02A_GPIO_input_button

/*
 * 02A_GPIO_input_button: demonstrates push button input to light an LED
 * The button is polled continuously.
 *
 * Frank Milburn 	21 August 2016
 * Developed on MSP-EXP430F5529 LaunchPad Rev1.5 on CCS V6.1, TIv16.6.0.STS
 */

#include "driverlib.h"

#define  RED_LED       GPIO_PORT_P1,GPIO_PIN0
#define  BUTTON1       GPIO_PORT_P2,GPIO_PIN1
#define  PUSHED        0
//--------------------------------  m a i n  -----------------------------------
int main(void) {

	// setup
    WDT_A_hold(WDT_A_BASE);                                 // stop watchdog timer

    GPIO_setAsOutputPin(RED_LED);                           // set red LED port and pin to output direction

    GPIO_setAsInputPinWithPullUpResistor(BUTTON1);          // set button 1 as input, pulled up

    // loop
    for(;;){

    	int buttonStatus = GPIO_getInputPinValue(BUTTON1);  // read button status

    	if (buttonStatus == PUSHED){                        // light LED if button is pushed
    		GPIO_setOutputHighOnPin(RED_LED);
    	}
    	else{
    		GPIO_setOutputLowOnPin(RED_LED);
    	}
    }
}
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