fallback to the frequency when direct band switching is not supported…

… by the radio

core/hamlib/hamlib.go

@@ -5,6 +5,7 @@ import (
 	"log"
 	"time"
 
+	"github.com/ftl/hamradio"
 	"github.com/ftl/hamradio/bandplan"
 	"github.com/ftl/rigproxy/pkg/client"
 
@@ -183,22 +184,44 @@ func (c *Client) SetBand(band core.Band) {
 	if band == c.outgoing.band {
 		return
 	}
-	c.outgoing.band = band
+	if c.conn == nil || c.conn.Closed() {
+		return
+	}
 
-	outgoingBandName := toBandplanBandName(c.outgoing.band)
+	outgoingBandName := toBandplanBandName(band)
 	outgoingBand, ok := c.bandplan[outgoingBandName]
 	if !ok {
-		log.Printf("unknown band %v", c.outgoing.band)
+		log.Printf("unknown band %v", band)
 		return
 	}
-	if c.conn == nil || c.conn.Closed() {
+	c.outgoing.band = band
+	log.Printf("outgoing band: %v", band)
+
+	err := c.switchToBand(outgoingBand)
+	if err == nil {
 		return
 	}
+	log.Printf("cannot switch to band %s directly: %v", outgoingBand, err)
+
+	err = c.switchToBandByFrequencyAndMode(outgoingBand)
+	if err != nil {
+		log.Printf("cannot switch to band %s by frequency: %v", band, err)
+		return
+	}
+}
+
+func (c *Client) switchToBand(band bandplan.Band) error {
 	ctx, cancel := c.withRequestTimeout()
 	defer cancel()
-	c.conn.SwitchToBand(ctx, outgoingBand)
+	return c.conn.SwitchToBand(ctx, band)
+}
 
-	log.Printf("outgoing band: %v", band)
+func (c *Client) switchToBandByFrequencyAndMode(band bandplan.Band) error {
+	frequency := findModePortionCenter(c.bandplan, int(band.Center()), toBandplanMode(c.incoming.mode))
+
+	ctx, cancel := c.withRequestTimeout()
+	defer cancel()
+	return c.conn.SetFrequency(ctx, client.Frequency(frequency))
 }
 
 func (c *Client) SetMode(mode core.Mode) {
@@ -355,3 +378,43 @@ func toClientMode(mode core.Mode) client.Mode {
 		return client.ModeNone
 	}
 }
+
+func toBandplanMode(mode core.Mode) bandplan.Mode {
+	log.Printf("to bandplan mode: %s", mode)
+	switch mode {
+	case core.ModeCW:
+		return bandplan.ModeCW
+	case core.ModeSSB, core.ModeFM:
+		return bandplan.ModePhone
+	case core.ModeDigital, core.ModeRTTY:
+		return bandplan.ModeDigital
+	default:
+		return bandplan.ModeDigital
+	}
+}
+
+func findModePortionCenter(bp bandplan.Bandplan, f int, mode bandplan.Mode) int {
+	log.Printf("find mode portion center: %d %s", f, mode)
+	frequency := hamradio.Frequency(f)
+	band := bp.ByFrequency(frequency)
+	var modePortion bandplan.Portion
+	var currentPortion bandplan.Portion
+	for _, portion := range band.Portions {
+		if (portion.Mode == mode && portion.From < frequency) || modePortion.Mode != mode {
+			modePortion = portion
+		}
+		if portion.Contains(frequency) {
+			currentPortion = portion
+		}
+		if modePortion.Mode == mode && currentPortion.Mode != "" {
+			break
+		}
+	}
+	if currentPortion.Mode == mode {
+		return int(currentPortion.Center())
+	}
+	if modePortion.Mode == mode {
+		return int(modePortion.Center())
+	}
+	return int(band.Center())
+}

go.mod

@@ -24,7 +24,7 @@ require (
 	github.com/ftl/conval v0.5.0
 	github.com/ftl/gmtry v0.0.0-20201120192810-fa4a1b99fc04
 	github.com/ftl/hamradio v0.2.7
-	github.com/ftl/rigproxy v0.2.1
+	github.com/ftl/rigproxy v0.2.2
 	github.com/ftl/tci v0.3.2
 	github.com/golang/protobuf v1.5.2
 	github.com/gotk3/gotk3 v0.6.1

go.sum

@@ -14,8 +14,8 @@ github.com/ftl/hamradio v0.2.7 h1:AXg5JI6oPaSvO/YfM7kwAweVP49EF/zaEBiY+cxYDMI=
 github.com/ftl/hamradio v0.2.7/go.mod h1:BvA+ni3sOKmrIJpLt6f2sYK9vc3VfihZm4x0h8kzOPw=
 github.com/ftl/localcopy v0.0.0-20190616142648-8915fb81f0d9 h1:ORI3EUKpLTsfA372C6xpuZFDXw+ckmCzLaCcJvakG24=
 github.com/ftl/localcopy v0.0.0-20190616142648-8915fb81f0d9/go.mod h1:4sZLCxjgn++exy5u0muVzlvnahfanPuiHLQo0GJQnPA=
-github.com/ftl/rigproxy v0.2.1 h1:NenPHHvWMi6EpZUYOINd8Gsvl+zoSQWc+q5Ha/yUsbE=
-github.com/ftl/rigproxy v0.2.1/go.mod h1:PrBUiqLwu/6zL44+uOz4lgmOfnis4FIvJDhxDNXoi60=
+github.com/ftl/rigproxy v0.2.2 h1:01+7fhn0xqToFJxsAHO1N/JNs1Q5I38yT7/lF43AExI=
+github.com/ftl/rigproxy v0.2.2/go.mod h1:PrBUiqLwu/6zL44+uOz4lgmOfnis4FIvJDhxDNXoi60=
 github.com/ftl/tci v0.3.2 h1:1Qdgprldiv7/DQvuK96OHMVqb+SDunqbxTHDcWsE5Tk=
 github.com/ftl/tci v0.3.2/go.mod h1:3B8x8FI/kBbUwbWnz725tTiiiNfJpIL9cQ67TnjW3aU=
 github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=