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What will be the value you must write to following register in order to enable clock...

What will be the value you must write to following register in order to enable clock for PORTF?

#define          SYSCTL_RCGCGPIO_R      *((volatile unsigned long *) 0x400FE608)

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Answer #1

RCGCGPIO, following register makes the software capable for enabling and disabling GPIO modules to in the RUN phase. After it is enabled CLOCK is provided to the module and whose access to module register is allowed. After getting disabled the CLOCK gets disabled which saves power and the modules registeres who were accessing they create bus fault.

To anable the CLOCK of GPIO port F is done by asserting the 6th bit RCGGPIO register. The exact command used for enabling CLOCK signal is

SYSCTL RCGCGPIO R = 0 x20 ;

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