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Question on NIRscan EVM Reprogramming Procedure

Yaa Hussain
Prodigy 175 points

Dear all,
 
I would like to upgrade DLP NIRscan to version 2. We are referring the procedure from DLPU016A-Appendix C (NIRscan EVM Reprogramming Procedure). We are done until step 4 (refer procedure C.2-reprogramming the DLP NIRscan EVM application software). Unfortunately, no one or both of two blue LEDs flash on off after releasing switch S2. For your information, we are done creating a bootable microSD Card by following the procedures but we are not sure whether the card is ready to reprogram the DLP NIRscan.Any suggestion or guidance regarding this matter?

 Appreciate all kind and quick response.
Thanks;)

  • 0
    Prodigy 175 points

    Dear all,

    The problem faced likely to be successful. We buy two DLP NIRscan, one comes with version 1.0 and the other comes with version 2.0. We are done upgrading DLP NIR Scan from version 1 to version 2. We tried to do measurement to compare the spectra of sample using both DLP NIRscan. DLP 1 refer to the DLP that we upgrade from version 1.0 to 2.0 whereas DLP 2 refer to the DLP that comes with version 2.0 from TI. We used palm oil as the sample and observed that the pattern of spectra is likely to be same but the wavelength is different (as attached). May I know why range of wavelength is not same for both dlp?

  • 0
    TI__Intellectual 1405 points
    Hello,

    If the two blue LEDs do not illuminate and start flashing, then either the system is booting in the standard manner instead of the programming mode, or the card has not been properly prepared.

    We have found that on some boards, the S2 'Boot Mode' switch is difficult to keep fully depressed during the boot cycle, and sometimes requires more pressure than the pad of a finger exerts. If its state fluctuates during boot, it will not enter programming mode to re-flash the stored data in the eMMC on-board storage.

    Can you try depressing the S2 button with a firm tool or fingernail and see if this solves the issue?

    To check whether the SD card is properly prepared, you can mount the SD card on a computer and ensure that the following two partitions are on the card: One named "BEAGLE_BONE" and one named "eMMC-Flasher". But based on our experience, the switch not being firmly depressed is likely the cause of the update not starting.
  • 0 in reply to Yaa Hussain
    TI__Guru 54320 points

    Hello Yaa,

    What you are seeing is the result of factory calibration.  The DMD is mounted in the system and then calibrated through software to account for mechanical variations in the system.  The nearest that it can calibrate is one pixel width.  Notice that all of the differences are less than a nm. 

    The spectral resolution is at least an order of magnitude larger, so that the calibration differences you see will not affect your readings in any significant way.

    One way to handle this is to use a spline interpolation on both sets to map into a common set of wavelength values from each unit.

    I hope this helps.

    Fizix

  • 0 in reply to Fizix
    Prodigy 175 points

    Thank you for your respond. Fr your information I also performed scan of empty cuvette and no cuvette used as reference. By compare using both dlp, I observed that the pattern of spectra is almost the same and peak of spectra fall on same wavelength. But for DLP 1 (DLP that has been upgraded), the range of absorbance is lower than DLP 2 (DLP with version 2.0 from TI) which is 0.05-0.07AU for DLP 1 and 0.06-0.07AU. I wonder this issue will affect the spectral measurement of sample.

            

  • 0 in reply to Fizix
    Prodigy 175 points
    Dear Fizix, I used sequential scan method with spectral range 1350-2450, 275 wavelength point with resolution 4 nm for spectral measurement as mentioned above. Does this setting will effect the calibration difference?