func main() {
baudRate := flag.Int("baud", 57600, "Baud rate")
dev := "/dev/ttyS0"
flag.Parse()
switch flag.NArg() {
case 0:
// nop
case 1:
dev = flag.Arg(0)
default:
logFatalf("expected max 1 arg: the serial port device, default is /dev/ttyS0")
}
port, err := sio.Open(dev, bauds[*baudRate])
if err != nil {
logFatalf("open: %s", err)
}
rxbuf := []byte{0}
ofs := 0
for {
n, err := port.Read(rxbuf)
if err != nil {
logFatalf("read: %s", err)
}
if n != len(rxbuf) {
logFatalf("short read: %d %d", n, len(rxbuf))
}
if ofs%16 == 0 {
fmt.Printf("\n%04x: ", ofs)
}
fmt.Printf("%02x ", rxbuf[0])
ofs++
}
}
func main() {
oDTR := flag.Bool("dtr", false, "excercise the DTR control line")
oDSR := flag.Bool("dsr", false, "excercise the DSR control line")
oRTS := flag.Bool("rts", false, "excercise the RTS control line")
oCTS := flag.Bool("cts", false, "excercise the CTS control line")
oHalf := flag.Duration("t", 100*time.Millisecond, "flipping time")
baudRate := flag.Int("baud", 57600, "Baud rate")
flag.Parse()
if !*oDTR && !*oRTS && !*oDSR && !*oCTS {
log.Fatal("Please specify at least on of -dtr -rts -dsr -cts")
}
dev := "/dev/ttyS0"
switch flag.NArg() {
case 0:
// nop
case 1:
dev = flag.Arg(0)
default:
log.Fatalf("expected max 1 arg: the serial port device, default is %s", dev)
}
port, err := sio.Open(dev, bauds[*baudRate])
if err != nil {
log.Fatal(err)
}
c := time.Tick(*oHalf)
var on bool
for {
<-c
if *oDTR {
if err := port.SetDTR(on); err != nil {
port.Close()
log.Fatal(err)
}
}
if *oDSR {
if err := port.SetDSR(on); err != nil {
port.Close()
log.Fatal(err)
}
}
if *oRTS {
if err := port.SetRTS(on); err != nil {
port.Close()
log.Fatal(err)
}
}
if *oCTS {
if err := port.SetCTS(on); err != nil {
port.Close()
log.Fatal(err)
}
}
on = !on
}
}
func main() {
baudRate := flag.Int("baud", 57600, "Baud rate")
server := flag.Bool("server", false, "Send dummy text to the serial device continuously")
echo := flag.Bool("echo", false, "ping client/server, combine w/ -server")
verbose := flag.Bool("v", false, "verbose (applies to -echo)")
slow := flag.Bool("slow", false, "slow echo server to 1 byte/sec")
flag.Parse()
dev := "/dev/ttyS0"
switch flag.NArg() {
case 0:
// nop
case 1:
dev = flag.Arg(0)
default:
logFatalf("expected max 1 arg: the serial port device, default is /dev/ttyS0")
}
port, err := sio.Open(dev, bauds[*baudRate])
if err != nil {
logFatalf("open: %s", err)
}
switch *echo {
case false:
switch *server {
case true:
var s string
var sum int
pass := 0
for {
pass++
s = fmt.Sprintf("%d(%d): %s @ %s.\n", pass, sum, serve, time.Now())
n, err := port.Write([]byte(s))
if err != nil {
logFatalf("write: %s", err)
}
if n != len(s) {
logFatalf("short write: %d %d", n, len(serve))
}
fmt.Print(s)
sum += n
}
case false:
io.Copy(os.Stdout, port)
}
case true:
switch *server {
case true:
pass := 0
for {
pass++
rxbuf := []byte{0}
n, err := port.Read(rxbuf)
if err != nil {
logFatalf("read: %s", err)
}
if n != len(rxbuf) {
logFatalf("short read: %d %d", n, len(rxbuf))
}
if *verbose {
fmt.Printf("rx(%d): %02xH\n", pass, rxbuf[0])
}
if *slow {
<-time.After(time.Second)
}
txbuf := []byte{0}
copy(txbuf, rxbuf)
if n, err = port.Write(txbuf); err != nil {
logFatalf("write: %s", err)
}
if n != len(txbuf) {
logFatalf("short write: %d %d", n, len(txbuf))
}
if *verbose {
fmt.Printf("tx(%d): %02xH\n", pass, txbuf[0])
}
}
case false:
pass := 0
for txbuf, rxbuf := []byte{' '}, []byte{0}; ; txbuf[0]++ {
pass++
n, err := port.Write(txbuf)
if err != nil {
logFatalf("write: %s", err)
}
if n != len(txbuf) {
logFatalf("short write: %d %d", n, len(txbuf))
}
if *verbose {
fmt.Printf("tx(%d): %02xH\n", pass, txbuf)
os.Stdout.Sync()
}
if n, err = port.Read(rxbuf); err != nil {
logFatalf("read: %s", err)
}
if n != len(rxbuf) {
logFatalf("short read: %d %d", n, len(rxbuf))
}
if !bytes.Equal(txbuf, rxbuf) {
logFatalf(
"echoed data mismatch:\nTX:\n%s\nRX:\n%s",
hex.Dump(txbuf),
hex.Dump(rxbuf),
)
}
if *verbose {
fmt.Printf("rx(%d): %02xH\n", pass, rxbuf[0])
}
}
}
}
}