/**
* Open the serial port setting the baud etc.
*/
func openSerial() (io.ReadWriteCloser, error) {
file, err :=
os.OpenFile(
"/dev/ttyUSB0",
syscall.O_RDWR|syscall.O_NOCTTY,
0600)
if err != nil {
return nil, err
}
fd := C.int(file.Fd())
if C.isatty(fd) == 0 {
err := errors.New("File is not a serial port")
return nil, err
}
var termios C.struct_termios
_, err = C.tcgetattr(fd, &termios)
if err != nil {
return nil, err
}
var baud C.speed_t
baud = C.B115200
_, err = C.cfsetispeed(&termios, baud)
if err != nil {
return nil, err
}
_, err = C.cfsetospeed(&termios, baud)
if err != nil {
return nil, err
}
return file, nil
}
// Determines if the device is a terminal. Return an error, if any.
//
// int isatty(int fd);
func CheckIsatty(fd int) error {
exitCode, errno := C.isatty(C.int(fd))
if exitCode == 1 {
return nil
}
return errors.New("it is not a tty: " + errno.Error())
}
// Determines if the device is a terminal.
//
// int isatty(int fd);
func Isatty(fd int) bool {
exitCode, _ := C.isatty(C.int(fd))
if exitCode == 1 {
return true
}
return false
}
func (c *Connection) getFileDescriptor() (fd C.int, err error) {
fd = C.int(c.file.Fd())
if C.isatty(fd) != 1 {
err = errors.New("File is not a tty")
}
return fd, err
}
// May move to util/file? For now is here because it's the only
// one used by colors.
func IsTerminal(file *os.File) bool {
rv, err := C.isatty(C.int(file.Fd()))
if err != nil {
return false
}
if rv != 0 {
return true
}
return false
}
func openPort(name string, c *Config) (rwc io.ReadWriteCloser, err error) {
f, err := os.OpenFile(name, syscall.O_RDWR|syscall.O_NOCTTY|syscall.O_NONBLOCK, 0666)
if err != nil {
return
}
defer func() {
if err != nil {
f.Close()
}
}()
fd := C.int(f.Fd())
if C.isatty(fd) != 1 {
return nil, errors.New("File is not a tty")
}
var st C.struct_termios
_, err = C.tcgetattr(fd, &st)
if err != nil {
return nil, err
}
var speed C.speed_t
switch c.Baud {
case 115200:
speed = C.B115200
case 57600:
speed = C.B57600
case 38400:
speed = C.B38400
case 19200:
speed = C.B19200
case 9600:
speed = C.B9600
default:
return nil, fmt.Errorf("Unknown baud rate %v", c.Baud)
}
_, err = C.cfsetispeed(&st, speed)
if err != nil {
return nil, err
}
_, err = C.cfsetospeed(&st, speed)
if err != nil {
return nil, err
}
// Select local mode
st.c_cflag |= C.CLOCAL | C.CREAD
// Select stop bits
switch c.StopBits {
case StopBits1:
st.c_cflag &^= C.CSTOPB
case StopBits2:
st.c_cflag |= C.CSTOPB
default:
panic(c.StopBits)
}
// Select character size
st.c_cflag &^= C.CSIZE
switch c.Size {
case Byte5:
st.c_cflag |= C.CS5
case Byte6:
st.c_cflag |= C.CS6
case Byte7:
st.c_cflag |= C.CS7
case Byte8:
st.c_cflag |= C.CS8
default:
panic(c.Size)
}
// Select parity mode
switch c.Parity {
case ParityNone:
st.c_cflag &^= C.PARENB
case ParityEven:
st.c_cflag |= C.PARENB
st.c_cflag &^= C.PARODD
case ParityOdd:
st.c_cflag |= C.PARENB
st.c_cflag |= C.PARODD
default:
panic(c.Parity)
}
// Select CRLF translation
if c.CRLFTranslate {
st.c_iflag |= C.ICRNL
} else {
st.c_iflag &^= C.ICRNL
}
// Select raw mode
st.c_lflag &^= C.ICANON | C.ECHO | C.ECHOE | C.ISIG
st.c_oflag &^= C.OPOST
_, err = C.tcsetattr(fd, C.TCSANOW, &st)
