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ID Date Author Topicdown Subject
  551   13 Jan 2009 Stefan RittForummlogger problem
> Sorry for being vague. I cleaned up the ODB, but it doesn't seem to be the
> problem. Here is a sample run of mlogger and gdb:

Thanks for the info, that explained the problem. It is related to the lines

rargv[rargc] = (char *)malloc(3);
rargv[rargc++] = "-b";

where one first allocates some memory (3 bytes), but then overwrites the pointer with 
another pointer to some static memory ("-b"). The following

free(rargv[1]);

then tries to free the static memory which fails.

The problem was already fixed some time ago, so please update your version from the SVN 
revision (see https://midas.psi.ch/download.html for details).
  554   14 Jan 2009 Konstantin OlchanskiForummlogger problem
> The problem was already fixed some time ago, so please update your version from the SVN 
> revision (see https://midas.psi.ch/download.html for details).

I wanted to check out the latest websvn midas repository viewer installed at PSI, so I used the web "annotate/blame" tools 
to trace the fix to this bug down to revision 3660 committed in April 2007. (It turns out that "svn blame" is not very useful 
for tracing *removed* lines, so I ended up doing a manual binary search across different revisions of mlogger.c)

K.O.
  560   26 Jan 2009 Derek EscontriasForumQuestion - ODB access from a custom page
Hi, I am looking for a way to mutate ODB values from a custom page. I have been
using the edit attribute for the 'odb' tag, but for some things it would be nice
if a form can handle the change. I have seen references to ODBSet on the forums,
but I haven't been able to find documentation on it. Is there an available
Javascript library for Midas and/or are there more tags than I am aware of (I am
only aware of the 'odb' tag)?
  561   27 Jan 2009 Suzannah DavielForumQuestion - ODB access from a custom page
At present the only documentation on the Javascript library is in this elog
e.g. Message 496 31 Jul 08

The Javascript library which you can view
http://<your mhttpd host>/mhttpd.js
now supports ODBEdit as well as ODBGet and ODBSet
 
I advise you get the latest version of mhttpd.c so you can use ODBEdit which changes
the ODB value directly via ODBSet.

You use it like this:
document.write('<a href="#" onclick="ODBEdit(/Equipment/test/Variables/Demand[0])">');
document.write('<odb src="/Equipment/test/Variables/Demand[0]">');
document.write('</a>');

You can also use HTML to edit the variables, but the advantage of Javascript is that
you can use variable ODB paths, so it is more powerful.

Here is an example of using a form on a custom page to edit a variable (in the
example, the run number) using Javascript (ODBEdit) and HTML. 

To try this example, in ODB, create key (STRING)
/custom/try& 
 and set it to "/home/user/try.html"

where the path of the example code on the disk is  /home/user/try.html

This will put an alias link on the Main Status page called "try" which you click on
to see the custom page.

Code of try.html:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 TRANSITIONAL//EN">
<html><head>
<title> ODBEdit test</title>
<script src="/js/mhttpd.js" type="text/javascript"></script>

<script type="text/javascript">
var my_action = '"/CS/try&"'
var rn
var path

document.write('</head><body>')
document.write('<form method="get" name="form2" action='+my_action+'> ') 
document.write('<input name="exp" value="'+my_expt+'" type="hidden">');

document.write('Using Javascript and ODBEdit:
')
path='/runinfo/run number' 
rn = ODBGet(path)
document.write('Run Number: '+rn+'
')
document.write('Edit Run Number:')
document.write('<a href="#" onclick="ODBEdit(path)" >')
document.write(rn)
document.write('</a>');
document.write('
') ;
</script>


Using HTML :


Using edit=2 ...  Run Number:
<odb src="/runinfo/run number" edit=2>


Using edit=1 ...  Run Number:
<odb src="/runinfo/run number" edit=1>


</form>
</html>


Note the "edit=2" feature is handy so that you can use Javascript or HTML on your
page and the user sees no difference.


