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ID Date Authordown Subject
  473   Thu Jan 14 14:00:26 2016 mony orbachDtap stops toggling after 40msec

surrey i forgot to update..

after carefully examining our VHDL we found out that there are brief times that we put A0-A3 in 1111

after making shore that a0-a3 never get 1111 value thae drs4 woks as expected.

The dtap toggols ok.

We can sample and read all the data channels.

So, putting A0-A3 value of 1111 even for very short period  " confuse " the DRS and then it start to behave in a strange manner.

 

mony

Stefan Ritt wrote:

While I can understand 1., I'm puzzeled by 2.

If you put the chip in standby mode, the internal current sources are switched off, which of course make the domino wave non-functional. This is clearly stated in the data sheet.

Concerning the DMODE bit, we operate all (!) our chips with DMODE=1. Actually this is the default value. After a reset, all register bits are "1", which enables the PLL and causes DTAP to oscillate. If DMODE=1, the DTAP signal should toggle only once (!) since the domino loop is not closed. So the scope traces you showed previously are consistent with the standby mode, but not possible with ANY setting of DMODE.

Stefan

mony orbach wrote:

Hi

We have resolve the problem, the Dtap is now working correctly.

There were two problems:

  1. After configuration we put the all address bits to one (standby mode)

We are now setting the address bits to all zero. Failure

to do so result in Dtap  stop toggling after several hundred milliseconds.

  1. The DMODE bit in contradiction to the data sheet should be set to 0

And not to 1.

 

Is this a known bug in the chip?

Only bay setting DMODE to zero we got the Dtap to work correctly.

The PLL locks after 1 milisec.

If we set it to one we get Dtap that stop toggling after several hundred milliseconds.

We have test it on two boards, they both worked in the same.

Never did we get a One shot  Dtap.

 

Did you published a errata page to the drs4?

 

Thanks, Mony

 

 

  63   Tue Apr 13 10:45:18 2010 lorenzo nerievaluation board used like a counter

Hi all



it is possible to use the evaluation board like a counter?



I'm interested in the arriving time of all self trigger event in to a channel.



the input signal are 2V TTL of 10 ns at 50ohm, and the time acquisition window is 1 second.




can someone help me?



thanks in advance,



Lorenzo

  287   Tue Aug 27 16:14:49 2013 lengchongyang 

  Hello everyone!I'm a new user of DRS4 board,but it seems that some files are missing in my demo project.So I hope someone could help me by sending a correct VHDL hardware project to my Email:lcyiss900@gmail.com.Thanks in advance!

T

 

  288   Wed Aug 28 04:05:48 2013 lengchongyang 

lengchongyang wrote:

  Hello everyone!I'm a new user of DRS4 board,but it seems that some files are missing in my demo project.So I hope someone could help me by sending a correct VHDL hardware project to my Email:lcyiss900@gmail.com.Thanks in advance!

T

 

 I checked my project today and I think I need the file USR_LIB_VEC_IOFD_CPE_NALL.I don't know if is it a VHD files or a IP core.

I'll be extremely grateful.

  315   Tue Dec 10 14:48:42 2013 ismail okan atakisimeasurement range

I m trying to measure lifetime in our lab and I intend to take
measurement with DRS4 at that point I have a little bit confused about
DRS4 time range.In My system I opened 10 us gate but after triggering
DRS4 measure nearly 1.2 us. Because of this I want to extend DRS4 time range that
measurement range from 1.2us to 10 us.  

  186   Thu Nov 1 20:08:33 2012 hongwei yangDRS4 firmware

Hi,

    We are using drs4 board, but oscilloscope app will somehow stop to work if we config trigger into "or and", When I look into the drs4 firmware file drs4_eval3_app.vhd, I couldn't find the trigger_config value assignment which is mentioned at(#7 offset 0x1E from 31 downto 16) in manual_version 4.

could you help me find this trigger_config access point? Or is there any drs4_eval4_app.vhd missing in the source files?

 

thanks

 

Hongwei

  188   Thu Nov 1 20:21:44 2012 hongwei yangDRS4 firmware

Stefan Ritt wrote:

hongwei yang wrote:

Hi,

    We are using drs4 board, but oscilloscope app will somehow stop to work if we config trigger into "or and", When I look into the drs4 firmware file drs4_eval3_app.vhd, I couldn't find the trigger_config value assignment which is mentioned at(#7 offset 0x1E from 31 downto 16) in manual_version 4.

could you help me find this trigger_config access point?

 

thanks

 

Hongwei

The "and" in the trigger section means now "coincidence". So the V4 board can trigger on a coincidence between two or more channels. If there is no pulse at the same time on the coincidence channels, the board will of course not trigger. The according firmware was introduced in V4, so please look at drs4_eval4_app.vhd (not eval3).

I just realized that the V4 firmware might be missing in the distribution, so I have attached it here. Look for drs_ctl_trigger_config.

 

Best regards,

Stefan

 Ah, great, that helps, Thank you!