if err != nil {
return nil, err
}
//fmt.Println("Tweaking", name)
r1, _, e := syscall.Syscall(syscall.SYS_FCNTL,
uintptr(f.Fd()),
uintptr(syscall.F_SETFL),
uintptr(0))
if e != 0 || r1 != 0 {
s := fmt.Sprint("Clearing NONBLOCK syscall error:", e, r1)
return nil, errors.New(s)
}
/*
r1, _, e = syscall.Syscall(syscall.SYS_IOCTL,
uintptr(f.Fd()),
uintptr(0x80045402), // IOSSIOSPEED
uintptr(unsafe.Pointer(&baud)));
if e != 0 || r1 != 0 {
s := fmt.Sprint("Baudrate syscall error:", e, r1)
return nil, os.NewError(s)
}
*/
return f, nil
}
func OpenPort(name string, baud int) (rwc io.ReadWriteCloser, err error) {
f, err := os.OpenFile(name, syscall.O_RDWR|syscall.O_NOCTTY|syscall.O_NONBLOCK, 0666)
if err != nil {
return
}
fd := C.int(f.Fd())
if C.isatty(fd) != 1 {
f.Close()
return nil, fmt.Errorf("[ERROR] not a tty/cu device")
}
var st C.struct_termios
_, err = C.tcgetattr(fd, &st)
if err != nil {
f.Close()
return nil, err
}
var speed C.speed_t
switch baud {
case 115200:
speed = C.B115200
case 57600:
speed = C.B57600
case 38400:
speed = C.B38400
case 19200:
speed = C.B19200
case 9600:
speed = C.B9600
default:
f.Close()
return nil, fmt.Errorf("Unknown baud rate %v", baud)
}
_, err = C.cfsetispeed(&st, speed)
if err != nil {
f.Close()
return nil, err
}
_, err = C.cfsetospeed(&st, speed)
if err != nil {
f.Close()
return nil, err
}
// Select local mode
st.c_cflag |= (C.CLOCAL | C.CREAD)
// Select raw mode
st.c_lflag &= ^C.tcflag_t(C.ICANON | C.ECHO | C.ECHOE | C.ISIG)
st.c_oflag &= ^C.tcflag_t(C.OPOST)
_, err = C.tcsetattr(fd, C.TCSANOW, &st)
if err != nil {
f.Close()
return nil, err
}
r1, _, e := syscall.Syscall(syscall.SYS_FCNTL,
uintptr(f.Fd()),
uintptr(syscall.F_SETFL),
uintptr(0))
if e != 0 || r1 != 0 {
s := fmt.Sprint("[WARN] clearing NONBLOCK syscall error:", e, r1)
f.Close()
return nil, fmt.Errorf("%s", s)
}
return f, nil
}
func isatty(fd uintptr) bool {
return int(C.isatty(C.int(fd))) != 0
}
// IsTty returns true is stdin is a terminal
func IsTty() bool {
return int(C.isatty(C.int(os.Stdin.Fd()))) != 0
}
// isatty is a wrapper around isatty(3).
// Returns true if the specified fd is associated with a tty.
func isatty(fd int) bool {
return C.isatty(C.int(fd)) == 1
}
func openPort(name string, baud int, spec []byte, flow []bool) (rwc io.ReadWriteCloser, err error) {
port := new(serialPort)
f, err := os.OpenFile(name, syscall.O_RDWR|syscall.O_NOCTTY|syscall.O_NONBLOCK, 0666)
if err != nil {
return
}
fd := C.int(f.Fd())
if C.isatty(fd) != 1 {
f.Close()
return nil, errors.New("File is not a tty")
}
var st C.struct_termios
_, err = C.tcgetattr(fd, &st)
if err != nil {
f.Close()
return nil, err
}
var speed C.speed_t
switch baud {
case 115200:
speed = C.B115200
case 57600:
speed = C.B57600
case 38400:
speed = C.B38400
case 19200:
speed = C.B19200
case 9600:
speed = C.B9600
default:
f.Close()
return nil, fmt.Errorf("Unknown baud rate %v", baud)
}
_, err = C.cfsetispeed(&st, speed)
if err != nil {
f.Close()
return nil, err
}
_, err = C.cfsetospeed(&st, speed)
if err != nil {
f.Close()
return nil, err
}
// Select local mode
st.c_cflag |= (C.CLOCAL | C.CREAD)
// Select raw mode
