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ID Date Authordown Subject
  604   Thu Apr 13 17:10:58 2017 Christian FarinaStand-alone Time Calibration for PSI Board

Thank you for your help Stefan. I will try to get the TC part isolated.

Stefan Ritt wrote:

Than you can try to isolate the code. Note that different SCAs might work differently. Like the DRS4 has a channel-to-channel jitter which others might not. But you will see.

Stefan

Christian Farina wrote:

Hi Stefan,

Thank you for your reply. I have read the paper already. I looked through the code and I understand that the LTC and GTC are performed by the AnalyzeSlope and AnalyzePeriod functions, respectively, correct? It seems to me to be a complicated business to re-write that part from scratch, at least for an inexperienced programmer like me. It made more sense to try to isolate that part from the original DRS.cpp. Ideally, I would like to have a stand-alone program that would work on any SCA without references to the drs hardware specifics.

Stefan Ritt wrote:

Hard to say. Timing calibration is quite delicate. If you start from scratch, better read this paper: https://arxiv.org/abs/1405.4975

If you try to extract the code from DRS.cpp, better read the paper, too. Probably it will not be possible to develop or extract the code without knowing how it works. 

Best,
Stefan

Christian Farina wrote:

Hello everybody,

I was trying to create a stand-alone program that would perform a time calibration on the board. My goal would be the following.

- acquire  about 10k sinus waveforms

- write them to disk (also for later reanalysis)

- run the time calibration on the recorded data

- store the clibration results in a file / database

Being not an expert, my question here is the following. Would it be easier to try to isolate the time calibration part from the DRS.cpp source code or re-write entirely the code from scratch?

Thanks.

 

 

 

 

  483   Wed Mar 9 09:57:20 2016 Christian DLabView

Hi,

I would like to use the DRS4 board with LabView for fast readout.
Do you know anyone who has written a VI for that?

Thanks,
Christian

  392   Sun Oct 19 14:36:54 2014 Chris Tullycoverting the xml file format into binary

 Hi,

    Is there a straightforward way to convert the xml file format into the binary format?  I have some runs taken mistakenly with xml.

Best,

Chris

 

  451   Wed Nov 25 02:52:35 2015 Chris ThompsonPC software beyond Windows 7

I am new to this forum. I have ordered a DRS4 evaluation board for doing experiments with very fast PET detectors. It has not arrived yet. The version of the manual I downloaded today shows software  installation instructions for Windows 7 and earlier versions. I intend to use it on a 64bit PC running Windows 8.1. Will the Windows 7 driver work, or is there an updated version for Windows 8 or 10?

  453   Wed Nov 25 17:36:25 2015 Chris ThompsonPC software beyond Windows 7

I tried this suggestion of changing the startup settings to ingore driver license signing (as suggested in the post # 434), but when I tried to install the software I got a error message which I captured from the screen and I have attached. Perhaps I have the wrong version, or, as suggested, the file I downloaded from your site is incomplete?

Stefan Ritt wrote:

Have a look here elog:434

Chris Thompson wrote:

I am new to this forum. I have ordered a DRS4 evaluation board for doing experiments with very fast PET detectors. It has not arrived yet. The version of the manual I downloaded today shows software  installation instructions for Windows 7 and earlier versions. I intend to use it on a 64bit PC running Windows 8.1. Will the Windows 7 driver work, or is there an updated version for Windows 8 or 10?

 

 

  455   Sat Dec 5 02:39:20 2015 Chris ThompsonPC software beyond Windows 7

I tried restarting Windows 10 in a way the allowed me to use "advanced startup options" Option 7 suggested it was to restart without mandatory driver signing. However, the error persists. Has anyone tested this latest version 5.0.4 on Windows 10? My hardware arrived today, and I am anxious to test it.!!!!

Chris Thompson wrote:

I tried this suggestion of changing the startup settings to ingore driver license signing (as suggested in the post # 434), but when I tried to install the software I got a error message which I captured from the screen and I have attached. Perhaps I have the wrong version, or, as suggested, the file I downloaded from your site is incomplete?

