Add RF gain display/adjustment

README.md

@@ -87,6 +87,7 @@ is up) with the following info:
 - First status bar line:
   - `S meter`: periodically refreshed S meter value, OVF is displayed on
     overflow
+  - `rfg`: RF gain in percent
 
 - Second status bar line:
   - `state`: RX/TX/TUNE depending on the PTT status

civcontrol.go

@@ -73,6 +73,7 @@ type civControlStruct struct {
 		ptt              bool
 		tune             bool
 		pwrPercent       int
+		rfGainPercent    int
 		operatingModeIdx int
 		filterIdx        int
 		dataMode         bool
@@ -107,7 +108,7 @@ func (s *civControlStruct) decode(d []byte) {
 	case 0x1a:
 		s.decodeDataModeAndOVF(payload)
 	case 0x14:
-		s.decodePower(payload)
+		s.decodePowerAndRFGain(payload)
 	case 0x1c:
 		s.decodeTransmitStatus(payload)
 	case 0x15:
@@ -249,16 +250,22 @@ func (s *civControlStruct) decodeDataModeAndOVF(d []byte) {
 	}
 }
 
-func (s *civControlStruct) decodePower(d []byte) {
-	if len(d) < 3 || d[0] != 0x0a {
+func (s *civControlStruct) decodePowerAndRFGain(d []byte) {
+	if len(d) < 3 {
 		return
 	}
 
+	switch d[0] {
+	case 0x02:
+		hex := uint16(d[1])<<8 | uint16(d[2])
+		s.state.rfGainPercent = int(math.Round((float64(hex) / 0x0255) * 100))
+		statusLog.reportRFGain(s.state.rfGainPercent)
+	case 0x0a:
 		hex := uint16(d[1])<<8 | uint16(d[2])
 		s.state.pwrPercent = int(math.Round((float64(hex) / 0x0255) * 100))
-
 		statusLog.reportTxPower(s.state.pwrPercent)
 	}
+}
 
 func (s *civControlStruct) decodeTransmitStatus(d []byte) {
 	if len(d) < 2 {
@@ -367,6 +374,25 @@ func (s *civControlStruct) decPwr() error {
 	return nil
 }
 
+func (s *civControlStruct) setRFGain(percent int) error {
+	v := uint16(0x0255 * (float64(percent) / 100))
+	return s.st.send([]byte{254, 254, civAddress, 224, 0x14, 0x02, byte(v >> 8), byte(v & 0xff), 253})
+}
+
+func (s *civControlStruct) incRFGain() error {
+	if s.state.rfGainPercent < 100 {
+		return s.setRFGain(s.state.rfGainPercent + 1)
+	}
+	return nil
+}
+
+func (s *civControlStruct) decRFGain() error {
+	if s.state.rfGainPercent > 0 {
+		return s.setRFGain(s.state.rfGainPercent - 1)
+	}
+	return nil
+}
+
 func (s *civControlStruct) getDigit(v uint, n int) byte {
 	f := float64(v)
 	for n > 0 {
@@ -575,6 +601,10 @@ func (s *civControlStruct) getTS() error {
 	return s.st.send([]byte{254, 254, civAddress, 224, 0x10, 253})
 }
 
+func (s *civControlStruct) getRFGain() error {
+	return s.st.send([]byte{254, 254, civAddress, 224, 0x14, 0x02, 253})
+}
+
 func (s *civControlStruct) loop() {
 	for {
 		select {
@@ -624,6 +654,9 @@ func (s *civControlStruct) init(st *serialStream) error {
 	if err := s.getTS(); err != nil {
 		return err
 	}
+	if err := s.getRFGain(); err != nil {
+		return err
+	}
 
 	s.deinitNeeded = make(chan bool)
 	s.deinitFinished = make(chan bool)

hotkeys.go

@@ -24,6 +24,18 @@ func handleHotkey(k byte) {
 				log.Error("can't decrease power: ", err)
 			}
 		}
+	case '\'':
+		if civControl != nil {
+			if err := civControl.incRFGain(); err != nil {
+				log.Error("can't increase rf gain: ", err)
+			}
+		}
+	case ';':
+		if civControl != nil {
+			if err := civControl.decRFGain(); err != nil {
+				log.Error("can't decrease rf gain: ", err)
+			}
+		}
 	case ']':
 		if civControl != nil {
 			if err := civControl.incFreq(); err != nil {

statuslog.go

@@ -23,6 +23,7 @@ type statusLogData struct {
 	preamp    string
 	vd        string
 	txPower   string
+	rfGain    string
 	s         string
 	ovf       bool
 	ts        string
@@ -228,6 +229,16 @@ func (s *statusLogStruct) reportTxPower(percent int) {
 	s.data.txPower = fmt.Sprint(percent, "%")
 }
 
+func (s *statusLogStruct) reportRFGain(percent int) {
+	s.mutex.Lock()
+	defer s.mutex.Unlock()
+
+	if s.data == nil {
+		return
+	}
+	s.data.rfGain = fmt.Sprint(percent, "%")
+}
+
 func (s *statusLogStruct) clearInternal() {
 	fmt.Printf("%c[2K", 27)
 }
@@ -266,7 +277,11 @@ func (s *statusLogStruct) update() {
 	if s.data.ovf {
 		ovfStr = " " + s.preGenerated.ovf
 	}
-	s.data.line1 = fmt.Sprint(s.data.s, ovfStr)
+	var rfGainStr string
+	if s.data.rfGain != "" {
+		rfGainStr = " rfg " + s.data.rfGain
+	}
+	s.data.line1 = fmt.Sprint(s.data.s, ovfStr, rfGainStr)
 
 	var tsStr string
 	if s.data.ts != "" {