矩阵键盘状态机之74HC164驱动数码管依次显示键值

用视图Web模式看uchar code smg_duan[]= //数码管（共阴）编码0-F，全灭; 按键对应的数字不是上图，而是-------------------------这里下面的{//用IO口P0，所以把A B C D E F G DP分别接到P0^0 P0^1 P0^2 P0^3 P0^4 P0^5 P0^6 PO^7 所以编码如下---------- --------------|-1--|-2--|-3--|-----------------------------------|-4--|-5--|-6--|-----------------------0X3f,0X06,0X5B,0X4f,0X66,0X6D,0X7D,0x07,0x7f,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x7 1,0X00---------------|-7--|-8--|-9--|-----------------//可以把0x71或任意一个改为0x00，这样就可以按下0x71这个案件时清楚显示了---------------|-C--|-0--|-E--|---------------------/* 0xfC,0x0C,0xDA,0xF2,0x66,0xB6,0xBE,0xE0,0xFE,0xF6,0xEE,0x3E,0x9C,0x7A,0x9E,0x8E,0x00 //多写了0x00，代表段选全部熄灭*/};0X3f,0X06,0X5B,0X4f,0X66,0X6D,0X7D,0x07,0x7f,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x7 1,0X00//可以把0x71或任意一个改为0x00，这样就可以按下0x71这个案件时清楚显示了完整程序如下：/*==========================================================* 开发人员：laowang* 当前版本：V1.0* 创建时间：11/26/2013* 修改时间：04/21/2017* 功能说明：对4*3矩阵键盘扫描，用4位共阴数码管进行显示，刚开始时不亮，依次按下按键时数码管依次显示0-F，扫描方法为状态机方法+定时器中断* 修改人员：梁超云*==========================================================*/#include<reg52.h>#include"Define.h"#include"display.h"#include"matrixkeyscan.h"#include "74HC164.h"void Timer0_init(); //定时器初始化函数uint flag1=0;uint flag=0; //按键扫描标志，每中断一次，扫描一次bit power_on=1;//主函数void main(){uchar key_state=0;uchar readkey;readkey=0xff;Timer0_init();Display_init(); //使之不亮while(1){if(flag==1){flag=0;flag1++;if(flag1>=4){flag1=0;}readkey=Keyscan();if (power_on==0){power_on=1;num2++;if(num2>=4){num2=0;}DisplayBUFF(readkey);}Display();}}}void Timer0() interrupt 1{// TH0=0xD8; //10Ms产生一次中断// TL0=0xF0;// TH0=0xB1; //20Ms产生一次中断// TL0=0xE0;// TH0=0xec; //5Ms产生一次中断// TL0=0x78;TH0=0x63; //40Ms产生一次中断TL0=0xc0;flag++;}void Timer0_init(){// TH0=0xD8; //12MHz--10Ms产生一次中断// TL0=0xF0;// TH0=0xB1; //20Ms产生一次中断// TL0=0xE0;// TH0=0xec; //5Ms产生一次中断// TL0=0x78;TH0=0x63; //40Ms产生一次中断TL0=0xc0;EA=1;ET0=1;TR0=1;}/*==================硬件电路===============================*说明：数码管为共阴数码管，驱动方式为74hc164扫描方式为动态扫描*==========================================================*/ //梁超云改为P0.0-P0.7直接数码管的A-H，P2接数码管位选#include<reg52.h>#include"Define.h" //把常用的宏定义写成了头文件，包含进来#include"display.h"#include "74HC164.h"#include"matrixkeyscan.h"uchar segbuff[4];uchar num2=0;//sbit wela=P3^5; //位选//sbit dula=P3^4; //段选uchar code smg_duan[]= //数码管（共阴）编码0-F，全灭;{//用IO口P0，所以把A B C D E F G GP分别接到P0^0 P0^1 P0^2 P0^3 P0^4 P0^5 P0^6 PO^7 所以编码如下0X3f,0X06,0X5B,0X4f,0X66,0X6D,0X7D,0x07,0x7f,0x6F,0x77,0x7C,0x39,0x5E,/*0x79*/0 x00,0x71,0X00//用IO口P0，所以把A B C D E F G GP分别接到P0^7 P0^6 P0^5 P0^4 P0^3 P0^2 P0^1 PO^0 所以编码如下//可以把0x79或任意一个改为0x00，这样就可以按下0x79这个案件时清楚显示了//0xfC,0x0C,0xDA,0xF2,0x66,0xB6,0xBE,0xE0,0xFE,0xF6,0xEE,0x3E,0x9C,0x7A,/*0x9E*/ 0X00,0x8E,0x00 //多写了0x00，代表段选全部熄灭};//uchar code smg_wei[]={0xfe,0xfd,0xfB,0xf7};//数据向左移动。