Stefan Ritt wrote:

Have a look here elog:434

Chris Thompson wrote:

I am new to this forum. I have ordered a DRS4 evaluation board for doing experiments with very fast PET detectors. It has not arrived yet. The version of the manual I downloaded today shows software  installation instructions for Windows 7 and earlier versions. I intend to use it on a 64bit PC running Windows 8.1. Will the Windows 7 driver work, or is there an updated version for Windows 8 or 10?

 

 

 

  456   Sat Dec 5 03:21:21 2015 Chris ThompsonPC software beyond Windows 7

On a hunch, I tried downloading V 5.0.3 instead. This works, and I now have the oscilloscope mode displaying signals! (just to make sure, I re-tire version 5.0.4 and still get the same error. So, in summary V 5.0.3 seems to install successfully and work with Windows 10, but the newer V5.0.4 does not install... I assmume that I am missing something though, as the newer version is 10 Mbytes bigger!

Chris Thompson wrote:

I tried restarting Windows 10 in a way the allowed me to use "advanced startup options" Option 7 suggested it was to restart without mandatory driver signing. However, the error persists. Has anyone tested this latest version 5.0.4 on Windows 10? My hardware arrived today, and I am anxious to test it.!!!!

Chris Thompson wrote:

I tried this suggestion of changing the startup settings to ingore driver license signing (as suggested in the post # 434), but when I tried to install the software I got a error message which I captured from the screen and I have attached. Perhaps I have the wrong version, or, as suggested, the file I downloaded from your site is incomplete?

Stefan Ritt wrote:

Have a look here elog:434

Chris Thompson wrote:

I am new to this forum. I have ordered a DRS4 evaluation board for doing experiments with very fast PET detectors. It has not arrived yet. The version of the manual I downloaded today shows software  installation instructions for Windows 7 and earlier versions. I intend to use it on a 64bit PC running Windows 8.1. Will the Windows 7 driver work, or is there an updated version for Windows 8 or 10?

 

 

 

 

  475   Thu Jan 14 21:49:37 2016 Chris ThompsonTriggering of DRS4 in the fastest sampling mode

I am attempting to use the DRS4 to measure the timing resolution of a pair of SensL silicon photomultipliers (SiPM). In order to do this I need to trigger the DRS4 only when there is a coincidence between the two input signals, and hopefully make histograms of the relative detection times of each detector.

There are two completely separate issues. (1) I think this may just be a labelling error. In the first image (OR_mode_selected) one can clearly see two pulses which are very similar. In this mode, both signals are present, and are always present. I think this should be the "AND", not "OR" of the two signals. Contrast this with the second image where I have selected "AND_mode". Clearly only one signal is present, and either signal trigges an event, so this should be "OR", not "AND"

The second issue is, for me, much more serious. I want to sample the leading edge of this event in order to determine its "time". The little "T" at the top of each image is, I believe the "trigger point" in the first two images. However, this is well after the part of the signal I am interested in. The first two images were at 2 GigaSamples/sec. The third is at 5 GigaSamples/sec. Clearly the event I am interested in processing is over by then. At the lower sampling rate, I can see well before the "T", but at the higher one I can only see after the "T". I had built an external "coincidence circuit" and the "external trigger mode" hoping to to circumvent this issue by using very long cables to delay the signals inut to the DRS4, But even then I have not been successful in getting the to work.

I am using version 5.0.3 on a PC as the version released after that did not work.

I hope some can help!

Chris Thompson

  492   Thu Mar 31 20:48:00 2016 Chris ThompsonTrigger on the And of a positive and negative signal

I needed a fast pulse inverter in order to feed signals from the recent SensL SiPMs into a conventional CFD which only accepted negative signals. I got a very small ferite torridal transformer from Coilcraft and wired up to invert signals then inserted into in 50 ohm coax cable and it works fine. These things cost only a few cents each!

Abaz Kryemadhi wrote:

Thanks, that looks just fine.

Stefan Ritt wrote:

Here is one (SI 100): https://www.picoquant.com/products/category/accessories/adapters-splitters-cables-various-accessories-for-photon-counting-setups

Abaz Kryemadhi wrote:

Ok, thanks!  do you know an easy in-line inverter like mini-circuit or digikey?    Can also redesign the detector I gues to produce positive signals, just it might be easier if there was a simple inverter if you are aware of? thanks Abaz

Stefan Ritt wrote:

No. You have to use an inverter for one of your signals.

