CMI编码译码仿真和源代码

#include "main.h" #define LCD1602_DB P2 //data bus 数据总线 sbit LCD1602_RS = P1^6; sbit LCD1602_RW = P1^5; sbit LCD1602_EN = P1^7; //void main() //{ // unsigned char str[] = "Welcome To Lcd"; // InitLcd1602(); // LcdShowStr(0,0,str); // while(1); //} // void Read_Busy() //忙检测函数，判断bit7是0，允许执行；1禁止 { unsigned char sta; // LCD1602_DB = 0xff; LCD1602_RS = 0; LCD1602_RW = 1; do { LCD1602_EN = 1; sta = LCD1602_DB; LCD1602_EN = 0; //使能，用完就拉低，释放总线 }while(sta & 0x80); } void Lcd1602_Write_Cmd(unsigned char cmd) //写命令 { Read_Busy(); LCD1602_RS = 0; LCD1602_RW = 0; LCD1602_DB = cmd; LCD1602_EN = 1; LCD1602_EN = 0; } void Lcd1602_Write_Data(unsigned char dat) //写数据 { Read_Busy(); LCD1602_RS = 1; LCD1602_RW = 0; LCD1602_DB = dat; LCD1602_EN = 1; LCD1602_EN = 0; } void LcdSetCursor(unsigned char x,unsigned char y) //坐标显示 { unsigned char addr; if(y == 0) addr = 0x00 + x; else addr = 0x40 + x; Lcd1602_Write_Cmd(addr|0x80); } void LcdShowStr(unsigned char x,unsigned char y,unsigned char *str) //显示字符串 { LcdSetCursor(x,y); //当前字符的坐标 while(*str != '\0') { Lcd1602_Write_Data(*str++); } } void InitLcd1602() //1602初始化 { Lcd1602_Write_Cmd(0x38); //打开，5*8,8位数据 Lcd1602_Write_Cmd(0x0c); Lcd1602_Write_Cmd(0x06); Lcd1602_Write_Cmd(0x01); //清屏 }