> Hi, I am looking for a way to mutate ODB values from a custom page. I have been
> using the edit attribute for the 'odb' tag, but for some things it would be nice
> if a form can handle the change. I have seen references to ODBSet on the forums,
> but I haven't been able to find documentation on it. Is there an available
> Javascript library for Midas and/or are there more tags than I am aware of (I am
> only aware of the 'odb' tag)?
  563   04 Mar 2009 Dawei LiuForumAnalyzer gets killed cm_watchdog
Hello Midas experts:

We have setup a DAQ using MIDAS to readout two ADCs in the crate.
We are running into problem of analyzer getting killed between 
runs.  Sometimes it would crash after a few runs and sometimes it 
would go on for many many runs before analyzer gets killed.  It always 
occurred between runs not when we are taking data.  Any suggestions 
on what we could try?  The error message from the midas.log file is 
appended below.

Thanks,

Dawei

Wed Mar  4 11:53:11 2009 [Analyzer,ERROR] [midas.c:1739:,ERROR]
cm_disconnect_experiment not called at end of program
Wed Mar  4 11:53:22 2009 [mhttpd,INFO] Client 'Analyzer' on buffer 'SYSMSG'
removed by cm_watchdog (idle 10.7s,TO 10s)
Wed Mar  4 11:53:22 2009 [mhttpd,INFO] Client 'Analyzer' (PID 1) on buffer 'ODB'
removed by cm_watchdog (idle 10.7s,TO 10s)
Wed Mar  4 11:53:22 2009 [AL Experiment Frontend,INFO] Client 'Analyzer' on
buffer 'SYSTEM' removed by cm_watchdog (idle 10.9s,TO 10s)
Wed Mar  4 11:53:29 2009 [AL Experiment Frontend,TALK] starting new run
Wed Mar  4 11:53:29 2009 [AL Experiment Frontend,ERROR]
[midas.c:8264:rpc_client_check,ERROR] Connection broken to "Analyzer" on host
tsunami
  564   24 Mar 2009 Stefan RittForumAnalyzer gets killed cm_watchdog
Hi,

your log script sound to me like the analyzer either got into an infinite loop or 
did a segment violation and just died. I would recommend to run the analyzer from 
inside the debugger. When you then get the segment violation, you can inspect the 
stack trace and see where the bad things happen. Since the analyzer works nicely in 
other experiment, I expect that your problem is related to the user code. Maybe it 
happens at the end of the run, but there is a timeout before the crashed process 
gets cleaned from the ODB, that's why you might think that it happens "between" 
runs.

Best regards,

  Stefan

> 
> Hello Midas experts:
> 
> We have setup a DAQ using MIDAS to readout two ADCs in the crate.
> We are running into problem of analyzer getting killed between 
> runs.  Sometimes it would crash after a few runs and sometimes it 
> would go on for many many runs before analyzer gets killed.  It always 
> occurred between runs not when we are taking data.  Any suggestions 
> on what we could try?  The error message from the midas.log file is 
> appended below.
> 
> Thanks,
> 
> Dawei
> 
> Wed Mar  4 11:53:11 2009 [Analyzer,ERROR] [midas.c:1739:,ERROR]
> cm_disconnect_experiment not called at end of program
> Wed Mar  4 11:53:22 2009 [mhttpd,INFO] Client 'Analyzer' on buffer 'SYSMSG'
> removed by cm_watchdog (idle 10.7s,TO 10s)
> Wed Mar  4 11:53:22 2009 [mhttpd,INFO] Client 'Analyzer' (PID 1) on buffer 'ODB'
> removed by cm_watchdog (idle 10.7s,TO 10s)
> Wed Mar  4 11:53:22 2009 [AL Experiment Frontend,INFO] Client 'Analyzer' on
> buffer 'SYSTEM' removed by cm_watchdog (idle 10.9s,TO 10s)
> Wed Mar  4 11:53:29 2009 [AL Experiment Frontend,TALK] starting new run
> Wed Mar  4 11:53:29 2009 [AL Experiment Frontend,ERROR]
> [midas.c:8264:rpc_client_check,ERROR] Connection broken to "Analyzer" on host
> tsunami
  565   17 Apr 2009 Jimmy NgaiForumMIDAS mhttpd custom page questions
Dear All,

I have created a custom page (please see the attachment) and imported into 
MIDAS with key name "Control panel&" (without the ""). I have the following 
two questions:

1) I display the status of the run with <odb src="/Runinfo/State">, but it 
returns numbers which is not user friendly. How can I make something 
like "Running" with green background and "Stopped" with red background in the 
default status page?

