move serial port to external package

5 files changed, 22 insertions, 225 deletions

diff --git a/.gitignore b/.gitignore
index 23950cf..bc88ec7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 bin/
 pkg/
 src/github.com
+src/code.helsinki.at
diff --git a/src/rhctl/audio_switch.go b/src/rhctl/audio_switch.go
index f8c1cb1..27449cf 100644
--- a/src/rhctl/audio_switch.go
+++ b/src/rhctl/audio_switch.go
@@ -25,6 +25,8 @@ import (
 	"fmt"
 	"strings"
 	"time"
+
+	"code.helsinki.at/goserial"
 )
 
 type SwitchResult uint8
@@ -106,7 +108,7 @@ type SwitchState struct {
 }
 
 type AudioSwitch struct {
-	port         *SerialPort
+	port         *goserial.Port
 	timeout      time.Duration
 	Inputs       ConfigSwitchInputs
 	current      *SwitchCommand
@@ -342,7 +344,7 @@ func (sw *AudioSwitch) Run() {
 				}
 				sw.current = nil
 				sw.timer = nil
-			case data := <-sw.port.rx:
+			case data := <-sw.port.RX:
 				sw.handleData(data)
 			}
 		} else {
@@ -358,10 +360,10 @@ func (sw *AudioSwitch) Run() {
 				} else {
 					rhdl.Printf("sending '%s' to switch", c)
 					sw.current = cmd
-					sw.port.tx <- c
+					sw.port.TX <- c
 					sw.timer = time.NewTimer(sw.timeout)
 				}
-			case data := <-sw.port.rx:
+			case data := <-sw.port.RX:
 				sw.handleData(data)
 			}
 		}
@@ -380,7 +382,7 @@ func SwitchInit(conf *Config) (sw *AudioSwitch, err error) {
 	sw.Commands = make(chan *SwitchCommand, 16)
 	sw.Updates = make(chan SwitchUpdate, 32)
 
-	if sw.port, err = SerialOpen(conf.Audioswitch.Device, conf.Audioswitch.Baudrate, ""); err != nil {
+	if sw.port, err = goserial.Open(conf.Audioswitch.Device, conf.Audioswitch.Baudrate, ""); err != nil {
 		err = fmt.Errorf("Audioswitch: error opening serial port: %s", err)
 		return
 	}
diff --git a/src/rhctl/conf.go b/src/rhctl/conf.go
index c163b60..3edacdc 100644
--- a/src/rhctl/conf.go
+++ b/src/rhctl/conf.go
@@ -28,6 +28,7 @@ import (
 	"strings"
 	"time"
 
+	"code.helsinki.at/goserial"
 	"github.com/naoina/toml"
 )
 
@@ -60,17 +61,17 @@ func (p ConfigSwitchInputs) GetServerAndChannel(in SwitchInputNum) (string, stri
 type Config struct {
 	Audioswitch struct {
 		Device   string             `toml:"dev"`
-		Baudrate Baudrate           `toml:"baud"`
+		Baudrate goserial.Baudrate  `toml:"baud"`
 		Timeout  Duration           `toml:"timeout"`
 		Unit     SwitchUnitID       `toml:"unit"`
 		Inputs   ConfigSwitchInputs `toml:"inputs"`
 	}
 
 	Servers map[string]struct {
-		Device             string   `toml:"dev"`
-		Baudrate           Baudrate `toml:"baud"`
-		HeartbeatTimeout   Duration `toml:"heartbeat_timeout"`
-		HeartbeatThreshold uint     `toml:"heartbeat_threshold"`
+		Device             string            `toml:"dev"`
+		Baudrate           goserial.Baudrate `toml:"baud"`
+		HeartbeatTimeout   Duration          `toml:"heartbeat_timeout"`
+		HeartbeatThreshold uint              `toml:"heartbeat_threshold"`
 	}
 
