Merge pull request #7 from DigitalConfections/master

Bring in latest from head

Arduino-microfox/Arduino-microfox.ino

@@ -72,6 +72,9 @@ volatile int g_startclock_interval = 60;
 
 volatile BOOL g_audio_tone_on = FALSE;
 volatile uint8_t g_lastSeconds = 0x00;
+volatile int16_t g_sync_pin_timer = 0;
+volatile BOOL g_sync_pin_stable = FALSE;
+volatile BOOL g_sync_enabled = TRUE;
 
 #ifndef COMPILE_FOR_ATMELSTUDIO7
 	FoxType& operator++ (FoxType & orig)
@@ -136,7 +139,6 @@ static uint16_t EEMEM ee_ID_time;
 static uint16_t EEMEM ee_clock_calibration;
 static uint8_t EEMEM ee_override_DIP_switches;
 static uint8_t EEMEM ee_enable_LEDs;
-static uint8_t EEMEM ee_enable_sync;
 static int16_t EEMEM ee_temp_calibration;
 static uint8_t EEMEM ee_enable_start_timer;
 
@@ -149,13 +151,10 @@ static volatile uint16_t g_clock_calibration = EEPROM_CLOCK_CALIBRATION_DEFAULT;
 static volatile int16_t g_temp_calibration = EEPROM_TEMP_CALIBRATION_DEFAULT;
 static volatile uint8_t g_override_DIP_switches = EEPROM_OVERRIDE_DIP_SW_DEFAULT;
 static volatile uint8_t g_enable_LEDs;
-static volatile uint8_t g_enable_sync;
 static volatile uint8_t g_enable_start_timer;
 
 static char g_tempStr[TEMP_STRING_LENGTH] = { '\0' };
 
-static volatile uint8_t g_start_override = FALSE;
-
 /*
  * Function Prototypes
  */
@@ -168,6 +167,7 @@ void setUpTemp(void);
 void sendMorseTone(BOOL onOff);
 void playStartingTone(uint8_t toneFreq);
 void wdt_init(WDReset resetType);
+void doSynchronization(void);
 
 #ifdef COMPILE_FOR_ATMELSTUDIO7
 	void loop(void);
@@ -178,7 +178,7 @@ void wdt_init(WDReset resetType);
 {
 	while(initializeEEPROMVars())
 	{
-		;                                                                                                                                                                                                                                                                                           /* Initialize variables stored in EEPROM */
+		;                                                                                                                                                                                                                                                                                                                                                   /* Initialize variables stored in EEPROM */
 	}
 
 	setUpTemp();
@@ -186,26 +186,26 @@ void wdt_init(WDReset resetType);
 	cli();                          /*stop interrupts for setup */
 
 	/* set pins as outputs */
-	pinMode(PIN_NANO_LED, OUTPUT);  /* The nano amber LED: This led blinks when off cycle and blinks with code when on cycle. */
+	pinMode(PIN_LED, OUTPUT);  /* The nano amber LED: This led blinks when off cycle and blinks with code when on cycle. */
-	digitalWrite(PIN_NANO_LED, OFF);
+	digitalWrite(PIN_LED, OFF);
-	pinMode(PIN_NANO_KEY, OUTPUT);  /* This pin is used to control the KEY line to the transmittter only active on cycle. */
+	pinMode(PIN_MORSE_KEY, OUTPUT);  /* This pin is used to control the KEY line to the transmittter only active on cycle. */
-	digitalWrite(PIN_NANO_KEY, OFF);
+	digitalWrite(PIN_MORSE_KEY, OFF);
 	pinMode(PIN_AUDIO_OUT, OUTPUT);
 	digitalWrite(PIN_AUDIO_OUT, OFF);
 
