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#include <reg51.h>
#define uchar unsigned char
#define uint unsigned int
sbit open = P2^0; //啟動電機按鍵
sbit close = P2^1; //關閉電機按鍵
sbit swap = P2^2; //正反轉按鍵
sbit sub_speed = P2^3; //減速按鍵
sbit add_speed = P2^4; //加速按鍵
sbit PWM1 = P3^0;
sbit PWM2 = P3^1;
/*液晶顯示*/
sbit E=P3^7;
sbit RW = P3^6;
sbit RS = P3^5;
sbit test = P3^4;
int time = 0;
int high = 20;
int period = 30;
int change = 0;
int flag = 0;
int num_medium = 0;
int num_display = 0;
int count_speed = 0;
uchar wword[]={0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39};
/*延時t毫秒*/
void delay(uchar t)
{
uint i;
while(t)
{
/*對于11.0592MHz時鐘，延時1ms*/
for(i=0;i<125;i++);
t--;
}
}
//寫命令函數LCD
void wc51r(uchar j)
{
//fbusy();
RS=0;
RW=0;
P1=j;
E=1;
E=0;
delay(3);
}
//寫數據函數LCD
void wc51ddr(uchar j)
{
RS=1;
RW=0;
P1=j;
E=1;
E=0;
delay(2);
}
//初始化函數LCD
void init()
{
wc51r(0x01); //清屏
wc51r(0x38); //使用8位數據，顯示兩行，使用5*7的字型
wc51r(0x0c); //顯示器件，光標開，字符不閃爍
wc51r(0x06); //字符不動，光標自動右移一格
}
/***********T0中斷服務程序************PWM波的生成**********/
void time0_int(void) interrupt 1
{
time++;
TH0 = 0xec;
TL0 = 0x78; //60536
if(change == 0) //正轉
{
PWM2 = 1;
if(time == high) //high初始值20
PWM1=0;
else if(time == period) // period初始值30
{
PWM1 = 1;
time = 0;
}
}
else //反轉
{ PWM1 = 1;
if(time == high)
PWM2=0;
else if(time == period)
{
PWM2 = 1;
time = 0;
}
}
}
/*************************************************************/
/****T1中斷服務程序********單位時間（S）方波的個數*************/
void time1_int(void) interrupt 3
{
count_speed++; //count_speed初始為0
if(count_speed == 20)
{ count_speed = 0;
num_display = num_medium;
num_medium = 0;
}
}
/*************************************************************/
/************************速度顯示的數據處理********************/
void datamade()
{ uint data MM,NN;
wc51r(0xc2);
wc51ddr('S');
wc51ddr('p');
wc51ddr('e');
wc51ddr('e');
wc51ddr('d');
wc51ddr(0x3a);
NN = num_display%100;
MM = num_display/100;
wc51ddr(wword[MM]);
MM = NN/10;
NN = NN%10;
wc51ddr(wword[MM]);
wc51ddr(wword[NN]);
}
/*****************************************************************/
/**********通過按鍵實現對電機開關、調速、轉向的控制***************/
void motor_control()
{
if(open == 1)
EA = 1;
if(close == 1)
EA = 0;
if(swap == 1)
{
change = ~change;
while(swap != 0)
{}
}
if(sub_speed == 1)
{
high++;
if(high == 30)
EA=0;
while(sub_speed != 0)
{}
}
if(add_speed == 1)
{
high--;
if(high == 5)
high = 5;
while(add_speed != 0)
{}
}
}
/******************************************************************/
/***************************主函數*********************************/
void main()
{
P2 = 0x00;
ET0 = 1;
ET1 = 1;
TMOD = 0x11;
TH0 = 0xec;
TL0 = 0x78;
TH1 = 0x3c;
TL1 = 0xb0; //15536
TR0 = 1;
TR1 = 1;
init(); //液晶顯示初始化程序
while(1)
{
wc51r(0x84);
wc51ddr('H');
wc51ddr('e');
wc51ddr('l');
wc51ddr('l');
wc51ddr('o');
if(test == 0)
num_medium++;
datamade();
motor_control();
…………限于本文篇幅余下代碼請從51黑下載附件…………

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