && modemState != STATE_P25 && modemState != STATE_NXDN && modemState != STATE_M17 && modemState != STATE_POCSAG && modemState != STATE_DSTARCAL && modemState != STATE_DMRCAL && modemState != STATE_DMRDMO1K && modemState != STATE_INTCAL && modemState != STATE_RSSICAL && modemState != STATE_POCSAGCAL)
     return 4U;
   if (modemState == STATE_DSTAR && !dstarEnable)
     return 4U;
@@ -261,6 +272,8 @@ uint8_t CSerialPort::setConfig(const uint8_t* data, uint8_t length)
     return 4U;
   if (modemState == STATE_POCSAG && !pocsagEnable)
     return 4U;
+  if (modemState == STATE_M17 && !m17Enable)
+    return 4U;
 
   uint8_t colorCode = data[6U];
   if (colorCode > 15U)
@@ -276,22 +289,18 @@ uint8_t CSerialPort::setConfig(const uint8_t* data, uint8_t length)
   uint8_t dmrTXLevel    = data[10U];
   uint8_t ysfTXLevel    = data[11U];
   uint8_t p25TXLevel    = data[12U];
-  uint8_t nxdnTXLevel   = 128U;
+  uint8_t nxdnTXLevel   = data[15U];
-  uint8_t pocsagTXLevel = 128U;
+  uint8_t pocsagTXLevel = data[17U];
+  uint8_t m17TXLevel    = data[21U];
 
-  if (length >= 16U)
+  io.setDeviations(dstarTXLevel, dmrTXLevel, ysfTXLevel, p25TXLevel, nxdnTXLevel, m17TXLevel, pocsagTXLevel, ysfLoDev);
-    nxdnTXLevel = data[15U];
-
-  if (length >= 18U)
-    pocsagTXLevel = data[17U];
-
-  io.setDeviations(dstarTXLevel, dmrTXLevel, ysfTXLevel, p25TXLevel, nxdnTXLevel, pocsagTXLevel, ysfLoDev);
 
   m_dstarEnable  = dstarEnable;
   m_dmrEnable    = dmrEnable;
   m_ysfEnable    = ysfEnable;
   m_p25Enable    = p25Enable;
   m_nxdnEnable   = nxdnEnable;
+  m_m17Enable    = m17Enable;
   m_pocsagEnable = pocsagEnable;
 
   if (modemState == STATE_DMRCAL || modemState == STATE_DMRDMO1K || modemState == STATE_RSSICAL || modemState == STATE_INTCAL) {
@@ -332,6 +341,7 @@ uint8_t CSerialPort::setConfig(const uint8_t* data, uint8_t length)
   ysfTX.setTXDelay(txDelay);
   p25TX.setTXDelay(txDelay);
   nxdnTX.setTXDelay(txDelay);
+  m17TX.setTXDelay(txDelay);
   pocsagTX.setTXDelay(txDelay);
   dmrDMOTX.setTXDelay(txDelay);
 
@@ -357,6 +367,8 @@ uint8_t CSerialPort::setConfig(const uint8_t* data, uint8_t length)
       io.ifConf(STATE_P25, true);
     else if(m_nxdnEnable)
       io.ifConf(STATE_NXDN, true);
+    else if(m_m17Enable)
+      io.ifConf(STATE_M17, true);
     else if(m_pocsagEnable)
       io.ifConf(STATE_POCSAG, true);
   }
@@ -383,7 +395,7 @@ uint8_t CSerialPort::setMode(const uint8_t* data, uint8_t length)
   if (modemState == m_modemState)
     return 0U;
 
-  if (modemState != STATE_IDLE && modemState != STATE_DSTAR && modemState != STATE_DMR && modemState != STATE_YSF && modemState != STATE_P25 && modemState != STATE_NXDN && modemState != STATE_POCSAG && modemState != STATE_DSTARCAL && modemState != STATE_DMRCAL && modemState != STATE_DMRDMO1K && modemState != STATE_RSSICAL && modemState != STATE_INTCAL && modemState != STATE_POCSAGCAL)
+  if (modemState != STATE_IDLE && modemState != STATE_DSTAR && modemState != STATE_DMR && modemState != STATE_YSF && modemState != STATE_P25 && modemState != STATE_NXDN && modemState != STATE_M17 && modemState != STATE_POCSAG && modemState != STATE_DSTARCAL && modemState != STATE_DMRCAL && modemState != STATE_DMRDMO1K && modemState != STATE_RSSICAL && modemState != STATE_INTCAL && modemState != STATE_POCSAGCAL)
     return 4U;
   if (modemState == STATE_DSTAR && !m_dstarEnable)
     return 4U;
@@ -395,6 +407,8 @@ uint8_t CSerialPort::setMode(const uint8_t* data, uint8_t length)
     return 4U;
   if (modemState == STATE_NXDN && !m_nxdnEnable)
     return 4U;
+  if (modemState == STATE_M17 && !m_m17Enable)
+    return 4U;
   if (modemState == STATE_POCSAG && !m_pocsagEnable)
     return 4U;
 