 

Hongwei

  189   Thu Nov 1 20:25:53 2012 hongwei yangDRS4 firmware

hongwei yang wrote:

Stefan Ritt wrote:

hongwei yang wrote:

Hi,

    We are using drs4 board, but oscilloscope app will somehow stop to work if we config trigger into "or and", When I look into the drs4 firmware file drs4_eval3_app.vhd, I couldn't find the trigger_config value assignment which is mentioned at(#7 offset 0x1E from 31 downto 16) in manual_version 4.

could you help me find this trigger_config access point?

 

thanks

 

Hongwei

The "and" in the trigger section means now "coincidence". So the V4 board can trigger on a coincidence between two or more channels. If there is no pulse at the same time on the coincidence channels, the board will of course not trigger. The according firmware was introduced in V4, so please look at drs4_eval4_app.vhd (not eval3).

I just realized that the V4 firmware might be missing in the distribution, so I have attached it here. Look for drs_ctl_trigger_config.

 

Best regards,

Stefan

 Ah, great, that helps, Thank you!

 

Hongwei

 By the way, will there be a drs4_eval4.vhd as well?

  191   Thu Nov 1 20:46:53 2012 hongwei yangDRS4 firmware

Stefan Ritt wrote:

hongwei yang wrote:

hongwei yang wrote:

Stefan Ritt wrote:

hongwei yang wrote:

Hi,

    We are using drs4 board, but oscilloscope app will somehow stop to work if we config trigger into "or and", When I look into the drs4 firmware file drs4_eval3_app.vhd, I couldn't find the trigger_config value assignment which is mentioned at(#7 offset 0x1E from 31 downto 16) in manual_version 4.

could you help me find this trigger_config access point?

 

thanks

 

Hongwei

The "and" in the trigger section means now "coincidence". So the V4 board can trigger on a coincidence between two or more channels. If there is no pulse at the same time on the coincidence channels, the board will of course not trigger. The according firmware was introduced in V4, so please look at drs4_eval4_app.vhd (not eval3).

I just realized that the V4 firmware might be missing in the distribution, so I have attached it here. Look for drs_ctl_trigger_config.

 

Best regards,

Stefan

 Ah, great, that helps, Thank you!

 

Hongwei

 By the way, will there be a drs4_eval4.vhd as well?

 Here it is.

 Thanks. have a good day

  443   Fri Aug 7 18:41:37 2015 danteDRS4

Hi

I have just installed DRS4, but when I try to view it from the USB it don't work. Why?

 

  [  .../home  $] lsusb -d 04b4:1175 -v

Bus 002 Device 008: ID 04b4:1175 Cypress Semiconductor Corp.
Couldn't open device, some information will be missing
Device Descriptor:

  771   Tue Aug 27 08:33:22 2019 chinmay basuDRS4

Is DRS4 suitable for use with Silicon surface barrier detectors?

  639   Wed Nov 22 08:31:03 2017 chen wenjun using of the DRS Command Line Interface

Hello! I'm using DRS4 evaluation board V5 with the drs command line interface,but the mannal only explained the meaning of the command--"info".And I can't get the hang of the use of other commands through "help",so is there anywhere can I learn more about other commands?Or I can only learn it through the datasheet of DRS4 chip.

Thanks!

 

 

Attachment 1: ΞΆΠΕΝΌΖ¬_20171122153834.png
ΞΆΠΕΝΌΖ¬_20171122153834.png
  641   Wed Nov 22 08:58:33 2017 chen wenjun using of the DRS Command Line Interface

OK!Thank you! One more question,when I use the Oscillocope ,I found that the actual speed is a constant value of 1.007G,how can change this speed.

Stefan Ritt wrote:

The command line interface is more a debugging tool for experts, and you are not supposed to use it except to test the connection to the evaluation board. The programs for the user are the DRS Oscilloscope and the drs_exam.cpp example program to read out the board with your own program.

Stefan

chen wenjun wrote:

Hello! I'm using DRS4 evaluation board V5 with the drs command line interface,but the mannal only explained the meaning of the command--"info".And I can't get the hang of the use of other commands through "help",so is there anywhere can I learn more about other commands?Or I can only learn it through the datasheet of DRS4 chip.

Thanks!

 

 

 

 

Attachment 1: ΞΆΠΕΝΌΖ¬_20171122160245.png
ΞΆΠΕΝΌΖ¬_20171122160245.png
  643   Wed Nov 22 09:19:11 2017 chen wenjun using of the DRS Command Line Interface

Thank you very much !! All my fault for I thought it too comlicated. Thank you sincerely!

Stefan Ritt wrote:

Remove the check mark from the "Lock" box and enter a different value in the sampling speed box and hit return.

chen wenjun wrote:

OK!Thank you! One more question,when I use the Oscillocope ,I found that the actual speed is a constant value of 1.007G,how can change this speed.

Stefan Ritt wrote:

The command line interface is more a debugging tool for experts, and you are not supposed to use it except to test the connection to the evaluation board. The programs for the user are the DRS Oscilloscope and the drs_exam.cpp example program to read out the board with your own program.

