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C2000 coding using simulink

Nitish Agarwal
Intellectual 270 points

I;m working on f28027 micro-controller and trying to code it using simulink.........First I tried to configure an ADC in Simulink  and build it, the code runs fine on c2000 but the changes are not made in the real time in the ADC output, only after stopping the changes are made in the memory blks......aslo I want to compare 2 ADC signals, for that which simulink blk should I use?????.........I want to multiply 2 ADC signals too....I want to multiply ADC with a constant blk to read the measured values, so how I have to configure the constant block to match the data types and multiply........Please help me out in this, Its urgent......Is there anyone I can contact and can help me out in this?

  • 0
    Expert 1020 points

    the changes are not made in the real time in the ADC output, only after stopping the changes are made in the memory blks:

    try graph functionality of CCS to visualize real-time changes.

    I want to compare 2 ADC signals, for that which simulink blk should I use?????:

    compare block of simulink library. give output of channels to its' input port.

    I want to multiply 2 ADC signals too:

    use product block or dedicated TI block for multiplication.

    how I have to configure the constant block to match the data types and multiply:

    there is functionality to set data type of output in ADC block. match it with data type of constant block.

  • 0 in reply to ashish ahir
    Intellectual 270 points

    Thank u sir fro ur reply....Why the changes are not made in the real time in ADC output, as I want continuous changes as I m calculating Power.....In one of the tutorial which done using coding, their changes are made in the real time in the ADC output....where is graph functionality available??....

  • 0 in reply to ashish ahir
    Intellectual 270 points
    Thanks again....just a small question, Whats the use of continuous refresh?
  • 0 in reply to Nitish Agarwal
    Expert 1020 points

    Whats the use of continuous refresh?

    you try that. you will come to know. it is very helpful for what you need.

  • 0 in reply to Nitish Agarwal
    Expert 1020 points
    solved your problem? please update.
  • 0 in reply to ashish ahir
    Intellectual 270 points

    yeah it really solved my problem of real time......Now I want to compare the 2 adc values and based on the condition i.e. if true then GPIO1 blinks otherwise no change in GPIO output....For this I have used a subtractor blk from simulink iibrary , then a mod to remove any negative result, then to comparison blk which compares with a constant, then its output is given to the and gate and this gate is recieving its other input from the different blocks in the same way as discussed...Then the AND gate output is given to data conversion to get int8 output and then this given to GPIO output blk....On running the code I'm not getting the desired results....I m attaching the photo of my simulink model , Pls help me out in this..Thanks

  • 0 in reply to Nitish Agarwal
    Expert 1020 points

    what are inputs to both channels?
    have you checked all logic without ADC channel block in model?

  • 0 in reply to ashish ahir
    Intellectual 270 points
    I have taken the 2 voltage source outputs as the input for the ADC's, considering 2V=2482 which is the constant value...later on I will take this constant value from a other c2000 via zigbee........The logic works fine without the ADC channels
  • 0 in reply to Nitish Agarwal
    Intellectual 270 points

    Thank u so much........The logic with the ADC is working fine just by changing type data type from int8 to single............How to use the RMS block in simulink to get the rms values of voltage and current in order to calculate the power?

  • 0 in reply to Nitish Agarwal
    Expert 1020 points

    Nitish, can you please close this query by clicking "verify answer". ask other question by making separate thread. it will be good for all.