【TI 测评】从两段点亮msp432的LED的程序说起

第一个程序：

/*******************************************************************************
 * MSP432 GPIO - Toggle Output High/Low
 *
 * Description: In this very simple example, the LED on P1.0 is configured as
 * an output using DriverLib's GPIO APIs. An infinite loop is then started
 * which will continuously toggle the GPIO and effectively blink the LED.
 *
 *                MSP432P401
 *             ------------------
 *         /|\|                  |
 *          | |                  |
 *          --|RST         P1.0  |---> P1.0 LED
 *            |                  |
 *            |                  |
 *            |                  |
 *            |                  |
 *
 * Author: Timothy Logan
 ******************************************************************************/
/* DriverLib Includes */
#include "driverlib.h"

/* Standard Includes */
#include <stdint.h>

#include <stdbool.h>

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);
    }
}

第二个程序：

//***************************************************************************************
//  Blink the LED Demo - Software Toggle P1.0
//
//  Description; Toggle P1.0 inside of a software loop.
//  ACLK = n/a, MCLK = SMCLK = default DCO
//
//                MSP432P4xx
//             -----------------
//         /|\|              XIN|-
//          | |                 |
//          --|RST          XOUT|-
//            |                 |
//            |             P1.0|-->LED
//
//  E. Chen
//  Texas Instruments, Inc
//  March 2015
//  Built with Code Composer Studio v6
//***************************************************************************************

#include <ti/devices/msp432p4xx/driverlib/driverlib.h>

int main(void)
{
    volatile uint32_t i;

    // Stop watchdog timer
    WDT_A_hold(WDT_A_BASE);

    // Set P1.0 to output direction
    GPIO_setAsOutputPin(
        GPIO_PORT_P1,
        GPIO_PIN0
        );

    while(1)
    {
        // Toggle P1.0 output
        GPIO_toggleOutputOnPin(
            GPIO_PORT_P1,
			GPIO_PIN0
			);

        // Delay
        for(i=100000; i>0; i--);
    }
}