LP-MSP430FR2476: About GPIO settings

Actually, it should work. Can you check the IO input by using GPIO_getInputPinValue(), whether it follows the voltage change on this pin.  

#include <driverlib.h>

int main(void) {

    volatile uint32_t i;

    // Stop watchdog timer
    WDT_A_hold(WDT_A_BASE);

    GPIO_setAsInputPin(GPIO_PORT_P2,GPIO_PIN3);
    GPIO_setAsInputPinWithPullUpResistor(GPIO_PORT_P2,GPIO_PIN3);
    GPIO_getInputPinValue(GPIO_PORT_P2,GPIO_PIN3);



    while(1)
    {
          ;


}
}

I have assembled the circuit as shown above, but how should I check it?

By the way,
GPIO_setAsInputPin(GPIO_PORT_P2,GPIO_PIN3);
In the case of GPIO_setAsInputPinWithPullUpResistor(GPIO_PORT_P2,GPIO_PIN3);, the register "P2IN" changes to "0x08" at SW_OFF and "0x00" at SW_ON.
If only GPIO_setAsInputPin(GPIO_PORT_P2,GPIO_PIN3);
Register "P2IN" is "0x00" for both SW_OFF and SW_ON.

On my Launchpad (Rev A), the external pullup on P2.3 (R10) isn't populated.

Also, at some point you need to call

>  PMM_unlockLPM5();

We apologize for the inconvenience.
When I checked the evaluation board, I found that the SW external pull-up resistors "R9" and "R10" were not installed.
Thank you for your advice.

Regarding "PMM_unlockLPM5();", GPIO input/output can be set without any problem without writing any code, but what are the concerns if PMM_unlockLPM5(); is not executed?

Please see the comment:

That if for contolling GPIO which is setted in output mode. As your GPIO is in input mode(High impendence). You can remove this function.