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  1. Data Management
  2. DM-33473

Investigate and fix ESS issues reading data from FTDI devices

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    • Story Points:
      3
    • Epic Link:
    • Sprint:
      TSSW Sprint - Jan 31 - Feb 14
    • Team:
      Telescope and Site
    • Urgent?:
      No

      Description

      Reading data from FTDI devices in an asynchronous way results in bogged data while reading from the same device in a synchronous way doesn't. Investigate why and fix.

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          wvreeven Wouter van Reeven added a comment - - edited

          I tried enabling the ESS CSC again on Monday and it went into FAULT state because the temperature sensors didn't output any data. Therefore I took the sensor readout box off the sensors and connected it to my MacBook for debugging purposes. At first I found very weird behavior which I tracked down to me starting a thread, that reads the data from the sensor, twice. Once I realized that, I could make sure in my test code that the thread was only started once and all went back to normal. In the end it turned out that the code was fine but the docker container was lacking privileges to read data from the FTDI device. This has been fixed now, the sensor readout box has been reinstalled, the CSC started and data are entering in the EFD again.

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          wvreeven Wouter van Reeven added a comment - - edited I tried enabling the ESS CSC again on Monday and it went into FAULT state because the temperature sensors didn't output any data. Therefore I took the sensor readout box off the sensors and connected it to my MacBook for debugging purposes. At first I found very weird behavior which I tracked down to me starting a thread, that reads the data from the sensor, twice. Once I realized that, I could make sure in my test code that the thread was only started once and all went back to normal. In the end it turned out that the code was fine but the docker container was lacking privileges to read data from the FTDI device. This has been fixed now, the sensor readout box has been reinstalled, the CSC started and data are entering in the EFD again.
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          aclements Andy Clements added a comment -

          A lot of hardware debugging done by Wouter to get the ESS up and going again.  

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          aclements Andy Clements added a comment - A lot of hardware debugging done by Wouter to get the ESS up and going again.  

            People

            Assignee:
            wvreeven Wouter van Reeven
            Reporter:
            wvreeven Wouter van Reeven
            Reviewers:
            Andy Clements
            Watchers:
            Andy Clements, Wouter van Reeven
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              Dates

              Created:
              Updated:
              Resolved:

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