答复: ADMythen --acquisition issues

[zhaoying via Tech-talk <tech-talk@aps.anl.gov>]

Hi Mark,

According to your suggestions, we have change the way to get our debugging output :

printf("nread_expected=%d, nread=%d, status=%d, timeout=%f, eomReason=%d\n", nread_expect, nread, status, M1K_TIMEOUT+acquireTime, eomReason);

 

the results is as follows:

 

epics> nread_expected = 25600      nread = 1400, status = 0, timeout = 8.000000, eomReason = 0

nread_expected = 25600         nread = 1352, status = 0, timeout = 8.000000, eomReason = 0

nread_expected = 25600         nread = 1448, status = 0, timeout = 8.000000, eomReason = 0

nread_expected = 25600         nread = 1400, status = 0, timeout = 8.000000, eomReason = 0

nread_expected = 25600         nread = 1352, status = 0, timeout = 8.000000, eomReason = 0

nread_expected = 25600         nread = 1352, status = 0, timeout = 8.000000, eomReason = 0

nread_expected = 25600         nread = 1448, status = 0, timeout = 8.000000, eomReason = 0

nread_expected = 25600         nread = 1448, status = 0, timeout = 8.000000, eomReason = 0

nread_expected = 25600         nread = 1448, status = 0, timeout = 8.000000, eomReason = 0

nread_expected = 25600         nread = 400, status = 0, timeout = 8.000000, eomReason = 0

nread_expected = 25600         nread = 4, status = 0, timeout = 8.000000, eomReason = 0

Acquisition finish

ADAcquire Callback

epics>

 

 

still nread  does not equal “nread_expected”. What should we do next? Please give us some suggestions.

 

Thank you !

 

----Ying

 

发件人: Mark Rivers [mailto:rivers@cars.uchicago.edu]
发送时间: 2018年11月30日 22:20
收件人: 'zhaoying' <zhaoying@sinap.ac.cn>
抄送: tech-talk@aps.anl.gov
主题: RE: ADMythen --acquisition issues

 

Hi Ying,

 

I believe you uncommented this line to get your debugging output:

 

//printf("nread_expected = %d\tnread = %d\n", nread_expect,nread);

 

Can you please change that to:

printf("nread_expected=%d, nread=%d, status=%d, timeout=%f, eomReason=%d\n", nread_expect, nread, status, M1K_TIMEOUT+acquireTime, eomReason);

 

That will show more information returned by pasynOctetSyncIO->writeRead().

 

It seems like status must be asynSuccess, because otherwise you would have also seen the output from this statement:

 

                if(status != asynSuccess) {

                    asynPrint(pasynUserSelf, ASYN_TRACE_ERROR,

                          "%s:%s: error using readout command status=%d, nRead=%d, eomReason=%d\n",

                          driverName, functionName, status, (int)nread, eomReason);

                }

 

Since you don’t see that it seems like by pasynOctetSyncIO->writeRead() returned asynSuccess, even though it did not read the expected number of characters.  That seems strange.

 

Mark

 

 

From: tech-talk-bounces@aps.anl.gov <tech-talk-bounces@aps.anl.gov> On Behalf Of zhaoying via Tech-talk
Sent: Thursday, November 29, 2018 7:29 PM
To: tech-talk@aps.anl.gov
Subject: ADMythen --acquisition issues

 

Hello, J. Sullivan:

We have a customized DCS6 (Detector control system for up to 6 detector modules ) with 5 Dextris Mythen detector modules. We are using ADMythen module to control those 5 Detectors. The result is as follows.

Figure 1．Read back results

It can be seen the controlling part works well, but the read back data is all 0 which is not reasonable.

We tried to print the debug. The result is like figure 2.

It can be seen “nread” never equals “nread_expected”. So we believe it happens in “acquisition” parts (from line 853 to line 947). But we have not find the actual line.  Any suggestions?

 

Thank you!

---Ying