Add hotkey for switching between VFO A/B

README.md

@@ -160,6 +160,7 @@ Some basic CAT control hotkeys are also supported:
 - `v`, `b`: cycles through bands
 - `p`: toggles preamp
 - `a`: toggles AGC
+- `o`: toggles VFO A/B
 
 ## Icom IC-705 Wi-Fi notes
 

civcontrol.go

@@ -97,6 +97,7 @@ type civControlStruct struct {
 		setAGCSent       bool
 		setNREnabledSent bool
 		setTSSent        bool
+		setVFOSent       bool
 
 		freq             uint
 		ptt              bool
@@ -115,6 +116,7 @@ type civControlStruct struct {
 		agc              int
 		tsValue          byte
 		ts               uint
+		vfoBActive       bool
 	}
 }
 
@@ -141,6 +143,8 @@ func (s *civControlStruct) decode(d []byte) bool {
 		return s.decodeFreq(payload)
 	case 0x06:
 		return s.decodeMode(payload)
+	case 0x07:
+		return s.decodeVFO(payload)
 	case 0x10:
 		return s.decodeTS(payload)
 	case 0x1a:
@@ -237,6 +241,29 @@ func (s *civControlStruct) decodeMode(d []byte) bool {
 	return true
 }
 
+func (s *civControlStruct) decodeVFO(d []byte) bool {
+	if len(d) < 1 {
+		return !s.state.setVFOSent
+	}
+
+	if d[0] == 1 {
+		s.state.vfoBActive = true
+		log.Print("active vfo: B")
+	} else {
+		s.state.vfoBActive = false
+		log.Print("active vfo: A")
+	}
+
+	if s.state.setVFOSent {
+		// The radio does not send the VFO's frequency automatically.
+		_ = s.getFreq()
+
+		s.state.setVFOSent = false
+		return false
+	}
+	return true
+}
+
 func (s *civControlStruct) decodeTS(d []byte) bool {
 	if len(d) < 1 {
 		return !s.state.setTSSent
@@ -820,6 +847,15 @@ func (s *civControlStruct) decTS() error {
 	return s.st.send([]byte{254, 254, civAddress, 224, 0x10, b, 253})
 }
 
+func (s *civControlStruct) toggleVFO() error {
+	s.state.setVFOSent = true
+	var b byte
+	if !s.state.vfoBActive {
+		b = 1
+	}
+	return s.st.send([]byte{254, 254, civAddress, 224, 0x07, b, 253})
+}
+
 func (s *civControlStruct) getFreq() error {
 	s.state.getFreqSent = true
 	return s.st.send([]byte{254, 254, civAddress, 224, 3, 253})

hotkeys.go

@@ -212,6 +212,12 @@ func handleHotkey(k byte) {
 				log.Error("can't change agc: ", err)
 			}
 		}
+	case 'o':
+		if civControl != nil {
+			if err := civControl.toggleVFO(); err != nil {
+				log.Error("can't change vfo: ", err)
+			}
+		}
 	case '\n':
 		if statusLog.isRealtime() {
 			statusLog.mutex.Lock()