Stefan

Abaz Kryemadhi wrote:

I would like to be able to trigger in this fashon:  channel 0 > 0.1 and. channel 1< -0.1,  because I have a positive and a negative signal.  Can DRS4 (5) Eval board do this kind of trigger?

Thanks!

Abaz

 

 

 

 

 

  494   Fri Apr 1 22:09:07 2016 Chris ThompsonTrigger on the And of a positive and negative signal

The coilcraft part number is: JA4220-ALB. Iordered two of them and they were sent as free samples. You might want to buy some slightly bigger ones. I found them so small it was very hard to solder the coax cable to the connectors. Since I got them, I managed to damage one as they are quite fragile! In the confirmation email I got there was some contact info which may be useful for you: "For help, contact Victoria Berner at 847-516-5551  vberner@coilcraft.com "  BTW every time I use this forum I'm told that my password is not valid. Each time I reset it according to the "Lost pasword preceedure. Then I can log on again. Its quite annoying.

Abaz Kryemadhi wrote:

Hi Chris,

 I am looking at Sensl SiPMs as well,  can you send the part number from Coilcraft?

Thanks!

Abaz

Chris Thompson wrote:

I needed a fast pulse inverter in order to feed signals from the recent SensL SiPMs into a conventional CFD which only accepted negative signals. I got a very small ferite torridal transformer from Coilcraft and wired up to invert signals then inserted into in 50 ohm coax cable and it works fine. These things cost only a few cents each!

Abaz Kryemadhi wrote:

Thanks, that looks just fine.

Stefan Ritt wrote:

Here is one (SI 100): https://www.picoquant.com/products/category/accessories/adapters-splitters-cables-various-accessories-for-photon-counting-setups

Abaz Kryemadhi wrote:

Ok, thanks!  do you know an easy in-line inverter like mini-circuit or digikey?    Can also redesign the detector I gues to produce positive signals, just it might be easier if there was a simple inverter if you are aware of? thanks Abaz

Stefan Ritt wrote:

No. You have to use an inverter for one of your signals.

Stefan

Abaz Kryemadhi wrote:

I would like to be able to trigger in this fashon:  channel 0 > 0.1 and. channel 1< -0.1,  because I have a positive and a negative signal.  Can DRS4 (5) Eval board do this kind of trigger?

Thanks!

Abaz

 

 

 

 

 

 

 

  498   Sun Apr 3 22:10:19 2016 Chris ThompsonTrigger on the And of a positive and negative signal

No there are no other components. I put a photo of the inverter with its cables SMA and one end, BNC at the other. You can see it is very small. I glued the inverter to a piece of thin plywood, and fixed the cables to it before attempting to solder them to the pads on the ferite bead support

Abaz Kryemadhi wrote:

Thanks again,   this is very useful,  just another question did you put any other passive elements in the circuit for inverting the signal or just simply swaped the transformer connections? 

Chris Thompson wrote:

The coilcraft part number is: JA4220-ALB. Iordered two of them and they were sent as free samples. You might want to buy some slightly bigger ones. I found them so small it was very hard to solder the coax cable to the connectors. Since I got them, I managed to damage one as they are quite fragile! In the confirmation email I got there was some contact info which may be useful for you: "For help, contact Victoria Berner at 847-516-5551  vberner@coilcraft.com "  BTW every time I use this forum I'm told that my password is not valid. Each time I reset it according to the "Lost pasword preceedure. Then I can log on again. Its quite annoying.

Abaz Kryemadhi wrote:

Hi Chris,

 I am looking at Sensl SiPMs as well,  can you send the part number from Coilcraft?

Thanks!

Abaz

Chris Thompson wrote:

I needed a fast pulse inverter in order to feed signals from the recent SensL SiPMs into a conventional CFD which only accepted negative signals. I got a very small ferite torridal transformer from Coilcraft and wired up to invert signals then inserted into in 50 ohm coax cable and it works fine. These things cost only a few cents each!

