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TMS570LS3137: NHET pin configuration limitation for PWM and ICU drivers

Prathibha Rajaram
Prodigy 210 points
Part Number: TMS570LS3137

In AUTOSAR_MCAL_TMS570LSx-05.30.00, we are not able to configure PWM for N2HET[16] and above. Also, ICU configuration is not allowed from pins N2HET[0] - [15]. 

Why is such limitations?

How do we meet Customer requirements?

 

  • 0
    TI__Mastermind 19395 points
    Hi Prathibha,

    By design, we are supporting N2HET[0] to N2HET[15] for PWM and N2HET[16] to N2HET[31] for ICU. You only need to configure PWM and ICU drivers and they internally take care of the mechanism used to achieve the required configuration(Period, duty cycles etc).
  • 0 in reply to Vishwanath Reddy
    Prodigy 120 points

    Hello Vishwanath,

    This is not acceptable in our project scenario as HW design is such that

    •  There are PWM channels beyond N2HET[0 - 15]
    •  ICU channels below N2HET[16 - 31]

    Why is this restriction from the MCAL while the controller itself allows any of the N2HET[0 - 31] to be used as PWM \ ICU?

    I see that the implementation of the driver beyond the Init function still supports the PWM and ICU on any of the N2HET[0 - 31].

    How do we proceed in this scenario when the HW \ ECU design cannot be changed?

    Regards

    Niveditha

  • 0 in reply to Niveditha Bangalore
    TI__Mastermind 19395 points

    Hello Niveditha,

    Software limitation on NHET usage are documented in PWM and ICU user guides. Why was hardware designed without considering documented software limitations? Are there hardware requirements/limitations to use PWM on N2HET beyond[0-15] and ICU below [16-31]?