Updated to allow receiving (via serial) a mode command from the Raduino,

and then using that to set rigMode.  Note that it doesn't actually do
anything beyond that, at the moment, but I *think* this will allow PTT
events to be pressed in CW mode (as CW key down).

audio.ino

@@ -76,6 +76,8 @@ void audioInit()
   //audioCtrl.dacVolume(1.0, 0.0);  // we're going to mute TX audio via the DAC unless we're transmitting
 
   audioSelectTxInput(TX_MIC_IN); // superfluous I think
+
+  audioCWFilterNarrow(); // test
 }
 
 inline void updateRxRigIn()
@@ -538,6 +540,17 @@ void audioCalibrate(IOPConfig* c, char cmd, char subcmd, char parm, float value,
   }  
 }
 
+int updateFilter[5];
+
+void audioCWFilterNarrow()
+{
+  audioCtrl.audioPreProcessorEnable();
+  // calcBiquad(FilterType,FrequencyC,dBgain,Q,QuantizationUnit,SampleRate,int*);
+  calcBiquad(FILTER_BANDPASS, 700, 0, 2, 524288, 44100, updateFilter);
+  audioCtrl.eqFilter(0, updateFilter);
+  audioCtrl.eqFilter(1, updateFilter);
+}
+
 //======================================================================
 // EOF
 //======================================================================

cat.ino

@@ -10,6 +10,11 @@
 #define EEPROM_READ_PREFIX 0xE0
 #define EEPROM_WRITE_PREFIX 0xF0
 
+#define IOP_MODE_COMMAND  0x00
+#define IOP_MODE_SSB      0x01
+#define IOP_MODE_DIGI     0x02
+#define IOP_MODE_CW       0x03
+
 //======================================================================
 // CAT from PC-to-IOP
 //
@@ -44,6 +49,17 @@ void initCAT(long baud, int portConfig)
 
 void processIOPCommand(const byte* buf, int len)
 {
+  if (len > 0) {
+    switch(buf[0]) {
+      case IOP_MODE_COMMAND:
+      if (len < 2) {
+        return;
+      } else {
+        rigMode = RigMode(buf[1]);
+      }
+      break;
+    }
+  }
 }
 
 //======================================================================

config.h

@@ -8,7 +8,7 @@
 // Uncomment to use the "factory" calibration mode.  This is intended to
 // allow calibration of IOP settings, separately from the uBITX/Raduino.
 // There will be no pass-thru of any CAT.
-#define FACTORY_CALIBRATION
+//#define FACTORY_CALIBRATION
 
 // IOPConfig
 // Used to store configuration parameters during runtime, as well as to

ubitx_iop.ino

@@ -87,6 +87,25 @@ void setup() {
   audioInit();
 }
 
+//======================================================================
+
+void setRigMode(RigMode m) 
+{
+  rigMode = m;
+  switch(rigMode) {
+    case MODE_SSB:
+    break;
+
+    case MODE_DIGI:
+    break;
+    
+    case MODE_CW:
+    break;
+  }
+}
+
+//======================================================================
+
 void loop() {  
   elapsedMillis frame_timer = 0;