Abaz Kryemadhi wrote:

Thanks, that looks just fine.

Stefan Ritt wrote:

Here is one (SI 100): https://www.picoquant.com/products/category/accessories/adapters-splitters-cables-various-accessories-for-photon-counting-setups

Abaz Kryemadhi wrote:

Ok, thanks!  do you know an easy in-line inverter like mini-circuit or digikey?    Can also redesign the detector I gues to produce positive signals, just it might be easier if there was a simple inverter if you are aware of? thanks Abaz

Stefan Ritt wrote:

No. You have to use an inverter for one of your signals.

Stefan

Abaz Kryemadhi wrote:

I would like to be able to trigger in this fashon:  channel 0 > 0.1 and. channel 1< -0.1,  because I have a positive and a negative signal.  Can DRS4 (5) Eval board do this kind of trigger?

Thanks!

Abaz

 

 

 

 

 

 

 

 

 

  357   Fri Jun 27 11:23:19 2014 ChengMing Dudrsosc binary to cern ROOT file conversion

Stefan Ritt wrote:

Luka Pavelic wrote:

Thank you for your fast and very helpful replay.

I made it work with drsosc version 4 but with version 5 i am getting weird results. Is it possible that they changed binary formatting?

 

Yes, but this is documented in the evaluation board manual. You have to modify the script slightly. I will update it myself in about 2-3 weeks.

Cheers,

Stefan

 hi Stefan,can you update the code to convert binary to root for newest drsosc?Thanks.

  412   Wed May 13 09:31:18 2015 Chenfei Yangtransparent-mode voltage

Hello Mr. Stefan Ritt

  For DRS4 differential inputs ranges form 500mV to 1100mV, with ROFS set to 1.55V, O_OFS set to 1.3V, the outputs of DRS4 is shown in the attachment.

  The left part of the waveform,DRS4 works in transparent mode, and then the readout take place. The DMV of transparent mode is bigger then the readout mode, and that makes ADC sampling harder.How may I solve this problem?

  Best wishes!

                                 Chenfei Yang

  414   Wed May 13 09:55:09 2015 Chenfei Yangtransparent-mode voltage

Here's the problem. My external ADC has 2Vpp differtial input voltage range. And the common-mode voltage of the inputs need to be 1.3V. I cannot make both the transparent-output and the readout-output meet the ADC input requirement.

Stefan Ritt wrote:

The ROFS signal has no effect in the transparent mode, so you have to adjust O_OFS between sampling and transparent mode accordingly. Either use a DAC or two voltages with an analog switch.

Chenfei Yang wrote:

Hello Mr. Stefan Ritt

  For DRS4 differential inputs ranges form 500mV to 1100mV, with ROFS set to 1.55V, O_OFS set to 1.3V, the outputs of DRS4 is shown in the attachment.

  The left part of the waveform,DRS4 works in transparent mode, and then the readout take place. The DMV of transparent mode is bigger then the readout mode, and that makes ADC sampling harder.How may I solve this problem?

  Best wishes!

                                 Chenfei Yang

 

 

  416   Wed May 13 10:27:43 2015 Chenfei Yangtransparent-mode voltage

I'm using an AD9252, 0.9V common mode voltage is suggested and I already use 8 un-switchable level shifters. Just as you said, this common mode range is recommended for optimum performance and the device can function over a wider range with reasonable performance. So I think I could adjust O_OFS to a minor level during transparent output.

Stefan Ritt wrote:

I see your point. Actually I will soon have the same issue since we design right now a board with an AD9637 using the transparent mode. Which one are you using? The common mode range given in the datasheet is limited to guarantee optimal performance. But some ADCs allow a slightly bigger common mode range with reduced performance, but which might still be ok for some application. A "real" solution would be to put switchable level shifters between the DRS and the ADC, but that requires 8 additional chips which is bad. Alternative the ADC could pick up the signal not at the DRS output but at the DRS input, but that would aslo require additional chips for multiplexing. So unfortunately no perfect solution for that...

Chenfei Yang wrote:

Here's the problem. My external ADC has 2Vpp differtial input voltage range. And the common-mode voltage of the inputs need to be 1.3V. I cannot make both the transparent-output and the readout-output meet the ADC input requirement.

