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

Subject: Re: No monitor refresh
From: Hinko Kocevar <[email protected]>
To: [email protected]
Date: Tue, 11 May 2010 18:40:04 +0200
Hi all,

On 05/11/10 18:30, Hinko Kocevar wrote:
> Hello Mark,
> 
> On 05/11/10 18:17, Mark Rivers wrote:
>>>> As Ralph pointed out, you have set SCAN=I/O Intr.  For this to work
>> your
>>>> asyn port driver (called ENV in your case) must do callbacks to
>> device
>>>> support when it receives a new value.  Does this driver do so?
>>
>>> Yes it does. I can confirm that the value indeed does change in lower
>>> levels. Even caput response is showing new value. Also when
>> (re)starting
>>> the camonitor the first value shown is always prompt and correct!
>>
>> Those observations do not prove that your driver is doing calbacks when
>> a value changes.  They do prove that your driver is getting new values
>> OK, and that an asynInt32 read from the driver is working.  Your mbbi
>> record has PINI=YES, so it will do a real read from the driver once at
>> iocInit.  But unless your driver does callbacks to device support, then
>> it will not get any future values if SCAN=I/O Intr.  The proof will be
>> if SCAN="1 second" works, but "SCAN=I/O Intr" does not work.
>>
> 
> Interesting PINI stuff - the PINI field was added on top of the existing
> record definition by me, and I seem to be having trouble since. I can't
> really put my finger on it where the issue lies!
> 
> OK. So changing the SCAN field should prove this. Will try!

I've changed the SCAN field to '1 second' and now I get every value
change on camonitor!

Is this related to PINI field? I can recall that before adding PINI
fields to my records, I did not experience this behavior with the I/O
Intr scanned records.


Here is my interrupt code for I/O Intr records, should modify anything
to make it work with the I/O Intr?:


static void env_interrupt_int32_rec (void *drvPvt) {
	ELLLIST *pclientList;
	interruptNode *pnode;
	asynInt32Interrupt *pinterrupt;
	int command;
	drvLiberaPvt_t *pPvt;
	
	pPvt = (drvLiberaPvt_t *)drvPvt;
	assert(pPvt != NULL);
	DEBUG ("portName %s portmode %d\n", pPvt->portName, pPvt->conn_param.mode);

	pasynManager->interruptStart(pPvt->int32Pvt, &pclientList);
	pnode = (interruptNode *)ellFirst(pclientList);

	while (pnode) {
		pinterrupt = (asynInt32Interrupt*)pnode->drvPvt;
		pasynManager->getAddr(pinterrupt->pasynUser, &command);

		/*	Send individual interrupt to records holding defined value	*/			
		switch (command) {
			...

			case 725: {
				pinterrupt->callback (pinterrupt->userPvt, pinterrupt->pasynUser,
pPvt->env_data->agc);
				break;
			}

			...

			default: {
				DEBUG ("interrupt for command %d UNSUPPORTED!\n", command);
				break;
			}
		}
		pnode = (interruptNode *)ellNext(&pnode->node);
	}
	pasynManager->interruptEnd(pPvt->int32Pvt);
}


The env_interrupt_int32_rec() routine is called when an event from the
lower level is received - event signal the value change.

