LED Blinking Example


Download and Install Software


We have finally come to a stage we can write the code for LED blinking. Here is the code that blink the LED on the launchpad. 

  1. #include <msp430g2553.h>
  2. // Tutorial LED Blinking from referencedesigner.com
  3.  
  4. // We will use the msp430g255 microcontroller that comes with the launchpad
  5.     unsigned int i = 0;
  6.  
  7.     void main(void)
  8.     {
  9.     WDTCTL = WDTPW + WDTHOLD;
  10.  
  11.     // Stop watchdog timer.
  12.     // Turn off the watchdog timer, otherwise your device will reset. We will learn about it later.
  13.  
  14.     // P1DIR is  configures the port pin as an output or an input. If it is 1 it is Output.
  15.  
  16.     P1DIR = P1DIR | 0x01;
  17.  
  18.    // We could also write P1DIR = 0x01
  19.     P1OUT = 0x01; // Turn the LED off
  20.  
  21.     for (;;)
  22.     //  Infinite loop
  23.  
  24.    {
  25.     if ( (P1OUT & 0x01) == 1)
  26.  
  27.       P1OUT =  0x00;
  28.  
  29.     else P1OUT = 0x01;
  30.  
  31.     for(i=0; i< 20000; i++);
  32.     // This creates a delay.
  33.  
  34.     }
  35.     }


The best way to learn about the LED blinking would be to take a look at the youtube. Make sure you do not miss anything in the option.