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TMS320F280025C: Unable to copy variable

Ruud B
Prodigy 230 points
Part Number: TMS320F280025C

Hi,

Using motor controller SDK (universal_motorcontrol_lab_f28002x).

Probably something stupid, but when I try to copy variable motorVars_M1.flagRunIdentAndOnLine (in file communication.c), the copied value always be 0. When I stop the debugger it will show '0x0001' or true, but it will never copy this value. In debugger but the copied value is send via CANbus, and is there also '0'.

(the yellow screen is the variable window when the debugger is halted and you hover over motorVars_M1.flagRunIdentAndOnLine variable)

When running the piece of code in sys_main, value motorVars_M1.flagRunIdentAndOnLine is also '1' and with the next piece of code "test = true;"

}

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bool test = false;
if (motorVars_M1.flagRunIdentAndOnLine == 0x0001)
{
test = true;
}
else
{
test = false;
}
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Any thoughts?

Best Reagrds,

Ruud

  • 0
    TI__Guru** 114280 points

    The "motorVars_M1.flagRunIdentAndOnLine" should be "0" by default of you don't change anything in the example lab, and you can set "motorVars_M1.flagRunIdentAndOnLine" to "1" to start to run the motor.

    You can monitor the variables in CCS debug expressions window, and click the "Continuous Refresh" to see the real time value of the monitoring variables.

    Please have a detailed description about the settings of the project ike what control algorithm and features are selected if you have any further questions.

  • 0 in reply to Yanming Luo
    Prodigy 230 points

    Yes, I understand but what I meant is, that the debugger is showing the correct value (motorVars_M1.flagRunIdentAndOnLine = 0x0001, because I set it to 0x0001 via CANbus), but I cannot copy the value [in file communications.c]. After copying the value is 0. I want to send this value out via CANbus with eg. CANbus faults etc. 

    From sys_main.c I can copy this value correctly.

  • 0 in reply to Ruud B
    TI__Guru** 114280 points

    The issue could be from the compiling and optimization. You may try to use a global variable to copy the value, and try to assign the variable in the same RAM section in .cmd file. Or you can move this code to the other files.