Experimental Physics and
Industrial Control System

Ooops.
Thanks for catching that.
I had no ‘large transfer’ pieces of equipment and clearly I missed a line!
Change and updated ChangeLog applied to subversion repository.


> On Nov 19, 2014, at 10:53 AM, Bruno Martins <[email protected]> wrote:
> 
> Hi all,
> 
> I'm using drvAsynUSBTMC to talk to a Tektronix scope and found a bug.
> 
> asynOctetRead (in drvAsynUSBTMC.c) tries to fill the passed 'data' pointer with data from 'pdpvt->bufp'. However, if 'maxchars' > 'pdpvt->bufCount'  a new packet will be requested from the USB driver and be saved to 'pdpvt->bufp'. Then, in the next 'for' loop iteration, 'data' will be overwritten. 
> 
> The fix is to increment 'data' pointer by the appropriate amount. A patch is attached.
> 
> 
> 
> Thanks,
> 
> Bruno
> <usbtmc.patch>

-- 
Eric Norum
[email protected]

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Bug in Asyn 4-23 drvAsynUSBTMC (with patch) Bruno Martins

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