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DSP TMSDOCK28335 Experimenter Kit ADC calibration

Dear all

Have had a lot of issues regarding the 2nd 28335 Delfino control card that I had purchased in compensation to the first one that got 'burnt' mysteriously as a part of a 1-phase grid-connected inverter project. Yes I admit it may have been a spike while connecting 5 of the analog inuts in a closed loop configuration although we had used op-amp 741 scaling circuits to ensure 3 V range but the error seemed to be something different. Now the new one worked well for 2 weeks and we managed to complete our grid-connected inverter but when we ran it after 2 days of inactivity, it failed to load the Simulink compiled programs. The next day it failed to connect--Emulator XDS100 USB error---as before. A week later, it gets connected but now says "ADC Calibration error, check if evice is unlocked and re-calibrate". The program also gets loaded but while running it says "Data verification failed at address 0 8000. Please verify target memory and memory map". To be clear, I am just using Simulink blocks to compile the controller block models and loading it to target via CCS V3.3 I have had no exposure to CCS coding.

Regards

  • Hi Ganjendra,

    To me, this sounds like something hardware related (at least partially).

    I might recommend taking a look at the Absolute Maximum Ratings for all pins which is specified in the F28335 datasheet.  Note that the voltage on any pin must be within a voltage range and current limit at all times. 

    It sounds like you may not be fully following the spec on some ADC pins - and I suspect that some of these inputs are being given some voltage prior to the C2000 chip being powered.  This could be what is reducing the life of the C2000 device.


    Thank you,
    Brett