Normal operating mode is LPM3.
Trang 1//****************************************************************************** // MSP430G2xx2 Demo - Timer_A, PWM TA1, Up/Down Mode, 32kHz ACLK
//
// Description: This program generates one PWM output on P1.2 using
// Timer_A configured for up/down mode The value in CCR0, 128, defines the // PWM period/2 and the value in CCR1 the PWM duty cycle Using
// 32kHz ACLK as TACLK, the timer period is 7.8ms with a 75% duty cycle on // P1.2 Normal operating mode is LPM3
// ACLK = TACLK = LFXT1 = 32768Hz, MCLK = default DCO
// //* External watch crystal installed on XIN XOUT is required for ACLK *// //
// MSP430G2xx2
//
-// /|\|
XIN|-// | | | 32kHz
// |RST
XOUT|-// | |
// | P1.2/TA1| > CCR1 - 75% PWM
//
// D Dang
// Texas Instruments, Inc
// December 2010
// Built with CCS Version 4.2.0 and IAR Embedded Workbench Version: 5.10
//******************************************************************************
#include <msp430g2452.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 otions
CCR0 = 128; // PWM Period/2
CCTL1 = OUTMOD_6; // CCR1 toggle/set
CCR1 = 32; // CCR1 PWM duty cycle
TACTL = TASSEL_1 + MC_3; // ACLK, up-down mode
_BIS_SR(LPM3_bits); // Enter LPM3
}