On 2004-11-26, alastair <[EMAIL PROTECTED]> wrote: > When I send the data on windows everything is ok - on Linux I get the > following traceback: > > Traceback (most recent call last): > ... > File "/home/pythonCode/loader.py", line 155, > in serialWrite > ser.write(buffer) > File "/usr/lib/python2.3/site-packages/serial/serialposix.py", line > 288, in write > n = os.write(self.fd, d) > OSError: [Errno 11] Resource temporarily unavailable
A patch that fixes this is available from the pyserial SF site. > Can anyone offer any pointers as to why this should happen ? It happens because the serial device driver returns -11. The Regular serial (16x50) driver doesn't do this and will buffer up to 4K, then block. For reasons known only to their authors, some serial drivers don't behave like that. If you try to write more than they can immediately send to the HW (a dozen or two bytes in the case I ran across with a Prolific USB->serial widget), they take as much as they can send and return immediately. If you then try to write more data, you get a return of -11. > I first thought that it might be because I was using binary > data, but the same happens when I tried a large ASCII data > file. Any ideas for a workaround appreciated :) Here's the bug: http://sourceforge.net/tracker/index.php?func=detail&aid=1043420&group_id=46487&atid=446302 Here's the patch: http://sourceforge.net/tracker/index.php?func=detail&aid=1043436&group_id=46487&atid=446304 -- Grant Edwards grante Yow! TATTOOED MIDGETS at are using ALFREDO in their visi.com SALAMI FACTORY! -- http://mail.python.org/mailman/listinfo/python-list
