Add basics for a POCSAG Cal mode

CalPOCSAG.cpp

@@ -0,0 +1,66 @@
+/*
+ *   Copyright (C) 2018 by Florian Wolters DF2ET
+ *
+ *   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 "CalPOCSAG.h"
+
+// POCSAG 600 Hz Test Pattern
+
+CCalPOCSAG::CCalPOCSAG() :
+m_transmit(false),
+m_state(POCSAGCAL_IDLE),
+m_audioSeq(0U)
+{
+}
+
+void CCalPOCSAG::process()
+{
+  pocsagTX.process();
+
+  uint16_t space = pocsagTX.getSpace();
+  if (space < 1U)
+    return;
+
+  switch (m_state) {
+    case POCSAGCAL_TX:
+      //pocsagTX.writeData(POCSAG_CAL[m_audioSeq], POCSAG_FRAME_LENGTH_BYTES + 1U);
+      m_audioSeq = (m_audioSeq + 1U) % 4U;
+      if(!m_transmit)
+        m_state = POCSAGCAL_IDLE;
+      break;
+    default:
+        m_state = POCSAGCAL_IDLE;
+        m_audioSeq = 0U;
+      break;
+  }
+}
+
+uint8_t CCalPOCSAG::write(const uint8_t* data, uint8_t length)
+{
+  if (length != 1U)
+    return 4U;
+
+  m_transmit = data[0U] == 1U;
+
+  if(m_transmit && m_state == POCSAGCAL_IDLE)
+    m_state = POCSAGCAL_TX;
+
+  return 0U;
+}
+