msp430x20x3_ta_16.c

C280x C/C++ Header Files and Peripheral Examples The DSP28xx C/C++ peripheral header files and exam

//******************************************************************************
//  MSP430F20xx Demo - Timer_A, PWM TA1-2, Up Mode, DCO SMCLK
//
//  Description: This program generates one PWM output on P1.2 using
//  Timer_A configured for up mode. The value in CCR0, 512-1, defines the PWM
//  period and the value in CCR1 the PWM duty cycles.
//  A 75% duty cycle on P1.2.
//  ACLK = na, SMCLK = MCLK = TACLK = default DCO
//
//               MSP430F20xx
//            -----------------
//        /|\|              XIN|-
//         | |                 |
//         --|RST          XOUT|-
//           |                 |
//           |         P1.2/TA1|--> CCR1 - 75% PWM
//
//   P.Thanigai
//  Texas Instruments Inc.
//  May 2007
//  Built with Code Composer Essentials Version: 2.0
//******************************************************************************

#include  <msp430x20x3.h>

void main(void)
{
  WDTCTL = WDTPW + WDTHOLD;                 // Stop WDT
  P1DIR |= 0x0C;                            // P1.2 and P1.3 output
  P1SEL |= 0x0C;                            // P1.2 and P1.3 TA1/2 options
  CCR0 = 512-1;                             // PWM Period
  CCTL1 = OUTMOD_7;                         // CCR1 reset/set
  CCR1 = 384;                               // CCR1 PWM duty cycle
  TACTL = TASSEL_2 + MC_1;                  // SMCLK, up mode

  _BIS_SR(CPUOFF);                          // Enter LPM0
}