2) When I click either Start/Stop/Pause/Resume, it can performs the right 
things, but afterward it jumps to the page "http://domain.name:8081/CS/" which 
shows "Invalid custom page: NULL path". How can I make it returns to the 
correct page "http://domain.name:8081/CS/Control%20panel"?

Thank you for your attention.

Best Regards,
Jimmy
  566   20 Apr 2009 Jimmy NgaiForumMIDAS mhttpd custom page questions
Dear All,

I have one more question. I use <odb src="odb field" edit=1> to display an 
editable ODB value, but how can I show this value in hexadecimal?

Thanks.

Best Regards,
Jimmy


> Dear All,
> 
> I have created a custom page (please see the attachment) and imported into 
> MIDAS with key name "Control panel&" (without the ""). I have the following 
> two questions:
> 
> 1) I display the status of the run with <odb src="/Runinfo/State">, but it 
> returns numbers which is not user friendly. How can I make something 
> like "Running" with green background and "Stopped" with red background in the 
> default status page?
> 
> 2) When I click either Start/Stop/Pause/Resume, it can performs the right 
> things, but afterward it jumps to the page "http://domain.name:8081/CS/" which 
> shows "Invalid custom page: NULL path". How can I make it returns to the 
> correct page "http://domain.name:8081/CS/Control%20panel"?
> 
> Thank you for your attention.
> 
> Best Regards,
> Jimmy
  567   06 May 2009 Stefan RittForumMIDAS mhttpd custom page questions
> 1) I display the status of the run with <odb src="/Runinfo/State">, but it 
> returns numbers which is not user friendly. How can I make something 
> like "Running" with green background and "Stopped" with red background in the 
> default status page?

Sorry my late reply, I was really busy. You need JavaScript to perform such a 
task. See the attached example.

> 2) When I click either Start/Stop/Pause/Resume, it can performs the right 
> things, but afterward it jumps to the page "http://domain.name:8081/CS/" 
> which shows "Invalid custom page: NULL path". How can I make it returns 
> to the correct page "http://domain.name:8081/CS/Control%20panel"?

You add a hidden redirect statement:

  <input type=hidden name=redir value="CS/Control panel">

Best regards,

  Stefan
  568   06 May 2009 Stefan RittForumMIDAS mhttpd custom page questions
> I have one more question. I use <odb src="odb field" edit=1> to display an 
> editable ODB value, but how can I show this value in hexadecimal?

Again with JavaScript:

  var v = ODBGet('/some/path&format=%X');

this will retrieve /some/path and format it in hexadecimal. Then you can set a table 
cell with "v" as I wrote in the last reply. If you want to change this value 
however, you need to encode this yourself in JavaScript.

- Stefan
  594   15 Jun 2009 Jimmy NgaiForumTime limit of each run
Dear All,

Can one set a time limit for each run? I can only find event limit in ODB. 
Thanks.

Jimmy
  598   24 Jun 2009 Razvan Stefan GorneaForumFrontend and manual trigger question
Hi,

I have a question related to the frontend and I would need some suggestions
about the proper way of doing things in Midas.

I have some CAEN ADC boards and a VME interface and I made a simple frontend
that configures and reads the system and it works great ... Now I would like to
add a feature and it seems to me I am going the wrong way.

I would like to add manual trigger capability and so I added the EQ_MANUAL_TRIG
flag to the "CAEN" equipment type but the problem is that the framework calls
directly the readout function on "Midas manual trigger". To trigger manually the
CAEN ADC's I have to write some registers and therefore I either need to have a
function called before the readout function or be able in the readout function
to know if the call has been triggered by the poll function or "Midas manual
trigger". I tried to check the value *((DWORD *)pevent) but it seems to be a
well defined and meaningful value only when the readout function call is
triggered by the poll function.

