CCS/MSP432P401R: MSP432P401R programming in Code Composer Studio

Just use the MSP432 GPIO examples. Using DriverLib:

int main(void)
{
volatile uint32_t ii;
/* Halting the Watchdog */
MAP_WDT_A_holdTimer();
/* Configuring P1.0 as output */
MAP_GPIO_setAsOutputPin(GPIO_PORT_P1, GPIO_PIN0);
while (1)
{
/* Delay Loop */
for(ii=0;ii<5000;ii++)
{
}
MAP_GPIO_toggleOutputOnPin(GPIO_PORT_P1, GPIO_PIN0);
}
}

Thank you Keith. I will look into the documentation. Meanwhile, I wrote a program to turn on the LED when the button is pressed and the LED should turn off when the button is released.

#include <msp432p401r.h>

/**
* main.c
*/
void button1_init(void){
P1->SEL0 &= ~0x02;
P1->SEL1 &= ~0x02;
P1->DIR &= ~0x02;
}

void LED_ouit(void){
P1->SEL0 &= ~0x01;
P1->SEL1 &= ~0x01;
P1->DIR |= 0x01;
}

void LED_exe(uint8_t new){
/*uint8_t old;
old = P1->OUT;
old = old&(~0x01);
new = new|old;*/
P1->OUT =new;
}

uint8_t button_exe(void)
{
uint8_t button;
button = P1->IN;
button = button&0x02;
return button;
}

void main(void)
{
uint8_t data;
int i;
WDT_A->CTL = WDT_A_CTL_PW | WDT_A_CTL_HOLD; // stop watchdog timer
button1_init();
LED_ouit();

while(1){

for(i=1;i<500;i++){

}

data = button_exe();

if(data==2){
LED_exe(1);
}
else{
LED_exe(0);
}
}
}

But unfortunately ,When I executed the program, The LED is turned ON and doesnot follow the input button press. could you please look into the code and kindly let me know what mistake i would have done probably.

Thanks.