Maintain monitor state when up/down freq/chan

am_fix.c

@@ -297,7 +297,7 @@ const uint8_t orig_pga       = 6;   //  -3dB
 #endif
 
 	unsigned int counter = 0;
-	
+
 	int16_t orig_dB_gain = -17;
 
 	#ifdef ENABLE_AM_FIX_TEST1
@@ -321,8 +321,14 @@ const uint8_t orig_pga       = 6;   //  -3dB
 	// used to limit the max front end gain
 	unsigned int max_index = ARRAY_SIZE(am_fix_gain_table) - 1;
 	
+	#ifndef ENABLE_AM_FIX_TEST1
+		// -89dBm, any higher and the AM demodulator starts to saturate/clip/distort
+		const int16_t desired_rssi = (-89 + 160) * 2;
+	#endif
+	
 	void AM_fix_init(void)
-	{
+	{	// called at boot-up
+	
 /*		unsigned int i;
 		for (i = 0; i < 2; i++)
 		{
@@ -359,6 +365,8 @@ const uint8_t orig_pga       = 6;   //  -3dB
 	void AM_fix_reset(const int vfo)
 	{	// reset the AM fixer
 
+		counter = 0;
+		
 		prev_rssi[vfo] = 0;
 
 		am_gain_hold_counter[vfo] = 0;
@@ -372,8 +380,6 @@ const uint8_t orig_pga       = 6;   //  -3dB
 		#endif
 
 		am_fix_gain_table_index_prev[vfo] = 0;
-		
-//		AM_fix_init();  // bootup calls this
 	}
 
 	// adjust the RX RF gain to try and prevent the AM demodulator from
@@ -388,13 +394,6 @@ const uint8_t orig_pga       = 6;   //  -3dB
 		int16_t diff_dB;
 		int16_t rssi;
 
-		#ifndef ENABLE_AM_FIX_TEST1
-			// -89dBm, any higher and the AM demodulator starts to saturate/clip/distort
-			const int16_t desired_rssi = (-89 + 160) * 2;   // dBm to ADC sample
-		#endif
-
-		counter++;
-		
 		// but we're not in FM mode, we're in AM mode
 
 		switch (gCurrentFunction)
@@ -402,6 +401,7 @@ const uint8_t orig_pga       = 6;   //  -3dB
 			case FUNCTION_TRANSMIT:
 			case FUNCTION_BAND_SCOPE:
 			case FUNCTION_POWER_SAVE:
+				counter = 0;
 				return;
 
 			case FUNCTION_FOREGROUND:
@@ -414,6 +414,10 @@ const uint8_t orig_pga       = 6;   //  -3dB
 				break;
 		}
 
+		if (counter > 0)
+			if (++counter >= 20)    // limit display update rate to 200ms
+				counter = 0;
+		
 		{	// sample the current RSSI level
 			// average it with the previous rssi (a bit of noise/spike immunity)
 			const int16_t new_rssi = BK4819_GetRSSI();
@@ -427,7 +431,11 @@ const uint8_t orig_pga       = 6;   //  -3dB
 			if (gCurrentRSSI[vfo] != new_rssi)
 			{
 				gCurrentRSSI[vfo] = new_rssi;
-				gUpdateDisplay    = ((counter & 15u) == 0);  // limit the screen update rate to once every 150ms
+				if (counter == 0)
+				{
+					counter        = 1;
+					gUpdateDisplay = true;
+				}
 			}
 		}
 		
@@ -545,13 +553,21 @@ const uint8_t orig_pga       = 6;   //  -3dB
 				if (gCurrentRSSI[vfo] != new_rssi)
 				{
 					gCurrentRSSI[vfo] = new_rssi;
-					gUpdateDisplay    = ((counter & 15u) == 0);  // limit the screen update rate to once every 150ms
+					if (counter == 0)
+					{
+						counter        = 1;
+						gUpdateDisplay = true;
+					}
 				}
 			}
 		}
 
 		#ifdef ENABLE_AM_FIX_SHOW_DATA
-			gUpdateDisplay = ((counter & 15u) == 0);  // limit the screen update rate to once every 150ms
+			if (counter == 0)
+			{
+				counter        = 1;
+				gUpdateDisplay = true;
+			}
 		#endif
 	}
 
@@ -568,6 +584,7 @@ const uint8_t orig_pga       = 6;   //  -3dB
 			const int16_t gain_dB    = lna_short_dB[lna_short] + lna_dB[lna] + mixer_dB[mixer] + pga_dB[pga];
 			if (s != NULL)
 				sprintf(s, "idx %2d %4ddB %3u", index, gain_dB, prev_rssi[vfo]);
+			counter = 1;
 		}
 
