Re: Pyserial never read
Hello i how can set with pyserial the following data? > byte delay= 4 > serial control line: > dtr = high > rts= low Thanks Luca -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyserial never read
Dennis Lee Bieber wrote:
dt = "D036EC"
print repr("".join([chr(int(dt[2*x:2*x+2],16)) for x in range(len(dt)//2)]))
>
> '\xd06\x00\x00\xec'
By the way, for future reference, this way beats the above hands down:
>>> import binascii
>>> binascii.unhexlify("D036EC")
'\xd06\x00\x00\xec'
-Peter
--
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Re: Pyserial never read
Hello ALSO... YOU NEVER SPECIFY A VARIABLE TO RECEIVE THE DATA -- ANYTHING YOU DO READ IS BEING DUMPED ON THE FLOOR! I see the read data with a sniffer. with the same serial caracteristic in delphi i obtain the right answer. I use serial writestr and serial readstr. If the serial package is anything like regular file I/O, that line will buffer/block until a new-line character is received, then return data upto/including the new-line. If the inbound data has multiple lines, you need individual readlines. For example i i send D036EC the right answer is D036ECFFBC35DC44 etc... i need new Line? why if i use ser.read(10) i see only the first 5 byte and not the rest, why if i use the inwaigth i answer that i have only 5 byte to read. Regards Luca -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyserial never read
Thanks for the info Grant. It'll teach me not to read the documentation :>) Sam -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyserial never read
On 2006-02-22, sam <[EMAIL PROTECTED]> wrote: > luca72 wrote: >> Thanks to all for the help, >> >> here you find the code, pls note if i use handshaking = 1 the >> application don't start. >> in the delphi configuratio of com port if i use or not handshaking the >> application work. >> Best Regards at all >> >> Luca >> >> import serial >> import win32file >> port = 2 > > Is port = 2 correct? Read the fine documentation at http://pyserial.sourceforge.net/: Parameters for the Serial class ser = serial.Serial( port=None, #number of device, numbering starts at #zero. if everything fails, the user #can specify a device string, note #that this isn't portable anymore #if no port is specified an unconfigured #an closed serial port object is created baudrate=9600, #baudrate bytesize=EIGHTBITS, #number of databits parity=PARITY_NONE, #enable parity checking stopbits=STOPBITS_ONE, #number of stopbits timeout=None, #set a timeout value, None for waiting forever xonxoff=0, #enable software flow control rtscts=0, #enable RTS/CTS flow control ) > I thought that com ports under windows are designated as a string > "com1","com2",..etc. You can use those as well, but they're non-portable. serial.Serial(port=0) will open the first serial port on either windows or linux. -- Grant Edwards grante Yow! Ha ha Ha ha Ha ha at Ha Ha Ha Ha -- When will I visi.comEVER stop HAVING FUN?!! -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyserial never read
luca72 wrote: > Thanks to all for the help, > > here you find the code, pls note if i use handshaking = 1 the > application don't start. > in the delphi configuratio of com port if i use or not handshaking the > application work. > Best Regards at all > > Luca > > import serial > import win32file > port = 2 Is port = 2 correct? I thought that com ports under windows are designated as a string "com1","com2",..etc. > baudrate = 38400 > bytesize =serial.EIGHTBITS > parity =serial.PARITY_ODD > stopbits =serial.STOPBITS_TWO > timeout = 1 > ser = serial.Serial(2, baudrate=38400, bytesize=8, > parity=serial.PARITY_ODD, stopbits=2, timeout=3) > ct = '' > ch = '' > a = self.textCtrl1.GetValue() > ind = 0 > ind1 = 2 > lunghezza = len(a) > while ind < lunghezza : > b = a[ind:ind1] > b = int(b,16) > b = ~b > c = ''.join([str((b >> Digit) & 1) for Digit in range(7, > -1, -1)]) > c1 = c[0:4] > c2 = c[4:] > c1 = c1[3:] + c1[2:3] + c1[1:2] + c1[0:1] > c2 = c2[3:] + c2[2:3] + c2[1:2] + c2[0:1] > c1 = hex(int(c1,2)) > c2 = hex(int(c2,2)) > c1 = c1[2:] > c2 = c2[2:] > c = c2+c1 > ct = ct + c > ind = ind + 2 > ind1 = ind1 + 2 > c = int(c,16) > c = chr(c) > ch = ch + c > > > ser.write(ch) > > elf.textCtrl2.SetValue(ct) > ser.readline() You might want to try using ser.read() instead of ser.readline() as you may not be getting linefeed carrage return characters . I usually setup a buffer to scan for the characters I expect. > > > > Pls.Note i hove also try with read(number of byte ) with inWaiting(), > flush etc > > > But no result. > > Thanks Luca Hope this helps Sam Schulenburg -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyserial never read
Well, I think it is better to start with some simple code first. Try to read serial port and print it out. something like this could work: import serial s = serial.Serial(port=2,baudrate=38400, timeout=20) while 1: print s.readline() Petr Jakes -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyserial never read
