TMS320F280040-Q1: EPWMXLINK and driverlib: Is there any support or example?

Hi Luciano,

We do not have any available ready example showcasing the use case of EPWMXLINK feature, but there is a driverlib function available which you can use directly in your EPWM initialization and shouldn't be challenging to implement. Please find below the snippet from epwm.h file -

//*****************************************************************************
//
//! Sets the EPWM links.
//!
//! \param base is the base address of the EPWM module.
//! \param epwmLink is the ePWM instance to link with.
//! \param linkComp is the ePWM component to link.
//!
//! This function links the component defined in linkComp in the current ePWM
//! instance with the linkComp component of the ePWM instance defined by
//! epwmLink. A change (a write) in the value of linkComp component of epwmLink
//! instance, causes a change in the current ePWM linkComp component.
//! For example if the current ePWM is ePWM3 and the values of epwmLink and
//! linkComp are EPWM_LINK_WITH_EPWM_1 and EPWM_LINK_COMP_C respectively,
//! then a write to COMPC register in ePWM1, will result in a simultaneous
//! write to COMPC register in ePWM3.
//! Valid values for epwmLink are:
//!   - EPWM_LINK_WITH_EPWM_1  - link current ePWM with ePWM1
//!   - EPWM_LINK_WITH_EPWM_2  - link current ePWM with ePWM2
//!   - EPWM_LINK_WITH_EPWM_3  - link current ePWM with ePWM3
//!   - EPWM_LINK_WITH_EPWM_4  - link current ePWM with ePWM4
//!   - EPWM_LINK_WITH_EPWM_5  - link current ePWM with ePWM5
//!   - EPWM_LINK_WITH_EPWM_6  - link current ePWM with ePWM6
//!   - EPWM_LINK_WITH_EPWM_7  - link current ePWM with ePWM7
//!   - EPWM_LINK_WITH_EPWM_8  - link current ePWM with ePWM8
//!
//! Valid values for linkComp are:
//!   - EPWM_LINK_TBPRD   - link TBPRD:TBPRDHR registers
//!   - EPWM_LINK_COMP_A   - link COMPA registers
//!   - EPWM_LINK_COMP_B   - link COMPB registers
//!   - EPWM_LINK_COMP_C   - link COMPC registers
//!   - EPWM_LINK_COMP_D   - link COMPD registers
//!   - EPWM_LINK_GLDCTL2  - link GLDCTL2 registers
//!
//! \return None.
//
//*****************************************************************************
static inline void
EPWM_setupEPWMLinks(uint32_t base, EPWM_CurrentLink epwmLink,
                    EPWM_LinkComponent linkComp)
{
    //
    // Check the arguments
    //
    ASSERT(EPWM_isBaseValid(base));

    //
    // Configure EPWM links
    //
    HWREG(base + EPWM_O_XLINK) =
              ((HWREG(base + EPWM_O_XLINK) & ~((uint32_t)0xFU << linkComp)) |
               ((uint32_t)epwmLink << linkComp));
}

Please go through the description of the function to understand the use case better. Let me know if you need additional clarifications.

Regards,

Aditya

Thank you Aditya, this is exactly what I was looking for. 

Thanks for the fast response,
Cheers.