Stefan Ritt wrote:

The ROFS signal has no effect in the transparent mode, so you have to adjust O_OFS between sampling and transparent mode accordingly. Either use a DAC or two voltages with an analog switch.

Chenfei Yang wrote:

Hello Mr. Stefan Ritt

  For DRS4 differential inputs ranges form 500mV to 1100mV, with ROFS set to 1.55V, O_OFS set to 1.3V, the outputs of DRS4 is shown in the attachment.

  The left part of the waveform,DRS4 works in transparent mode, and then the readout take place. The DMV of transparent mode is bigger then the readout mode, and that makes ADC sampling harder.How may I solve this problem?

  Best wishes!

                                 Chenfei Yang

 

 

 

 

  418   Wed May 13 12:52:22 2015 Chenfei Yangtransparent-mode voltage

Yes. I use exactly the same scheme as you mentioned. I'll try your solution.

Stefan Ritt wrote:

There might be a solution. How do you bias th input of the DRS4 chip? If you use a scheme as described in elog:84, you can bias DRS_IN+ and DRS_IN- as desired. Take for example a board input range of 0-1V. For a 0V input, you bias DRS_IN+ and DRS_IN- both with 0.9V. A 1V input signal then puts DRS_IN+ to 1.4V and DRS_IN-to 0.4 V. In the transparent mode, DRS_OUT+ = DRS_IN+ and DRS_OUT- = O-OFS - DRS_OUT+. So if you put O-OFS to 0.9V, you get for a 0V board input signal DRS_OUT- = 2*0.9V - DRS_OUT+ = 0.9V. So DRS_OUT+   = DRS_OUT- = 0.9 V which is in the middle of your ADC range. 

If you do now a DRS readout, you need a ROFS of roughly 0.9V. For a 0V input, the storage capacitors have a zero differential voltage (DRS_IN+ = DRS_IN- = 0.8V), so DRS_OUT+ = (0.8V - 0.8V) + ROFS  = 0.9V, and since you have O-OFS=0.9V, you will also get DRS_OUT- = 2*0.9V - DRS_OUT+ = 0.9V. So you ranges for transparent mode nad DRS readout mode will be roughly the same.

 

  419   Wed May 13 16:13:07 2015 Chenfei Yangtransparent-mode voltage

If using a ROFS of 0.9V, the input would not between 1.05V~2.05V better non-linearity area. Is that appropriate?

Stefan Ritt wrote:

There might be a solution. How do you bias th input of the DRS4 chip? If you use a scheme as described in elog:84, you can bias DRS_IN+ and DRS_IN- as desired. Take for example a board input range of 0-1V. For a 0V input, you bias DRS_IN+ and DRS_IN- both with 0.9V. A 1V input signal then puts DRS_IN+ to 1.4V and DRS_IN-to 0.4 V. In the transparent mode, DRS_OUT+ = DRS_IN+ and DRS_OUT- = O-OFS - DRS_OUT+. So if you put O-OFS to 0.9V, you get for a 0V board input signal DRS_OUT- = 2*0.9V - DRS_OUT+ = 0.9V. So DRS_OUT+   = DRS_OUT- = 0.9 V which is in the middle of your ADC range. 

If you do now a DRS readout, you need a ROFS of roughly 0.9V. For a 0V input, the storage capacitors have a zero differential voltage (DRS_IN+ = DRS_IN- = 0.8V), so DRS_OUT+ = (0.8V - 0.8V) + ROFS  = 0.9V, and since you have O-OFS=0.9V, you will also get DRS_OUT- = 2*0.9V - DRS_OUT+ = 0.9V. So you ranges for transparent mode nad DRS readout mode will be roughly the same.

