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LAUNCHXL-F28P55X: PWM MACRO and PWM HV modules

luca debs
Prodigy 220 points
Part Number: LAUNCHXL-F28P55X
Other Parts Discussed in Thread: C2000WARE

Tool/software:

Hi

Where can I find the explanation and implementation of these two modules in the documents or in the dual_axis_servo_drive code?

Thanks

  • 0
    TI__Expert 4180 points

    Luca, 

    I have assign this to our motor code expert. He will reply soon on your question. We appreciate your patience.

    Regards,

    Sumit

  • +1 in reply to Sumit Patil1
    TI__Mastermind 45606 points

    Hi,

    I don't see documentation that explains it further, only other thing is https://www.ti.com/lit/ug/spruip4/spruip4.pdf?ts=1756308970299 

    Here is the related code for SVGEN and PWM comparator value setting. Hope it clarifies it.

    //
//  MACRO to :-
//      1. do SVGEN
//      2. do PWMupdates
//
FCL_SVGEN_PWM_PDATE_MACRO();
    
// FCL MACRO implementing SVGEN and PWM updates
// used in both PI CONTROL and COMPLEX CONTROL
//
#define FCL_SVGEN_PWM_PDATE_MACRO()                                            \
/*                                                                             \
 * ----------------------------------------------------------------------------\
 * Call the space vector gen. macro                                            \
 * ----------------------------------------------------------------------------\
 */                                                                            \
    svgen2.Tb = (svgen2.Ubeta - svgen2.Ualpha) / 2;                            \
    svgen2.Tc = svgen2.Tb - svgen2.Ubeta;                                      \
                                                                               \
    svgen2.tmp2 = __fmax(__fmax(svgen2.Ualpha,                                 \
                                       svgen2.Tc), svgen2.Tb);                 \
    svgen2.tmp2 += __fmin(__fmin(svgen2.Ualpha,                                \
                                        svgen2.Tc), svgen2.Tb);                \
                                                                               \
    svgen2.tmp1  =  ((-svgen2.tmp2) / 2) +                                     \
                             pMotor->FCL_params.carrierMid;                    \
                                                                               \
/*                                                                             \
* -----------------------------------------------------------------------------\
* Computed Duty and Write to CMPA register                                     \
* -----------------------------------------------------------------------------\
*/                                                                             \
     FCL_PWM_UPDATE_STYLE_3();
     
#define FCL_PWM_UPDATE_STYLE_3()                                               \
    *(pMotor->pwmCompA) = (uint32_t)(svgen2.Tc + svgen2.tmp1);                 \
    *(pMotor->pwmCompB) = (uint32_t)(svgen2.Ualpha + svgen2.tmp1);             \
    *(pMotor->pwmCompC) = (uint32_t)(svgen2.Tb + svgen2.tmp1);

    Best,

    Kevin

  • 0 in reply to Kevin Allen18
    Prodigy 220 points

    Thank you.

    But is the code you sent me that of SVGEN or that of PWM MACRO/PWM HV ?

  • 0 in reply to luca debs
    TI__Mastermind 45606 points

    Hi,

    It is both. For PWM Macro see FCL_PWM_UPDATE_STYLE_3() function which calculates and sets the PWM compare values based on the SVGEN inputs. And pwmCompA/B/C pointer was already defined in FCL_initPWM() function earlier, so it writes directly to the EPWM CMPA register.

        ptrMotor->pwmCompA = (uint32_t *)(basePhaseU + EPWM_O_CMPA);
    ptrMotor->pwmCompB = (uint32_t *)(basePhaseV + EPWM_O_CMPA);
    ptrMotor->pwmCompC = (uint32_t *)(basePhaseW + EPWM_O_CMPA);

    Best,

    Kevin

  • 0 in reply to Kevin Allen18
    Prodigy 220 points

    I ask one more thing.

    The explanation of all modules used in dual_axis_servo_drive can be found by downloading designdrive?

    Because I currently do not have it installed, although the code works since CCS is sufficient 

  • 0 in reply to luca debs
    TI__Mastermind 45606 points

    Hi,

    You can import into CCS and reference the below project directory that's in the https://www.ti.com/tool/C2000WARE-MOTORCONTROL-SDK installation.

    C:\ti\c2000\C2000Ware_MotorControl_SDK_5_04_00_00\solutions\boostxl_3phganinv\f28p55x

    Best,

    Kevin