51单片机之LCD1602的驱动程序

#include   

#include "./delay/delay.h"  

#define LCDPORT P0  

#define LCD_WRITE_DATA   1  

#define LCD_WRITE_COM    0  

sbit RS = P2^4;  

sbit RW = P2^5;  

sbit E = P2^6;  

unsigned char flag = 1;  

unsigned char shi = 23, fen = 59, miao = 50;  

void lcd1602_write(unsigned char byte, unsigned char flag)  

{  

        if(flag)  

        {  

                RS = 1;                    //选择输入的数据为数据  

        }  

        else  

        {  

                RS = 0;                      //选择输入的数据为命令  

        }  

        RW = 0;                           //写  

        E = 1;                            //选中lcd  

        LCDPORT = byte;  

        delay_ms(5);  

        E = 0;                          //失能LCD      高电平有效  

}  

void lcd_init()  

{  

        delay_ms(15);  

      lcd1602_write(0x38,LCD_WRITE_COM);     //设置8位数据接口，两行指令，5*8点阵字符  

      delay_ms(5);  

      lcd1602_write(0x38,LCD_WRITE_COM);  

      delay_ms(5);  

      lcd1602_write(0x38,LCD_WRITE_COM);  

      delay_ms(5);  

      lcd1602_write(0x38,LCD_WRITE_COM);  

      delay_ms(5);  

      lcd1602_write(0x08,LCD_WRITE_COM);            //关闭显示，关闭光标和闪烁  

      delay_ms(5);  

      lcd1602_write(0x01,LCD_WRITE_COM);          //清屏  

      delay_ms(5);  

      lcd1602_write(0x06,LCD_WRITE_COM);        //设置指针方式，画面不平移  

      delay_ms(5);  

      lcd1602_write(0x0c,LCD_WRITE_COM);        //设置指针方式，画面不平移  

      delay_ms(5);  

}  

void lcd_dis_char(unsigned char x, unsigned char y, unsigned char *s)  

{  

        if(0 == x)  

        {  

             lcd1602_write(y + 0x80,LCD_WRITE_COM);  

        }  

        else if(1 == x)  

        {  

             lcd1602_write(y + 0xc0,LCD_WRITE_COM);  

        }  

        while(*s)  

        {  

            lcd1602_write(*s, LCD_WRITE_DATA);  

            s++;  

        }  

}  

void time0_init()  

{  

        EA = 1;  

      TMOD |= 0x01;  

      TH0 = (65536 - 20000) / 255;  

      TL0 = (65536 - 20000) % 255;  

      ET0 = 1;  

      TR0 = 1;  

}  

void time0_isr() interrupt 1  

{  

      static unsigned char i = 0;  

        TH0 = (65536 - 20000) / 255;  

      TL0 = (65536 - 20000) % 255;  

      i++;  

      if(50 == i)  

        {  

                i = 0;  

              miao++;  

              if(60 == miao)  

                {  

                        miao = 0;  

                      fen++;  

                      if(60 == fen)  

                        {  

                                fen = 0;  

                              shi++;  

                              if(24 == shi)  

                                {  

                                        shi = 0;  

                                }  

                        }  

                }  

        }  

}  

void lcd_diaplay_time()      //时间的显示函数  

{  

        lcd1602_write(0x80 + 7, LCD_WRITE_COM);  

      lcd1602_write((shi / 10) + 0x30,LCD_WRITE_DATA);  

      lcd1602_write((shi % 10) + 0x30,LCD_WRITE_DATA);  

        lcd1602_write(':',LCD_WRITE_DATA);  

        lcd1602_write((fen / 10) + 0x30,LCD_WRITE_DATA);  

        lcd1602_write((fen % 10) + 0x30,LCD_WRITE_DATA);  

        lcd1602_write(':',LCD_WRITE_DATA);  

        lcd1602_write((miao / 10) + 0x30,LCD_WRITE_DATA);  

        lcd1602_write((miao % 10) + 0x30,LCD_WRITE_DATA);  

}  

void lcd_dis_hex()        //显示字符或数字  

{  

        unsigned char temp = 0x2b;  

      lcd1602_write(0x80,LCD_WRITE_COM);  

      lcd1602_write((temp / 16) + 0x30,LCD_WRITE_DATA);  

      lcd1602_write((temp % 16) + 0x37,LCD_WRITE_DATA);  

}  

void main()  

{  

      time0_init();  

    lcd_init();  

      lcd_dis_hex();  

        lcd_dis_char(0,2,"time:");  

      while(1)  

        {             

                    lcd_diaplay_time();  

        }  

}