 

  441   Mon Jul 20 09:25:38 2015 Chenfei YangMeasure the time between different samples
Hi,
  I have a question using a data acquisition card base on DRS4 chip. How can I measure the time between several samples of one channel&#65292;with the accuracy of like nanoseconds , for I am using the internal trigger. Is there any complete work about this problem&#65311;
  One conceivable way is using an global counter in FPGA, but I'm wondering how to synch the counter with the DRS4 sampling.
  Thanks.
Chenfei Yang
  335   Tue Apr 15 18:35:41 2014 Carlo Stelladrs_exam project fail to compile

Hi,

when I try to compile drs_exam project my computer give me this output:

 

1>------ Rebuild All started: Project: drs_exam, Configuration: Debug Win32 ------
1>  averager.cpp
1>c:\users\daq\desktop\

original drs\drs5\src\averager.cpp(165): warning C4996: 'fopen': This function or variable may be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
1>          c:\program files (x86)\microsoft visual studio 10.0\vc\include\stdio.h(234) : see declaration of 'fopen'
1>  DRS.cpp
1>c:\users\daq\desktop\original drs\drs5\src\drs.cpp(4597): warning C4244: '=' : conversion from 'double' to 'float', possible loss of data
1>  drs_exam.cpp
1>  Generating Code...
1>  musbstd.c
1>  mxml.c
1>  strlcpy.c
1>  Generating Code...
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_claim_interface referenced in function _musb_open
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_set_configuration referenced in function _musb_open
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_open referenced in function _musb_open
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_get_busses referenced in function _musb_open
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_set_debug referenced in function _musb_open
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_find_devices referenced in function _musb_open
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_find_busses referenced in function _musb_open
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_init referenced in function _musb_open
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_set_altinterface referenced in function _musb_set_altinterface
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_close referenced in function _musb_close
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_release_interface referenced in function _musb_close
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_bulk_write referenced in function _musb_write
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_bulk_read referenced in function _musb_read
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_reset referenced in function _musb_reset
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_get_descriptor referenced in function _musb_get_device
1>.\Debug/drs_exam.exe : fatal error LNK1120: 15 unresolved externals
========== Rebuild All: 0 succeeded, 1 failed, 0 skipped ==========
 
Can anyone help me to solve the problem?
  341   Thu Apr 24 23:03:25 2014 Carlo Stelladrs_exam project fail to compile

Stefan Ritt wrote:

Carlo Stella wrote:

Hi,

when I try to compile drs_exam project my computer give me this output:

 

1>------ Rebuild All started: Project: drs_exam, Configuration: Debug Win32 ------
1>  averager.cpp
1>c:\users\daq\desktop\

original drs\drs5\src\averager.cpp(165): warning C4996: 'fopen': This function or variable may be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
1>          c:\program files (x86)\microsoft visual studio 10.0\vc\include\stdio.h(234) : see declaration of 'fopen'
1>  DRS.cpp
1>c:\users\daq\desktop\original drs\drs5\src\drs.cpp(4597): warning C4244: '=' : conversion from 'double' to 'float', possible loss of data
1>  drs_exam.cpp
1>  Generating Code...
1>  musbstd.c
1>  mxml.c
1>  strlcpy.c
1>  Generating Code...
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_claim_interface referenced in function _musb_open
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_set_configuration referenced in function _musb_open
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_open referenced in function _musb_open
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_get_busses referenced in function _musb_open
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_set_debug referenced in function _musb_open
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_find_devices referenced in function _musb_open
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_find_busses referenced in function _musb_open
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_init referenced in function _musb_open
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_set_altinterface referenced in function _musb_set_altinterface
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_close referenced in function _musb_close
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_release_interface referenced in function _musb_close
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_bulk_write referenced in function _musb_write
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_bulk_read referenced in function _musb_read
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_reset referenced in function _musb_reset
1>musbstd.obj : error LNK2019: unresolved external symbol _usb_get_descriptor referenced in function _musb_get_device
1>.\Debug/drs_exam.exe : fatal error LNK1120: 15 unresolved externals
========== Rebuild All: 0 succeeded, 1 failed, 0 skipped ==========
 
Can anyone help me to solve the problem?

Have a look at the web site http://www.psi.ch/drs/software-download . Under the MS Windows section it says that you have to install the libusb-1.0 package first before you can compile the example program. This is also obvious from the missing _usb_* functions in the error listing above.

/Stefan

 Hi Stefan,

you were right, I forgot to install the libusb driver.

Thanks for your support

ELOG V3.1.4-80633ba