Experimental Physics and
Industrial Control System

Yingbing Yan <[email protected]> · Mon, 28 May 2012 22:30:16 +0800

Hi Mark,

> What application produced that output?  Was it caget?
Yes, the output of caget. such as 
caget XX:image1:ArrayData 
XX:image1:ArrayData 921600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 ...

> I suspect your problem is that you have not set the environment
variable EPICS_CA_MAX_ARRAY_BYTES correctly. 
I have set this environment variable.

Yingbing

On Mon, 2012-05-28 at 14:20 +0000, Mark Rivers wrote:
> Hi Yingbing,
> 
> You showed the following output:
> 
> 1 0 0 0 0 0 ...
> 2 0 0 0 0 0 ...
> 
> What application produced that output?  Was it caget?
> 
> I suspect your problem is that you have not set the environment variable EPICS_CA_MAX_ARRAY_BYTES correctly.  You should set that to a value a little larger than the maximum array size you will use (in bytes).  It must be set in both the IOC application and on the channel access client.
> 
> To check if it is set correctly on the IOC you can use the following command at the IOC shell:
> 
> IepicsPrtEnvParams
> 
> To see if it is set correctly on the client end you can just use the following command at the Linux shell:
> 
> printenv | grep EPICS
> 
> 
> Mark
> 
> ________________________________________
> From: [email protected] [[email protected]] on behalf of Yingbing Yan [[email protected]]
> Sent: Monday, May 28, 2012 8:58 AM
> To: [email protected]
> Subject: NDArrayData Access
> 
> Dear all,
> 
> I want to implement a application via a costumed class, which inherits
> directly from the asynNDArrayDriver. It is similar with simDetector in
> the areaDetector, just skips the ADDriver.There is no error during
> compiling and running. The parameters (asynOctet, asynInt32,
> asynFloat64) can also be read & write using caget & caput. But I can not
> get the correct array data of NDArray object using NDStdArrays plugin,
> the output are just
> 1 0 0 0 0 0 ...
> 2 0 0 0 0 0 ...
> No matter how I modify the parameters or the source codes.
> 
> Finally, I try to use simDetector directly(the defalut ioc startup
> script), but the problem is similar, even using the prebuilt
> areaDetector.
> How to access the NDArrayData through NDStdArrays plugin? Are other
> configurations required?
> 
> 
> Best regards
> Yingbing
> 
> 

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System