Experimental Physics and
Industrial Control System

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<== Date ==>		<== Thread ==>

Subject:	Re:RE: help for streamDevice question
From:	张亚威 via Tech-talk <[email protected]>
To:	"Mark Rivers" <[email protected]>
Cc:	"[email protected]" <[email protected]>
Date:	Mon, 6 Jan 2020 11:43:39 +0800 (CST)

Sorry.

I want to send many socket packages to a device.

A single package consist of a 8 bytes time stamp(changeable), a 4 bytes protocol number, a 4 bytes determined number and a 8 bytes check code(changeable).

Time Stamp

Protocol

Vision

Command

Check Code

8 bytes

4 bytes

4 bytes

8 bytes

What I suppose is to use hex format to save the data.

So I write record like this:

record(waveform,"data")

{

field (DTVP, "stream")

field(INP, "@devTest.proto array_in L0")

field(FTVL, "LONG")

field(NELM, "256")

field(PINI, "YES")

field(SCAN, "Passive")

}

and proto file

data0 = 0x23;

array_in {

out "\${data0}";

in "%4x";

}

In this case, only determined data can be sent. I hope to sent some changeable data which produced by a python program in real-time.

Thank you very much.

YaweiZhang

At 2020-01-06 00:22:42, "Mark Rivers" <[email protected]> wrote:

I think you need to be more specific. What is the format of the strings you are trying to write and read?

Mark

From: Tech-talk <[email protected]> On Behalf Of ??? via Tech-talk
Sent: Sunday, January 5, 2020 8:22 AM
To: [email protected]
Subject: help for streamDevice question

hi，

I want to use streamDevice to communicate with a device just like https://epics.anl.gov/tech-talk/2016/msg01310.php does.

My problem is that I don't know how to write changeable data into record, which include time and a time-dependent encryption number.

Could someone give me a hand?

Thanks a lot.

Regards,

YaweiZhang

Replies:: Re: Re:RE: help for streamDevice question Mark Rivers via Tech-talk

References:: help for streamDevice question 张亚威 via Tech-talk; RE: help for streamDevice question Mark Rivers via Tech-talk

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ANJ, 06 Jan 2020

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System