Hey Rod,
Which IN converter should I use in the protocol file of StreamDevice?
I have tried %u and it didn't work:
record(waveform, "$(P)$(R)file") {
field(DTYP, "stream")
field(SCAN, "Passive")
field(INP, "@devTPS20xx.proto PrtScr $(PORT) $(A)")
field(NELM, "500000")
field(FTVL, "UCHAR")
}
PrtScr {
InTerminator = "";
ReplyTimeout = 15000;
out "HARDCOPY START";
in "%u";
}
L1 TPS2024B:file: Input
"BM╩7<00><00><00><00><00><00>6<04><00><00>(<00><00><00>@<01>..." does
not match format %u
On Mon, Apr 30, 2012 at 12:24 AM, Rod Nussbaumer <[email protected]
<mailto:[email protected]>> wrote:
In principle, you should be able to read the binary data just as if
you were receiving a binary formatted waveform. The EPICS waveform
record will need to be set to an unsigned char data type. The trick
will be to properly handle ending the transmission. Since your
Python code seems to use a timeout to determine the end of the file,
you could do that in streamDevice, too, by setting ' InTerminator =
"" ' & setting some reasonable number for the 'ReadTimeout' in the
protocol for the image file reader. Perhaps Dirk can confirm this.
You will need to set the NELM field to something large enough to
hold the largest image file that can be transmitted. I do not know
how you could automatically get the image data from the waveform
record into a file without some assistance from a host-based tool.
Rod Nussbaumer
ISAC Controls, TRIUMF
Vancouver, Canada.
Pavel Masloff wrote:
Why can't I?
In Hyperterminal (as well as in Python) you simply send a
command and
receive bytes, which you forward to a binary file. Sth like this:
|import sys
import os
import time
import serial
# create target file
print os.getcwd()
f = open('hardcopy.png', 'wb')
# configure the serial connection
ser = serial.Serial()
ser.port = 0
ser.timeout = 0
ser.baudrate = 9600
ser.open()
# configure the hardcopy settings
cmd = ':HARDCOPY:FORMAT PNG;PALETTE NORMAL;PORT RS232;LAYOUT
PORTRAIT;\
PREVIEW 0;INKSAVER 0;COMPRESSION 0\n'
a = ser.write(cmd)
print "bytes sent: {:d}".format(a)
# start hardcopy
a = ser.write("HARDCOPY START\n")
print "bytes sent: {:d}".format(a)
# begin receiving data and writing to file
total_bytes = 0;
a = ser.inWaiting()
while a>0:
time.sleep(0.5)
data = ser.read(a)
total_bytes += a
f.write(data)
time.sleep(0.5)
a = ser.inWaiting()
sys.stdout.write(".")
# close file and serial port
sys.stdout.write("\n")
f.close()
ser.close()
print "bytes read: {:d}".format(total_bytes)
print "script completed"|
Are you sure StreamDevice won't write the input to a waveform
record?
On Sun, Apr 29, 2012 at 7:47 PM, Mark Rivers
<[email protected] <mailto:[email protected]>
<mailto:[email protected].__edu
<mailto:[email protected]>>> wrote:
I don't think you can get the image into a waveform record
from the
scope with StreamDevice. You would have to write another driver
that does what you were doing with Hyperterminal and Python.
You
could perhaps use an SNL program for this.
To display an image in BOY you use the Intensity Plot
widget. The
waveform record is 1-D, but you tell the BOY widget the
actual X and
Y dimensions of the array.
Mark
__________________________________
From: Pavel Masloff [[email protected]
<mailto:[email protected]>
<mailto:pavel.masloff@gmail.__com <mailto:[email protected]>>]
Sent: Sunday, April 29, 2012 9:22 AM
To: Mark Rivers
Cc: EPICS Tech Talk
Subject: Re: [Scopes] BMP image record??
Is there any working example on how to get the image into a
waveform
record using StreamDevice? I haven't used the waveform
record yet,
reading up on this in the db reference manual, not that
comprehensible :(
Another question is how to read a waveform (image type) in BOY?