So my question is what's the proper "Midas way" of doing this? Should I create a
new equipment which is of EQ_MANUAL_TRIG type and its readout function writes
the registers on the CAEN ADC's to trigger manually the boards? Is there a way
of "mapping" the Midas manual trigger to a "trigger generator function"? Because
I am a little bit confused ... Is the Midas manual trigger on the new equipment
(let's say "Manual trigger manager") going to increment the event ID? Then when
the event is really read through the readout function of the "CAEN" equipment
the event ID is going to be incremented again obviously ... 

Thanks a lot,
Razvan
  600   25 Jun 2009 Stefan RittForumFrontend and manual trigger question
> I would like to add manual trigger capability and so I added the EQ_MANUAL_TRIG
> flag to the "CAEN" equipment type but the problem is that the framework calls
> directly the readout function on "Midas manual trigger". To trigger manually the
> CAEN ADC's I have to write some registers and therefore I either need to have a
> function called before the readout function or be able in the readout function
> to know if the call has been triggered by the poll function or "Midas manual
> trigger". I tried to check the value *((DWORD *)pevent) but it seems to be a
> well defined and meaningful value only when the readout function call is
> triggered by the poll function.

Actually there is no way to figure out if your readout function is called normally or 
manually triggered. So I modified the framework to add this functionality. In your 
readout routing you can how call

  flag = DATA_SIZE(pevent);

If flag is zero, this is a normal call, if it's one, it's a manual trigger. To get 
this functionality, you have to update midas.h and mfe.c from the repository (rev. 
4519).
  604   02 Jul 2009 Dawei LiuForumData taking hangs in the middle of run
Hi,

We are using midas to read ADC. It sometimes hung in the middle of data taking.
We tried to disable analyzer and only run with frontend. The problem still
exists. We tried to use different crate, different CAMAC controller and
different ADC module. All these did not solve the problem. We use polled method
to read data. We have dataway display unit so we know that it hung always after
it executed CAMAC command F9, which is after finishing one data taking and clear
the ADC for the next data taking. The data rate is about 1 KHz. It is random for
how long it takes for the system to hang.

Any ideas ?

Thanks,

Dawei Liu
  605   03 Jul 2009 Pierre-Andre AmaudruzForumData taking hangs in the middle of run
Hi Dawei,

Could you give more info on your setup:
- CAMAC controller model
- ADC model
- LAM setting
- Mode of polling (on module or on CC)
- Are you still going through the poll_event() after hang up?
- Do you have the same problem at low rate (100Hz)?

Pierre-André
> Hi,
> 
> We are using midas to read ADC. It sometimes hung in the middle of data taking.
> We tried to disable analyzer and only run with frontend. The problem still
> exists. We tried to use different crate, different CAMAC controller and
> different ADC module. All these did not solve the problem. We use polled method
> to read data. We have dataway display unit so we know that it hung always after
> it executed CAMAC command F9, which is after finishing one data taking and clear
> the ADC for the next data taking. The data rate is about 1 KHz. It is random for
> how long it takes for the system to hang.
> 
> Any ideas ?
> 
> Thanks,
> 
> Dawei Liu
  606   06 Jul 2009 Dawei LiuForumData taking hangs in the middle of run
Hi Pierr-Andre,


> Hi Dawei,
> 
> Could you give more info on your setup:
> - CAMAC controller model

Jorway 73A, we have three in hand and the problem doesn't depend on which controller
we were using.

> - ADC model

LeCroy 2249W. We also tried two other modules LeCroy 2249A. Same problem.

> - LAM setting

The poll and ADC reading codes are basically from Midas distribution.

> - Mode of polling (on module or on CC)

Polling on CC. I also tried to add a timeout code reading ADC, didn't solve the problem.

> - Are you still going through the poll_event() after hang up?

That's I don't know. I believe the problem happens between finishing reading one event
and passing the control back to poll_event.

