代码如下：
1 #include "MSP430F5529.h" 2 void Sys_Init(){ 3 P1DIR |=BIT2; 4 P1SEL |=BIT2; 5 P1DIR |=BIT3; 6 P1SEL |=BIT3; 7 8 P7DIR |=BIT4+BIT0; 9 P7OUT |=BIT4; //AN1=1 反转 10 P7OUT &=~BIT0; //AN2=0 11 12 TA0CCR0=800; 13 TA0CCTL1=OUTMOD_7; 14 TA0CCR1=500; 15 TA0CCTL2=OUTMOD_7; 16 TA0CCR2=500; 17 TA0CTL =TASSEL_1+MC_1+TACLR; 18 } 19 20 int main( void ) 21 { 22 // Stop watchdog timer to prevent time out reset 23 WDTCTL = WDTPW + WDTHOLD; 24 int i; 25 char SpeedMode=0; 26 Sys_Init(); 27 while(1) 28 { 29 for(i=0;i<4000;i++); //延迟 30 31 if(SpeedMode==0) //加速模式下 32 { 33 TA0CCR1++; //占空比不断提高 34 P1DIR |=BIT0; 35 P1OUT |=BIT0; 36 if(TA0CCR1>=500) SpeedMode=1; //到达100%后转为减速模式 37 } 38 if(SpeedMode==1) //减速模式下 39 { 40 TA0CCR1--; //占空比不断降低 41 if(TA0CCR1<=200) SpeedMode=0; //到达40%后转为加速模式 42 } 43 } 44 }