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CCS/TMS320F28379D: EtherCat - Slave Stack Code - Mapping Objects

Willi Konrad
Prodigy 170 points

Part Number: TMS320F28379D
Other Parts Discussed in Thread: CONTROLSUITE

Tool/software: Code Composer Studio

Hi,

i hope you can help me.

I have a question on mapping the in- and outputs in CCS. I have already mapped the objects in SSC, that looks like this:

 

So i have different data types in my objects.

Now if i follow the description, in CCS i have to modify the functions in my generated .c-file:

In this case the pointer pData is a type of UINT16. If the programm does "pData++" the adress of the pointer move to the next 16bit memory but my variable ***_Enable0x7000 is just 8 bit long and the next variable ***_Power0x7001.PWR1 is also in that adress. That does´nt fit to the memory adress in TwinCat.   

For example:

I write in TwinCat:

***_Power0x7001.PWR1 = 1

Now looking in CCS results, that ***_Power0x7001.PWR1 is still 0 but my first variable ***_Enable0x7000 was changed

The 1 was set in next 8 bit of ***_Enable0x7000 --> HEX: 0x0100.

So my question is, how can i handle the mapping with multiple data types if pData can just by one sort of data types. Do i have to change all my varaibles to one data type? If thats true, in next step of the project i need floating points, so pData should be UINT32 and all my variables too.

With best regards

Willi Konrad

  • 0
    TI__Mastermind 19810 points

    Willi,

    We have put an example to help customers with this. If you look at the TMDSECATCNCD379D EtherCAT solution reference guide/example and generate C28 SSC code with example, you will see how this can be handled.

    Please follow SPRUIG9, available in below folder in controlSuite. 

    C:\ti\controlSUITE\development_kits\TMDSECATCND379D_V1.0

    The example application's mapping functions show how to move data from the array to the input/output objects.

    Please let us know if you need any further help with this.

    Best Regards

    Santosh Athuru