Event Channel and PORTB int1 bug fix:

1. Use event CH2 for timer resetting

2.  Can not sniff the second round of traffic due to the PORTB int1 was disabled in CardSniffInit(). This is reenabled in ReaderSniffInit

(cherry picked from commit 24b87e2)

Firmware/Chameleon-Mini/Codec/Codec.h

@@ -146,6 +146,9 @@ INLINE void CodecInitCommon(void)
     EVSYS.CH0MUX = CODEC_DEMOD_IN_EVMUX0;
     EVSYS.CH1MUX = CODEC_DEMOD_IN_EVMUX1;
 
+    EVSYS.CH2MUX = CODEC_DEMOD_IN_EVMUX0;
+
+
     /* Configure loadmod pin configuration and use a virtual port configuration
      * for single instruction cycle access */
     CODEC_LOADMOD_PORT.DIRSET = CODEC_LOADMOD_MASK;
@@ -187,6 +190,8 @@ INLINE void CodecInitCommon(void)
     /* Configure Analog Comparator 1 to detect SOC */
     ACA.AC1MUXCTRL = AC_MUXPOS_DAC_gc | AC_MUXNEG_PIN7_gc;
     ACA.AC1CTRL = CODEC_AC_DEMOD_SETTINGS;
+
+
 }
 
 INLINE void CodecSetSubcarrier(SubcarrierModType ModType, uint16_t Divider)

Firmware/Chameleon-Mini/Codec/SniffISO14443-2A.c

@@ -76,6 +76,22 @@ static volatile enum {
 
 void ReaderSniffInit(void)
 {
+
+    // Common Codec Register settings
+//    CodecInitCommon();
+
+
+    // Configure interrupt for demod
+    // This was disabled in CardSniffInit()
+    CODEC_DEMOD_IN_PORT.INTCTRL = PORT_INT1LVL_HI_gc;
+
+
+    // Enable demodulator power
+//    CodecSetDemodPower(true);
+
+
+    TrafficSource = TRAFFIC_READER;
+
     /* Initialize some global vars and start looking out for reader commands */
     Flags.DemodFinished = 0;
 
@@ -408,6 +424,7 @@ ISR(TCD1_CCB_vect) // EOC found
 
 INLINE void CardSniffInit(void)
 {
+    TrafficSource = TRAFFIC_CARD;
 
     ////////////////////////////
     // Same as reader init
@@ -530,6 +547,7 @@ INLINE void CardSniffDeinit(void)
 
     EVSYS.CH2MUX = 0; // on every ACA_AC1 INT
     EVSYS.CH2CTRL = 0;
+    ACA.AC0MUXCTRL = AC_MUXPOS_DAC_gc | AC_MUXNEG_PIN7_gc;
     ACA.AC0CTRL = CODEC_AC_DEMOD_SETTINGS;
 
 
@@ -548,10 +566,9 @@ INLINE void CardSniffDeinit(void)
 
 void Sniff14443ACodecInit(void)
 {
-    Flags.DemodFinished = 0;
+//    Flags.DemodFinished = 0;
 
-    SniffEnable = true;
-    TrafficSource = TRAFFIC_READER;
+//    SniffEnable = true;
 
     // Common Codec Register settings
     CodecInitCommon();
@@ -570,9 +587,10 @@ void Sniff14443ACodecInit(void)
 
 void Sniff14443ACodecDeInit(void)
 {
-    SniffEnable = false;
+//    SniffEnable = false;
     CardSniffDeinit();
     ReaderSniffDeInit();
+    CodecSetDemodPower(false);
 }
 
 
@@ -590,18 +608,17 @@ void Sniff14443ACodecTask(void)
                 LogEntry(LOG_INFO_CODEC_RX_DATA, CodecBuffer, (DemodBitCount+7)/8);
                 LEDHook(LED_CODEC_RX, LED_PULSE);
 
-                if(SniffEnable == true){
-                    // TODO: Start interrupt for finding Card -> Reader direction traffic
+//                if(SniffEnable == true){
+                // TODO: Start interrupt for finding Card -> Reader direction traffic
 
-                    ReaderSniffDeInit();
-                    CardSniffInit();
+                ReaderSniffDeInit();
+                CardSniffInit();
 
 //                    ISO14443ACodecDeInit();
 
 //                    TestSniff14443ACodecInit();
-                    TrafficSource = TRAFFIC_CARD;
-                    return;
-                }
+                return;
+//                }
             }
 //
 //                /* No data to be processed. Disable loadmodding and start listening again */
@@ -691,10 +708,12 @@ void Sniff14443ACodecTask(void)
 
 //                    LED_PORT.OUTCLR = LED_RED;
                     CardSniffDeinit();
+//                    TrafficSource = TRAFFIC_READER;
                     ReaderSniffInit();
+//                    Sniff14443ACodecInit();
+//                    ReaderSniffInit();
 //                    Reader14443ACodecDeInit();
 //                    ISO14443ACodecInit();
-                    TrafficSource = TRAFFIC_READER;
 
                     return;
 //                }