> - Do you have the same problem at low rate (100Hz)?

The rate we are currently running is about 400 Hz, it has the same problem. We will
try lower rate more.

Thanks,

Dawei

> 
> Pierre-André
> > Hi,
> > 
> > We are using midas to read ADC. It sometimes hung in the middle of data taking.
> > We tried to disable analyzer and only run with frontend. The problem still
> > exists. We tried to use different crate, different CAMAC controller and
> > different ADC module. All these did not solve the problem. We use polled method
> > to read data. We have dataway display unit so we know that it hung always after
> > it executed CAMAC command F9, which is after finishing one data taking and clear
> > the ADC for the next data taking. The data rate is about 1 KHz. It is random for
> > how long it takes for the system to hang.
> > 
> > Any ideas ?
> > 
> > Thanks,
> > 
> > Dawei Liu
  607   08 Jul 2009 Konstantin OlchanskiForumjorway73a.c, Data taking hangs in the middle of run
> > Could you give more info on your setup:
> > - CAMAC controller model
> Jorway 73A, we have three in hand and the problem doesn't depend on which controller
> we were using.

Dawei sent me a copy of his jorway73a.c scsi-camac driver. It is quite different from the
file in the MIDAS distribution. Dawei tells me that the file from the MIDAS distribution
does not compile. Stack traces from Dawei indicate a hang in this modified jorway73a.c
scsi-camac driver.

K.O.
  608   18 Jul 2009 Exaos LeeForumjorway73a.c, Data taking hangs in the middle of run
> > > Could you give more info on your setup:
> > > - CAMAC controller model
> > Jorway 73A, we have three in hand and the problem doesn't depend on which controller
> > we were using.
> 
> Dawei sent me a copy of his jorway73a.c scsi-camac driver. It is quite different from the
> file in the MIDAS distribution. Dawei tells me that the file from the MIDAS distribution
> does not compile. Stack traces from Dawei indicate a hang in this modified jorway73a.c
> scsi-camac driver.
> 
> K.O.

I encountered too that the jorway73a.c cannot work for my SCM-301 CAMAC driver. The
"jorway73a.c" distributed with MIDAS seems to work with Jorway 73a reversion > 300. But my
module has the reversion number 203. :-( I hope you can paste the modified version here so
that I can try it if I have spare time.
Regards.
  609   03 Aug 2009 Exaos LeeForumHow to distinguish the status and value returned from "mvme_read_value(...)"
The definition of mvme_read_value is as the following:
unsigned int EXPRT mvme_read_value(MVME_INTERFACE * vme, mvme_addr_t vme_addr);

Read single data from VME bus. Useful for register access. See example in
mvme_open()

Parameters:
    	*vme 	  VME structure
    	vme_addr  source address (VME location).

Returns:
    MVME_SUCCESS


Question: How to distinguish the status and value returned? Should the definition be something like
int EXPRT mvme_read_value(MVME_INTERFACE *mvme, mvme_addr_t vme_addr, unsigned int *var);
  610   03 Aug 2009 Stefan RittForumHow to distinguish the status and value returned from "mvme_read_value(...)"

Exaos Lee wrote:
The definition of mvme_read_value is as the following:
unsigned int EXPRT mvme_read_value(MVME_INTERFACE * vme, mvme_addr_t vme_addr);

Read single data from VME bus. Useful for register access. See example in
mvme_open()

Parameters:
    	*vme 	  VME structure
    	vme_addr  source address (VME location).

Returns:
    MVME_SUCCESS


Question: How to distinguish the status and value returned? Should the definition be something like
int EXPRT mvme_read_value(MVME_INTERFACE *mvme, mvme_addr_t vme_addr, unsigned int *var);


This function is a shortcut when you want something like
  printf("%d\n", mvme_read_value(...));

and you know that the status is ok. Without this function, you would need to define a variable
  unsigned long d;
  mvme_read_value(..., &d);
  printf("%d\n", d);

so the above function is just a handy shortcut. If you want to see the status however, you can call the "normal" function mvme_read:
  status = mvme_read(..., &d, adr, 4);
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