【正文】 Header file for the low voltage Flash Atmel AT89C51 and AT89LV51.Copyright (c) 19951996 Keil Software, Inc. All rights reserved.*/ifndef AT89X51_HEADER_FILEdefine AT89X51_HEADER_FILE 1/*Byte Registers*/sfr P0 = 0x80。sfr SP = 0x81。sfr DPL = 0x82。sfr DPH = 0x83。sfr PCON = 0x87。sfr TCON = 0x88。sfr TMOD = 0x89。sfr TL0 = 0x8A。sfr TL1 = 0x8B。sfr TH0 = 0x8C。sfr TH1 = 0x8D。sfr P1 = 0x90。sfr SCON = 0x98。sfr SBUF = 0x99。sfr P2 = 0xA0。sfr IE = 0xA8。sfr P3 = 0xB0。sfr IP = 0xB8。sfr PSW = 0xD0。sfr ACC = 0xE0。sfr B = 0xF0。/*P0 Bit Registers*/sbit P0_0 = 0x80。sbit P0_1 = 0x81。sbit P0_2 = 0x82。sbit P0_3 = 0x83。sbit P0_4 = 0x84。sbit P0_5 = 0x85。sbit P0_6 = 0x86。sbit P0_7 = 0x87。/*PCON Bit Values*/define IDL_ 0x01define STOP_ 0x02define PD_ 0x02 /* Alternate definition */define GF0_ 0x04define GF1_ 0x08define SMOD_ 0x80/*TCON Bit Registers*/sbit IT0 = 0x88。sbit IE0 = 0x89。sbit IT1 = 0x8A。sbit IE1 = 0x8B。sbit TR0 = 0x8C。sbit TF0 = 0x8D。sbit TR1 = 0x8E。sbit TF1 = 0x8F。/*TMOD Bit Values*/define T0_M0_ 0x01define T0_M1_ 0x02define T0_CT_ 0x04define T0_GATE_ 0x08define T1_M0_ 0x10define T1_M1_ 0x20define T1_CT_ 0x40define T1_GATE_ 0x80define T1_MASK_ 0xF0define T0_MASK_ 0x0F/*P1 Bit Registers*/sbit P1_0 = 0x90。sbit P1_1 = 0x91。sbit P1_2 = 0x92。sbit P1_3 = 0x93。sbit P1_4 = 0x94。sbit P1_5 = 0x95。sbit P1_6 = 0x96。sbit P1_7 = 0x97。/*SCON Bit Registers*/sbit RI = 0x98。sbit TI = 0x99。sbit RB8 = 0x9A。sbit TB8 = 0x9B。sbit REN = 0x9C。sbit SM2 = 0x9D。sbit SM1 = 0x9E。sbit SM0 = 0x9F。/*P2 Bit Registers*/sbit P2_0 = 0xA0。sbit P2_1 = 0xA1。sbit P2_2 = 0xA2。sbit P2_3 = 0xA3。sbit P2_4 = 0xA4。sbit P2_5 = 0xA5。sbit P2_6 = 0xA6。sbit P2_7 = 0xA7。/*IE Bit Registers*/sbit EX0 = 0xA8。 /* 1=Enable External interrupt 0 */sbit ET0 = 0xA9。 /* 1=Enable Timer 0 interrupt */sbit EX1 = 0xAA。 /* 1=Enable External interrupt 1 */sbit ET1 = 0xAB。 /* 1=Enable Timer 1 interrupt */sbit ES = 0xAC。 /* 1=Enable Serial port interrupt */sbit ET2 = 0xAD。 /* 1=Enable Timer 2 interrupt */sbit EA = 0xAF。 /* 0=Disable all interrupts *//*P3 Bit Registers (Mnemonics amp。 Ports)*/sbit P3_0 = 0xB0。sbit P3_1 = 0xB1。sbit P3_2 = 0xB2。sbit P3_3 = 0xB3。sbit P3_4 = 0xB4。sbit P3_5 = 0xB5。sbit P3_6 = 0xB6。sbit P3_7 = 0xB7。sbit RXD = 0xB0。 /* Serial data input */sbit TXD = 0xB1。 /* Serial data output */sbit INT0 = 0xB2。 /* External interrupt 0 */sbit INT1 = 0xB3。 /* External interrupt 1 */sbit T0 = 0xB4。 /* Timer 0 external input */sbit T1 = 0xB5。 /* Timer 1 external input */sbit WR = 0xB6。 /* External data memory write strobe */sbit RD = 0xB7。 /* External data memory read strobe *//*IP Bit Registers*/sbit PX0 = 0xB8。sbit PT0 = 0xB9。sbit PX1 = 0xBA。sbit PT1 = 0xBB。sbit PS = 0xBC。sbit PT2 = 0xBD。/*PSW Bit Registers*/sbit P = 0xD0。sbit FL = 0xD1。sbit OV = 0xD2。sbit RS0 = 0xD3。sbit RS1 = 0xD4。sbit F0 = 0xD5。sbit AC = 0xD6。sbit CY = 0xD7。/*Interrupt Vectors:Interrupt Address = (Number * 8) + 3*/define IE0_VECTOR 0 /* 0x03 External Interrupt 0 */define TF0_VECTOR 1 /* 0x0B Timer 0 */define IE1_VECTOR 2 /* 0x13 External Interrupt 1 */define TF1_VECTOR 3 /* 0x1B Timer 1 */define SIO_VECTOR 4 /* 0x23 Serial port */endif附錄2 數(shù)字紅外測速系統(tǒng)原理圖附錄3 數(shù)字紅外測速系統(tǒng)程序include //包含單片機寄存器頭文件include //包含_nop_()函數(shù)定義頭文件Unsigned char shuzu[10]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90}。//共陽數(shù)碼管顯示轉(zhuǎn)換[0123456789]unsigned int v。 //儲電機轉(zhuǎn)速unsigned char times。 //儲定時器T0中斷次數(shù)bit flag1。 //計滿1秒鐘標(biāo)志/********************************************************************函數(shù)功能：顯示速度值********************************************************************/void display(unsigned int x){unsigned char j,k,l。 //j,k,l分別儲存溫度的百、十和個位j=x/100。 //取百位k=(x%100)/10。 //取十位l=x%10。 //取個位if(j==0)P1=0xff。 //將百位數(shù)字不顯示elseP1=shuzu[j]。 //將百位數(shù)字的字符常量送數(shù)碼管顯示if(j==0amp。amp。k==0)P1=0xff。 //將百位數(shù)字不顯示elseP1=shuzu[k]。 //將百位數(shù)字的字符常量送數(shù)碼管顯示P2=shuzu[l]。 //將個位數(shù)字的字符常量送數(shù)碼管顯示}void main(void){P0=0X00。P