You should also visit another Serial Port page.
############################################
# A first quick test if you have a modem
# open com2: for reading and writing
# For UNIX'es use the appropriate devices /dev/xxx
set serial [open com2: r+]
# setup the baud rate, check it for your configuration
fconfigure $serial -mode "9600,n,8,1"
# don't block on read, don't buffer output
fconfigure $serial -blocking 0 -buffering none
# Send some AT-command to your modem
puts -nonewline $serial "AT\r"
# Give your modem some time, then read the answer
after 100
puts "Modem echo: [read $serial]"
############################################
# Example (1): Poll the comport periodically
set serial [open com2: r+]
fconfigure $serial -mode "9600,n,8,1"
fconfigure $serial -blocking 0 -buffering none
while {1} {
set data [read $serial] ;# read ALL incoming bytes
set size [string length $data] ;# number of received byte, may be 0
if { $size } {
puts "received $size bytes: $data"
} else {
puts "<no data>"
update ;# Display output, allow to close wish-window
}
############################################
# Example (2): Fileevents
set serial [open com2: r+]
fconfigure $serial -mode "9600,n,8,1" -blocking 0 -buffering none -translation binary
fileevent $serial readable [list serial_receiver $serial]
proc serial_receiver { chan } {
if { [eof $chan] } {
puts stderr "Closing $chan"
catch {close $chan}
return
}
set data [read $chan]
set size [string length $data]
puts "received $size bytes: $data"
}mailto:[email protected]
(Rolf Schroedter)In above examples, don't forget to use " close $serial " command when finished with serial port, or else the port will be locked from further use (the only way I know of rectifying this in Windows is to reboot the PC). - Jeff Wright ([email protected])
modemtcl
| Category Device Control |
|---|
