feat: Implemented UDP Outbound Adif message, freq to pstrotator

internal/cat/civ/civ.go

@@ -45,6 +45,15 @@ const (
 	CmdATU    = 0x1C // sub 0x01 = antenna tuner (0x00 off, 0x01 through, 0x02 tune)
 	CmdScope  = 0x27 // spectrum-scope waveform stream (sub 0x00 = data, 0x11 = on/off)
 	CmdRIT    = 0x21 // RIT/ΔTX: sub 0x00 offset freq, 0x01 RIT on/off, 0x02 ΔTX(XIT) on/off
+	CmdSendCW = 0x17 // send a CW message (ASCII, ≤30 chars) via the rig's keyer; data 0xFF = stop
+
+	SubLevelKeySpeed = 0x0C // CmdLevel: CW keying speed (0-255 → KeyMinWPM..KeyMaxWPM)
+
+	// CW keyer speed range for the KEY SPEED level (IC-7610: 6-48 WPM).
+	KeyMinWPM = 6
+	KeyMaxWPM = 48
+
+	StopCWByte = 0xFF // 0x17 data byte that stops an in-progress CW message
 
 	SubRITFreq = 0x00 // RIT/ΔTX offset: 2 BCD bytes (LE, 0-9999) + sign byte (00 +, 01 -)
 	SubRITOn   = 0x01 // RIT on/off (00/01)
@@ -85,6 +94,14 @@ const (
 	SubSwNB     = 0x22 // noise blanker on/off
 	SubSwNR     = 0x40 // noise reduction on/off
 	SubSwANF    = 0x41 // auto-notch on/off
+	SubSwBreakIn = 0x47 // CW break-in: 0=OFF, 1=SEMI, 2=FULL (needed so 0x17 CW keys TX)
+)
+
+// CW break-in modes (CmdSwitch 0x47).
+const (
+	BreakInOff  = 0
+	BreakInSemi = 1
+	BreakInFull = 2
 )
 
 // Icom mode codes (used by CmdReadMode / CmdSetMode).
@@ -191,6 +208,51 @@ func BCDToRIT(b []byte) int {
 	return v
 }
 
+// WPMToKeyLevel maps a CW speed in words-per-minute to the 0-255 value the KEY
+// SPEED level (CmdLevel 0x0C) expects, linear across KeyMinWPM..KeyMaxWPM.
+func WPMToKeyLevel(wpm int) int {
+	if wpm < KeyMinWPM {
+		wpm = KeyMinWPM
+	}
+	if wpm > KeyMaxWPM {
+		wpm = KeyMaxWPM
+	}
+	return (wpm - KeyMinWPM) * 255 / (KeyMaxWPM - KeyMinWPM)
+}
+
+// KeyLevelToWPM is the inverse of WPMToKeyLevel (0-255 → WPM).
+func KeyLevelToWPM(v int) int {
+	if v < 0 {
+		v = 0
+	}
+	if v > 255 {
+		v = 255
+	}
+	return KeyMinWPM + (v*(KeyMaxWPM-KeyMinWPM)+127)/255
+}
+
+// CWText is the set of characters the rig's keyer accepts (command 0x17).
+// Everything else is dropped. Space keys a word gap.
+const CWText = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 /?.,-=+@:"
+
+// FilterCW upper-cases text and keeps only keyer-legal characters.
+func FilterCW(text string) string {
+	out := make([]byte, 0, len(text))
+	for i := 0; i < len(text); i++ {
+		c := text[i]
+		if c >= 'a' && c <= 'z' {
+			c -= 32
+		}
+		for j := 0; j < len(CWText); j++ {
+			if CWText[j] == c {
+				out = append(out, c)
+				break
+			}
+		}
+	}
+	return string(out)
+}
+
 // ByteToBCD / BCDToByte handle a single packed-BCD byte (used by the
 // attenuator, where the value is dB: 0x00, 0x06, 0x12, 0x18…).
 func ByteToBCD(v int) byte {