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    Hi Mike,<br>
    <br>
    the firmware and the FPGA image are always loaded straight from the
    host computer after a device reset.<br>
    Since you're using the bleeding edge version of UHD on your
    computer, that means that you have the latest (and greatest) version
    of the firmware, too.<br>
    <br>
    This is a bit strange; Balint, any ideas? Might that be calling for
    one of your firmware workarounds?<br>
    <br>
    Best regards,<br>
    <br>
    Marcus<br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 07/01/2015 07:22 PM, Michael
      Kuplicki - US via USRP-users wrote:<br>
    </div>
    <blockquote
      cite="mid:1500bf11afb94fbca03867831630637c@CISEXCASMB03-2a.caci.com"
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        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hello
            Neel,<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
        <p><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">That
            was good advice.  I added  @MYGROUP  - rtprio   99   to 
              /etc/security/limits.conf  and that took care of the
            lockup problem after running tx_samples_from_file.    I
            still have the problem with not always seeing the B200 after
            a power up.  When I run uhd_find_devices I get the loading
            firmware message but sometimes after that a no devices found
            message.  Although I have been using the RPi for my work,
            another coworker that used this B200 before me said he saw
            the same behavior.  He saw this with his  desktop and
            laptop.  In his experience after the device is found
            everything is solid.  This may be a problem particular to
            this board.   Is it possible to update the onboard firmware
            in the B200?<o:p></o:p></span></p>
        <p><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks,<o:p></o:p></span></p>
        <p><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Mike<o:p></o:p></span></p>
        <p><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
        <p><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
            Neel Pandeya [<a class="moz-txt-link-freetext" href="mailto:neel.pandeya@ettus.com">mailto:neel.pandeya@ettus.com</a>]
            <br>
            <b>Sent:</b> Monday, June 29, 2015 7:14 PM<br>
            <b>To:</b> Michael Kuplicki - US<br>
            <b>Cc:</b> usrp-users<br>
            <b>Subject:</b> Re: [USRP-users] Some general help<o:p></o:p></span></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <div>
          <div>
            <p class="MsoNormal" style="margin-bottom:12.0pt"><span
                style="font-family:"Verdana","sans-serif"">Hello
                Michael Kuplicki:<o:p></o:p></span></p>
          </div>
          <div>
            <p class="MsoNormal" style="margin-bottom:12.0pt"><span
                style="font-family:"Verdana","sans-serif"">There's
                some documentation at the link below for how to address
                the UHD warning that you're seeing.<br>
                <br>
                <a moz-do-not-send="true"
href="http://files.ettus.com/manual/page_general.html#general_threading_prio">http://files.ettus.com/manual/page_general.html#general_threading_prio</a><o:p></o:p></span></p>
          </div>
          <div>
            <p class="MsoNormal"><span
                style="font-family:"Verdana","sans-serif"">I
                agree with Marcus Müller, what you are seeing is a bit
                strange. The B200 should still be able to operate over
                USB 2.0 with the RPi. Be careful that you're not
                overwhelming the RPI. Perhaps use a very low rate such
                as ~500 ksps. Could you try running your B200 with an
                laptop, preferably with Ubuntu 14.04, with USB 3.0, to
                verify that the board is working correctly? Also, I
                would recommend that you avoid using the master and
                maint branches of UHD, and that you stick to using
                tagged releases of UHD, such as 3.8.4.<o:p></o:p></span></p>
          </div>
          <div>
            <p class="MsoNormal"><span
                style="font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
          </div>
          <div>
            <p class="MsoNormal" style="margin-bottom:12.0pt"><span
                style="font-family:"Verdana","sans-serif"">--Neel<br>
                <br>
                <o:p></o:p></span></p>
          </div>
          <div>
            <p class="MsoNormal"><o:p> </o:p></p>
            <div>
              <p class="MsoNormal">On 29 June 2015 at 14:54, Marcus <o:p></o:p></p>
              <div>
                <p class="MsoNormal"><span
                    style="font-family:"Arial","sans-serif"">​
                    ​</span><span
                    style="font-family:"Verdana","sans-serif""><o:p></o:p></span></p>
              </div>
              <p class="MsoNormal">Müller <<a moz-do-not-send="true"
                  href="mailto:usrp-users@lists.ettus.com"
                  target="_blank">usrp-users@lists.ettus.com</a>>
                wrote:<o:p></o:p></p>
              <div>
                <p class="MsoNormal" style="margin-bottom:12.0pt">Hi
                  Mike,<br>
                  <br>
                  that's all a bit strange; especially the part where
                  you have to reset the device a couple of times --
                  after a loss of power, the device is pretty much in a
                  clean slate status.<br>
                  So, as a first test, I'd just ask you to try your USRP
                  with your "proper" PC, and see if it works normally.
