Add an auto-measure toggle with a cable length range, and console keys through the harness

main.go

@@ -56,8 +56,8 @@ func resetAll(dirs []*direction, mods []*phyModule) time.Time {
 // Nothing to hold or revert here: failures during a measure were never
 // counted, so the view is always the counters as they stand.
 func phyView(diag *cableDiag, modules []*phyModule) (phyDisplay, bool) {
-	info, measuring := diag.snapshot()
-	return phyDisplayFrom(info, measuring, modules[0].view(), modules[1].view()), measuring
+	info, rng, measuring := diag.snapshot()
+	return phyDisplayFrom(info, rng, measuring, modules[0].view(), modules[1].view()), measuring
 }
 
 var intervalCols = []colSpec{
@@ -141,7 +141,8 @@ func main() {
 }
 
 const (
-	reportInterval = time.Second
+	reportInterval    = time.Second
+	autoMeasurePeriod = 60 * time.Second
 	// Deliberately not tied to the refresh: letting a slow or blocked draw set
 	// the sampling clock would stretch the window it reports.
 	sampleInterval = 16 * time.Millisecond
@@ -320,7 +321,7 @@ func run(aName, bName string) (err error) {
 	sig := make(chan os.Signal, 1)
 	signal.Notify(sig, syscall.SIGINT, syscall.SIGTERM)
 
-	space, restoreTerm := watchSpace()
+	keys, restoreTerm := watchKeys()
 	defer restoreTerm()
 
 	disp, err := newDisplay()
@@ -345,6 +346,7 @@ func run(aName, bName string) (err error) {
 	// hide or revert afterwards.
 	kickMeasure := func() {
 		if diag.kick(&done) {
+			diag.resetRange()
 			start = resetAll(dirs, modules)
 			hist.reset()
 		}
@@ -359,6 +361,8 @@ func run(aName, bName string) (err error) {
 	views := make([]view, len(dirs))
 	rows := make([]view, len(dirs))
 	stats := &streamTable{cols: intervalCols, headerEvery: 20}
+	var autoOn bool
+	var autoAnchor time.Time
 	for {
 		select {
 		case p := <-fatalCh:
@@ -366,8 +370,13 @@ func run(aName, bName string) (err error) {
 		case <-sig:
 			return nil
 		// The verdict lives in the cable cell, not its own line.
-		case <-space:
-			kickMeasure()
+		case b := <-keys:
+			switch b {
+			case ' ', 'r':
+				kickMeasure()
+			case 'a':
+				autoOn, autoAnchor = !autoOn, time.Now()
+			}
 		case <-disp.fb.flips:
 			now := time.Now()
 			px, py, down := touch.get()
@@ -375,6 +384,17 @@ func run(aName, bName string) (err error) {
 			if disp.holdReset(x, y, down, now) {
 				kickMeasure()
 			}
+			if disp.tapAuto(x, y, down) {
+				autoOn, autoAnchor = !autoOn, now
+			}
+			autoFrac := 0.0
+			if autoOn {
+				autoFrac = float64(now.Sub(autoAnchor)) / float64(autoMeasurePeriod)
+				if autoFrac >= 1 {
+					diag.kick(&done)
+					autoAnchor, autoFrac = now, 0
+				}
+			}
 			disp.showVersion = down && disp.versionSpot.contains(x, y)
 			for i, d := range dirs {
 				views[i] = d.displayView()
@@ -383,7 +403,7 @@ func run(aName, bName string) (err error) {
 			phy, measuring := phyView(diag, modules)
 			hist.sample(now, v, phy, measuring, target)
 			if err := disp.render(v, now.Sub(start), phy, measuring,
-				hist.view(now), target); err != nil {
+				hist.view(now), target, autoOn, autoFrac); err != nil {
 				return err
 			}
 		case now := <-tick.C: