Fwd: Fwd: Re: pl2303 linux driver does not work

Fwd: Fwd: Re: pl2303 linux driver does not work

[Batdelger.O]

Thank you for your quick response.
It's  just simple python code. I'm not sure if flow control is correct. 
I also used gtkterm and tried by every option.  I'm new at usbserial 
devices. How to know how should it be?

    import time
    import serial
    import sys

    ser = serial.Serial(
         port='/dev/ttyUSB0',
         baudrate=4800,
         parity=serial.PARITY_ODD,
         stopbits=serial.STOPBITS_ONE,
         bytesize=serial.EIGHTBITS,
         # timeout=0
    )

    # RTS 0 DTR 1. not sure it's correct one. I tried by reverse.
    ser.setRTS(False)
    ser.setDTR(True)


    print ser.isOpen()

    ON="\x1B\x5D"
    ser.write(ON)
    ser.flushOutput()
    print "after write"
    # read = ser.read()
    # sys.stdout.write("RECEIVED:" + read + "\n")
    ser.close()


-- 
Best regards,
Batdelger.O R&D engineer
Grapecity Mongolia LLC


On 2014.11.05 10:25, Greg KH wrote:
> On Wed, Nov 05, 2014 at 09:37:59AM +0800, Batdelger.O wrote:
>> Hello
>> Hope you guys are doing great.
>> I've got problem with pl2303 Linux driver. In a nutshell, my mission is to
>> control magnetic card reader/writer with PL-2303 XA / HXA chip from the
>> Linux. I'm using Ubuntu 14.04(kernel version: 3.13.0-39-generic). Everything
>> is going fine. Giving no errors. Writing data via usb-serial seems to work.
>> But the device is not receiving data. If that issue familiar with you,
>> please give me advice.
> How exactly are you "writing data"?  And have you set up flow control
> properly?
>
> thanks,
>
> greg k-h
>

-- 
Best regards,
Batdelger.O R&D engineer
Grapecity Mongolia LLC

Re: Fwd: Fwd: Re: pl2303 linux driver does not work

[Greg KH]

On Wed, Nov 05, 2014 at 12:11:00PM +0800, Batdelger.O wrote:
> 
> Thank you for your quick response.
> It's  just simple python code. I'm not sure if flow control is correct. I
> also used gtkterm and tried by every option.  I'm new at usbserial devices.
> How to know how should it be?
> 
>    import time
>    import serial
>    import sys
> 
>    ser = serial.Serial(
>         port='/dev/ttyUSB0',
>         baudrate=4800,
>         parity=serial.PARITY_ODD,
>         stopbits=serial.STOPBITS_ONE,
>         bytesize=serial.EIGHTBITS,
>         # timeout=0

That's a slow baud rate, do you mean that slow?

>    )
> 
>    # RTS 0 DTR 1. not sure it's correct one. I tried by reverse.
>    ser.setRTS(False)
>    ser.setDTR(True)

Does your device support hardware flow control?


> 
> 
>    print ser.isOpen()
> 
>    ON="\x1B\x5D"
>    ser.write(ON)
>    ser.flushOutput()
>    print "after write"
>    # read = ser.read()
>    # sys.stdout.write("RECEIVED:" + read + "\n")
>    ser.close()

Try using minicom to see if you can properly connect to your device
first, before trying to write your own code from "scratch", to determine
that the device works.

greg k-h

Re: Fwd: Fwd: Re: pl2303 linux driver does not work

[Batdelger.O]

> On Wed, Nov 05, 2014 at 12:11:00PM +0800, Batdelger.O wrote:
>> Thank you for your quick response.
>> It's  just simple python code. I'm not sure if flow control is correct. I
>> also used gtkterm and tried by every option.  I'm new at usbserial devices.
>> How to know how should it be?
>>
>>     import time
>>     import serial
>>     import sys
>>
>>     ser = serial.Serial(
>>          port='/dev/ttyUSB0',
>>          baudrate=4800,
>>          parity=serial.PARITY_ODD,
>>          stopbits=serial.STOPBITS_ONE,
>>          bytesize=serial.EIGHTBITS,
>>          # timeout=0
> That's a slow baud rate, do you mean that slow?
     Actually, baud rate is 9600. 4800 was one of my attempts.
>>     )
>>
>>     # RTS 0 DTR 1. not sure it's correct one. I tried by reverse.
>>     ser.setRTS(False)
>>     ser.setDTR(True)
> Does your device support hardware flow control?
> I think so. The Features section of device doc contains line: "Automatic hardware flow control with CTS/RTS
> ". But I'm not sure. How to know exactly it does?.
>
>>
>>     print ser.isOpen()
>>
>>     ON="\x1B\x5D"
>>     ser.write(ON)
>>     ser.flushOutput()
>>     print "after write"
>>     # read = ser.read()
>>     # sys.stdout.write("RECEIVED:" + read + "\n")
>>     ser.close()
> Try using minicom to see if you can properly connect to your device
> first, before trying to write your own code from "scratch", to determine
> that the device works.
     Device is working fine on windows 7. My simple python scripts is 
working fine without setting any options except port name (on win7).
>
> greg k-h
>