Best regards,
Hinko

> 
>> Note that if you wrote your asyn driver to inherit from asynPortDriver,
>> then getting callbacks to work would consist of setting a single bit in
>> a mask to the constructor, and calling "callParamCallbacks()" every time
>> your driver gets a new value for that input.  No need to worry about the
>> mechanics of doing the callbacks like I showed in my previous message.
> 
> The code is rather old and not written by me. I still need to poke
> around a bit to fully comprehend the driver code flow. I guess complete
> driver could be rewritten to eliminate the need to manually (in a loop)
> check statically assigned port numbers, and use more appropriate Asyn
> methods.
> 
> Thanks!
> 
> Best regards,
> Hinko
> 
> 
> 
>>
>> Mark
>>
>>
>> -----Original Message-----
>> From: Hinko Kocevar [mailto:[email protected]] 
>> Sent: Tuesday, May 11, 2010 11:08 AM
>> To: Mark Rivers
>> Cc: [email protected]
>> Subject: Re: No monitor refresh
>>
>> Hello Mark,
>>
>> On 05/11/10 16:55, Mark Rivers wrote:
>>> As Ralph pointed out, you have set SCAN=I/O Intr.  For this to work
>> your
>>> asyn port driver (called ENV in your case) must do callbacks to device
>>> support when it receives a new value.  Does this driver do so?
>>
>> Yes it does. I can confirm that the value indeed does change in lower
>> levels. Even caput response is showing new value. Also when (re)starting
>> the camonitor the first value shown is always prompt and correct!
>>
>>>
>>> You can get information about this by typing
>>>
>>> asynReport 10 ENV
>>
>> Here is the output - I've stripped 100 or more records not to clutter
>> the post.
>>
>> epics> asynReport 10 ENV
>> ENV multiDevice:Yes canBlock:No autoConnect:Yes
>>     enabled:Yes connected:Yes numberConnects 1
>>     nDevices 89 nQueued 0 blocked:No
>>     asynManagerLock:No synchronousLock:No
>>     exceptionActive:No exceptionUsers 0 exceptionNotifys 0
>>     interposeInterfaceList
>>         asynOctet pinterface 0x40086024 drvPvt 0x1b4c8
>>     interfaceList
>>         asynCommon pinterface 0x4003c548 drvPvt 0x2b710
>>         asynInt32 pinterface 0x4003c9ac drvPvt 0x2b710
>>         asynUInt32Digital pinterface 0x4003c990 drvPvt 0x2b710
>>         asynOctet pinterface 0x4003c964 drvPvt 0x2b710
>>
>> ...
>>
>>     addr 725 autoConnect Yes enabled Yes connected Yes exceptionActive
>> No
>>     exceptionActive No exceptionUsers 0 exceptionNotifys 0
>>     blocked No
>> ...
>>   Port: ENV
>>   lastAddress=0
>> epics>
>>
>>>
>>> That should show you what asyn clients (e.g. device support) have
>>> registered for callbacks on which interfaces.
>>>
>>> What happens if you change SCAN to "1 second"?
>>
>> Will try!
>>
>> Thank you for the help!
>>
>> Best regards,
>> Hinko
>>
>>
>>
>>>
>>> Mark
>>>
>>>
>>> -----Original Message-----
>>> From: [email protected]
>>> [mailto:[email protected]] On Behalf Of Hinko Kocevar
>>> Sent: Tuesday, May 11, 2010 9:07 AM
>>> To: [email protected]
>>> Subject: Re: No monitor refresh
>>>
>>> Hello Ralph,
>>>
>>> On 05/11/10 15:21, Ralph Lange wrote:
>>>> Hello Hinko,
>>>>
>>>> what EPICS versions are you using for client and IOC?
>>>
>>> IOC and client use 3.14.10 EPICS base version.
>>>
>>>> Can you show a dump (dbpr <name>, 4) of the record that you are
>>>> connecting to?
>>>
>>> Sure, here it is:
>>> epics> dbpr LIBERA01:ENV:ENV_AGC_MONITOR 4
>>> ACKS: NO_ALARM      ACKT: YES           ASG:                ASP:
>>> 0x00000000
>>> BKPT: 0x00          COSV: NO_ALARM      DESC: AGC           DISA: 0
>>>
>>> DISP: 0             DISS: NO_ALARM      DISV: 1             DPVT:
>>> 0x50c72c00
>>> DSET: 0x7c620840    DTYP: asynInt32     EIST:               EISV:
>>> NO_ALARM
>>> EIVL: 0x0           ELST:               ELSV: NO_ALARM      ELVL: 0x0
>>>
>>> EVNT: 0             FFST:               FFSV: NO_ALARM      FFVL: 0x0
>>>
>>> FLNK:CONSTANT 0     FRST:               FRSV: NO_ALARM      FRVL: 0x0