Pavel
On Sat, Apr 28, 2012 at 5:53 PM, Mark Rivers
<[email protected] <mailto:[email protected]>
<mailto:[email protected].__edu
<mailto:[email protected]>><mailto:rivers@cars.__uchicago.edu
<mailto:[email protected]>
<mailto:[email protected].__edu
<mailto:[email protected]>>>> wrote:
If you can get the image into a waveform record, using
streamDevice
for example, then you can display that waveform as in image
in EDM,
CSS BOY, ImageJ or other applications. You need to create a few
other records that tell the client what the actual image
dimensions are.
It may be just as easy to implement reading the actual waveforms
into waveform records, and display those with Cartesian plot
widgets
in your display manager.
Mark
__________________________________
From: [email protected]
<mailto:[email protected]>
<mailto:tech-talk-bounces@aps.__anl.gov
<mailto:[email protected]>><mailto:[email protected]
<mailto:[email protected]>
<mailto:tech-talk-bounces@aps.__anl.gov
<mailto:[email protected]>>>
[[email protected]
<mailto:[email protected]>
<mailto:tech-talk-bounces@aps.__anl.gov
<mailto:[email protected]>><mailto:[email protected]
<mailto:[email protected]>
<mailto:tech-talk-bounces@aps.__anl.gov
<mailto:[email protected]>>>] on behalf of Pavel Masloff
[[email protected] <mailto:[email protected]>
<mailto:pavel.masloff@gmail.__com
<mailto:[email protected]>><mailto:pavel.masloff@__gmail.com
<mailto:[email protected]>
<mailto:pavel.masloff@gmail.__com
<mailto:[email protected]>>>]
Sent: Saturday, April 28, 2012 2:17 AM
To: EPICS Tech Talk
Subject: [Scopes] BMP image record??
Hello again,
As I mentioned earlier we are running a series of
experiments with
our high current switches. I have written simple support
("...with a
little help from my friend" Dirk Zimoch) for the Tektronix
TPS2000
over RS232 using StreamDevice and ASYN, so now I can
remotely arm
the scopes, set its properties, save waveforms on to the CF
card,
etc. But...
In order to not run back and forth and see if everything went OK
(which is rather tiresome and time consuming), we need a
confirmation from the scopes. I don't want to deal with the
implementation of the waveform records for now, all I have
got so
far is that I save them on the flash card.
As such a confirmation I see transferring the BMP (or PNG) image
from the scope (sort of Print screen) on to the operator PC
somehow.
There is a special SCPI command "Hardcopy start". Which
mimics the
Print button on the scope's front panel. I have tried to
transfer a
BMP file via Hyperterminal (and Python script) and it worked out
well (more or less).
How could this be ported to the EPICS database from the IOC and
client standpoint, so an operator could see the oscillogram
on the
screen and decide whether the experiment went well, so she
will save
the waveforms and move on to the next experiment?
The image file is maximum ~ 46Kb (20Kb on average).
Any thoughts?
--
Best regards,
Pavel Maslov, MS
Controls Engineer at Pulsed power Lab
Efremov Institute for Electro-Physical Apparatus
St. Petersburg, Russia
Mobile: +7 (951) 672 22 19
Landline: +7 (812) 461 01 01
--
Best regards,
Pavel Maslov, MS
Controls Engineer at Pulsed power Lab
Efremov Institute for Electro-Physical Apparatus
St. Petersburg, Russia
Mobile: +7 (951) 672 22 19
Landline: +7 (812) 461 01 01
--
Best regards,
Pavel Maslov, MS
Controls Engineer at Pulsed power Lab
Efremov Institute for Electro-Physical Apparatus
St. Petersburg, Russia
Mobile: +7 (951) 672 22 19
Landline: +7 (812) 461 01 01
--
Best regards,
Pavel Maslov, MS
Controls Engineer at Pulsed power Lab
Efremov Institute for Electro-Physical Apparatus
St. Petersburg, Russia
Mobile: +7 (951) 672 22 19
Landline: +7 (812) 461 01 01