-- 
Best regards,
Batdelger.O R&D engineer
Grapecity Mongolia LLC

Re: Fwd: Fwd: Re: pl2303 linux driver does not work

[Greg KH]

On Thu, Nov 06, 2014 at 10:28:40AM +0800, Batdelger.O wrote:
> 
> >On Wed, Nov 05, 2014 at 12:11:00PM +0800, Batdelger.O wrote:
> >>Thank you for your quick response.
> >>It's  just simple python code. I'm not sure if flow control is correct. I
> >>also used gtkterm and tried by every option.  I'm new at usbserial devices.
> >>How to know how should it be?
> >>
> >>    import time
> >>    import serial
> >>    import sys
> >>
> >>    ser = serial.Serial(
> >>         port='/dev/ttyUSB0',
> >>         baudrate=4800,
> >>         parity=serial.PARITY_ODD,
> >>         stopbits=serial.STOPBITS_ONE,
> >>         bytesize=serial.EIGHTBITS,
> >>         # timeout=0
> >That's a slow baud rate, do you mean that slow?
>     Actually, baud rate is 9600. 4800 was one of my attempts.
> >>    )
> >>
> >>    # RTS 0 DTR 1. not sure it's correct one. I tried by reverse.
> >>    ser.setRTS(False)
> >>    ser.setDTR(True)
> >Does your device support hardware flow control?
> I think so. The Features section of device doc contains line: "Automatic hardware flow control with CTS/RTS
>". But I'm not sure. How to know exactly it does?.

You usually need to set this up on the device itself.  The manual for
the device should say how to do this.

> >>
> >>    print ser.isOpen()
> >>
> >>    ON="\x1B\x5D"
> >>    ser.write(ON)
> >>    ser.flushOutput()
> >>    print "after write"
> >>    # read = ser.read()
> >>    # sys.stdout.write("RECEIVED:" + read + "\n")
> >>    ser.close()
> >Try using minicom to see if you can properly connect to your device
> >first, before trying to write your own code from "scratch", to determine
> >that the device works.
>     Device is working fine on windows 7. My simple python scripts is working
> fine without setting any options except port name (on win7).

Again, please try running minicom on Linux which sets up the line
settings in a "known manner" before blaming the kernel driver :)

thanks,

greg k-h

RE: Fwd: Fwd: Re: pl2303 linux driver does not work

[Batdelger.O]

I'm sorry. E-mail subject was wrong. I just wanted to find good direction.
Ok, I'll try by minicom. 
-- 
Best regards,

Batdelger.O R&D engineer
Grapecity Mongolia

-----Original Message-----
From: Greg KH [mailto:greg@kroah.com] 
Sent: Thursday, November 6, 2014 11:36 AM
To: Batdelger.O
Cc: linux-serial@vger.kernel.org
Subject: Re: Fwd: Fwd: Re: pl2303 linux driver does not work

On Thu, Nov 06, 2014 at 10:28:40AM +0800, Batdelger.O wrote:
> 
> >On Wed, Nov 05, 2014 at 12:11:00PM +0800, Batdelger.O wrote:
> >>Thank you for your quick response.
> >>It's  just simple python code. I'm not sure if flow control is 
> >>correct. I also used gtkterm and tried by every option.  I'm new at
usbserial devices.
> >>How to know how should it be?
> >>
> >>    import time
> >>    import serial
> >>    import sys
> >>
> >>    ser = serial.Serial(
> >>         port='/dev/ttyUSB0',
> >>         baudrate=4800,
> >>         parity=serial.PARITY_ODD,
> >>         stopbits=serial.STOPBITS_ONE,
> >>         bytesize=serial.EIGHTBITS,
> >>         # timeout=0
> >That's a slow baud rate, do you mean that slow?
>     Actually, baud rate is 9600. 4800 was one of my attempts.
> >>    )
> >>
> >>    # RTS 0 DTR 1. not sure it's correct one. I tried by reverse.
> >>    ser.setRTS(False)
> >>    ser.setDTR(True)
> >Does your device support hardware flow control?
> I think so. The Features section of device doc contains line: 
>"Automatic hardware flow control with CTS/RTS ". But I'm not sure. How to
know exactly it does?.

You usually need to set this up on the device itself.  The manual for the
device should say how to do this.

> >>
> >>    print ser.isOpen()
> >>
> >>    ON="\x1B\x5D"
> >>    ser.write(ON)
> >>    ser.flushOutput()
> >>    print "after write"
> >>    # read = ser.read()
> >>    # sys.stdout.write("RECEIVED:" + read + "\n")
> >>    ser.close()
> >Try using minicom to see if you can properly connect to your device 
> >first, before trying to write your own code from "scratch", to 
> >determine that the device works.
>     Device is working fine on windows 7. My simple python scripts is 
> working fine without setting any options except port name (on win7).

Again, please try running minicom on Linux which sets up the line settings
in a "known manner" before blaming the kernel driver :)

thanks,

greg k-h