xmodem

I am writing a program that requires the use of XMODEM to transfer data from a sensor device. I'd like to avoid having to write my own XMODEM code, so I was wondering if anyone knew if there was a python XMODEM module available anywhere? def xmodem_send(serial, file): t, anim = 0, '|/-\\' serial.setTimeout(1) while 1: if serial.read(1) != NAK: t = t + 1 print anim[t%len(anim)],'\r', if t == 60 : return False else: break p = 1 s = file.read(128) while s: s = s + '\xFF'*(128 - len(s)) chk = 0 for c in s: chk+=ord(c) while 1: serial.write(SOH) serial.write(chr(p)) serial.write(chr(255 - p))

I'm trying to transfer a file using the XMODEM protocol. I saw and did not understand the solution provided in: Can I use the xmodem protocol with PySerial? I saw xmodem package link . What is the value of size to be provided for the getc method? It is not assigned with any value given in the first link . When I use simple method as explained in the second link , I end up getting the error: No handlers could be found for logger "xmodem" . Here is my code to send the file. import serial from xmodem import XMODEM, CRC from time import sleep def getc(size, timeout=1): return port.read(size) def

I have a working connection with my serial device via PySerial, but I also want to transfer files via the xmodem protocol as part of my program. Which would be the most platform-neutral way to do this? Worst case, I could close() my serial.Serial object in Python and use subprocess to call upon /usr/bin/sb , but that seems inelegant. I'm currently on Ubuntu 9.10 and am using a USB-TTY adapter. Any ideas? There is xmodem module on PyPi. It takes two functions in constructor for reading and writing data, implement them to work with your opened serial port. Below is simple sample of its usage: