l297+l298+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 { 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; }