From the device name this is is a USBTMC device, not a serial port. I've seen similar behavior in older linux kernels, you might have more luck
updating to a more recent kernel.
Guy Jennings
On Aug 2, 2013, at 10:36 AM, Eric Norum <[email protected]> wrote:
> Since you can communicate with the unit using simple shell commands I'm inferring that the unit presents itself as a USB-connected serial port. Standard StreamDevice + ASYN support should work fine.
>
> On Aug 2, 2013, at 5:42 AM, "Drube, Hardy" <[email protected]> wrote:
>
>> Dear all,
>>
>> I have some problems to establish a longer lasting connection with a Thorlabs PM100USB Powermeter.
>>
>> It is listed in /dev as usbtmc0 and I can communicate with it through echo –e. But this is only possible for one time. A second time echo –e won’t work. I have to disconnect and reconnect the USB-cable. Then again it will work one time.
>> Could you help me with this problem?
>>
>> Note: This device has two chips, the first one is a XILINX XCR3064XL (AD Converter) and the second a NXP LPC2387FBD100.
>>
>> Best regards,
>> Hardy Drube
>>
>
> --
> Eric Norum
> [email protected]
>
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