LCD.rar_1602读写代码_LCD 数据读写_lcd1602

#include <Target.h> #include <C8051F410_defs.h> #define BUSY 0x80 unsigned char LCD_data; void delay(unsigned int t) { for(; t>0; t--); } unsigned char LCD_ReadStatus(void) { LCD_data = 0x00; LCD_RS = 0; LCD_RW = 1; LCD_E = 0; LCD_E = 0; LCD_E = 1; LCD_data = (0x00)|(P0^2 << 7)|(P0^3 <<6)|(P0^6 << 5)|(P0^7 << 4)|(P2^0 << 3)|(P2^1 << 2)|(P2^2 << 1)|(P2^3<<0); while(LCD_data & BUSY); return(LCD_data); } unsigned char LCD_ReadData(void) { LCD_data = 0x00; LCD_RS = 1; LCD_RW = 1; LCD_E = 0; LCD_E = 0; LCD_E = 1; LCD_data = (0x00)|(P0^2 << 7)|(P0^3 <<6)|(P0^6 << 5)|(P0^7 << 4)|(P2^0 << 3)|(P2^1 << 2)|(P2^2 << 1)|(P2^3); return(LCD_data); } void LCD_WriteCommand(unsigned char _data, unsigned char status) { unsigned char temp; if(status) { LCD_ReadStatus(); } temp = _data; LCD_DB7 = (temp >> 7); LCD_DB6 = (temp & 0x7f) >> 6; LCD_DB5 = (temp & 0x3f) >> 5; LCD_DB4 = (temp & 0x1f) >> 4; LCD_DB3 = (temp & 0x0f) >> 3; LCD_DB2 = (temp & 0x07) >> 2; LCD_DB1 = (temp & 0x03) >> 1; LCD_DB0 = (temp & 0x01); LCD_RS = 0; LCD_RW = 0; LCD_E = 0; LCD_E = 0; LCD_E = 1; } void LCD_WriteData(unsigned char _data) { unsigned char temp; temp = _data; LCD_ReadStatus(); //检测忙 LCD_DB7 = (temp >> 7); LCD_DB6 = (temp & 0x7f) >> 6; LCD_DB5 = (temp & 0x3f) >> 5; LCD_DB4 = (temp & 0x1f) >> 4; LCD_DB3 = (temp & 0x0f) >> 3; LCD_DB2 = (temp & 0x07) >> 2; LCD_DB1 = (temp & 0x03) >> 1; LCD_DB0 = (temp & 0x01); LCD_RS = 1; LCD_RW = 0; LCD_E = 0; //若晶振速度太高可以在这后加小的延时 LCD_E = 0; //延时 LCD_E = 1; } void LCD_INIT(void) { LCD_data = 0; LCD_WriteCommand(0x38,0); //三次显示模式设置，不检测忙信号 delay(100); LCD_WriteCommand(0x38,0); delay(100); LCD_WriteCommand(0x38,0); delay(100); LCD_WriteCommand(0x38,1); //显示模式设置,开始要求每次检测忙信号 LCD_WriteCommand(0x08,1); //关闭显示 LCD_WriteCommand(0x01,1); //显示清屏 LCD_WriteCommand(0x06,1); // 显示光标移动设置 LCD_WriteCommand(0x0C,1); // 显示开及光标设置 } void LCD_DisplayChar(unsigned char X, unsigned char Y, unsigned char DData) { Y &= 0x1; X &= 0xF; //限制X不能大于15，Y不能大于1 if(Y) X |= 0x40; //当要显示第二行时地址码+0x40; X |= 0x80; // 算出指令码 LCD_WriteCommand(X, 0); //这里不检测忙信号，发送地址码 LCD_WriteData(DData); } //按指定位置显示一串字符 void LCD_DisplayList(unsigned char X, unsigned char Y, unsigned char code *DData) { unsigned char ListLength; ListLength = 0; Y &= 0x1; X &= 0xF; //限制X不能大于15，Y不能大于1 while (DData[ListLength]>=0x20) //若到达字串尾则退出 { if (X <= 0xF) //X坐标应小于0xF { LCD_DisplayChar(X, Y, DData[ListLength]); //显示单个字符 ListLength++; X++; } } }