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TMS320F280049C: F280049C CLA used peripherals initialization

Jiakai Ye
Expert 1190 points
Part Number: TMS320F280049C

Hi

In F280049C, all peripherals can be used either in main CPU or CLA, these can be set at register GPxCSELy.GPIOn,

Since some peripherals are only accessed from registers in the interrupt routine, so even they are used in CLA,

the program can still set them to the main CPU and set register values in CLA interrupt routine.

For example, the program may set PWM1 to CPU1 but it still can set eCMP1.CMPA value to renew PWM1's duty cycle.

Could you please list all peripherals that are used in CLA but program can them to CPU1 at the register GPxCSELy.GPIOn?

Thanks,

Jiakai

  • 0
    TI__Expert 7695 points

    Hi Jaikai,

    Are you looking for information on which peripherals are accessible by CPU and CLA, then that information is listed in the data sheet, look at section " Bus Architecture – Peripheral Connectivity" of of F28004x datasheet.

    Let me know if there are further questions.

    Thanks,

    Ashwini

  • 0 in reply to Ashwini Athalye
    Expert 1190 points

    Hi Ashwini,

    Thank you for the quick reply.

    I know some peripherals can be accessed by both CPU1 and CLA1, I want to know the difference if the program

    sets a peripheral to CPU1 or CLA1.

    If a peripheral is set to CPU1, can program set the peripheral's register in CLA?

    If yes, that means the peripheral registers can be updated from both CPU1 and CLA1, How does F280049C handle access conflicts?

    Thanks,

    Jiakai

  • 0 in reply to Jiakai Ye
    TI__Expert 7695 points

    Hi Jiakai,

    Please see section "5.2.3 Shared Peripherals and EALLOW Protection" in the TRM which talks about arbitration for shared peripheral access.

    Thanks,

    Ashwini