first commit

serial/serial.go

@@ -0,0 +1,51 @@
+package serial
+
+import "io"
+
+// SerialPort object
+type SerialPort interface {
+	// Read(p []byte) (n int, err error)
+	// Write(p []byte) (n int, err error)
+	// Close() error
+	io.ReadWriteCloser
+
+	// Set port speed
+	SetSpeed(baudrate int) error
+}
+
+// Platform independent error type for serial ports
+type SerialPortError struct {
+	err  string
+	code int
+}
+
+const (
+	ERROR_PORT_BUSY           = 1
+	ERROR_NOT_FOUND           = 2
+	ERROR_INVALID_SERIAL_PORT = 3
+	ERROR_PERMISSION_DENIED   = 4
+	ERROR_INVALID_PORT_SPEED  = 5
+	ERROR_OTHER               = 99
+)
+
+func (e SerialPortError) Error() string {
+	switch e.code {
+	case ERROR_PORT_BUSY:
+		return "Serial port busy"
+	case ERROR_NOT_FOUND:
+		return "Serial port not found"
+	case ERROR_INVALID_SERIAL_PORT:
+		return "Invalid serial port"
+	case ERROR_PERMISSION_DENIED:
+		return "Permission denied"
+	case ERROR_INVALID_PORT_SPEED:
+		return "Invalid port speed"
+	}
+	return e.err
+}
+
+func (e SerialPortError) Code() int {
+	return e.code
+}
+
+// vi:ts=2