 	Timing struct {
diff --git a/src/rhctl/playout_server.go b/src/rhctl/playout_server.go
index b6054c6..b0cf433 100644
--- a/src/rhctl/playout_server.go
+++ b/src/rhctl/playout_server.go
@@ -25,6 +25,8 @@ import (
 	"fmt"
 	"strings"
 	"time"
+
+	"code.helsinki.at/goserial"
 )
 
 type ServerHealth bool
@@ -61,7 +63,7 @@ type ServerState struct {
 
 type PlayoutServer struct {
 	name          string
-	device        *SerialPort
+	device        *goserial.Port
 	hbtimeout     time.Duration
 	hbtimer       *time.Timer
 	hbthreshold   uint
@@ -90,7 +92,7 @@ func (srv *PlayoutServer) handleHeartbeat() {
 		srv.StateChanges <- srv.state
 		rhl.Printf("Server(%s): is back from the dead!", srv.name)
 		if srv.state.Channel == "" {
-			srv.device.tx <- ServerChannelReq
+			srv.device.TX <- ServerChannelReq
 		}
 	}
 }
@@ -145,7 +147,7 @@ func (srv *PlayoutServer) Run() {
 		select {
 		case <-stop:
 			return
-		case data := <-srv.device.rx:
+		case data := <-srv.device.RX:
 			srv.handleMessage(data)
 		case <-srv.hbtimer.C:
 			srv.handleHBTimeout()
@@ -153,10 +155,10 @@ func (srv *PlayoutServer) Run() {
 			if srv.state.Health == ServerDead {
 				srv.StateChanges <- srv.state
 			} else {
-				srv.device.tx <- ServerChannelReq
+				srv.device.TX <- ServerChannelReq
 			}
 		case update := <-srv.SwitchUpdates:
-			srv.device.tx <- update.Data
+			srv.device.TX <- update.Data
 		}
 	}
 }
@@ -181,7 +183,7 @@ func ServerInit(name string, conf *Config) (srv *PlayoutServer, err error) {
 	srv.UpdateRequest = make(chan bool, 8)
 	srv.SwitchUpdates = make(chan SwitchUpdate, 32)
 