 	#endif

app/action.c

@@ -66,27 +66,25 @@ void ACTION_Power(void)
 	gRequestDisplayScreen = gScreenToDisplay;
 }
 
-static void ACTION_Monitor(void)
+void ACTION_Monitor(void)
 {
 	if (gCurrentFunction != FUNCTION_MONITOR)
-	{
+	{	// enable the monitor
 		RADIO_SelectVfos();
-
 		#ifdef ENABLE_NOAA
 			if (gRxVfo->CHANNEL_SAVE >= NOAA_CHANNEL_FIRST && gIsNoaaMode)
 				gNoaaChannel = gRxVfo->CHANNEL_SAVE - NOAA_CHANNEL_FIRST;
 		#endif
-		
 		RADIO_SetupRegisters(true);
-
 		APP_StartListening(FUNCTION_MONITOR, false);
-
 		return;
 	}
 
+	gMonitor = false;
+	
 	if (gScanState != SCAN_OFF)
 	{
-		ScanPauseDelayIn_10ms = 500;     // 5 seconds
+		ScanPauseDelayIn_10ms = scan_pause_delay_in_1_10ms;
 		gScheduleScanListen   = false;
 		gScanPauseMode        = true;
 	}
@@ -98,7 +96,7 @@ static void ACTION_Monitor(void)
 			gScheduleNOAA        = false;
 		}
 	#endif
-	
+
 	RADIO_SetupRegisters(true);
 
 	#ifdef ENABLE_FMRADIO
@@ -117,14 +115,18 @@ void ACTION_Scan(bool bRestart)
 	#ifdef ENABLE_FMRADIO
 		if (gFmRadioMode)
 		{
-			if (gCurrentFunction != FUNCTION_RECEIVE && gCurrentFunction != FUNCTION_MONITOR && gCurrentFunction != FUNCTION_TRANSMIT)
+			if (gCurrentFunction != FUNCTION_RECEIVE &&
+			    gCurrentFunction != FUNCTION_MONITOR &&
+			    gCurrentFunction != FUNCTION_TRANSMIT)
 			{
 				GUI_SelectNextDisplay(DISPLAY_FM);
-	
+
+				gMonitor = false;
+
 				if (gFM_ScanState != FM_SCAN_OFF)
 				{
 					FM_PlayAndUpdate();
-	
+
 					#ifdef ENABLE_VOICE
 						gAnotherVoiceID = VOICE_ID_SCANNING_STOP;
 					#endif
@@ -132,7 +134,7 @@ void ACTION_Scan(bool bRestart)
 				else
 				{
 					uint16_t Frequency;
-	
+
 					if (bRestart)
 					{
 						gFM_AutoScan        = true;
@@ -146,16 +148,16 @@ void ACTION_Scan(bool bRestart)
 						gFM_ChannelPosition = 0;
 						Frequency           = gEeprom.FM_FrequencyPlaying;
 					}
-	
+
 					BK1080_GetFrequencyDeviation(Frequency);
 					FM_Tune(Frequency, 1, bRestart);
-	
+
 					#ifdef ENABLE_VOICE
 						gAnotherVoiceID = VOICE_ID_SCANNING_BEGIN;
 					#endif
 				}
 			}
-			
+
 			return;
 		}
 	#endif
@@ -163,6 +165,8 @@ void ACTION_Scan(bool bRestart)
 	if (gScreenToDisplay != DISPLAY_SCANNER)
 	{	// not scanning
 
+		gMonitor = false;
+
 		RADIO_SelectVfos();
 
 		#ifdef ENABLE_NOAA
@@ -201,6 +205,8 @@ void ACTION_Scan(bool bRestart)
 	if (!bRestart)
 	{	// scanning
 
+		gMonitor = false;
+
 		SCANNER_Stop();
 
 		#ifdef ENABLE_VOICE
@@ -241,19 +247,21 @@ void ACTION_Vox(void)
 			if (gFmRadioMode)
 			{
 				FM_TurnOff();
-	
+
 				gInputBoxIndex        = 0;
 				gVoxResumeCountdown   = 80;
 				gFlagReconfigureVfos  = true;
 				gRequestDisplayScreen = DISPLAY_MAIN;
 				return;
 			}
-			
+
+			gMonitor = false;
+
 			RADIO_SelectVfos();
 			RADIO_SetupRegisters(true);
-	
+
 			FM_Start();
-	
+
 			gInputBoxIndex        = 0;
 			gRequestDisplayScreen = DISPLAY_FM;
 		}
@@ -280,7 +288,7 @@ void ACTION_Handle(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 					return;
 				}
 			}
-			
+
 			#ifdef ENABLE_VOICE
 				gAnotherVoiceID   = VOICE_ID_CANCEL;
 			#endif

