{"id":15,"date":"2024-05-06T07:45:49","date_gmt":"2024-05-06T07:45:49","guid":{"rendered":"https:\/\/xtronix.in\/?p=15"},"modified":"2025-02-27T12:33:41","modified_gmt":"2025-02-27T12:33:41","slug":"blink-with-timer-msp430","status":"publish","type":"post","link":"https:\/\/xtronix.in\/?p=15","title":{"rendered":"Blink with Timer MSP430"},"content":{"rendered":"\n

Blinking the Internal LED on MSP430F5529LP:<\/strong> To blink the internal LED (LED1) on the MSP430F5529LP Launch Pad, you can use a timer interrupt. Here\u2019s an example code snippet that achieves this:<\/p>\n\n\n\n

<\/p>\n\n\n\n

#include <msp430.h>\n#include <msp430f5529.h>\n\nunsigned int timerCount = 0;\n\nvoid main(void) {\n    WDTCTL = WDTPW + WDTHOLD; \/\/ Disable watchdog\n    P1DIR |= BIT0; \/\/ Set P1.0 (LED1) to output direction\n    P1OUT &= ~BIT0; \/\/ Turn off the LED initially\n\n    TA0CCR0 = (32768 - 1); \/\/ Set timer period (32768 cycles for 1 second)\n    TA0CCTL0 = (CCIE + OUTMOD_6); \/\/ Enable interrupts for CCR0, toggle output\n    TA0CTL = (TASSEL_0 + MC_1 + ID_3 + TACLR); \/\/ SMCLK, div 8, up mode, clear timer\n\n    __enable_interrupt(); \/\/ Enable global interrupts\n\n    for (;;) {\n        \/\/ Do nothing while waiting for interrupts. Ideal place to use low power modes!\n    }\n}\n\n#pragma vector = TIMER0_A0_VECTOR\n__interrupt void Timer0_A0_ISR(void) {\n    timerCount = (timerCount + 1) % 3;\n    if (timerCount == 0) {\n        P1OUT ^= BIT0; \/\/ Toggle LED1\n    }\n}<\/code><\/pre>\n\n\n\n
    \n
  1. Make sure to initialize the timer and interrupt correctly. The example above uses Timer A0 and toggles the LED every third interrupt. Adjust the timer settings as needed<\/a>1<\/sup><\/a>.<\/li>\n\n\n\n
  2. Using LPM3 for Delay and Wake-Up:<\/strong> If you want to generate a delay using Low-Power Mode 3 (LPM3) and wake up after the delay, follow these steps:\n