LCD1602液晶显示与4&amp#215;4矩阵键盘(共6页).doc

一、要求：液晶显示器第一行显示“Hello World!”；第二行显示键盘的键值。二、程序代码：#include #include #define uchar unsigned char#define uint unsigned intunsigned char code dis1=Hello World!;uchar key_val=0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G;sbit U3_DS=P15;sbit U3_STCP=P14;sbit U3_SHCP=P13;sbit U4_DS=P12;sbit U4_STCP=P11;sbit U4_SHCP=P10;void delay(unsigned int n);/74HC595void U3_595(unsigned char num) unsigned char count1;