[EMAIL PROTECTED] wrote: > Hi, I'm working on a project were a need to be able to upload firmware > to a microcontroller based Ethernet device. But because of the memory > constraints the controller can only handle packages of 300 bytes each > time. So therefore the firmware file must be sent in chunks and i need > a header in each file describing which part of the file it is I'm > sending. Could anyone give me some pointer on how a could accomplish > that in python? I'm talking about the client that uploads the software > to the device via TCP.
You can probably start here: http://docs.python.org/lib/socket-example.html If you're uncertain about the exact content of the transmitted messages, and has access to some other client program, you could write a Python server and see exactly what bit pattern the other client sends. Then you can write a Python client that behaves the same way. The basic pattern to split and transmit your file would probably be something like: f = open('filename') header_template = 'Chunk %05i, %03i bytes' for i, bytes in enumerate(f.read(max_number_of_bytes_per_chunk)): msg = header_template % (i, len(bytes)) msg += bytes sock.send(msg) sock.send('The end!') -- http://mail.python.org/mailman/listinfo/python-list