 #if !HARDWARE_EXTERNAL_DIP_PULLUPS_INSTALLED
-		pinMode(PIN_NANO_SYNC, INPUT_PULLUP);   /* Sync button */
+		pinMode(PIN_SYNC, INPUT_PULLUP);   /* Sync button */
-		pinMode(PIN_NANO_DIP_0, INPUT_PULLUP);  /* DIP switch LSB */
+		pinMode(PIN_DIP_0, INPUT_PULLUP);  /* DIP switch LSB */
-		pinMode(PIN_NANO_DIP_1, INPUT_PULLUP);  /* DIP switch middle bit */
+		pinMode(PIN_DIP_1, INPUT_PULLUP);  /* DIP switch middle bit */
-		pinMode(PIN_NANO_DIP_2, INPUT_PULLUP);  /* DIP switch MSB */
+		pinMode(PIN_DIP_2, INPUT_PULLUP);  /* DIP switch MSB */
 #else
-		pinMode(PIN_NANO_SYNC, INPUT);          /* Sync button */
+		pinMode(PIN_SYNC, INPUT);          /* Sync button */
-		pinMode(PIN_NANO_DIP_0, INPUT);         /* DIP switch LSB */
+		pinMode(PIN_DIP_0, INPUT);         /* DIP switch LSB */
-		pinMode(PIN_NANO_DIP_1, INPUT);         /* DIP switch middle bit */
+		pinMode(PIN_DIP_1, INPUT);         /* DIP switch middle bit */
-		pinMode(PIN_NANO_DIP_2, INPUT);         /* DIP switch MSB */
+		pinMode(PIN_DIP_2, INPUT);         /* DIP switch MSB */
 #endif /* HARDWARE_EXTERNAL_DIP_PULLUPS_INSTALLED */
 
-	digitalWrite(PIN_NANO_LED, OFF);            /* Turn off led sync switch is now open */
+	digitalWrite(PIN_LED, OFF);            /* Turn off led sync switch is now open */
 
 /* set timer1 interrupt at 1Hz */
 	TCCR1A = 0;                                 /* set entire TCCR1A register to 0 */
@@ -248,17 +248,22 @@ void wdt_init(WDReset resetType);
 	/* Timer 0 is for audio Start tone generation and control
 	 * Note: Do not use millis() or DELAY() after TIMER0 has been reconfigured here! */
 	TCCR0A = 0x00;
-/*	TCCR0A |= (1 << COM0A0) | (1 << WGM01);  / * Set toggle OC0A, CTC mode * / */
+	TCCR0A |= (1 << WGM01);     /* Set CTC mode */
-	TCCR0A |= (1 << WGM01); /* Set CTC mode */
 	TCCR0B = 0x00;
-	TCCR0B |= (1 << CS02);  /* Prescale 256 */
+	TCCR0B |= (1 << CS02);      /* Prescale 256 */
 	OCR0A = DEFAULT_TONE_FREQUENCY;
 	TIMSK0 = 0x00;
 	TIMSK0 |= (1 << OCIE0A);
 
-	sei();              /*allow interrupts. Arm and run */
+	/* Sync button pin change interrupt */
+	PCMSK2 = 0x00;
+	PCMSK2 = (1 << PCINT19);    /* Enable PCINT19 */
+	PCICR = 0x00;
+	PCICR = (1 << PCIE2);       /* Enable pin change interrupt 2 */
 
-	linkbus_init(BAUD); /* Start the Link Bus serial comms */
+	sei();                      /*allow interrupts. Arm and run */
+
+	linkbus_init(BAUD);         /* Start the Link Bus serial comms */
 
 	lb_send_string((char*)"\n\nStored Data:\n", TRUE);
 	sprintf(g_tempStr, "  ID: %s\n", g_messages_text[STATION_ID]);
@@ -269,8 +274,6 @@ void wdt_init(WDReset resetType);
 	lb_send_string(g_tempStr, TRUE);
 	sprintf(g_tempStr, "  LED: %s\n", g_enable_LEDs ? "ON" : "OFF");
 	lb_send_string(g_tempStr, TRUE);
-	sprintf(g_tempStr, "  SYN: %s\n", g_enable_sync ? "ON" : "OFF");
-	lb_send_string(g_tempStr, TRUE);
 	sprintf(g_tempStr, "  STA: %s\n", g_enable_start_timer ? "ON" : "OFF");
 	lb_send_string(g_tempStr, TRUE);
 	lb_send_NewPrompt();
@@ -285,62 +288,28 @@ void wdt_init(WDReset resetType);
 	}
 	else                                        /* Read DIP Switches */
 	{
-		if(digitalRead(PIN_NANO_DIP_0) == LOW)  /*Lsb */
+		if(digitalRead(PIN_DIP_0) == LOW)  /*Lsb */
 		{
 			g_fox++;
 		}
-		if(digitalRead(PIN_NANO_DIP_1) == LOW)  /* middle bit */
+		if(digitalRead(PIN_DIP_1) == LOW)  /* middle bit */
 		{
 			g_fox += 2;
 		}
-		if(digitalRead(PIN_NANO_DIP_2) == LOW)  /* MSB */
+		if(digitalRead(PIN_DIP_2) == LOW)  /* MSB */
 		{
 			g_fox += 4;
 		}
 	}
 