app/action.h

@@ -21,7 +21,7 @@
 
 //static void ACTION_FlashLight(void)
 void ACTION_Power(void);
-//static void ACTION_Monitor(void)
+void ACTION_Monitor(void);
 void ACTION_Scan(bool bFlag);
 void ACTION_Vox(void);
 #ifdef ENABLE_ALARM

app/app.c

@@ -203,7 +203,7 @@ static void APP_HandleIncoming(void)
 		}
 	}
 
-	APP_StartListening(FUNCTION_RECEIVE, false);
+	APP_StartListening(gMonitor ? FUNCTION_MONITOR : FUNCTION_RECEIVE, false);
 }
 
 static void APP_HandleReceive(void)
@@ -979,14 +979,14 @@ void APP_Update(void)
 		if (IS_FREQ_CHANNEL(gNextMrChannel))
 		{
 			if (gCurrentFunction == FUNCTION_INCOMING)
-				APP_StartListening(FUNCTION_RECEIVE, true);
+				APP_StartListening(gMonitor ? FUNCTION_MONITOR : FUNCTION_RECEIVE, true);
 			else
 				FREQ_NextChannel();
 		}
 		else
 		{
 			if (gCurrentCodeType == CODE_TYPE_OFF && gCurrentFunction == FUNCTION_INCOMING)
-				APP_StartListening(FUNCTION_RECEIVE, true);
+				APP_StartListening(gMonitor ? FUNCTION_MONITOR : FUNCTION_RECEIVE, true);
 			else
 				MR_NextChannel();
 		}
@@ -1726,8 +1726,13 @@ void APP_TimeSlice500ms(void)
 						gAskToDelete     = false;
 
 						#ifdef ENABLE_FMRADIO
-							if (gFmRadioMode && gCurrentFunction != FUNCTION_RECEIVE && gCurrentFunction != FUNCTION_MONITOR && gCurrentFunction != FUNCTION_TRANSMIT)
+							if (gFmRadioMode &&
+							    gCurrentFunction != FUNCTION_RECEIVE &&
+								gCurrentFunction != FUNCTION_MONITOR &&
+								gCurrentFunction != FUNCTION_TRANSMIT)
+							{
 								GUI_SelectNextDisplay(DISPLAY_FM);
+							}
 							else
 						#endif
 						#ifdef ENABLE_NO_SCAN_TIMEOUT
@@ -1747,7 +1752,11 @@ void APP_TimeSlice500ms(void)
 			if (--gFM_ResumeCountdown_500ms == 0)
 			{
 				RADIO_SetVfoState(VFO_STATE_NORMAL);
-				if (gCurrentFunction != FUNCTION_RECEIVE && gCurrentFunction != FUNCTION_TRANSMIT && gCurrentFunction != FUNCTION_MONITOR && gFmRadioMode)
+
+				if (gCurrentFunction != FUNCTION_RECEIVE  &&
+				    gCurrentFunction != FUNCTION_TRANSMIT &&
+				    gCurrentFunction != FUNCTION_MONITOR  &&
+					gFmRadioMode)
 				{	// switch back to FM radio mode
 					FM_Start();
 					GUI_SelectNextDisplay(DISPLAY_FM);
@@ -1919,7 +1928,7 @@ void CHANNEL_Next(bool bFlag, int8_t Direction)
 		FREQ_NextChannel();
 	}
 
-	ScanPauseDelayIn_10ms = 50;    // 500ms
+	ScanPauseDelayIn_10ms = scan_pause_delay_in_2_10ms;
 	gScheduleScanListen   = false;
 	gRxReceptionMode      = RX_MODE_NONE;
 	gScanPauseMode        = false;
@@ -2340,6 +2349,9 @@ Skip:
 		gVFO_RSSI_bar_level[1]      = 0;
 
 		gFlagReconfigureVfos        = false;
+
+		if (gMonitor)
+			ACTION_Monitor();   // 1of11
 	}
 
 	if (gFlagRefreshSetting)
@@ -2350,6 +2362,8 @@ Skip:
 
 	if (gFlagStartScan)
 	{
+		gMonitor = false;
+		
 		#ifdef ENABLE_VOICE
 			AUDIO_SetVoiceID(0, VOICE_ID_SCANNING_BEGIN);
 			AUDIO_PlaySingleVoice(true);

app/menu.c

@@ -57,7 +57,7 @@ void MENU_StartCssScan(int8_t Direction)
 
