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#include<STC12C5A60S2.h>
//單片機(jī)頭文件，儲(chǔ)存一些殊寄存器的地址聲明
#include<intrins.h>
//intrins頭文件儲(chǔ)存51編程中需要使用到空指令_nop_()、字符循環(huán)移位指令_crol_等
#include <stdio.h>
//stdio : "standard input & output"（標(biāo)準(zhǔn)輸入輸出）,C/C++頭文件，把多個(gè)編譯單元（.c或者.cpp文件）公用的內(nèi)容，單獨(dú)放在一個(gè)文件里減少整體代碼尺寸
#define usint unsigned short int //符號(hào)短整型
#define uchar unsigned char //無符號(hào)字符型
#define uint unsigned int //無符號(hào)整型
#define VALID 0 //0
#define INVALID 1 //1
#define LCD_data P0 //LCD數(shù)據(jù)端口P0
sbit LCD_RS = P2^7; //LCD命令和數(shù)據(jù)控制位，1：寫數(shù)據(jù)位，0：寫命令
sbit LCD_RW = P2^6; //LCD讀寫控制位
sbit LCD_EN = P2^5; //LCD使能位
sbit IN1 = P2^0; //電機(jī)
sbit IN2 = P2^1;
sbit ENA = P2^3;
uchar code title2[] = {"電機(jī)轉(zhuǎn)速："};
uchar code ascii[] =
{0x31,0x32,0x33,0x41,0x34,0x35,0x36,0x42,0x37,0x38,0x39,0x43,0x2A,0x30,0x23,0x44}; //數(shù)字和常用字符的ascii碼
uint n = 0; //T0定時(shí)中斷響應(yīng)次數(shù)
uint n_pwm = 0; //用于調(diào)節(jié)pwm占空比
uint c = 0; //外部計(jì)數(shù)中斷響應(yīng)次數(shù)
uint flag_T0 = 0; //定時(shí)器T0溢出flag
uchar th = 0; //脈沖計(jì)數(shù)計(jì)算時(shí)的臨時(shí)變量高位
uchar tl = 0; //……………………………………………低位
uint num_pulse; //脈沖個(gè)數(shù)
void delay_1ms(uint z){ //延時(shí)函數(shù)1ms
uint x,y;
for(x = z; x > 0; x--)
for(y = 920; y > 0; y--);
}
void write_cmd(uchar cmd){ //LCD寫命令函數(shù)
LCD_RS = 0;
LCD_RW = 0;
LCD_EN = 0;
P0 = cmd;
delay_1ms(6);
LCD_EN = 1;
delay_1ms(6);
LCD_EN = 0;
}
void write_dat(uchar dat){ //LCD寫數(shù)據(jù)函數(shù)
LCD_RS = 1;
LCD_RW = 0;
LCD_EN = 0;
P0 = dat;
delay_1ms(5);
LCD_EN = 1;
delay_1ms(5);
LCD_EN = 0;
}
void lcd_pos(uchar X,uchar Y){ //X表示LCD的行數(shù),Y表示LCD的列數(shù)
uchar pos;
if(X == 0){
X = 0x80;
}
else if(X == 1){
X = 0x90;
}
else if(X == 2){
X = 0x88;
}
else if (X == 3){
X = 0x98;
}
pos = X+Y ;
write_cmd(pos); //顯示地址
}
void lcd_init(){
uchar i = 0;
write_cmd(0x30); //基本指令操作
delay_1ms(5);
write_cmd(0x0C); //顯示開，關(guān)光標(biāo)
delay_1ms(5);
write_cmd(0x01); //清除LCD的顯示內(nèi)容
delay_1ms(5);
lcd_pos(0,0); //將LCD光標(biāo)定位到第一行第一列
}
void pulse_dispaly(uint fe) //顯示脈沖個(gè)數(shù)
{
uchar i = 0;
uchar f[7];
for(i = 0; i < 7; i++)
f[i] = '0';
f[0] = ((fe)/100000) +0x30;//十萬位的數(shù)字
f[1] = ((fe)%100000)/10000 +0x30;//萬位的數(shù)字
f[2] = ((fe)%10000)/1000 +0x30;//千位的數(shù)字
f[3] = ((fe)%1000 )/100 +0x30;//百位的數(shù)字
f[4] = ((fe)%100 )/10 +0x30;//十位的數(shù)字
f[5] = ((fe)%10 ) +0x30;//個(gè)位的數(shù)字
f[6] = '\0';
i = 0;
lcd_pos(1,5); //將光標(biāo)定位到第2行第6列開始顯示
while(f[i] != '\0'){
write_dat(f[i]);
i++;
}
}
void display_text(int pos, uchar *text){ //顯示一段字text、pos設(shè)置在第幾行開頭顯示
uchar j;
lcd_pos(pos,0);
while(text[j]!='\0'){
write_dat(text[j]);
j++;
}
j=0;
}
void INIT(){ //初始化函數(shù)
TMOD = 0X51; //定時(shí)器初始化0101_0001
TH0 = (65536-922)/256; //定時(shí)器初值（1ms），0.001s/(1.085*10^(-6))s=922
TL0 = (65536-922)%256;
TH1 = 0X00; //計(jì)數(shù)器初值
TL1 = 0x00;
ET0 = 1; //允許中斷T0
ET1 = 1;
EA = 1; //總中斷開放
TR0 = 1; //啟動(dòng)T0
TR1 = 1; //啟動(dòng)T1
IN2 = 0; //電機(jī)初始化
IN1 = 1;
ENA = 0;
}
void main(){
uchar i;
INIT();
lcd_init(); //LCD初始函數(shù)
display_text(1, title2); //在第2行開頭顯示 "電機(jī)轉(zhuǎn)速："
while(1){
if (flag_T0 == 1){ //1s
/*脈沖計(jì)數(shù)（電機(jī)轉(zhuǎn)速通過脈沖個(gè)數(shù)的方式輸出）*/
th = TH1; //用臨時(shí)變量讀取計(jì)數(shù)器數(shù)值
tl = TL1;
num_pulse = th*256 + tl; //計(jì)數(shù)器16進(jìn)制轉(zhuǎn)10進(jìn)制
TH1 = 0X00; //重新賦計(jì)數(shù)器的值
TL1 = 0x00;
pulse_dispaly(num_pulse); //循環(huán)調(diào)用顯示函數(shù)
th = 0;
tl = 0;
/*脈沖計(jì)數(shù)*/
flag_T0 = 0;
}
}
}
void interrupt_Timer0() interrupt 1 { //定時(shí)器中斷（1ms）
TR0 = 0;
TH0 = (65536-922)/256; //重新賦初值
TL0 = (65536-922)%256;
n++;
n_pwm++; //一個(gè)pwm脈沖周期為10ms，速度10檔可調(diào)
ENA = 1;
if (n_pwm > 10) //超過一個(gè)pwm周期
n_pwm = 1;
if (n_pwm <= 5) //占空比50%
IN1 = 1; //pwm高電平
else
IN1 = 0; //pwm低電平
if(n == 1000){ //計(jì)滿1s
flag_T0 = 1;
n = 0;
}
TR0 = 1;
}
void interrupt_Timer1() interrupt 3 { //計(jì)數(shù)器中斷
TR1 = 0;
TH1 = 0x00; //重新賦值
TL1 = 0x00;
TR1 = 1;
}

復(fù)制代碼