-	if srv.device, err = SerialOpen(conf.Servers[name].Device, conf.Servers[name].Baudrate, "\n"); err != nil {
+	if srv.device, err = goserial.Open(conf.Servers[name].Device, conf.Servers[name].Baudrate, "\n"); err != nil {
 		err = fmt.Errorf("Server(%s): error opening serial port: %s", srv.name, err)
 		return
 	}
diff --git a/src/rhctl/serial_port.go b/src/rhctl/serial_port.go
deleted file mode 100644
index 5440f99..0000000
--- a/src/rhctl/serial_port.go
+++ /dev/null
@@ -1,209 +0,0 @@
-//
-//  rhctl
-//
-//  Copyright (C) 2009-2016 Christian Pointner <equinox@helsinki.at>
-//
-//  This file is part of rhctl.
-//
-//  rhctl is free software: you can redistribute it and/or modify
-//  it under the terms of the GNU General Public License as published by
-//  the Free Software Foundation, either version 3 of the License, or
-//  any later version.
-//
-//  rhctl is distributed in the hope that it will be useful,
-//  but WITHOUT ANY WARRANTY; without even the implied warranty of
-//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-//  GNU General Public License for more details.
-//
-//  You should have received a copy of the GNU General Public License
-//  along with rhctl. If not, see <http://www.gnu.org/licenses/>.
-//
-
-package main
-
-import (
-	"bufio"
-	"errors"
-	"strconv"
-	"syscall"
-
-	"github.com/schleibinger/sio"
-)
-
-type Baudrate struct {
-	value uint32
-	code  uint32
-}
-
-func NewBaudrate(value uint32) (b *Baudrate, err error) {
-	b = &Baudrate{}
-	err = b.FromUint(value)
-	return
-}
-
-func (b Baudrate) String() string {
-	return strconv.FormatUint(uint64(b.value), 10)
-}
-
-func (b Baudrate) MarshalText() (data []byte, err error) {
-	data = []byte(b.String())
-	return
-}
-
-func (b Baudrate) MarshalJSON() (data []byte, err error) {
-	data = []byte(b.String())
-	return
-}
-
-func (b Baudrate) MarshalTOML() (data []byte, err error) {
-	data = []byte(b.String())
-	return
-}
-
-func (b *Baudrate) FromUint(value uint32) error {
-	b.value = value
-	switch b.value {
-	case 50:
-		b.code = syscall.B50
-	case 75:
-		b.code = syscall.B75
-	case 110:
-		b.code = syscall.B110
-	case 134:
-		b.code = syscall.B134
-	case 150:
-		b.code = syscall.B150
-	case 200:
-		b.code = syscall.B200
-	case 300:
-		b.code = syscall.B300
-	case 600:
-		b.code = syscall.B600
-	case 1200:
-		b.code = syscall.B1200
-	case 1800:
-		b.code = syscall.B1800
-	case 2400:
-		b.code = syscall.B2400
-	case 4800:
-		b.code = syscall.B4800
-	case 9600:
-		b.code = syscall.B9600
-	case 19200:
-		b.code = syscall.B19200
-	case 38400:
-		b.code = syscall.B38400
-	case 57600:
-		b.code = syscall.B57600
-	case 115200:
-		b.code = syscall.B115200
-	case 230400:
-		b.code = syscall.B230400
-	case 460800:
-		b.code = syscall.B460800
-	case 500000:
-		b.code = syscall.B500000
-	case 576000:
-		b.code = syscall.B576000
-	case 921600:
-		b.code = syscall.B921600
-	case 1000000:
-		b.code = syscall.B1000000
-	case 1152000:
-		b.code = syscall.B1152000
-	case 1500000:
-		b.code = syscall.B1500000
-	case 2000000:
-		b.code = syscall.B2000000
-	case 2500000:
-		b.code = syscall.B2500000
-	case 3000000:
-		b.code = syscall.B3000000
-	case 3500000:
-		b.code = syscall.B3500000
-	case 4000000:
-		b.code = syscall.B4000000
-	default:
-		return errors.New("invalid baudrate")
-	}
-	return nil
-}
-
-func (b *Baudrate) fromString(str string) error {
-	vuint, err := strconv.ParseUint(str, 10, 32)
-	if err != nil {
-		return err
-	}
-	return b.FromUint(uint32(vuint))
-}
-
-func (b *Baudrate) UnmarshalText(data []byte) error {
-	return b.fromString(string(data))
-}
-
-func (b *Baudrate) UnmarshalJSON(data []byte) error {
-	return b.fromString(string(data))
-}
-
-func (b *Baudrate) UnmarshalTOML(data []byte) error {
-	return b.fromString(string(data))
-}
-
-type SerialPort struct {
-	port    *sio.Port
-	rx      <-chan string
-	tx      chan<- string
-	newline string
-}
-
-func serialReader(c chan<- string, port *sio.Port, stop chan<- bool) {
-	defer func() {
-		port.Close()
-		stop <- true
-	}()
-
-	scanner := bufio.NewScanner(port)
-	scanner.Split(bufio.ScanLines)
-	for scanner.Scan() {
-		data := scanner.Text()
-		if len(data) == 0 {
-			continue
-		}
-		c <- data
-	}
-	if err := scanner.Err(); err != nil {
-		rhl.Printf("device(%s): read error: %s", port.LocalAddr(), err)
-	} else {
-		rhl.Printf("device(%s): closed", port.LocalAddr())
-	}
-}
-
-func serialWriter(c <-chan string, port *sio.Port, newline string, stop chan<- bool) {
-	defer func() {
-		port.Close()
-		stop <- true
-	}()
-
-	for data := range c {
-		port.Write([]byte(data + newline))
-	}
-}
-
-func (port *SerialPort) Run(stop chan<- bool) (err error) {
-	tx := make(chan string, 10)
-	rx := make(chan string, 20)
-	go serialReader(rx, port.port, stop)
-	go serialWriter(tx, port.port, port.newline, stop)
-
-	port.rx = rx
-	port.tx = tx
-	return
-}
-
-func SerialOpen(device string, rate Baudrate, newline string) (port *SerialPort, err error) {
-	port = &SerialPort{newline: newline}
-	if port.port, err = sio.Open(device, rate.code); err != nil {
-		return
-	}
-	return
-}