 	MENU_SelectNextCode();
 
-	ScanPauseDelayIn_10ms = 50;
+	ScanPauseDelayIn_10ms = scan_pause_delay_in_2_10ms;
 	gScheduleScanListen   = false;
 }
 
@@ -746,7 +746,7 @@ void MENU_SelectNextCode(void)
 
 	RADIO_SetupRegisters(true);
 
-	ScanPauseDelayIn_10ms = (gSelectedCodeType == CODE_TYPE_CONTINUOUS_TONE) ? 20 : 30;
+	ScanPauseDelayIn_10ms = (gSelectedCodeType == CODE_TYPE_CONTINUOUS_TONE) ? scan_pause_delay_in_3_10ms : scan_pause_delay_in_4_10ms;
 
 	gUpdateDisplay = true;
 }

functions.c

@@ -125,8 +125,12 @@ void FUNCTION_Select(FUNCTION_Type_t Function)
 			return;
 	
 		case FUNCTION_MONITOR:
+			gMonitor = true;
+			break;
+			
 		case FUNCTION_INCOMING:
 		case FUNCTION_RECEIVE:
+			gMonitor = false;
 			break;
 	
 		case FUNCTION_POWER_SAVE:
@@ -134,6 +138,8 @@ void FUNCTION_Select(FUNCTION_Type_t Function)
 			gPowerSaveCountdownExpired = false;
 
 			gRxIdleMode = true;
+			
+			gMonitor = false;
 
 			BK4819_DisableVox();
 			BK4819_Sleep();

misc.c

@@ -47,6 +47,11 @@ const uint16_t    dual_watch_count_noaa_10ms       =    70 / 10;   // 70ms
 const uint16_t    dual_watch_count_after_vox_10ms  =   200 / 10;   // 200ms
 const uint16_t    dual_watch_count_toggle_10ms     =   100 / 10;   // 100ms between VFO toggles
 
+const uint16_t    scan_pause_delay_in_1_10ms       =  5000 / 10;   // 5 seconds
+const uint16_t    scan_pause_delay_in_2_10ms       =   500 / 10;   // 500ms
+const uint16_t    scan_pause_delay_in_3_10ms       =   200 / 10;   // 200ms
+const uint16_t    scan_pause_delay_in_4_10ms       =   300 / 10;   // 300ms
+
 const uint16_t    battery_save_count_10ms          = 10000 / 10;   // 10 seconds
 
 const uint16_t    power_save1_10ms                 =   100 / 10;   // 100ms
@@ -84,6 +89,8 @@ bool              gSetting_ScrambleEnable;
 bool              gSetting_live_DTMF_decoder;
 uint8_t           gSetting_battery_text;
 
+bool              gMonitor = false;           // true opens the squelch
+
 uint32_t          gCustomAesKey[4];
 bool              bHasCustomAesKey;
 uint32_t          gChallenge[4];

misc.h

@@ -121,6 +121,11 @@ extern const uint16_t        dual_watch_count_toggle_10ms;
 extern const uint16_t        dual_watch_count_noaa_10ms;
 extern const uint16_t        dual_watch_count_after_vox_10ms;
 
+extern const uint16_t        scan_pause_delay_in_1_10ms;
+extern const uint16_t        scan_pause_delay_in_2_10ms;
+extern const uint16_t        scan_pause_delay_in_3_10ms;
+extern const uint16_t        scan_pause_delay_in_4_10ms;
+
 extern const uint16_t        gMax_bat_v;
 extern const uint16_t        gMin_bat_v;
 
@@ -147,6 +152,8 @@ extern bool                  gSetting_ScrambleEnable;
 extern bool                  gSetting_live_DTMF_decoder;
 extern uint8_t               gSetting_battery_text;
 
+extern bool                  gMonitor;
+
 extern const uint32_t        gDefaultAesKey[4];
 extern uint32_t              gCustomAesKey[4];
 extern bool                  bHasCustomAesKey;

radio.c

@@ -669,11 +669,7 @@ void RADIO_SetupRegisters(bool bSwitchToFunction0)
 					//	BK4819_SetTailDetection(670);       // 67Hz
 					//#endif
 
-					InterruptMask = 0
+					InterruptMask = BK4819_REG_3F_CxCSS_TAIL | BK4819_REG_3F_SQUELCH_FOUND | BK4819_REG_3F_SQUELCH_LOST;
-						| BK4819_REG_3F_CxCSS_TAIL
-						| BK4819_REG_3F_SQUELCH_FOUND
-						| BK4819_REG_3F_SQUELCH_LOST;
-
 					break;
 
 				case CODE_TYPE_CONTINUOUS_TONE: