ADC Sharing and Data Error Flags

LibAPRS/AFSK.cpp

@@ -9,6 +9,7 @@ extern bool LibAPRS_open_squelch;
 
 bool hw_afsk_dac_isr = false;
 bool hw_5v_ref = false;
+bool fullBfrErr=false;
 Afsk *AFSK_modem;
 
 
@@ -25,36 +26,39 @@ void AFSK_hw_refDetect(void) {
     }
 }
 
-void AFSK_hw_init(void) {
-    // Set up ADC
-
-    AFSK_hw_refDetect();
-
-    TCCR1A = 0;                                    
-    TCCR1B = _BV(CS10) | _BV(WGM13) | _BV(WGM12);
-    ICR1 = (((CPU_FREQ+FREQUENCY_CORRECTION)) / 9600) - 1;
-
-    if (hw_5v_ref) {
-        ADMUX = _BV(REFS0) | 0;
-    } else {
-        ADMUX = 0;
-    }
-
-    ADC_DDR  &= ~_BV(0);
-    ADC_PORT &= ~_BV(0);
-    DIDR0 |= _BV(0);
-    ADCSRB =    _BV(ADTS2) |
-                _BV(ADTS1) |
-                _BV(ADTS0);  
-    ADCSRA =    _BV(ADEN) |
-                _BV(ADSC) |
-                _BV(ADATE)|
-                _BV(ADIE) |
-                _BV(ADPS2);
-
-    AFSK_DAC_INIT();
-    LED_TX_INIT();
-    LED_RX_INIT();
+namespace AFSKADCINIT{
+
+	void AFSK_hw_init(void) {
+		// Set up ADC
+
+		AFSK_hw_refDetect();
+
+		TCCR1A = 0;                                    
+		TCCR1B = _BV(CS10) | _BV(WGM13) | _BV(WGM12);
+		ICR1 = (((CPU_FREQ+FREQUENCY_CORRECTION)) / 9600) - 1;
+
+		if (hw_5v_ref) {
+			ADMUX = _BV(REFS0) | 0;
+		} else {
+			ADMUX = 0;
+		}
+
+		ADC_DDR  &= ~_BV(0);
+		ADC_PORT &= ~_BV(0);
+		DIDR0 |= _BV(0);
+		ADCSRB =    _BV(ADTS2) |
+					_BV(ADTS1) |
+					_BV(ADTS0);  
+		ADCSRA =    _BV(ADEN) |
+					_BV(ADSC) |
+					_BV(ADATE)|
+					_BV(ADIE) |
+					_BV(ADPS2);
+
+		AFSK_DAC_INIT();
+		LED_TX_INIT();
+		LED_RX_INIT();
+	}
 }
 
 void AFSK_init(Afsk *afsk) {
@@ -73,7 +77,7 @@ void AFSK_init(Afsk *afsk) {
         fifo_push(&afsk->delayFifo, 0);
     }
 
-    AFSK_hw_init();
+    AFSKADCINIT::AFSK_hw_init();
 
 }
 
@@ -211,6 +215,8 @@ static bool hdlcParse(Hdlc *hdlc, bool bit, FIFOBuffer *fifo) {
             ret = false;
             hdlc->receiving = false;
             LED_RX_OFF();
+			fullBfrErr=true; 
+
         }
 
         // Everytime we receive a HDLC_FLAG, we reset the

LibAPRS/AFSK.h

@@ -10,6 +10,9 @@
 #include "HDLC.h"
 
 #define SIN_LEN 512
+namespace AFSKADCINIT {
+	void AFSK_hw_init(void);
+}; 
 static const uint8_t sin_table[] PROGMEM =
 {
     128, 129, 131, 132, 134, 135, 137, 138, 140, 142, 143, 145, 146, 148, 149, 151,

LibAPRS/AX25.cpp

@@ -15,6 +15,7 @@
 
 extern int LibAPRS_vref;
 extern bool LibAPRS_open_squelch;
+bool CRC_Err=false; 
 
 void ax25_init(AX25Ctx *ctx, ax25_callback_t hook) {
     memset(ctx, 0, sizeof(*ctx));
@@ -70,6 +71,8 @@ void ax25_poll(AX25Ctx *ctx) {
                         LED_RX_ON();
                     }
                     ax25_decode(ctx);
+                }else{
+                     CRC_Err=true;
                 }
             }
             ctx->sync = true;

