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copied!<p>Kermit is a serial communication app like minicom and it has its own script language, and I used it for some automatic upload on embedded devices. However, it is quite limited and/or buggy, so I finally switched to using python and pyserial.<br> Whenever you deal with texte mode, like AT command set or speaking to a shell over a serial line, it is really powerful.</p> <p>If I need to do binary transfer using some standard protocol, I usually use command line tools in non interactive mode, and spawn them from my python script.</p> <p>Here is some part of the tools I built : waiting for some input, sending data through xmodem, sending a command to u-boot and starting a transfer using the kermit protocol. I use it for automatic flashing and testing of embedded devices.</p> <pre><code>class Parser : def __init__(self, sport_name): self.currentMsg = '' if sport_name : self.ser = serial.Serial(sport_name, 115200) def WaitFor(self, s, timeOut=None): self.ser.timeout = timeOut self.currentMsg = '' while self.currentMsg.endswith(s) != True : # should add a try catch here c=self.ser.read() if c != '' : self.currentMsg += c sys.stdout.write(c) else : print 'timeout waiting for ' + s return False return True def XmodemSend(self,fname): if not self.WaitFor('C', 1) : print 'RomBOOT did not launch xmodem transfer' return self.ser.flushInput() self.ser.close() call(["xmodem","-d",self.ser.port,"-T",fname]) self.ser.open() def UbootLoad(self, fname): self.ser.write('loadb 0x20000000\n') if not self.WaitFor('bps...',1) : print 'loadb command failed' sys.exit() self.ser.flushInput() self.ser.close() retcode=call(['kermit','-y','kermit_init','-s',fname]) if retcode != 0 : print 'error sending' + fname sys.exit() self.ser.open() self.UbootCmd('echo\n') </code></pre>

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