PCF8591模数转换及1602LCD显示应用程序(共7页).doc

#include #include #define uchar unsigned char#define uint unsigned int#define Delay4us() _nop_();_nop_();_nop_();_nop_();/引脚定义sbit LCD_RS=P20;sbit LCD_RW=P21;sbit LCD_EN=P22;/延时子程序void DelayMS(int ms) uchar t;while(ms-) for(t=0;t120;t+);/LCD忙状态检测bit LCD_Busy_Check() bit Result;LCD_RS=0;LCD_RW=1;LCD_EN=1; Delay4us(); Result=(bit)(P0 & 0x80);LCD_EN=0;return Result;/写LCD命令void LCD_Write_Command(uchar cm