gpio_ex1_toggleOutput.c

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/*******************************************************************************
 * MSP430i2xx GPIO - Toggle Output
 *
 * Description: In this example, P1.4 is setup as an output pin. The pin is
 * toggled in the main loop to make the LED blink. The MCLK is slowed down so
 * the LED blinking is visible.
 *
 *
 *                MSP430i2041
 *             ------------------
 *         /|\|                  |
 *          | |                  |
 *          --|RST               |
 *            |                  |
 *            |              P1.4|-->LED
 *            |                  |
 *            |                  |
 *            |                  |
 *
 * Author: Zack Lalanne
 ******************************************************************************/
 
#include "driverlib.h"
 
int main(void) {
 
    WDT_hold(WDT_BASE);
 
    // Set P1.4 as output pin to drive the LED
    GPIO_setAsOutputPin(GPIO_PORT_P1, GPIO_PIN4);
 
    // Slow down clock so we can see LED blink
    // Configure MCLK = ~1MHz
    CS_initClockSignal(CS_MCLK, CS_CLOCK_DIVIDER_16);
 
    while(1) {
        // Toggle the LED state
        GPIO_toggleOutputOnPin(GPIO_PORT_P1, GPIO_PIN4);
        __delay_cycles(100000);
    }
}