Experimental Physics and
Industrial Control System

Hi Iain,

 

Is this a TCP port or a UDP port?

 

What arguments did you pass to drvAsynIPPortConfigure?  Did you leave the noProcessEos flag at the default of 0, or did you set it to 1?  You should leave it at 0.  This may seem counterintuitive, since you are presumably not setting an input EOS string for the binary payload data.  However, the asynInterposeEos does not just do EOS processing, it also does the buffering required to read a specific number of input bytes when that data might span multiple network packets.

 

Mark

 

 

 

I am running an AreaDetector program based off of Mythen.  The protocol is for the IOC to listen to a socket, first reading two headers, then the payload.  The headers appear to be read correctly, as the reported image size and byte count are correct.  However, the IOC usually doesn’t read the requested number of bytes; the number seems random, and on one occasion a full frame was read.  However, the return value and EOM value from asynOctetSyncIO are zero for the first payload transaction.  Future reads return a timeout, as corrupted headers result in large reads that are not met by the data source.  Is there a buffer option or similar I am missing?

 

Iain Marcuson

Software Engineer, Sydor Technologies

585.278.1168 | www.SydorTechnologies.com

Skype: iain.marcuson at sydorinstruments.com

 

 

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