On 2006-02-22, Nick Craig-Wood <[EMAIL PROTECTED]> wrote: >> Anything's possible, but given that in his original post he says it >> works when he uses Delphi, it seems unlikely making a change to the >> hardware is necessary. > > Sorry missed that bit! > > Pyserial works very well in my experience (under linux). I've used it extensively under both Linux and Win32, and it works very well under both. > Serial ports are generally a pain though ;-) That's the truth. -- Grant Edwards grante Yow! Somewhere in Tenafly, at New Jersey, a chiropractor visi.comis viewing "Leave it to Beaver"! -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyserial never read
Thanks to all for the help, here you find the code, pls note if i use handshaking = 1 the application don't start. in the delphi configuratio of com port if i use or not handshaking the application work. Best Regards at all Luca import serial import win32file port = 2 baudrate = 38400 bytesize =serial.EIGHTBITS parity =serial.PARITY_ODD stopbits =serial.STOPBITS_TWO timeout = 1 ser = serial.Serial(2, baudrate=38400, bytesize=8, parity=serial.PARITY_ODD, stopbits=2, timeout=3) ct = '' ch = '' a = self.textCtrl1.GetValue() ind = 0 ind1 = 2 lunghezza = len(a) while ind < lunghezza : b = a[ind:ind1] b = int(b,16) b = ~b c = ''.join([str((b >> Digit) & 1) for Digit in range(7, -1, -1)]) c1 = c[0:4] c2 = c[4:] c1 = c1[3:] + c1[2:3] + c1[1:2] + c1[0:1] c2 = c2[3:] + c2[2:3] + c2[1:2] + c2[0:1] c1 = hex(int(c1,2)) c2 = hex(int(c2,2)) c1 = c1[2:] c2 = c2[2:] c = c2+c1 ct = ct + c ind = ind + 2 ind1 = ind1 + 2 c = int(c,16) c = chr(c) ch = ch + c ser.write(ch) elf.textCtrl2.SetValue(ct) ser.readline() Pls.Note i hove also try with read(number of byte ) with inWaiting(), flush etc But no result. Thanks Luca -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyserial never read
Peter Hansen <[EMAIL PROTECTED]> wrote: > Nick Craig-Wood wrote: > > luca72 <[EMAIL PROTECTED]> wrote: > > > >> Thanks for your help, but it don't solve the problem. > >> I receive only the echo and full stop. > > > > Try swapping pins 2 and 3 in the lead. > > Anything's possible, but given that in his original post he says it > works when he uses Delphi, it seems unlikely making a change to the > hardware is necessary. Sorry missed that bit! Pyserial works very well in my experience (under linux). Serial ports are generally a pain though ;-) -- Nick Craig-Wood <[EMAIL PROTECTED]> -- http://www.craig-wood.com/nick -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyserial never read
luca72 wrote: > Thanks for your help, but it don't solve the problem. > I receive only the echo and full stop. If you want help, you'll do better to post small pieces of code that you are actually using, rather than making us guess or imagine what you are doing. There are perhaps a dozen things that can go wrong with serial communications, and it's not efficient for us to start suggesting them one at a time... -Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyserial never read
Nick Craig-Wood wrote: > luca72 <[EMAIL PROTECTED]> wrote: > >> Thanks for your help, but it don't solve the problem. >> I receive only the echo and full stop. > > Try swapping pins 2 and 3 in the lead. Anything's possible, but given that in his original post he says it works when he uses Delphi, it seems unlikely making a change to the hardware is necessary. -Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyserial never read
luca72 <[EMAIL PROTECTED]> wrote: > Thanks for your help, but it don't solve the problem. > I receive only the echo and full stop. Try swapping pins 2 and 3 in the lead. -- Nick Craig-Wood <[EMAIL PROTECTED]> -- http://www.craig-wood.com/nick -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyserial never read
Thanks for your help, but it don't solve the problem. I receive only the echo and full stop. Many Thanks Best Regards Luca -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyserial never read
Hello, I'm not sure I understand precisely your question but maybe you can try a readline and a flushinput like that: import serial port= 0 # or the port where you're device is connected baudrate=9600 # or the baudrate of your device s = serial.Serial(port, baudrate) # Open the port for i in range(100): s.flushInput() line= s.readline() print line -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyserial never read
Thanks Luca -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyserial never read
I don't know alot about python but I could help you with english? eventhough it was really good best regards- Just -- http://mail.python.org/mailman/listinfo/python-list
Pyserial never read
Hello at all sorry for my english but i'm Italian. I use pyserial to communicate via rs232 with an extarnal device called smartmouse. I write the exact line that i want , but when i read i read only the echo ond not the other bytes. When i meke the same project with delphi i solve this problem with the call of the sleep. But in python it don't work. Have you got some ideas for solve my problem? Best Regards Luca -- http://mail.python.org/mailman/listinfo/python-list