st.c_lflag &= ^C.tcflag_t(C.ICANON | C.ECHO | C.ECHOE | C.ISIG)
st.c_oflag &= ^C.tcflag_t(C.OPOST)
// Flow control
if flow[RTS_FLAG] {
st.c_cflag |= C.tcflag_t(C.CRTSCTS)
}
if flow[XON_FLAG] {
st.c_cflag |= C.tcflag_t(C.IXON | C.IXOFF | C.IXANY)
}
// Defaults to 8N1 if nothing valid is given
byteSize := spec[0]
parity := spec[1]
stopBits := spec[2]
switch byteSize {
case byte(5):
st.c_cflag |= C.tcflag_t(C.CS5)
break
case byte(6):
st.c_cflag |= C.tcflag_t(C.CS6)
break
case byte(7):
st.c_cflag |= C.tcflag_t(C.CS7)
break
case byte(8):
default:
st.c_cflag |= C.tcflag_t(C.CS8)
break
}
switch parity {
case PARITY_EVEN:
st.c_cflag |= C.tcflag_t(C.PARENB)
st.c_cflag &= ^C.tcflag_t(C.PARODD)
break
case PARITY_ODD:
st.c_cflag |= C.tcflag_t(C.PARENB)
st.c_cflag |= C.tcflag_t(C.PARODD)
break
case PARITY_NONE:
default:
st.c_cflag &= ^C.tcflag_t(C.PARENB)
break
}
switch stopBits {
case byte(2):
st.c_cflag |= C.tcflag_t(C.CSTOPB)
break
case byte(1):
default:
st.c_cflag &= ^C.tcflag_t(C.CSTOPB)
break
}
st.c_cflag &= ^C.tcflag_t(C.CSIZE)
_, err = C.tcsetattr(fd, C.TCSANOW, &st)
if err != nil {
f.Close()
return nil, err
}
//fmt.Println("Tweaking", name)
r1, _, e := syscall.Syscall(syscall.SYS_FCNTL,
uintptr(f.Fd()),
uintptr(syscall.F_SETFL),
uintptr(0))
if e != 0 || r1 != 0 {
s := fmt.Sprint("Clearing NONBLOCK syscall error:", e, r1)
f.Close()
return nil, errors.New(s)
}
/*
r1, _, e = syscall.Syscall(syscall.SYS_IOCTL,
uintptr(f.Fd()),
uintptr(0x80045402), // IOSSIOSPEED
uintptr(unsafe.Pointer(&baud)));
if e != 0 || r1 != 0 {
s := fmt.Sprint("Baudrate syscall error:", e, r1)
f.Close()
return nil, os.NewError(s)
}
*/
port.f = f
return port, nil
}
func openPort(name string, baud int) (rwc io.ReadWriteCloser, err error) {
f, err := os.OpenFile(name, syscall.O_RDWR|syscall.O_NOCTTY|syscall.O_NONBLOCK, 0666)
if err != nil {
return
}
fd := C.int(f.Fd())
if C.isatty(fd) != 1 {
f.Close()
return nil, errors.New("File is not a tty")
}
var st C.struct_termios
_, err = C.tcgetattr(fd, &st)
if err != nil {
f.Close()
return nil, err
}
var speed C.speed_t
switch baud {
case 115200:
speed = C.B115200
case 57600:
speed = C.B57600
case 38400:
speed = C.B38400
case 19200:
speed = C.B19200
case 9600:
speed = C.B9600
case 4800:
speed = C.B4800
case 2400:
speed = C.B2400
default:
f.Close()
return nil, fmt.Errorf("Unknown baud rate %v", baud)
}
_, err = C.cfsetispeed(&st, speed)
if err != nil {
f.Close()
return nil, err
}
_, err = C.cfsetospeed(&st, speed)
if err != nil {
f.Close()
return nil, err
}
// Select local mode
st.c_cflag |= (C.CLOCAL | C.CREAD)
// Select raw mode
st.c_lflag &= ^C.tcflag_t(C.ICANON | C.ECHO | C.ECHOE | C.ISIG)
st.c_oflag &= ^C.tcflag_t(C.OPOST)
_, err = C.tcsetattr(fd, C.TCSANOW, &st)
if err != nil {
f.Close()
return nil, err
}
//fmt.Println("Tweaking", name)
r1, _, e := syscall.Syscall(syscall.SYS_FCNTL,
uintptr(f.Fd()),
uintptr(syscall.F_SETFL),
uintptr(0))
if e != 0 || r1 != 0 {
s := fmt.Sprint("Clearing NONBLOCK syscall error:", e, r1)
f.Close()
return nil, errors.New(s)
}
/*
r1, _, e = syscall.Syscall(syscall.SYS_IOCTL,
uintptr(f.Fd()),
uintptr(0x80045402), // IOSSIOSPEED
uintptr(unsafe.Pointer(&baud)));
