#include#defineucharunsignedchar#defineuintunsignedint#defineulongunsignedlong#defineLED_DATP0sbitLED_SEG0=P2^7;sbitLED_SEG1=P2^6;sbitLED_SEG2=P2^5;sbitLED_SEG3=P2^4;#defineTIME_CYLC100//12M晶振,定时器10ms中断一次我们1秒计算一次转速//1000ms/10ms=100#definePLUS_PER10//码盘的齿数,这里假定码盘上有10个齿,即传感器检测到10个脉冲,认为1圈#defineK1.65//校准系数unsignedcharcodetable[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};uchardataDisbuf[4];//显示缓冲区uintTcounter=0;//时间计数器bitFlag_Fresh=0;//刷新标志bitFlag_clac=0;//计算转速标志bitFlag_Err=0;//超量程标志voidDisplayFresh();//在数码管上显示一个四位数voidClacSpeed();//计算转速,并把结果放入数码管缓冲区voidinit_timer();//初始化定时器T0\T1voidDelay(uintms);//延时函数voidit_timer0()interrupt1/*interruptaddressis0x000b*/{TF0=0;//定时器T0用于数码管的动态刷新TH0=0xC0;TL0=0x00;Flag_Fresh=1;Tcounter++;if(Tcounter>TIME_CYLC){Flag_clac=1;//周期到,该重新计算转速了}}voidit_timer1()interrupt3/*interruptaddressis0x001b*/{TF1=0;//定时器T1用于单位时间内收到的脉冲数//要速度不是很快,T1永远不会益处Flag_Err=1;//如果速度很高,我们应考虑另外一种测速方法:T测速法}voidmain(void){Disbuf[0]=0;//开机时,初始化为0000Disbuf[1]=0;Disbuf[2]=0;Disbuf[3]=0;init_timer();while(1){if(Flag_Fresh){Flag_Fresh=0;DisplayFresh();//定时刷新数码管显示}if(Flag_clac){Flag_clac=0;ClacSpeed();//计算转速,并把结果放入数码管缓冲区Tcounter=0;//周期定时清零TH1=TL1=0x00;//脉冲计数清零}if(Flag_Err)//超量程处理{Disbuf[0]=0x9e;//开机时,初始化为0000Disbuf[1]=0x9e;Disbuf[2]=0x9e;Disbuf[3]=0x9e;while(1){DisplayFresh();//不再测速等待复位i}}}}//在数码管上显示一个四位数voidDisplayFresh(){P2|=0xF0;LED_SEG0=0;LED_DAT=table[Disbuf[0]];Delay(1);P2|=0xF0;LED_SEG1=0;LED_DAT=table[Disbuf[1]];Delay(1);P2|=0xF0;LED_SEG2=0;LED_DAT=table[Disbuf[2]];Delay(1);P2|=0xF0;LED_SEG3=0;LED_DAT=table[Disbuf[3]];Delay(1);P2|=0xF0;}//计算转速,并
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