Added RTS/DTR configuration values

Author: cmaglie

go.mod

@@ -4,7 +4,7 @@ go 1.18
 
 require (
 	github.com/arduino/pluggable-monitor-protocol-handler v0.9.2
-	go.bug.st/serial v1.3.5
+	go.bug.st/serial v1.4.0
 	golang.org/x/exp v0.0.0-20220722155223-a9213eeb770e
 )
 

go.sum

@@ -11,8 +11,8 @@ github.com/hashicorp/go-multierror v1.1.1 h1:H5DkEtf6CXdFp0N0Em5UCwQpXMWke8IA0+l
 github.com/hashicorp/go-multierror v1.1.1/go.mod h1:iw975J/qwKPdAO1clOe2L8331t/9/fmwbPZ6JB6eMoM=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
-go.bug.st/serial v1.3.5 h1:k50SqGZCnHZ2MiBQgzccXWG+kd/XpOs1jUljpDDKzaE=
-go.bug.st/serial v1.3.5/go.mod h1:z8CesKorE90Qr/oRSJiEuvzYRKol9r/anJZEb5kt304=
+go.bug.st/serial v1.4.0 h1:IXHzPVbUBbql66lQZ1iV9LWzGXT5lh6S9gZxHK/KyQE=
+go.bug.st/serial v1.4.0/go.mod h1:z8CesKorE90Qr/oRSJiEuvzYRKol9r/anJZEb5kt304=
 golang.org/x/exp v0.0.0-20220722155223-a9213eeb770e h1:+WEEuIdZHnUeJJmEUjyYC2gfUMj69yZXw17EnHg/otA=
 golang.org/x/exp v0.0.0-20220722155223-a9213eeb770e/go.mod h1:Kr81I6Kryrl9sr8s2FK3vxD90NdsKWRuOIl2O4CvYbA=
 golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a h1:dGzPydgVsqGcTRVwiLJ1jVbufYwmzD3LfVPLKsKg+0k=

main.go

@@ -82,6 +82,18 @@ func NewSerialMonitor() *SerialMonitor {
 					Values:   []string{"1", "1.5", "2"},
 					Selected: "1",
 				},
+				"rts": {
+					Label:    "RTS",
+					Type:     "enum",
+					Values:   []string{"On", "Off"},
+					Selected: "On",
+				},
+				"dtr": {
+					Label:    "DTR",
+					Type:     "enum",
+					Values:   []string{"On", "Off"},
+					Selected: "On",
+				},
 			},
 		},
 		openedPort: false,
@@ -114,7 +126,17 @@ func (d *SerialMonitor) Configure(parameterName string, value string) error {
 	// Apply configuration to port
 	var configErr error
 	if d.openedPort {
-		configErr = d.serialPort.SetMode(d.getMode())
+		switch parameterName {
+		case "baudrate", "parity", "bits", "stop_bits":
+			configErr = d.serialPort.SetMode(d.getMode())
+		case "dtr":
+			configErr = d.serialPort.SetDTR(d.getDTR())
+		case "rts":
+			configErr = d.serialPort.SetRTS(d.getRTS())
+		default:
+			// Should never happen
+			panic("Invalid parameter: " + parameterName)
+		}
 	}
 
 	// If configuration failed, rollback settings
@@ -133,7 +155,6 @@ func (d *SerialMonitor) Open(boardPort string) (io.ReadWriter, error) {
 	serialPort, err := serial.Open(boardPort, d.getMode())
 	if err != nil {
 		return nil, err
-
 	}
 	d.openedPort = true
 	d.serialPort = serialPort
@@ -184,6 +205,18 @@ func (d *SerialMonitor) getMode() *serial.Mode {
 		Parity:   parity,
 		DataBits: dataBits,
 		StopBits: stopBits,
+		InitialStatusBits: &serial.ModemOutputBits{
+			DTR: d.getDTR(),
+			RTS: d.getRTS(),
+		},
 	}
 	return mode
 }
+
+func (d *SerialMonitor) getDTR() bool {
+	return d.serialSettings.ConfigurationParameter["dtr"].Selected == "On"
+}
+
+func (d *SerialMonitor) getRTS() bool {
+	return d.serialSettings.ConfigurationParameter["rts"].Selected == "On"
+}