if e != 0 || r1 != 0 {
s := fmt.Sprint("Baudrate syscall error:", e, r1)
f.Close()
return nil, os.NewError(s)
}
*/
return f, nil
}
func isTerminal(file *os.File) bool {
return int(C.isatty(C.int(file.Fd()))) != 0
}
func IsATTY(fd int) bool {
return C.isatty(C.int(fd)) != 0
}
func openPort(name string, baud int) (rwc io.ReadWriteCloser, err error) {
f, err := os.OpenFile(name, syscall.O_RDWR|syscall.O_NOCTTY, 0666)
if err != nil {
return
}
fd := C.int(f.Fd())
if C.isatty(fd) != 1 {
f.Close()
return nil, errors.New("File is not a tty")
}
var st C.struct_termios
_, err = C.tcgetattr(fd, &st)
if err != nil {
f.Close()
return nil, err
}
var speed C.speed_t
switch baud {
case 115200:
speed = C.B115200
case 57600:
speed = C.B57600
case 38400:
speed = C.B38400
case 19200:
speed = C.B19200
case 9600:
speed = C.B9600
case 4800:
speed = C.B4800
case 2400:
speed = C.B2400
default:
f.Close()
return nil, fmt.Errorf("Unknown baud rate %v", baud)
}
_, err = C.cfsetispeed(&st, speed)
if err != nil {
f.Close()
return nil, err
}
_, err = C.cfsetospeed(&st, speed)
if err != nil {
f.Close()
return nil, err
}
// Select local mode
st.c_cflag |= (C.CLOCAL | C.CREAD)
// Select raw mode
st.c_lflag &= ^C.tcflag_t(C.ICANON | C.ECHO | C.ECHOE | C.ISIG)
st.c_oflag &= ^C.tcflag_t(C.OPOST)
_, err = C.tcsetattr(fd, C.TCSANOW, &st)
if err != nil {
f.Close()
return nil, err
}
return f, nil
}
func NewLogger(clevel int) *logger {
return &logger{clevel, int(C.isatty(C.int(os.Stdout.Fd()))) != 0, os.Stdout}
}
func SerialChannels(name string, baud int, debug bool) (chan byte, chan byte, chan bool, chan bool, error) {
var err error
var serFile *os.File
var chFromSerial, chToSerial chan byte
var chDTRSerial, chQuitSerial chan bool
serFile, err = os.OpenFile(name, os.O_RDWR|syscall.O_NOCTTY|syscall.O_NONBLOCK, 0666)
if err == nil {
fd := C.int(serFile.Fd())
var st C.struct_termios
_, err = C.tcgetattr(fd, &st)
if err == nil {
if C.isatty(fd) != 1 {
err = errors.New("Not a tty")
}
}
var speed C.speed_t
if err == nil {
switch baud {
case 230400:
speed = C.B230400
case 115200:
speed = C.B115200
case 57600:
speed = C.B57600
case 19200:
speed = C.B19200
case 9600:
speed = C.B9600
default:
err = errors.New("Invalid baud rate")
}
}
if err == nil {
_, err = C.cfsetispeed(&st, speed)
if err == nil {
_, err = C.cfsetospeed(&st, speed)
}
}
if err == nil {
C.cfmakeraw(&st)
_, err = C.tcsetattr(fd, C.TCSANOW, &st)
}
if err == nil {
chFromSerial = make(chan byte, 8192)
chQuitFrom := make(chan bool)
go func() {
datain := make([]byte, 1)
for q := false; q == false; {
count, _ := serFile.Read(datain)
for i := 0; i < count; i++ {
if debug {
if datain[i] == byte(0x0D) {
fmt.Print("(\n)")
} else {
fmt.Printf("(%02X)", datain[i])
}
}
chFromSerial <- datain[i]
}
select {
case q = <-chQuitFrom:
default:
}
time.Sleep(10)
}
}()
chToSerial = make(chan byte, 8192)
chQuitTo := make(chan bool)
go func() {
dataout := make([]byte, 1)
for q := false; q == false; {
dataout[0] = <-chToSerial
if debug {
if dataout[0] == byte(0x0D) {
fmt.Print("[\n]")
} else {
fmt.Printf("[%c]", dataout[0])
}
}
scount, serr := serFile.Write(dataout)
if scount != 1 || serr != nil {