>>>
>>> FTST:               FTSV: NO_ALARM      FTVL: 0x0           FVST:
>>>
>>> FVSV: NO_ALARM      FVVL: 0x0           INP:INST_IO @asyn(ENV, 725,
>> 1.0)
>>>
>>> LALM: 1             LCNT: 0             LSET: 0xe8752e00    MASK:
>>> 4294967295
>>> MLIS: 0x38d0320060d0320003000000        MLOK: 0x28700b00    MLST: 1
>>>
>>> NAME: LIBERA01:ENV:ENV_AGC_MONITOR      NIST:               NISV:
>>> NO_ALARM
>>> NIVL: 0x0           NOBT: 0             NSEV: NO_ALARM      NSTA:
>>> NO_ALARM
>>> ONST: AUTO          ONSV: NO_ALARM      ONVL: 0x1           ORAW: 1
>>>
>>> PACT: 0             PHAS: 0             PINI: YES           PPN:
>>> 0x00000000
>>> PPNR: 0x00000000    PRIO: LOW           PROC: 0             PUTF: 0
>>>
>>> RDES: 0xa8a10300    RPRO: 0             RSET: 0x34b70a40    RVAL: 1
>>>
>>> SCAN: I/O Intr      SDEF: 1             SDIS:CONSTANT       SEVR:
>>> NO_ALARM
>>> SHFT: 0             SIML:CONSTANT       SIMM: NO            SIMS:
>>> NO_ALARM
>>> SIOL:CONSTANT       SPVT: 0x388a2f00    STAT: NO_ALARM      SVAL: 0
>>>
>>> SVST:               SVSV: NO_ALARM      SVVL: 0x0           SXST:
>>>
>>> SXSV: NO_ALARM      SXVL: 0x0           TEST:               TESV:
>>> NO_ALARM
>>> TEVL: 0x0           THST:               THSV: NO_ALARM      THVL: 0x0
>>>
>>> TIME: 2010-05-11 11:18:40.100440000     TPRO: 0             TSE: 0
>>>
>>> TSEL:CONSTANT       TTST:               TTSV: NO_ALARM      TTVL: 0x0
>>>
>>> TVST:               TVSV: NO_ALARM      TVVL: 0x0           TWST:
>>>
>>> TWSV: NO_ALARM      TWVL: 0x0           UDF: 0              UNSV:
>>> NO_ALARM
>>> VAL: 1              ZRST: MANUAL        ZRSV: NO_ALARM      ZRVL: 0x0
>>>
>>>
>>>> What field of that record are you connecting to?
>>>
>>> I did no specify any field - so it is VAL, I guess by default.
>>>
>>> Thank you!
>>>
>>> Regards,
>>> Hinko
>>>
>>>>
>>>> Regards,
>>>> Ralph
>>>>
>>>>
>>>> On Tue 11 May 2010 6:26:48 Hinko Kocevar wrote:
>>>>> Hi all,
>>>>>
>>>>> I'm experiencing some strange behavior when using camonitor against
>>> an
>>>>> EPICS IOC.
>>>>>
>>>>> For some reason a CA_PROTO_EVENT_ADD response from IOC to CA client
>>> does
>>>>> not arrive, or arrives several minutes later after the PV value has
>>>>> changed. Note that first CA_PROTO_EVENT_ADD response is seen always,
>>>>> only latter CA_PROTO_EVENT_ADD responses do not arrive (or arrive
>>> late)?!
>>>>> This behavior is not seen always - sometimes the IOC would promptly
>>>>> respond with CA_PROTO_EVENT_ADD response when needed.
>>>>>
>>>>> I can see the CA_PROTO_ECHO requests/responses fine on the same
>>>>> camonitor channel link, only CA_PROTO_EVENT_ADD response is not
>> seen.
>>>>>
>>>>> Inspecting the IOC I can see that the value did change (on lower
>>> levels)
>>>>> and caput response is also valid - updated with new value.
>>>>>
>>>>> I've ruled out the network problems, since the issue is raised even
>>> when
>>>>> using cross-over cable to communicate with the IOC. Actually even I
>>>>> update the value in the IOC shell, the camonitor is not refreshed!!
>>>>>
>>>>>
>>>>>
>>>>> Has someone experienced something similar?
>>>>> Are there some conditions that need to fulfilled in order for IOC to
>>>>> send a subsequent CA_PROTO_EVENT_ADD response(s)?
>>>>>
>>>>>
>>>>>
>>>>> TIA & HAND,
>>>>> Hinko
>>>>
>>>
>>>
>>
>>
> 
> 


-- 
Hinko Kocevar
Technical support software engineer
Instrumentation Technologies
Velika pot 22, SI-5250 Solkan - Slovenia
T:+386 5 3352600, F:+386 5 3352601
mailto: [email protected]

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Replies:
RE: No monitor refresh Mark Rivers
References:
Re: No monitor refresh Ralph Lange
Re: No monitor refresh Hinko Kocevar
RE: No monitor refresh Mark Rivers
Re: No monitor refresh Hinko Kocevar
RE: No monitor refresh Mark Rivers
Re: No monitor refresh Hinko Kocevar

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