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Initialization clock for ports

Nabila Naorin
Intellectual 600 points


Hi Where can i find the initialization addrss of each port in datasheet?

Thanks

  • 0
    TI__Guru**** 244440 points

    Hi Nabila,

    The Clock Enable address for all peripherals is in System Control Module (0x400FE000). They are kept together as RCGCMODULE (at offset 0x600 onwards til 0x6FC).

    So any peripheral for which you need the clock initialization would be from 0x400FE600 to 0x400FE6FC

    Regards

    Amit

  • 0 in reply to Amit Ashara
    Intellectual 600 points

    Hi What would be the value of  the following?

    #define SYSCTL_RCGC2_GPIOE  ?????

    Also how can i initiate the lock register for port E

    #define GPIO_PORTE_LOCK_R (*((volatile unsigned long *)0x??????)) 

    Thanks

    Nabila



  • 0 in reply to Nabila Naorin
    TI__Guru**** 244440 points

    Hello Nabila,

    The value of the define for SYSCTL_RCGC2_GPIOE would be there in the hw_sysctl.h

    Please note that on Port E the lock can be initiated by writing any other value other than 0x4C4F434B. However it has no effect as the GPIO Commit Register for all other Port-Pin (except JTAG and NMI) are hardwired to 1.

    Regards

    Amit