数字频率计数器

1、#include #define BHSEL P2SEL /定义捕获端口#define BH_IO BIT2unsigned long Cyc=0, flag=0,lastflag=0, key=0, j=0;void InitBhTimerA(;void InitSys(;unsigned int translate(unsigned int number;unsigned long getkey(return (key/8;void delay(voidunsigned int i=0;for(; i<2000; i+;P5OUT=0xFF;unsigned int translat

2、e(unsigned int numberunsigned int i=0;switch(numbercase 0: i|=0xFC; break;case 1: i|=0x60; break;case 2: i|=0xDA; break;case 3: i|=0xF2; break;case 4: i|=0x66; break;case 5: i|=0xB6; break;case 6: i|=0xBE; break;case 7: i|=0xE0; break;case 8: i|=0xFE; break;case 9: i|=0xF6; break;return i;void InitB

3、hTimerA( /初始化P6DIR=0XFF; P6OUT=0XFF; P5DIR=0XFF; P5OUT=0X00;TACTL = TASSEL_2+ID_3+TACLR; /定时器A，时钟源：ACLK，连续计数模式CCTL0 = CCIS_1+CM_2+CAP; /选择上降沿捕获，CCIB（P2.2）为信号源，BHSEL |= BH_IO; /选择P2.2使用第二功能TACTL |= MC_2+TACLR; /打开计数器CCTL0 |= CCIE; /捕获中断允许InitSys(;void InitSys(unsigned int iq0;/使用XT2振荡器BCSCTL1&=XT

4、2OFF; /打开XT2振荡器doIFG1 &= OFIFG; / 清除振荡器失效标志for (iq0 = 0xFF; iq0 > 0; iq0-; / 延时，等待XT2起振while (IFG1 & OFIFG != 0; / 判断XT2是否起振BCSCTL2 =SELM_2+SELS; /选择MCLK、SMCLK为XT2_EINT(; /打开全局中断控制，若不需要打开，可以屏蔽本句void setb(void_EINT(;TBCCR0=1000; TBCTL=TBSSEL_2+TBCLR+MC_2; /选择时钟源为SMCLKTBCCTL0 = CCIE;TBCTL |

5、= MC_1+TBCLR; void main(WDTCTL=WDTPW+WDTHOLD; InitBhTimerA(; setb(;P3DIR=0xFF; while(1P6OUT=BIT0;P5OUT=translate(getkey(%10;delay(;P6OUT=BIT1;P5OUT=translate(getkey(/10%10;delay(;P6OUT=BIT2;P5OUT=translate(getkey(/100%10;delay(;P6OUT=BIT3;P5OUT=translate(getkey(/1000%10; delay(;P6OUT=BIT4;P5OUT=tran

6、slate(getkey(/10000%10;delay(;P6OUT=BIT5;P5OUT=translate(getkey(/100000%10; delay(;P6OUT=BIT6;P5OUT=translate(getkey(/1000000%10; delay(;P6OUT=BIT7;P5OUT=translate(getkey(/10000000;delay(;#pragma vector=TIMERA0_VECTOR_interrupt void TimerA0( /捕获中断_EINT(;flag+;#pragma vector=TIMERB0_VECTOR_interrupt void Timer_B0(void /定时器中断函数/_DINT(;if(Cyc=4000j=P3OUT&0X02;if(j=0x02 && flag>10000P3O