测速显示C程序.doc

#include #define uchar unsigned char #define uint unsigned int #define ulong unsigned long uchar a,b,c,d;#define LED_DAT P0sbit pin_SpeedSenser = P35; /速度传感器脉冲信号输出端接在T1上#define TIME_CYLC 100 /12M晶振，定时器10ms 中断一次 我们1秒计算一次转速,1000ms/10ms = 100#define PLUS_PER 2 /码盘的齿数 ，这里假定码盘上有2个齿，即传感器检测到2个脉冲，认为1圈#define K 1.0 /校准系数sbit zhen1=P10;sbit fan1=P11;sbit en1=P12; uchar code loops = 0x7f,0xbf,0xdf,0xef; /定义显示位控制驱动码uchar code table=0x14,0xd7,0x4c,0x45,0x87,0x25,0x24,0x57,0x04,0x05; / 0,1,2,3,4,5,6,7,8,9 uint Tcounter = 0; /时间计数器bit Flag_Fresh = 0; / 刷新标志 bit Flag_clac = 0; /计算转速标志 bit Flag_Err = 0; /超量程标志 /在数码管上显示一个四位数 void DisplayFresh();/计算转速，并把结果放入数码管缓冲区 void ClacSpeed();/初始化定时器void init_timer();/延时函数 void Delay(uint ms);void it_timer0() interrupt 1 /定时器0中断的响应函数 TF0 = 0; /定时器 T0用于数码管的动态刷新 TH0 = 0xD8; /初始化 TL0 = 0xF0; Flag_Fresh = 1; Tcounter+; if(TcounterTIME_CYLC) Flag_clac = 1;/周期到，该重新计算转速了 void it_timer1() interrupt 3 /中断地址是0x001b 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：脉冲宽度算转速 void main(void) init_timer(); while(1) zhen1=1; fan1=0; en1=1; Delay(31); en1=0; Delay(169); 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 /数码管显示字母EEEE,开机时初始化为0000 a = 0x2c; b = 0x2c; c = 0x2c; d = 0x2c; while(1) DisplayFresh();/不再测速 等待复位i /在数码管上显示一个四位数void DisplayFresh() P2 =loops0 ; LED_DAT = tablea; Delay(20); P2 =loops1 ; LED_DAT = tableb; Delay(20); P2 =loops2 ; LED_DAT = tablec; Delay(20); P2 =loops3 ; LED_DAT = tabled; Delay(20);/计算转速，并把结果放入数码管缓冲区void ClacSpeed() uint speed ; ulong PlusCounter; PlusCounter = TH1*256 + TL1; speed = K*(PlusCounter/PLUS_PER);/K是校准系数，如速度不准，调节K的大小 a = (speed/1000)%10; b = (speed/100)%10; c = (speed/10)%10; d = speed%10;void init_timer() /初始化 TMOD = 0x51; /定时10毫秒,TOT1选择软件门方式1,T0定时，T1计数，96页可查 TH0 = 0xD8; /T0初始化 TL0 = 0xF0; ET0=1; /T0中断允许 EA=1; /T0中断 TR0=1; /TO运行 TH1 = 0x00; /T1初始化 TL1 = 0x00; ET1=1; /T1中断允