LibAPRS/LibAPRS.cpp

@@ -4,14 +4,15 @@
 
 Afsk modem;
 AX25Ctx AX25;
-extern void aprs_msg_callback(struct AX25Msg *msg);
+extern void aprs_msg_callback(struct AX25Msg *msg); 
 #define countof(a) sizeof(a)/sizeof(a[0])
 
 int LibAPRS_vref = REF_3V3;
 bool LibAPRS_open_squelch = false;
 
 unsigned long custom_preamble = 350UL;
 unsigned long custom_tail = 50UL;
+char dataID_Flag; // '!' no messaging; '=' messaging va7ta update
 
 AX25Call src;
 AX25Call dst;
@@ -121,6 +122,10 @@ void APRS_setTail(unsigned long tail) {
     custom_tail = tail;
 }
 
+void APRS_setDataTypeID(uint8_t flag) {//va7ta update
+    dataID_Flag = flag;//va7ta update
+}//va7ta update
+
 void APRS_useAlternateSymbolTable(bool use) {
     if (use) {
         symbolTable = '\\';
@@ -228,7 +233,7 @@ void APRS_sendLoc(void *_buffer, size_t length) {
     }
     uint8_t *packet = (uint8_t*)malloc(payloadLength);
     uint8_t *ptr = packet;
-    packet[0] = '=';
+    packet[0] = dataID_Flag; //'!'or'='//va7ta update
     packet[9] = symbolTable;
     packet[19] = symbol;
     ptr++;

LibAPRS/LibAPRS.h

@@ -19,7 +19,9 @@ void APRS_setPath2(char *call, int ssid);
 
 void APRS_setPreamble(unsigned long pre);
 void APRS_setTail(unsigned long tail);
-void APRS_useAlternateSymbolTable(bool use);
+void APRS_useAlternateSymbolTable(bool use); 
+void APRS_setDataTypeID(uint8_t flag);
+
 void APRS_setSymbol(char sym);
 
 void APRS_setLat(char *lat);

LibAPRS/examples/Basic_usage/Basic_usage.ino

@@ -11,6 +11,10 @@
 // OR
 //#define ADC_REFERENCE REF_5V
 
+// '!'(33) for no messaging; '='(61)if APRS messaging available
+#define APRS_DATA_TYPE_FLAG '=' 
+
+// Note some squelch delays are too short for catching APRS packets.
 // You can also define whether your modem will be
 // running with an open squelch radio:
 #define OPEN_SQUELCH false
@@ -29,8 +33,13 @@
 // from your main loop, like this:
 
 boolean gotPacket = false;
+extern boolean fullBfrErr;//used for flagging data errors
+extern boolean CRC_Err;//used for flagging data errors
 AX25Msg incomingPacket;
 uint8_t *packetData;
+
+using namespace AFSKADCINIT;//provides access for re-initializing ADC for AFSK decoding
+
 void aprs_msg_callback(struct AX25Msg *msg) {
   // If we already have a packet waiting to be
   // processed, we must drop the new one.
@@ -109,6 +118,8 @@ void locationUpdateExample() {
   APRS_setHeight(4);
   APRS_setGain(7);
   APRS_setDirectivity(0);
+  APRS_setDataTypeID(APRS_DATA_TYPE_FLAG);//flags if APRS messaging is available 
+
 
   // We'll define a comment string
   char *comment = "LibAPRS location update";
@@ -164,6 +175,14 @@ void processPacket() {
 boolean whichExample = false;
 void loop() {
 
+  /*   
+   *  insert this statement immediately after using the ADC for 
+   *  other possible functions such as measuring a voltage from 
+   *  a sensor. This is needed to re-configure the ADC for AFSK 
+   *  decoding.
+   */  
+   // AFSKADCINIT::AFSK_hw_init();// re-initialize AFSK operation
+
   delay(1000);
   if (whichExample) {
     locationUpdateExample();
@@ -174,4 +193,14 @@ void loop() {
 
   delay(500);
   processPacket();
-}
+       // monitor packet data errors - Note: cannot be used with open squelch
+    if(CRC_Err==true){
+          Serial.println(F("CRC_Error"));
+          CRC_Err=false;
+    }
+    // Flag any buffer overrun errors
+    if(fullBfrErr==true){ 
+          Serial.println(F("FullBufferError"));
+          fullBfrErr=false;
+    }
+}