                  The rates you can push through USB2 might still be a
                  bit hard on the poor raspbi.<br>
                  <br>
                  Best regards,<br>
                  Marcus<o:p></o:p></p>
                <div>
                  <p class="MsoNormal">On 06/29/2015 11:19 PM, Michael
                    Kuplicki - US via USRP-users wrote:<o:p></o:p></p>
                </div>
                <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
                  <div>
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I
                      am running Ubuntu Mate 15.04 on a Raspberry Pi 2. 
                      I am trying to run a B200 USRP with this setup,
                      mostly interested in transmitting with the B200. 
                      I have been successful in building the uhds and
                      have been able to transmit a FM signal I created
                      the IQ data with in Matlab.  My problem is that
                      after running  tx_samples_from _file to transmit
                      my data it may not work again<i>. 
                      </i>tx_samples_from_file seems to run the second
                      time on the terminal  but the transmit LED does
                      not come on and no RF signal is generated.  I also
                      find that connecting to the device is
                      problematic.  uhd_find_devices does not always
                      work after a power up reset.  I have to reset the
                      hardware with a power cycle a few times before it
                      will take.  The Raspberry Pi does not have a USB
                      3.0 port.  I have tried using external power to
                      the B200 but the behavior does not seem to
                      change.  And when running tx_samples_from _file  I
                      get two startup messages:<o:p></o:p></p>
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">linux;
                      GNU C++ version 4.9.2; Boost_105500;
                      UHD_003.009.git-171-g51bc00ee<o:p></o:p></p>
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">UHD
                      Warning:<o:p></o:p></p>
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">   
                      Unable to set the thread priority. Performance may
                      be negatively affected.<o:p></o:p></p>
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">   
                      Please see the general application notes in the
                      manual for instructions.<o:p></o:p></p>
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">   
                      EnvironmentError: OSError: error in
                      pthread_setschedparam<o:p></o:p></p>
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Any
                      suggestions?<o:p></o:p></p>
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Thanks,<o:p></o:p></p>
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Mike<o:p></o:p></p>
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                  </div>
                  <p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></p>
                  <pre>_______________________________________________<o:p></o:p></pre>
                  <pre>USRP-users mailing list<o:p></o:p></pre>
                  <pre><a moz-do-not-send="true" href="mailto:USRP-users@lists.ettus.com" target="_blank">USRP-users@lists.ettus.com</a><o:p></o:p></pre>
                  <pre><a moz-do-not-send="true" href="http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com" target="_blank">http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com</a><o:p></o:p></pre>
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                <p class="MsoNormal"><o:p> </o:p></p>
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              <p class="MsoNormal" style="margin-bottom:12.0pt"><br>
                _______________________________________________<br>
                USRP-users mailing list<br>
                <a moz-do-not-send="true"
                  href="mailto:USRP-users@lists.ettus.com">USRP-users@lists.ettus.com</a><br>
                <a moz-do-not-send="true"
href="http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com"
                  target="_blank">http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com</a><o:p></o:p></p>
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            <p class="MsoNormal"><o:p> </o:p></p>
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      <pre wrap="">_______________________________________________
USRP-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:USRP-users@lists.ettus.com">USRP-users@lists.ettus.com</a>
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</pre>
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