Add display/adjustment of the squelch level

README.md

@@ -88,6 +88,7 @@ is up) with the following info:
   - `S meter`: periodically refreshed S meter value, OVF is displayed on
     overflow
   - `rfg`: RF gain in percent
+  - `sql`: squelch level in percent
 
 - Second status bar line:
   - `state`: RX/TX/TUNE depending on the PTT status
@@ -143,6 +144,7 @@ Some basic CAT control hotkeys are also supported:
 - `[`, `]`: decreases, increases frequency
 - `{`, `}`: decreases, increases tuning step
 - `;`, `'`: decreases, increases RF gain
+- `,`, `.`: decreases, increases squelch level
 - `n`, `m`: cycles through operating modes
 - `d`, `f`: cycles through filters
 - `D`: toggles data mode

civcontrol.go

@@ -74,6 +74,7 @@ type civControlStruct struct {
 		tune             bool
 		pwrPercent       int
 		rfGainPercent    int
+		sqlPercent       int
 		operatingModeIdx int
 		filterIdx        int
 		dataMode         bool
@@ -108,7 +109,7 @@ func (s *civControlStruct) decode(d []byte) {
 	case 0x1a:
 		s.decodeDataModeAndOVF(payload)
 	case 0x14:
-		s.decodePowerAndRFGain(payload)
+		s.decodePowerRFGainSquelch(payload)
 	case 0x1c:
 		s.decodeTransmitStatus(payload)
 	case 0x15:
@@ -250,7 +251,7 @@ func (s *civControlStruct) decodeDataModeAndOVF(d []byte) {
 	}
 }
 
-func (s *civControlStruct) decodePowerAndRFGain(d []byte) {
+func (s *civControlStruct) decodePowerRFGainSquelch(d []byte) {
 	if len(d) < 3 {
 		return
 	}
@@ -260,6 +261,10 @@ func (s *civControlStruct) decodePowerAndRFGain(d []byte) {
 		hex := uint16(d[1])<<8 | uint16(d[2])
 		s.state.rfGainPercent = int(math.Round((float64(hex) / 0x0255) * 100))
 		statusLog.reportRFGain(s.state.rfGainPercent)
+	case 0x03:
+		hex := uint16(d[1])<<8 | uint16(d[2])
+		s.state.sqlPercent = int(math.Round((float64(hex) / 0x0255) * 100))
+		statusLog.reportSQL(s.state.sqlPercent)
 	case 0x0a:
 		hex := uint16(d[1])<<8 | uint16(d[2])
 		s.state.pwrPercent = int(math.Round((float64(hex) / 0x0255) * 100))
@@ -393,6 +398,25 @@ func (s *civControlStruct) decRFGain() error {
 	return nil
 }
 
+func (s *civControlStruct) setSQL(percent int) error {
+	v := uint16(0x0255 * (float64(percent) / 100))
+	return s.st.send([]byte{254, 254, civAddress, 224, 0x14, 0x03, byte(v >> 8), byte(v & 0xff), 253})
+}
+
+func (s *civControlStruct) incSQL() error {
+	if s.state.sqlPercent < 100 {
+		return s.setSQL(s.state.sqlPercent + 1)
+	}
+	return nil
+}
+
+func (s *civControlStruct) decSQL() error {
+	if s.state.sqlPercent > 0 {
+		return s.setSQL(s.state.sqlPercent - 1)
+	}
+	return nil
+}
+
 func (s *civControlStruct) getDigit(v uint, n int) byte {
 	f := float64(v)
 	for n > 0 {
@@ -605,6 +629,10 @@ func (s *civControlStruct) getRFGain() error {
 	return s.st.send([]byte{254, 254, civAddress, 224, 0x14, 0x02, 253})
 }
 
+func (s *civControlStruct) getSQL() error {
+	return s.st.send([]byte{254, 254, civAddress, 224, 0x14, 0x03, 253})
+}
+
 func (s *civControlStruct) loop() {
 	for {
 		select {
@@ -657,6 +685,9 @@ func (s *civControlStruct) init(st *serialStream) error {
 	if err := s.getRFGain(); err != nil {
 		return err
 	}
+	if err := s.getSQL(); err != nil {
+		return err
+	}
 
 	s.deinitNeeded = make(chan bool)
 	s.deinitFinished = make(chan bool)

hotkeys.go

@@ -36,6 +36,18 @@ func handleHotkey(k byte) {
 				log.Error("can't decrease rf gain: ", err)
 			}
 		}
+	case '.':
+		if civControl != nil {
+			if err := civControl.incSQL(); err != nil {
+				log.Error("can't increase sql: ", err)
+			}
+		}
+	case ',':
+		if civControl != nil {
+			if err := civControl.decSQL(); err != nil {
+				log.Error("can't decrease sql: ", err)
+			}
+		}
 	case ']':
 		if civControl != nil {
 			if err := civControl.incFreq(); err != nil {

statuslog.go

@@ -24,6 +24,7 @@ type statusLogData struct {
 	vd        string
 	txPower   string
 	rfGain    string
+	sql       string
 	s         string
 	ovf       bool
 	ts        string
@@ -239,6 +240,16 @@ func (s *statusLogStruct) reportRFGain(percent int) {
 	s.data.rfGain = fmt.Sprint(percent, "%")
 }
 
+func (s *statusLogStruct) reportSQL(percent int) {
+	s.mutex.Lock()
+	defer s.mutex.Unlock()
+
+	if s.data == nil {
+		return
+	}
+	s.data.sql = fmt.Sprint(percent, "%")
+}
+
 func (s *statusLogStruct) clearInternal() {
 	fmt.Printf("%c[2K", 27)
 }
@@ -281,7 +292,11 @@ func (s *statusLogStruct) update() {
 	if s.data.rfGain != "" {
 		rfGainStr = " rfg " + s.data.rfGain
 	}
-	s.data.line1 = fmt.Sprint(s.data.s, ovfStr, rfGainStr)
+	var sqlStr string
+	if s.data.sql != "" {
+		sqlStr = " sql " + s.data.sql
+	}
+	s.data.line1 = fmt.Sprint(s.data.s, ovfStr, rfGainStr, sqlStr)
 
 	var tsStr string
 	if s.data.ts != "" {