-/*
- * we now look at the sync line and then reset the time counters
- * when the sync switch is released.
- * */
-	if(g_enable_sync && (g_enable_start_timer || ((g_fox != FOXORING) && (g_fox != BEACON) && (g_fox != FOX_DEMO) && (g_fox != SPRINT_DEMO) && (g_fox != SPECTATOR))))
-	{
-		lb_send_string((char*)"Waiting for sync.\n", TRUE);
-		lb_send_string((char*)"Type \"GO\"\n", TRUE);
-		lb_send_NewPrompt();
-
-		while(( digitalRead(PIN_NANO_SYNC) == LOW) && !g_start_override)
-		{
-			if(g_enable_LEDs)
-			{
-				digitalWrite(PIN_NANO_LED, HIGH);   /* arduino nano LED turn on led to show sync switch is closed */
-			}
-
-			handleLinkBusMsgs();
-		}
-	}
-	else
-	{
-		lb_send_string((char*)"Tx is running!\n", TRUE);
-		lb_send_NewPrompt();
-	}
-
-	TCNT1 = 0;  /* Initialize 1-second counter value to 0 */
-	g_seconds_since_sync = 0;
-	g_fox_seconds_into_interval = 0;
-
-	g_start_override = TRUE;
-
 #if !HARDWARE_EXTERNAL_DIP_PULLUPS_INSTALLED
 		/* Disable pull-ups to save power */
-		pinMode(PIN_NANO_SYNC, INPUT);  /* Sync button input */
+		pinMode(PIN_DIP_0, INPUT); /* fox switch LSB */
-		pinMode(PIN_NANO_DIP_0, INPUT); /* fox switch LSB */
+		pinMode(PIN_DIP_1, INPUT); /* fox switch middle bit */
-		pinMode(PIN_NANO_DIP_1, INPUT); /* fox switch middle bit */
+		pinMode(PIN_DIP_2, INPUT); /* fox switch MSB */
-		pinMode(PIN_NANO_DIP_2, INPUT); /* fox switch MSB */
+		pinMode(PIN_DIP_0, OUTPUT);
-		pinMode(PIN_NANO_SYNC, OUTPUT);
+		pinMode(PIN_DIP_1, OUTPUT);
-		pinMode(PIN_NANO_DIP_0, OUTPUT);
+		pinMode(PIN_DIP_2, OUTPUT);
-		pinMode(PIN_NANO_DIP_1, OUTPUT);
-		pinMode(PIN_NANO_DIP_2, OUTPUT);
 #endif  /* HARDWARE_EXTERNAL_DIP_PULLUPS_INSTALLED */
 
 	if((g_fox == BEACON) || (g_fox == SPECTATOR))
@@ -424,6 +393,28 @@ void __attribute__((optimize("O1"))) wdt_init(WDReset resetType)
 }
 
 
+/***********************************************************************
+ * Pin Change Interrupt 2 ISR
+ *
+ * Handles SYNC pin operation
+ *
+ ************************************************************************/
+ISR(PCINT2_vect)
+{
+	BOOL pinVal = digitalRead(3);
+
+	if(pinVal)  /* Sync is high */
+	{
+		if(g_sync_pin_stable)
+		{
+			doSynchronization();
+		}
+	}
+
+	g_sync_pin_timer = 0;
+}
+
+
 /***********************************************************************
  * Watchdog Timeout ISR
  *
@@ -708,6 +699,23 @@ ISR( TIMER2_COMPB_vect )
 	static BOOL playMorse = TRUE;
 	BOOL repeat = TRUE, finished = FALSE;
 
+	if(g_sync_enabled)
+	{
+		if(digitalRead(PIN_SYNC) == LOW)
+		{
+			if(g_sync_pin_timer < TIMER2_SECONDS_3)
+			{
+				g_sync_pin_timer++;
+			}
+
+			if(g_sync_pin_timer > TIMER2_SECONDS_1)
+			{
+				g_sync_pin_stable = TRUE;
+				digitalWrite(PIN_LED, HIGH);
+			}
+		}
+	}
+
 	if(blink_counter < -BLINK_LONG)
 	{
 		blink_count_direction = 1;
@@ -812,10 +820,10 @@ ISR( TIMER2_COMPB_vect )
 				{
 					if(g_enable_LEDs)
 					{
-						digitalWrite(PIN_NANO_LED, HIGH);   /*  Nano LED */
+						digitalWrite(PIN_LED, HIGH);   /*  LED */
 					}
 
