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    • Tom StallardTom Stallard
      Participant
      February 4, 2026 at 9:17 am
      Post count: 7
      #21494

      Hi Audesse Team,

      I have been working on the FCG 1.0 version and am currently testing the LSO and HSO feedbacks. The steps I have followed are outlined below:
      A. HSO Feedbacks
      – Example: HSO-1 is enabled. When measured, I can see the battery supply voltage → HSO feedback is enabled (for outputs 1, 3, …).
      – However, when HSO is shorted to power or ground, the ADC values do not fluctuate.

      B. LSO Feedbacks
      – Example: LSO-1 is enabled. When measured for continuity with ground, it shows continuity.
      – However, when LSO is shorted to power, it stops functioning, and the Digital Input Feedback does not update.
      – After restarting the VCU, the same LSO pin works again.

      I have checked the datasheet and confirmed that all pins are correctly mapped. Could you please advise on this issue?

    • rhyse.maryniukAudesse Team
      Keymaster
      February 4, 2026 at 9:31 am
      Post count: 26
      #21495

      Hi Tom,

      Can you take a look at the DO guide, especially the section on feedback and let me know what you’re seeing with respect to the expected values under certain conditions. It is difficult to tell if/what the issue is based on your current description. The chip may be functioning as designed. I’ve linked it below for your reference.

      Digital IO Guide

      Best,

      Audesse team.

      • Tom StallardTom Stallard
        Participant
        February 4, 2026 at 9:36 am
        Post count: 7
        #21496

        We had a look at the guide. The table mentions reading the voltage on the ADC pin when the HSO pin is shorted to Vcc or GND. The observation here is that the ADC values are not changing. I can confirm that the other ADCs in ADC0 instance works but the HSO FB does not update when the HSO pin is shorted to Vcc or GND.

        Similar is the case with LSO, by default the digital feedbacks assigned for each LSO shows 1 that means it is operating correctly, but when shorted to Vcc, the status does not update.

    • rhyse.maryniukAudesse Team
      Keymaster
      February 4, 2026 at 9:47 am
      Post count: 26
      #21497

      Hi Tom,

      It sounds like it isn’t behaving as expected and is likely a software configuration issue. Can you share your sample code for us to test on our end?

      Audesse team.

    • AmirFAmirF
      Moderator
      February 6, 2026 at 3:34 pm
      Post count: 37
      #21501

      Hi Tom,

      First of all, in FCG1.0.1 and FCG1.0.0, the LSO feedback signals are not functional. This was due to a hardware issue that is fixed in the FCG2.0 version. So, the LSO feedback pins will appear to be stuck high in your hardware, even in case of thermal shutdown.

      Second, there is another known issue on FCG1.0 in which the current measurement pins (ADC pins) on the HSO7,HSO8, HSO9, and HSO10 are not functional. However, the rest of the HSOs are connected correctly and are functional. Please be advised that the current reading pins on HSO channels are just reflecting the amount of current draw and you can’t use them to detect short to GND or short to VBATT.

      Please take a look here for the list of know issues we fixed for FCG2.0. Revisions and Known Issues

      I took a look at your code. Your description is accurate to what I observed. However, I noticed that the data store memory block of “cfg_HSO_FBEnable” was connected to the wrong Dio_Write channel. You can fix that and read the HSO11 current measurement, when cfg_HSO_FBEnable is set to High.

      Cheers,
      Amir

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