LCD1602四线编程实现.doc

LCD1602四线编程实现51单片机和LPC23xx系列单片机(2009-05-07 19:49:49) 转载标签： lcd1602四线51单片机lpc23xxit分类： 单片机 第一次调4线的LCD1602，比较困难，或者因为延迟不对，或者因为命令错误，我足足用了一天时间，搞定了4线的1602编程实现。这里提供51单片机和LPC23XX系列单片机的程序。51的程序是我上网找的，可以参考里面的实现步骤，可以直接仿真，但是不知道烧到板子里是否可以。LPC23XX系列单片机的程序可以直接烧写板子里运行，注意里面的管脚定义，因为在proteus里没找到对应的芯片，这里不知是否可以仿真。51程序#include sbit LCM_RW=P20; /定义引脚sbit LCM_RS=P21;sbit LCM_E =P22;#define LCM_Data P1#define Busy 0x80 /用于检测 LCM 状态字中的 Busy 标识void WriteDataLCM(unsigned char Data);void WriteCommandLCM(unsigned char Command);void LCMInit(void);void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData);void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData);void Delayms(unsigned int n);void dellay(unsigned int h);unsigned char code blog_adr = EDNchina;unsigned char code email = ;void main(void) /Delay400Ms(); /启动等待，等 LCM 讲入工作状态 LCMInit(); /LCM 初始化 DisplayListChar(3, 0, blog_adr); DisplayListChar(0, 1, email); while(1);/写数据 RS=H,RW=L,D0D7=数据,E=高脉冲void WriteDataLCM(unsigned char Data) LCM_RS = 1; LCM_RW = 0; LCM_E = 0; LCM_Data =(Data & 0xF0); LCM_E = 1; dellay(100); /短暂延时，代替检测忙状态 LCM_E = 0; LCM_Data =(Data & 0x0F)4; LCM_E = 1; dellay(100); LCM_E = 0;/写指令 RS=L,RW=L,D0D7=指令码,E=高脉冲void WriteCommandLCM(unsigned char Command)dellay(100); /短暂延时，代替检测忙状态 LCM_RS = 0; LCM_RW = 0; LCM_E = 0; LCM_Data =( Command & 0xF0); LCM_E = 1; dellay(100); LCM_E = 0; LCM_Data =( Command & 0x0F )0x1f) /若到达字串尾则退出