-					digitalWrite(PIN_NANO_KEY, HIGH);       /* TX key line */
+					digitalWrite(PIN_MORSE_KEY, HIGH);       /* TX key line */
 				}
 
 				if(playMorse)
@@ -826,12 +834,12 @@ ISR( TIMER2_COMPB_vect )
 		}
 		else
 		{
-			if(g_enable_LEDs)
+			if(g_enable_LEDs && !g_sync_pin_stable)
 			{
-				digitalWrite(PIN_NANO_LED, key);    /*  nano LED */
+				digitalWrite(PIN_LED, key);    /*  LED */
 			}
 
-			digitalWrite(PIN_NANO_KEY, key);        /* TX key line */
+			digitalWrite(PIN_MORSE_KEY, key);        /* TX key line */
 			codeInc = g_code_throttle;
 			if(playMorse)
 			{
@@ -844,8 +852,11 @@ ISR( TIMER2_COMPB_vect )
 		if(key)
 		{
 			key = OFF;
-			digitalWrite(PIN_NANO_LED, LOW);    /*  nano LED */
+			if(!g_sync_pin_stable)
-			digitalWrite(PIN_NANO_KEY, LOW);    /* TX key line */
+			{
+				digitalWrite(PIN_LED, LOW);    /*  LED Off */
+			}
+			digitalWrite(PIN_MORSE_KEY, LOW);        /* TX key line */
 		}
 
 		if(playMorse)
@@ -893,6 +904,15 @@ ISR(TIMER1_COMPA_vect)              /*timer1 interrupt 1Hz */
 		if(g_fox_counter > g_number_of_foxes)
 		{
 			g_fox_counter = 1;
+
+			if(g_sync_enabled)
+			{
+				PCMSK2 &= ~(1 << PCINT19);      /* Disable PCINT19 */
+				PCICR &= ~(1 << PCIE2);         /* Disable pin change interrupt 2 */
+				pinMode(PIN_SYNC, INPUT);
+				pinMode(PIN_SYNC, OUTPUT); /* Set sync pin as output low */
+				g_sync_enabled = FALSE;
+			}
 		}
 		g_fox_transition = TRUE;
 		g_fox_seconds_into_interval = 0;
@@ -1002,11 +1022,14 @@ void loop()
 			{
 				if(g_blinky_time)
 				{
-					digitalWrite(PIN_NANO_LED,OFF);
+					if(!g_sync_pin_stable)
+					{
+						digitalWrite(PIN_LED,OFF);
+					}
 				}
 				else
 				{
-					digitalWrite(PIN_NANO_LED,ON);
+					digitalWrite(PIN_LED,ON);
 				}
 			}
 		}
@@ -1244,27 +1267,6 @@ void __attribute__((optimize("O0"))) handleLinkBusMsgs()
 			}
 			break;
 
-			case MESSAGE_SYNC_ENABLE:
-			{
-				if(lb_buff->fields[FIELD1][0])
-				{
-					if((lb_buff->fields[FIELD1][1] == 'F') || (lb_buff->fields[FIELD1][0] == '0'))
-					{
-						g_enable_sync = FALSE;
-					}
-					else
-					{
-						g_enable_sync = TRUE;
-					}
-
-					saveAllEEPROM();
-				}
-
-				sprintf(g_tempStr,"SYN:%s\n",g_enable_sync ? "ON" : "OFF");
-				lb_send_string(g_tempStr,FALSE);
-			}
-			break;
-
 			case MESSAGE_STARTTONES_ENABLE:
 			{
 				if(lb_buff->fields[FIELD1][0])
@@ -1288,21 +1290,8 @@ void __attribute__((optimize("O0"))) handleLinkBusMsgs()
 
 			case MESSAGE_GO:
 			{
-				if(g_start_override)
+				doSynchronization();
-				{
+				lb_send_string((char*)"Re-sync successful!\n",FALSE);
-					lb_send_string((char*)"Re-sync successful!\n",FALSE);
-				}
-				else
-				{
-					g_start_override = TRUE;
-					lb_send_string((char*)"Running!\n",FALSE);
-				}
-
-				cli();
-				TCNT1 = 0;  /* Initialize 1-second counter value to 0 */
-				g_seconds_since_sync = 0;
-				g_fox_seconds_into_interval = 0;
-				sei();
 			}
 			break;
 
