基于msp430g2553（launchpad）的pwm输出程序

只看该作者 · 2014-7-4 16:23

include  <msp430g2553.h>
void main(void)
{WDTCTL = WDTPW + WDTHOLD;                // Stop watchdog timer
if (CALBC1_1MHZ ==0xFF || CALDCO_1MHZ == 0xFF)
{
while(1);          // If calibration constants erased, trap CPU!!
}
BCSCTL1 = CALBC1_1MHZ;    // Set range
DCOCTL = CALDCO_1MHZ;    // Set DCO step + modulation
BCSCTL3 |= LFXT1S_2;                   // LFXT1 = VLO

IFG1 &= ~OFIFG;                         // Clear OSCFault flag
BCSCTL1 |= DIVA_3;//设置辅助时钟其源是LFXT1，对其8分频  // ACLK = VLO/8
BCSCTL2 |= SELM_3 + DIVM_3 + DIVS_3;    // MCLK = DCO/8, SMCLK = DCO/8

P1DIR|=BIT2;
P1SEL|=BIT2;
//以上(理论上要设置6个)2句是将P1.2用于输出PWM的设置

TACTL = TASSEL_2 + MC_1;       // Source: 1/1*SMCLK, UP mode 增允许中断
CCR0 = 3100;//Timer count 5100
CCR1 = 1000;
CCTL1 |= OUTMOD_3;

_BIS_SR(GIE);
for(;;);
}