@@ -469,6 +483,7 @@ void CSerialPort::setMode(MMDVM_STATE modemState)
       ysfRX.reset();
       p25RX.reset();
       nxdnRX.reset();
+      m17RX.reset();
       cwIdTX.reset();
       break;
     case STATE_DSTAR:
@@ -481,6 +496,7 @@ void CSerialPort::setMode(MMDVM_STATE modemState)
       ysfRX.reset();
       p25RX.reset();
       nxdnRX.reset();
+      m17RX.reset();
       cwIdTX.reset();
       break;
     case STATE_YSF:
@@ -493,6 +509,7 @@ void CSerialPort::setMode(MMDVM_STATE modemState)
       dstarRX.reset();
       p25RX.reset();
       nxdnRX.reset();
+      m17RX.reset();
       cwIdTX.reset();
       break;
     case STATE_P25:
@@ -505,6 +522,7 @@ void CSerialPort::setMode(MMDVM_STATE modemState)
       dstarRX.reset();
       ysfRX.reset();
       nxdnRX.reset();
+      m17RX.reset();
       cwIdTX.reset();
       break;
     case STATE_NXDN:
@@ -517,6 +535,20 @@ void CSerialPort::setMode(MMDVM_STATE modemState)
       dstarRX.reset();
       ysfRX.reset();
       p25RX.reset();
+      m17RX.reset();
+      cwIdTX.reset();
+      break;
+    case STATE_M17:
+      DEBUG1("Mode set to M17");
+#if defined(DUPLEX)
+      dmrIdleRX.reset();
+      dmrRX.reset();
+#endif
+      dmrDMORX.reset();
+      dstarRX.reset();
+      ysfRX.reset();
+      p25RX.reset();
+      nxdnRX.reset();
       cwIdTX.reset();
       break;
     case STATE_POCSAG:
@@ -530,6 +562,7 @@ void CSerialPort::setMode(MMDVM_STATE modemState)
       ysfRX.reset();
       p25RX.reset();
       nxdnRX.reset();
+      m17RX.reset();
       cwIdTX.reset();
       break;
     default:
@@ -831,6 +864,20 @@ void CSerialPort::process()
             }
             break;
 
+          case MMDVM_M17_DATA:
+            if (m_m17Enable) {
+              if (m_modemState == STATE_IDLE || m_modemState == STATE_M17)
+                err = m17TX.writeData(m_buffer + 3U, m_len - 3U);
+            }
+            if (err == 0U) {
+              if (m_modemState == STATE_IDLE)
+                setMode(STATE_M17);
+            } else {
+              DEBUG2("Received invalid M17 data", err);
+              sendNAK(err);
+            }
+            break;
+
           case MMDVM_POCSAG_DATA:
             if (m_pocsagEnable) {
               if (m_modemState == STATE_IDLE || m_modemState == STATE_POCSAG) {
@@ -1186,6 +1233,46 @@ void CSerialPort::writeNXDNLost()
   writeInt(1U, reply, 3);
 }
 
+void CSerialPort::writeM17Data(const uint8_t* data, uint8_t length)
+{
+  if (m_modemState != STATE_M17 && m_modemState != STATE_IDLE)
+    return;
+
+  if (!m_m17Enable)
+    return;
+
+  uint8_t reply[130U];
+
+  reply[0U] = MMDVM_FRAME_START;
+  reply[1U] = 0U;
+  reply[2U] = MMDVM_M17_DATA;
+
+  uint8_t count = 3U;
+  for (uint8_t i = 0U; i < length; i++, count++)
+    reply[count] = data[i];
+
+  reply[1U] = count;
+
+  writeInt(1U, reply, count);
+}
+
+void CSerialPort::writeM17Lost()
+{
+  if (m_modemState != STATE_M17 && m_modemState != STATE_IDLE)
+    return;
+
+  if (!m_m17Enable)
+    return;
+
+  uint8_t reply[3U];
+
+  reply[0U] = MMDVM_FRAME_START;
+  reply[1U] = 3U;
+  reply[2U] = MMDVM_M17_LOST;
+
+  writeInt(1U, reply, 3);
+}
+
 #if defined(SEND_RSSI_DATA)
 
 void CSerialPort::writeRSSIData(const uint8_t* data, uint8_t length)

