Protues仿真实例（8051）-4x4行列键盘.rar

/*--------------------------------------------------------------------- LCD1602.C文件 LCD1602的函数 作者：Computer-lov 创建日期:2004.11.12 最后修改日期:2004.11.12 版本：1.0 ----------------------------------------------------------------------*/ #include "hardware.h" #include "lcd1602.h" void LCD_check_busy(void) //检测LCD状态，看它是不是还在忙呢 { while(1) { LCD_EN=0; LCD_RS=0; LCD_RW=1; LCD_DATA=0xff; LCD_EN=1; if(!LCD_BUSY)break; } LCD_EN=0; } void LCD_cls(void) //LCD清屏 { LCD_check_busy(); LCD_RS=0; LCD_RW=0; LCD_DATA=1; LCD_EN=1; LCD_EN=0; } void LCD_write_instruction(unsigned char LCD_instruction) //写指令到LCD { LCD_check_busy(); LCD_RS=0; LCD_RW=0; LCD_DATA=LCD_instruction; LCD_EN=1; LCD_EN=0; } void LCD_write_data(unsigned char LCD_data) //输出一个字节数据到LCD { LCD_check_busy(); LCD_RS=1; LCD_RW=0; LCD_DATA=LCD_data; LCD_EN=1; LCD_EN=0; } void LCD_set_position(unsigned char x) //LCD光标定位到x处 { LCD_write_instruction(0x80+x); } /* void LCD_go_home(void) //LCD光标归位 { LCD_write_instruction(LCD_GO_HOME); } */ void LCD_printc(unsigned char lcd_data) //输出一个字符到LCD { LCD_write_data(lcd_data); } void LCD_prints(unsigned char *lcd_string) //输出一个字符串到LCD { unsigned char i=0; while(lcd_string[i]!=0x00) { LCD_write_data(lcd_string[i]); i++; } } void LCD_initial(void) //初始化LCD { LCD_write_instruction(LCD_AC_AUTO_INCREMENT|LCD_MOVE_DISENABLE); LCD_write_instruction(LCD_DISPLAY_ON|LCD_CURSOR_OFF); LCD_write_instruction(LCD_DISPLAY_DOUBLE_LINE); LCD_cls(); }