步进电机控制,LCD显示

#include "AT89X51.h"
int delay();
void inti_lcd();
void show_lcd(int);
void cmd_wr();
void ShowState();
void clock(unsigned int Delay) ;
void DoSpeed(); //计算速度
//正转值
#define RIGHT_RUN 1
//反转值
#define LEFT_RUN 0
sbit RS=0xA0;
sbit RW=0xA1;
sbit E=0xA2;
char SpeedChar[]="SPEED(n/min):";
char StateChar[]="RUN STATE:";
char STATE_CW[]="CW";
char STATE_CCW[]="CCW";
char SPEED[3]="050";
unsigned int RunSpeed=50; //速度
unsigned char RunState=RIGHT_RUN; //运行状态
main()
{

/*定时器设置*/
TMOD=0x66; //定时器0，1都为计数方式；方式2；
EA=1; //开中断

TH0=0xff; //定时器0初值FFH；
TL0=0xff;
ET0=1;
TR0=1;

TH1=0xff; //定时器1初值FFH；
TL1=0xff;
ET1=1;
TR1=1;

IT0=1; //脉冲方式
EX0=1; //开外部中断0:加速
IT1=1; //脉冲方式
EX1=1; //开外部中断1:减速

inti_lcd();
DoSpeed();
ShowState();
while(1)
{
clock(RunSpeed);
P0_1=P0_1^0x01;
}

}
//定时器0中断程序:正转
void t_0(void) interrupt 1
{
RunState=RIGHT_RUN;
P0_0=1;
P1=0x01;
cmd_wr();
ShowState();
}

//定时器1中断:反转
void t_1(void) interrupt 3
{
RunState=LEFT_RUN;
P0_0=0;
P1=0x01;
cmd_wr();
ShowState();

}
//中断0:加速程序
void SpeedUp() interrupt 0
{
if(RunSpeed>=12)
RunSpeed=RunSpeed-2;
DoSpeed();
P1=0x01;
cmd_wr();
ShowState();

}
//中断1:减速程序
void SpeedDowm() interrupt 2
{

if(RunSpeed<=100)
RunSpeed=RunSpeed+2;
DoSpeed();
P1=0x01;
cmd_wr();
ShowState();


}
int delay() //判断LCD是否忙
{
int a;
start:

RS=0;
RW=1;
E=0;
for(a=0;a<2;a++);
E=1;
P1=0xff;
if(P1_7==0)
return 0;
else
goto start;
}
void inti_lcd() //设置LCD方式
{
P1=0x38;
cmd_wr();
delay();
P1=0x01; //清除
cmd_wr();
delay();
P1=0x0f;
cmd_wr();
delay();
P1=0x06;
cmd_wr();
delay();
P1=0x0c;
cmd_wr();
delay();
}
void cmd_wr() //写控制字
{
RS=0;
RW=0;
E=0;
E=1;
}
void show_lcd(int i) //LCD显示子程序
{
P1=i;
RS=1;
RW=0;
E=0;
E=1;
}
void ShowState() //显示状态与速度
{
int i=0;
while(SpeedChar[i]!='\0')
{
delay();
show_lcd(SpeedChar[i]);
i++;
}

delay();
P1=0x80 | 0x0d;
cmd_wr();
i=0;
while(SPEED[i]!='\0')
{
delay();
show_lcd(SPEED[i]);
i++;
}
delay();
P1=0xC0;
cmd_wr();
i=0;
while(StateChar[i]!='\0')
{
delay();
show_lcd(StateChar[i]);
i++;
}
delay();
P1=0xC0 | 0x0A;
cmd_wr();
i=0;
if(RunState==RIGHT_RUN)
while(STATE_CW[i]!='\0')
{
delay();
show_lcd(STATE_CW[i]);
i++;
}
else
while(STATE_CCW[i]!='\0')
{
delay();
show_lcd(STATE_CCW[i]);
i++;
}
}
void clock(unsigned int Delay) //1ms延时程序步进电机控制,LCD显示
{ unsigned int i;
for(;Delay>0;Delay--)
for(i=0;i<124;i++);

}
void DoSpeed()
{
SPEED[0]=(1000*6/RunSpeed/100)+48;
SPEED[1]=1000*6/RunSpeed%100/10+48;
SPEED[2]=1000*6/RunSpeed%10+48;
}