SerialPort.h

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2016,2018 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015,2016,2018,2020 by Jonathan Naylor G4KLX
  *   Copyright (C) 2018 by Andy Uribe CA6JAU
  *
  *   This program is free software; you can redistribute it and/or modify
@@ -52,6 +52,9 @@ public:
   void writeNXDNData(const uint8_t* data, uint8_t length);
   void writeNXDNLost();
 
+  void writeM17Data(const uint8_t* data, uint8_t length);
+  void writeM17Lost();
+
 #if defined(SEND_RSSI_DATA)
   void writeRSSIData(const uint8_t* data, uint8_t length);
 #endif

configs/D2RG_MMDVM_HS.h

@@ -93,6 +93,9 @@
 // Use the YSF and P25 LEDs for NXDN
 // #define USE_ALTERNATE_NXDN_LEDS
 
+// Use the D-Star and P25 LEDs for M17
+// #define USE_ALTERNATE_M17_LEDS
+
 // Use the D-Star and DMR LEDs for POCSAG
 // #define USE_ALTERNATE_POCSAG_LEDS
 

configs/MMDVM_HS_Dual_Hat-12mhz.h

@@ -93,6 +93,9 @@
 // Use the YSF and P25 LEDs for NXDN
 // #define USE_ALTERNATE_NXDN_LEDS
 
+// Use the D-Star and P25 LEDs for M17
+// #define USE_ALTERNATE_M17_LEDS
+
 // Use the D-Star and DMR LEDs for POCSAG
 #define USE_ALTERNATE_POCSAG_LEDS
 

configs/MMDVM_HS_Dual_Hat.h

@@ -93,6 +93,9 @@
 // Use the YSF and P25 LEDs for NXDN
 // #define USE_ALTERNATE_NXDN_LEDS
 
+// Use the D-Star and P25 LEDs for M17
+// #define USE_ALTERNATE_M17_LEDS
+
 // Use the D-Star and DMR LEDs for POCSAG
 #define USE_ALTERNATE_POCSAG_LEDS
 

configs/MMDVM_HS_Hat-12mhz.h

@@ -93,6 +93,9 @@
 // Use the YSF and P25 LEDs for NXDN
 // #define USE_ALTERNATE_NXDN_LEDS
 
+// Use the D-Star and P25 LEDs for M17
+// #define USE_ALTERNATE_M17_LEDS
+
 // Use the D-Star and DMR LEDs for POCSAG
 #define USE_ALTERNATE_POCSAG_LEDS
 

configs/MMDVM_HS_Hat.h

@@ -93,6 +93,9 @@
 // Use the YSF and P25 LEDs for NXDN
 // #define USE_ALTERNATE_NXDN_LEDS
 
+// Use the D-Star and P25 LEDs for M17
+// #define USE_ALTERNATE_M17_LEDS
+
 // Use the D-Star and DMR LEDs for POCSAG
 #define USE_ALTERNATE_POCSAG_LEDS
 

configs/NanoDV_NPI.h

@@ -93,6 +93,9 @@
 // Use the YSF and P25 LEDs for NXDN
 // #define USE_ALTERNATE_NXDN_LEDS
 
+// Use the D-Star and P25 LEDs for M17
+// #define USE_ALTERNATE_M17_LEDS
+
 // Use the D-Star and DMR LEDs for POCSAG
 // #define USE_ALTERNATE_POCSAG_LEDS
 

configs/NanoDV_USB.h

@@ -93,6 +93,9 @@
 // Use the YSF and P25 LEDs for NXDN
 // #define USE_ALTERNATE_NXDN_LEDS
 
+// Use the D-Star and P25 LEDs for M17
+// #define USE_ALTERNATE_M17_LEDS
+
 // Use the D-Star and DMR LEDs for POCSAG
 // #define USE_ALTERNATE_POCSAG_LEDS
 

configs/Nano_hotSPOT.h

@@ -93,6 +93,9 @@
 // Use the YSF and P25 LEDs for NXDN
 // #define USE_ALTERNATE_NXDN_LEDS
 