@@ -1450,7 +1439,7 @@ void __attribute__((optimize("O0"))) handleLinkBusMsgs()
 				}
 
 				float temp = 10. * getTemp();
-				sprintf(g_tempStr,"Temp: %d.%dC\n",(int)temp / 10,(int)temp % 10);
+				sprintf(g_tempStr,"Temp: %d.%dC\n",(int)temp / 10,abs((int)temp % 10));
 				lb_send_string(g_tempStr,FALSE);
 			}
 			break;
@@ -1488,7 +1477,6 @@ BOOL initializeEEPROMVars()
 		g_temp_calibration = (int16_t)eeprom_read_word((uint16_t*)&ee_temp_calibration);
 		g_override_DIP_switches = eeprom_read_byte(&ee_override_DIP_switches);
 		g_enable_LEDs = eeprom_read_byte(&ee_enable_LEDs);
-		g_enable_sync = eeprom_read_byte(&ee_enable_sync);
 		g_enable_start_timer = eeprom_read_byte(&ee_enable_start_timer);
 
 		for(i = 0; i < 20; i++)
@@ -1519,7 +1507,6 @@ BOOL initializeEEPROMVars()
 		g_temp_calibration = EEPROM_TEMP_CALIBRATION_DEFAULT;
 		g_override_DIP_switches = EEPROM_OVERRIDE_DIP_SW_DEFAULT;
 		g_enable_LEDs = EEPROM_ENABLE_LEDS_DEFAULT;
-		g_enable_sync = EEPROM_ENABLE_SYNC_DEFAULT;
 		g_enable_start_timer = EEPROM_ENABLE_STARTTIMER_DEFAULT;
 		strncpy(g_messages_text[STATION_ID],EEPROM_STATION_ID_DEFAULT,MAX_PATTERN_TEXT_LENGTH);
 		strncpy(g_messages_text[PATTERN_TEXT],EEPROM_PATTERN_TEXT_DEFAULT,MAX_PATTERN_TEXT_LENGTH);
@@ -1549,7 +1536,6 @@ void saveAllEEPROM()
 	eeprom_update_word((uint16_t*)&ee_temp_calibration,(uint16_t)g_temp_calibration);
 	eeprom_update_byte(&ee_override_DIP_switches,g_override_DIP_switches);
 	eeprom_update_byte(&ee_enable_LEDs,g_enable_LEDs);
-	eeprom_update_byte(&ee_enable_sync,g_enable_sync);
 	eeprom_update_byte(&ee_enable_start_timer,g_enable_start_timer);
 
 	for(i = 0; i < strlen(g_messages_text[STATION_ID]); i++)
@@ -1626,9 +1612,24 @@ uint16_t readADC()
  */
 float getTemp(void)
 {
-	float offset = (float)g_temp_calibration / 10.;
+	float offset = CLAMP(-200.,(float)g_temp_calibration / 10.,200.);
 
 	/* The offset (first term) was determined empirically */
 	readADC();  /* throw away first reading */
 	return(offset + (readADC() - 324.31) / 1.22);
 }
+
+
+void doSynchronization(void)
+{
+	cli();
+	TCNT1 = 0;  /* Initialize 1-second counter value to 0 */
+	g_seconds_since_sync = 0;
+	g_fox_seconds_into_interval = 0;
+	g_sync_pin_stable = FALSE;
+	digitalWrite(PIN_LED,LOW);
+	g_on_the_air = 0;
+	g_fox_counter = 1;  /* Don't count on the 1-sec timer setting this in time */
+	sei();
+}
+

Arduino-microfox/defs.h

@@ -61,7 +61,7 @@
 
 /******************************************************
  * Set the text that gets displayed to the user */
-#define SW_REVISION "0.11"
+#define SW_REVISION "0.13"
 
