[EMAIL PROTECTED] wrote:
I need a promt/terminal when the device is connected to PC. If user
enters a command by serial port and press "Enter" then the data is
read by the device and work on the command. This is similar to
readline() function. Unfortunately there is no readline() function for
GM862 device. The following functions are available for serial port
data receive-
SER.read() - reads whole string at a time from buffer
SER.receive(timeout) - reads if there is any input in the buffer
andwait for the input upto timeout
SER.receivebyte(timeout) - reads if there is any byte sent in the
buffer and wait for the input upto timeout
Unless I'm missing something, a simple loop should be all you need:
import SER
def readline(timeout=36000):
line = ""
while 1:
ch = SER.receivebyte(timeout)
if ch < 0:
raise IOError("timeout")
if ch == 10:
break # stop collecting when we get LF
if ch == 13:
continue # ignore CR, in case we get CR+LF
line = line + chr(ch)
return line
Tweak as necessary.
(and before anyone pops up with a "better" way to do that, keep in mind
that the GM862 device uses a custom version of Python 1.5.2.)
</F>
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