On 6 dec, 15:50, w...@mac.com wrote:
> On Dec 6, 2012, at 8:50 AM, Jean Dubois <jeandubois...@gmail.com> wrote:
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> > It seems there is some misunderstanding here. What I meant with how
> > to "do the equivalent in Python" refered to "reading characters
> > rather than lines".
> > I have written working code myself for another Keithleu which does use
> > RS232 for communication. The problem now is specifically for the new
> > Keithley which doesn't allow RS232 but only USB-communication over
> > usbtmc. So if the "buffer-problem" could be changed by reading
> > characters that would be great.
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> > regards,
> > Jean
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> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> Sorry about the misunderstanding (and subsequent waste of bandwidth).
> However, if you will look at the serial reads and writes in that handler, you
> will see that it does things like "serial.read(n)" where "n" is an explicit
> number, the number of bytes to be read from the serial buffer.
>
> -Bill
I tried changing measurementcurr=usbkeith.readline() to
measurementcurr=usbkeith.read(10000)
but this leads to trouble with the usbtmc-thing:
Measured current 1:
Traceback (most recent call last):
File "./keith2200rev2.py", line 26, in <module>
measurementvolt=usbkeith.read(10000)
IOError: [Errno 110] Connection timed out
and hereafter I need to restart the Keithley...:-(
regards,
Jean
--
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