Stefan

chen wenjun wrote:

Hello! I'm using DRS4 evaluation board V5 with the drs command line interface,but the mannal only explained the meaning of the command--"info".And I can't get the hang of the use of other commands through "help",so is there anywhere can I learn more about other commands?Or I can only learn it through the datasheet of DRS4 chip.

Thanks!

 

 

 

 

 

 

  653   Thu Jan 25 05:24:05 2018 chen wenjunproblem with the drscl(drs507)

Hi! Stefan:

  when I change a new computer(win7,64bit),I meet a problem that the drscl app cannot found the board! It shows"USB successfully scanned,but no boards found",but the drsosc runs well . when I connect to other win7*64bits computer,only one of them runs property! Is there any driver else I need to install? 

Thank you!

Chen

  654   Thu Jan 25 06:10:52 2018 chen wenjundrscl doesn't find eval board but drsosc does (Windows 7)

Hi! Jim:

  It seems that I meet the same question with you ,and I am confused ,have you find out the reason about this problem?Or can you tell me how you deal with it?

Thank you very much!

chen

Jim Freeman wrote:

I cannot find the EVAL board using drscl version 5.06 while the drsosc works fine. I tried 2 different eval boards and 2 different computers and the same effect. I looked under device manager at the libusb and the drs4 was there, and checked the driver which was found to be up to date.

 

  656   Thu Jan 25 08:07:32 2018 chen wenjunproblem with the drscl(drs507)

I have tried about 4 computers,only one worked fine.I truly want to know how others get this fixed,can you get in touch with them?

Stefan Ritt wrote:

This problem has been reported by several people, like elog:551

So far I could not solve it. On the computers at our lab it works find so I cannot reproduce and fix the problem. One suspicion I have is that the underlying libusb library needs to be updated. You can try to install the newest version from their website at http://libusb.info/, but I haven't tried it myself.

Stefan

 

chen wenjun wrote:

Hi! Stefan:

  when I change a new computer(win7,64bit),I meet a problem that the drscl app cannot found the board! It shows"USB successfully scanned,but no boards found",but the drsosc runs well . when I connect to other win7*64bits computer,only one of them runs property! Is there any driver else I need to install? 

Thank you!

Chen

 

 

  671   Wed Mar 14 09:13:39 2018 chen wenjunconfusion about the description in drs.cpp

Hi,Stefan:

  recently,whtn I study the drs.cpp code ,I found that  the buffer[1] is char but the addr and the base_addr are all unsigned int,isn't there any problem that the addr may be cut off to 8 bits? Also ,I found that the data fpga recieved from the usb is 16 bits,so how can fpga get the true 32bits address from the PC.

Attachment 1: 20180314161201.jpg
20180314161201.jpg
  689   Sun May 6 08:13:37 2018 chen wenjunconfusion about the description in drs.cpp

Hi Stefan:

  I'm still confused that althought the 8 bits buffer is enough,the FPGA receive the command through the uc_data_i register which is 16 bits wides.As we can see in the firmware, the locbus_addr is 32 bits wides. Does it means the locbus_addr[31:8] are always '0' because the address in buffer is only 8 bits. Does it means the usrbus_status_sel and usrbus_ram_sel are also '0' all the time .

thanks!

chen

Stefan Ritt wrote:

The FPGA is very small, so it only has an address space of 256 bytes. Look at the definition in DRS.cpp

#define USB_CTRL_OFFSET                 0x00    /* all registers 32 bit */
#define USB_STATUS_OFFSET               0x40
#define USB_RAM_OFFSET                  0x80

The registers are 32 bits wide, but the addresses only run from 0 to 255, and thus a single byte is enough for addressing them.

chen wenjun wrote:

Hi,Stefan:

  recently,whtn I study the drs.cpp code ,I found that  the buffer[1] is char but the addr and the base_addr are all unsigned int,isn't there any problem that the addr may be cut off to 8 bits? Also ,I found that the data fpga recieved from the usb is 16 bits,so how can fpga get the true 32bits address from the PC.

 

 

  533   Mon Aug 29 09:36:34 2016 benjamin legeytincrement write config register on the fly?

Hello,

I have a question about using the write config register to enable/disable sampling on the fly.  I am looking to instrument an experiment at EPFL where multiple short events need to be captured during a 20us period followed by an 80us quiet period during which we could read out the chip.  Would it be possible to start an acquisition with all channels seeing the same signal and the write config register set to 111111111 and then shift a zero into the write config reg after each event is detected to freeze the channels in time one-by-one?  In this way we could measure up to 8 different events during the active period and then read them all out together during the quiet period.  I have read the posts about the simultaneous read-write mode and the issue with waveforms stopping at cell 767.  not knowing the exact details of what causes this issue I wonder if it would effect this sort of operation?  Also, I would like to know if dwrite must be de-asserted while the write config register is being updated or if it could be done while the sampling is active?  The latter would obviously be preferable as we would not incur any dead-time during the active period.

Thanks in advance for the information,

Benjamin LeGeyt

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