液晶并行方式

1、精品文档#include<reg52.h>#defineucharunsignedchar#defineuintunsignedint/*端口定义 */#define LCD_data P2sbit LCD_RS=P0A0;sbit LCD_RW=P0A1;sbit LCD_EN=P0A2;sbit LCD_PSB=P0A3;/定义数据口/寄存器选择输入/液晶读写控制/液晶时能控制/串 / 并方式控制sbit key1=P1A0;/按键定义sbit key2=P1A1;sbit key3=P1A2;/*定义变量 */精品文档ucharspeed=11;/即时速度ucharkey;u

2、charkeynum=0;/功能键按下次数intqbwei,gshwei;/*液晶显示字符串定义*/ucharcodedis1="液滴控制ucharcodedis2="设定速度:0000"ucharcodedis3="实时速度:"ucharcodedis4="向前进！向前进！uchardis53;/*函数声明*/voidlcd_init();/LCD初始化voidlcdinit_display();/LCD显示初始化bitlcd_busy();/遇忙检测voidwrite_cmd(ucharcmd);/写命令voidwrite_dat

3、(uchardat);/写数据voidlcd_pos(ucharX,ucharY);/设置显示位置voidwrite_gshb(ucharadd,uchardat);/取位设置voidmatrixkeyscan();/键盘扫描voidMoment_speed(ucharspeed);/实时速度voidlcd_display();/LCD显示voiddelay(uintn);/延时/*主函数*/voidmain()lcdinit_display();while(1)lcd_display();Moment_speed(speed);/*子程序*/voiddelay(uintn)uinti,j;f

4、or(i=n;i>0;i-)for(j=110;j>0;j-);/*液晶子程序*/*/*/*检查LCD忙状态/*lcd_busy为1时，忙，等待。lcd-busy为0时,闲，可写指令与数据。/*/*/*/*/*/bitlcd_busy()bitresult;LCD_RS=0;LCD_RW=1;LCD_EN=1;delay(5);result=(bit)(P0&0x80);LCD_EN=0;return(result);/*写指令数据到/*RS=L,RW=L,E=高脉冲，voidwrite_cmd(ucharcmd)LCD*/D0-D7=指令码*/lcd_busy();LCD

5、_RS=0;LCD_RW=0;LCD_EN=0;P2=cmd;delay(5);LCD_EN=1;delay(5);LCD_EN=0;/*写显示数据到/*RS=H,RW=L,E=高脉冲，LCD*/D0-D7=数据.*/voidwrite_dat(uchardat)lcd_busy();LCD_RS=1;LCD_RW=0;LCD_EN=0;P2=dat;delay(5);LCD_EN=1;delay(5);LCD_EN=0;/*设定显示位置*/voidlcd_pos(ucharX,ucharY)ucharpos;if(X=1)X=0x80;elseif(X=2)X=0x90;elseif(X=3

6、)X=0x88;elseif(X=4)X=0x98;pos=X+Y;write_cmd(pos);/显示地址/*LCD初始化设定*/voidlcd_init()LCD_PSB=1;/并口方式write_cmd(0x34);/扩充指令操作delay(5);write_cmd(0x30);/基本指令操作delay(5);write_cmd(0x0C);/显示开关光标delay(5);write_cmd(0x01);/清除LCD的显示内容delay(5);write_cmd(0x06);/清除LCD的显示内容delay(5);/*初始化显示程序*/voidlcdinit_display()uchar

7、i;delay(5);lcd_init();lcd_pos(1,0);/设置显示位置为第一行的第一个字符i=0;while(dis1i!='0')write_dat(dis1i);i+;lcd_pos(2,0);/设置显示位置为第二行的第一个字符i=0;while(dis2i!='0')write_dat(dis2i);/显示字符i+;lcd_pos(3,0);/设置显示位置为第三行的第一个字符i=0;while(dis3i!='0')write_dat(dis3i);/显示字符i+;lcd_pos(4,0);/设置显示位置为第四行的第一个字符i

8、=0;while(dis4i!='0')write_dat(dis4i);/显示字符i+;voidwrite_gshb(ucharadd,uchardat)ucharshi,ge;shi=dat/10;ge=dat%10;write_cmd(0x90+add);write_dat(0x30+shi);write_dat(0x30+ge);/*键盘扫描*/voidmatrixkeyscan()if(key1=0)delay(10);if(key1=0)key=1;while(!key1);if(key2=0)delay(10);if(key2=0)key=2;while(!key

9、2);if(key3=0)delay(10);if(key3=0)key=3;while(!key3);/*实时速度显示程序*/voidMoment_speed(ucharspeed)uchari,j;dis50=speed/100+0x30;dis51=speed/10%10+0x30;dis52=speed%10+0x30;for(i=0,j=5;i<3;i+,j+)lcd_pos(3,j);write_dat(dis5i);delay(5);/*显示子程序*/voidlcd_display()matrixkeyscan();if(key=1)/功能键按下key=0;keynum+;

10、switch(keynum)case1:lcd_pos(2,5);write_cmd(0x0f);break;case2:lcd_pos(2,6);break;case3:keynum=0;write_cmd(0x0c);break;if(keynum!=0)/只有key1键按下时，才检测键key2，key3if(key=2)/加调节数值key=0;switch(keynum)case 1: qbwei+;if(qbwei=10)qbwei=0;write_gshb(5,qbwei);lcd_pos(2,5);break;case 2: gshwei+;if(gshwei=99)gshwei=0;write_gshb(6,gshwei);lcd_pos(2,6);break;if(key=3)/减调节数值key=0;switch