fmt.Printf("SERIAL ERROR: write error [%d][%s]\n", scount, serr)
}
}
}()
chDTRSerial = make(chan bool)
chQuitDTR := make(chan bool)
go func() {
var param uint
var ep syscall.Errno
for q := false; q == false; {
select {
case q = <-chQuitDTR:
case dtr := <-chDTRSerial:
param = syscall.TIOCM_DTR
if dtr {
_, _, ep = syscall.Syscall(syscall.SYS_IOCTL, uintptr(fd), syscall.TIOCMBIS, uintptr(unsafe.Pointer(¶m)))
} else {
_, _, ep = syscall.Syscall(syscall.SYS_IOCTL, uintptr(fd), syscall.TIOCMBIC, uintptr(unsafe.Pointer(¶m)))
}
if ep != 0 {
fmt.Printf("SERIAL ERROR: DTR error [%d]\n", ep)
}
}
}
}()
go func() {
<-chQuitSerial
serFile.Close()
chQuitFrom <- true
chQuitTo <- true
chQuitDTR <- true
}()
}
}
return chFromSerial, chToSerial, chDTRSerial, chQuitSerial, err
}
func isTerminal(file *os.File) bool {
if C.isatty(C.int(file.Fd())) == 0 {
return false
}
return true
}
func openPort(name string, baud int, readTimeout time.Duration) (p *Port, err error) {
f, err := os.OpenFile(name, syscall.O_RDWR|syscall.O_NOCTTY|syscall.O_NONBLOCK, 0666)
if err != nil {
return
}
fd := C.int(f.Fd())
if C.isatty(fd) != 1 {
f.Close()
return nil, errors.New("File is not a tty")
}
var st C.struct_termios
_, err = C.tcgetattr(fd, &st)
if err != nil {
f.Close()
return nil, err
}
var speed C.speed_t
switch baud {
case 115200:
speed = C.B115200
case 57600:
speed = C.B57600
case 38400:
speed = C.B38400
case 19200:
speed = C.B19200
case 9600:
speed = C.B9600
case 4800:
speed = C.B4800
case 2400:
speed = C.B2400
default:
f.Close()
return nil, fmt.Errorf("Unknown baud rate %v", baud)
}
_, err = C.cfsetispeed(&st, speed)
if err != nil {
f.Close()
return nil, err
}
_, err = C.cfsetospeed(&st, speed)
if err != nil {
f.Close()
return nil, err
}
// Turn off break interrupts, CR->NL, Parity checks, strip, and IXON
st.c_iflag &= ^C.tcflag_t(C.BRKINT | C.ICRNL | C.INPCK | C.ISTRIP | C.IXOFF | C.IXON | C.PARMRK)
// Select local mode, turn off parity, set to 8 bits
st.c_cflag &= ^C.tcflag_t(C.CSIZE | C.PARENB)
st.c_cflag |= (C.CLOCAL | C.CREAD | C.CS8)
// Select raw mode
st.c_lflag &= ^C.tcflag_t(C.ICANON | C.ECHO | C.ECHOE | C.ISIG)
st.c_oflag &= ^C.tcflag_t(C.OPOST)
// set blocking / non-blocking read
/*
* http://man7.org/linux/man-pages/man3/termios.3.html
* - Supports blocking read and read with timeout operations
*/
vmin, vtime := posixTimeoutValues(readTimeout)
st.c_cc[C.VMIN] = C.cc_t(vmin)
st.c_cc[C.VTIME] = C.cc_t(vtime)
_, err = C.tcsetattr(fd, C.TCSANOW, &st)
if err != nil {
f.Close()
return nil, err
}
//fmt.Println("Tweaking", name)
r1, _, e := syscall.Syscall(syscall.SYS_FCNTL,
uintptr(f.Fd()),
uintptr(syscall.F_SETFL),
uintptr(0))
if e != 0 || r1 != 0 {
s := fmt.Sprint("Clearing NONBLOCK syscall error:", e, r1)
f.Close()
return nil, errors.New(s)
}
/*
r1, _, e = syscall.Syscall(syscall.SYS_IOCTL,
uintptr(f.Fd()),
uintptr(0x80045402), // IOSSIOSPEED
uintptr(unsafe.Pointer(&baud)));
if e != 0 || r1 != 0 {
s := fmt.Sprint("Baudrate syscall error:", e, r1)
f.Close()
return nil, os.NewError(s)
}
*/
return &Port{f: f}, nil
}
func IsTerminal(file *os.File) bool {
return (int(C.isatty(C.int(file.Fd()))) == 1)
}