+// Use the D-Star and P25 LEDs for M17
+// #define USE_ALTERNATE_M17_LEDS
+
 // Use the D-Star and DMR LEDs for POCSAG
 // #define USE_ALTERNATE_POCSAG_LEDS
 

configs/ZUMspot_Libre.h

@@ -93,6 +93,9 @@
 // Use the YSF and P25 LEDs for NXDN
 // #define USE_ALTERNATE_NXDN_LEDS
 
+// Use the D-Star and P25 LEDs for M17
+// #define USE_ALTERNATE_M17_LEDS
+
 // Use the D-Star and DMR LEDs for POCSAG
 // #define USE_ALTERNATE_POCSAG_LEDS
 

configs/ZUMspot_RPi.h

@@ -93,6 +93,9 @@
 // Use the YSF and P25 LEDs for NXDN
 // #define USE_ALTERNATE_NXDN_LEDS
 
+// Use the D-Star and P25 LEDs for M17
+// #define USE_ALTERNATE_M17_LEDS
+
 // Use the D-Star and DMR LEDs for POCSAG
 // #define USE_ALTERNATE_POCSAG_LEDS
 

configs/ZUMspot_USB.h

@@ -92,6 +92,9 @@
 // Use the YSF and P25 LEDs for NXDN
 // #define USE_ALTERNATE_NXDN_LEDS
 
+// Use the D-Star and P25 LEDs for M17
+// #define USE_ALTERNATE_M17_LEDS
+
 // Use the D-Star and DMR LEDs for POCSAG
 // #define USE_ALTERNATE_POCSAG_LEDS
 

configs/ZUMspot_dualband.h

@@ -91,6 +91,9 @@
 // Use the YSF and P25 LEDs for NXDN
 // #define USE_ALTERNATE_NXDN_LEDS
 
+// Use the D-Star and P25 LEDs for M17
+// #define USE_ALTERNATE_M17_LEDS
+
 // Use the D-Star and DMR LEDs for POCSAG
 // #define USE_ALTERNATE_POCSAG_LEDS
 

configs/ZUMspot_duplex.h

@@ -93,6 +93,9 @@
 // Use the YSF and P25 LEDs for NXDN
 // #define USE_ALTERNATE_NXDN_LEDS
 
+// Use the D-Star and P25 LEDs for M17
+// #define USE_ALTERNATE_M17_LEDS
+
 // Use the D-Star and DMR LEDs for POCSAG
 // #define USE_ALTERNATE_POCSAG_LEDS
 

configs/generic_duplex_gpio.h

@@ -93,6 +93,9 @@
 // Use the YSF and P25 LEDs for NXDN
 // #define USE_ALTERNATE_NXDN_LEDS
 
+// Use the D-Star and P25 LEDs for M17
+// #define USE_ALTERNATE_M17_LEDS
+
 // Use the D-Star and DMR LEDs for POCSAG
 // #define USE_ALTERNATE_POCSAG_LEDS
 

configs/generic_duplex_usb.h

@@ -93,6 +93,9 @@
 // Use the YSF and P25 LEDs for NXDN
 // #define USE_ALTERNATE_NXDN_LEDS
 
+// Use the D-Star and P25 LEDs for M17
+// #define USE_ALTERNATE_M17_LEDS
+
 // Use the D-Star and DMR LEDs for POCSAG
 // #define USE_ALTERNATE_POCSAG_LEDS
 

configs/generic_gpio.h

@@ -93,6 +93,9 @@
 // Use the YSF and P25 LEDs for NXDN
 // #define USE_ALTERNATE_NXDN_LEDS
 
+// Use the D-Star and P25 LEDs for M17
+// #define USE_ALTERNATE_M17_LEDS
+
 // Use the D-Star and DMR LEDs for POCSAG
 // #define USE_ALTERNATE_POCSAG_LEDS
 

version.h

@@ -25,7 +25,7 @@
 #define VER_MAJOR       "1"
 #define VER_MINOR       "5"
 #define VER_REV         "1b"
-#define VERSION_DATE    "20191201"
+#define VERSION_DATE    "20201023"
 
 #if defined(ZUMSPOT_ADF7021)
 #define BOARD_INFO      "ZUMspot"