液晶1602顯示矩陣鍵盤(pán)

1、精選優(yōu)質(zhì)文檔-傾情為你奉上#include<reg52.h>#include<intrins.h>#define uchar unsigned char#define uint unsigned intsbit lcd_RS=P25;sbit lcd_RW=P26;sbit lcd_en=P27;void delay(uint z) uint i,j; for(i=0;i<200;i+) for(j=0;j<z;j+);* 名稱(chēng) : write_command(uchar com) *功能 : 16

2、02命令函數(shù) * 輸入 : 輸入的命令值 * 輸出 : 無(wú)void write_command(uchar com) /*LCD寫(xiě)命令*/ lcd_RS=0; lcd_RW=0; P0=com; delay(5); lcd_en=1; delay(5); lcd_en=0;void lcd_init() /*LCD初始化*/ write_command(0X38); write_command(0X0e); write_command(0X06); write_command(0X01);* 名稱(chēng)

3、0;: write_data(number)* 功能 : 1602寫(xiě)數(shù)據(jù)函數(shù) * 輸入 : 需要寫(xiě)入1602的數(shù)據(jù) * 輸出 : 無(wú)void write_data(number)/*LCD寫(xiě)數(shù)據(jù)操作*/ lcd_RS=1; lcd_RW=0; P0=number; delay(5); lcd_en=1; delay(5); lcd_en=0;uchar Keyscan() /*掃描子程序*/ uchar i,j,temp,buffer4=0xfe,0xfd,0xfb,0xf7

4、; for(j=0;j<4;j+) P1=bufferj; /*以下三個(gè)_nop_();作用為讓 P1 口的狀態(tài)穩(wěn)定*/ _nop_();_nop_();_nop_();temp=0x10; for(i=0;i<4;i+) if(!(P1&temp) return (i+j*4); temp<<=1; * 名稱(chēng) : L1602_char(uchar hang,uchar lie,char sign) * 功能 : 改變液晶中某位的值，如果要讓第一行，第五個(gè)字符顯示"b" ，調(diào)用該函數(shù)如下 L1602_char(1,5,'b')

5、 * 輸入 : 行，列，需要輸入1602的數(shù)據(jù)* 輸出 : 無(wú) void L1602_char(uchar hang,uchar lie,uchar sign)uchar a;if(hang = 1) a = 0x80;if(hang = 2) a = 0xc0;a = a + lie - 1;write_command(a);write_data(sign); void L1602_string(uchar hang,uchar lie,uchar *p)uchar a;if(hang = 1) a = 0x80;if(hang = 2) a = 0xc0;a = a + lie - 1;write_command(a);while(1)if(*p = '0') break;write_data(*p);p+;void main() uchar key_data; lcd_init();L1602_string(1,1," 4*4 KeyBoard ");L1602_string(2,1,"You Press The ");while(1) P1 = 0xf0;if(P1 != 0xf0)delay(5);if(P1 != 0xf0) key_da