[time-nuts] prologix device as sniffer

Prologix support at prologix.biz
Sun Jan 27 19:38:25 UTC 2008


Patrick,

Prologix GPIB-USB controller does not work as a GPIB bus sniffer. In DEVICE
mode the controller reads the bus only if it has previously been addressed
as a listener.

Regards,
Abdul


-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Patrick
Sent: Sunday, January 27, 2008 10:25 AM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] prologix device as sniffer

Hi Everyone

Thanks to all for helping me with my last post. I am now reading with my 
Prologix device.

I am just not sure that I am reading everything. I am trying to monitor 
the communication between a closed source App and some GPIB devices.

After I set up imported and set up serial with PySerial I tried this:

ser.write("++mode0\r\n")

x=1

def read3():
    while(x==1):
        print ser.read(1000)

I also tried print ser.readline()

I read the "ID" command sent out by the software but I could not read 
the response. Am I reading all the addresses with this set up or just 
one? Does anyone have some thoughts on why I don't read the response?

Thanks yet again in advance-patrick


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