 //#define TRANQUILIZE_WATCHDOG
 
@@ -89,12 +89,12 @@ typedef unsigned char uint8_t;
 #define null 0
 #endif
 
-#define PIN_NANO_LED 13
+#define PIN_LED 13
-#define PIN_NANO_KEY 2
+#define PIN_MORSE_KEY 2
-#define PIN_NANO_SYNC 3
+#define PIN_SYNC 3
-#define PIN_NANO_DIP_0 4
+#define PIN_DIP_0 4
-#define PIN_NANO_DIP_1 5
+#define PIN_DIP_1 5
-#define PIN_NANO_DIP_2 6
+#define PIN_DIP_2 6
 #define PIN_AUDIO_OUT 9
 
 typedef enum {
@@ -141,7 +141,7 @@ typedef enum
 
 /******************************************************
  * EEPROM definitions */
-#define EEPROM_INITIALIZED_FLAG 0xB3
+#define EEPROM_INITIALIZED_FLAG 0xB4
 #define EEPROM_UNINITIALIZED 0x00
 
 #define EEPROM_STATION_ID_DEFAULT "FOXBOX"
@@ -160,25 +160,8 @@ typedef enum
 #define EEPROM_TEMP_CALIBRATION_DEFAULT 147
 #define EEPROM_OVERRIDE_DIP_SW_DEFAULT 0
 #define EEPROM_ENABLE_LEDS_DEFAULT 1
-#define EEPROM_ENABLE_SYNC_DEFAULT 1
 #define EEPROM_ENABLE_STARTTIMER_DEFAULT 1
 
-#define EEPROM_SI5351_CALIBRATION_DEFAULT 0x00
-#define EEPROM_CLK0_OUT_DEFAULT 133000000
-#define EEPROM_CLK1_OUT_DEFAULT 70000000
-#define EEPROM_CLK2_OUT_DEFAULT 10700000
-#define EEPROM_CLK0_ONOFF_DEFAULT OFF
-#define EEPROM_CLK1_ONOFF_DEFAULT OFF
-#define EEPROM_CLK2_ONOFF_DEFAULT OFF
-
-#define EEPROM_BATTERY_EMPTY_MV 3430
-
-/******************************************************
- * General definitions for making the code easier to understand */
-#define         SDA_PIN (1 << PINC4)
-#define         SCL_PIN (1 << PINC5)
-#define         I2C_PINS (SCL_PIN | SDA_PIN)
-
 #ifndef FALSE
    #define FALSE 0
 #endif
@@ -217,6 +200,7 @@ typedef enum
 #define MAX_TIME 4294967295L
 #define MAX_UINT16 65535
 #define MAX_INT16 32767
+#define MIN_INT16 -32768
 
 /* Periodic TIMER2 interrupt timing definitions */
 #define TIMER2_57HZ 10

Arduino-microfox/linkbus.h

@@ -96,7 +96,6 @@ typedef enum
 	MESSAGE_FACTORY_RESET = 'F' * 100 + 'A' * 10 + 'C', /* Sets EEPROM back to defaults */
 	MESSAGE_OVERRIDE_DIP = 'D' * 100 + 'I' * 10 + 'P',  /* Override DIP switch settings using this value */
 	MESSAGE_LEDS = 'L' * 100 + 'E' * 10 + 'D',          /* Turn on or off LEDs - accepts 1 or 0 or ON or OFF */
-	MESSAGE_SYNC_ENABLE = 'S' * 100 + 'Y' * 10 + 'N',   /* Enable or disable transmitter syncing */
 	MESSAGE_TEMP = 'T' * 100 + 'E' * 10 + 'M',          /* Temperature  data */
 	MESSAGE_SET_STATION_ID = 'I' * 10 + 'D',            /* Sets amateur radio callsign text */
 	MESSAGE_GO = 'G' * 10 + 'O',                        /* Synchronizes clock */

README.md

@@ -29,8 +29,6 @@
 <b>> SPD</b>  <= <i>Displays the ID code speed setting</i><br>
 <b>> STA [on|off]</b>  <= <i>* Turns on/off the starting tones function</i><br>
 <b>> STA</b>  <= <i>Displays the starting tones setting</i><br>
-<b>> SYN [on|off]</b>  <= <i>* Turns on/off synchronization using sync button or "GO" command</i><br>
-<b>> SYN</b>  <= <i>Displays the synchronization setting</i><br>
 <b>> TEM</b>  <= <i>Displays the processor's temperature in C</i><br>
 <b>> VER</b>  <= <i>Displays the software version number</i></p></pre>