要右移的话就uchar code smg_wei[]={0xf7,0xfB,0xfd,0xfe};/*==========================================================*函数名称：Display_init()*功能：对数码管进行初始化操作*入口参数：*出口参数：void*说明：刚上电时，所有的数码管均不显示*==========================================================*/void Display_init(){P1=0x00; //将所有的位选关闭，所有数码管不亮，// wela=1;// wela=0;P2=0xff; //将段选关闭。

// dula=1;// dula=0;}void Display(){sendbyte(segbuff[flag1%4]);P2=smg_wei[(flag1-1)%4];//保证每次都从左边开始亮，其实是看数码管硬件怎么排位置的// P2=smg_wei[(flag1+3)%4];}/*==========================================================*函数名称：Display（uchar）*功能：数码管静态扫描*入口参数：*出口参数：void*说明：进行段选的显示。

因为位选在刚开始的时候已经弄好了*==========================================================*/void DisplayBUFF(uchar num1)//更新显存{uchar i,x;// wela=1;i=num2%4;//四位数码管所以%4,6位%6,8位%8，以此类推segbuff[i]=smg_duan[num1];x=smg_duan[num1];if(x==0x00){segbuff[0]=0x00;segbuff[1]=0x00;segbuff[2]=0x00;segbuff[3]=0x00;num2=0;flag1=0;}//清空缓存// sendbyte(segbuff[i]);// wela=0;// dula=1;// dula=0;}/*==================硬件电路===============================**说明：矩阵键盘为4*4，数据口为P0，行线为P0.0-P0.3，列线为P0.4-P0.7 20170418梁超云改为P0口，显示字形码接在P1，位在P2*==========================================================*/#include<reg52.h>#include"Define.h"#include"matrixkeyscan.h"#define key P0 //矩阵键盘的数据口#define no_key 0xff //无按键按下#define key_state0 0 //状态0，此时无按键按下#define key_state1 1 //状态1，此时处于确定按键是否按下#define key_state2 2 //状态2，此时判断按键是否释放/*==========================================================*函数名称：Keyscan()*功能：对矩阵键盘进行扫描，扫描方式为状态机+定时器中断*入口参数：*出口参数：key_value,代表具体的键值*说明：有个缺陷，刚开始数码管就亮，还没找到是哪里出了问题（已解决）*==========================================================*/uchar Keyscan(){uchar key_state; //状态指示static uchar key_value; //键值返回uchar key_temp;uchar key1,key2;uchar last_key_value;bit bit_release=0;//释放标志位key=0xf0;key1=key;key1=key&0xf0; //确定哪一行的按键按下key=0x0f;key2=key;key2=key&0x0f; //确定哪一列的按键按下key_temp=key1|key2; //确定按键位置switch(key_state) //检测当前状态{case key_state0: //之前无按键被按下if(key_temp!=no_key) //说明有按键按下或者抖动{key_state=key_state1; //转换为状态1，然后去判断是否真的按下}break;case key_state1: //状态1，说明之前已经有按键按下或者抖动if(key_temp==no_key) //全为高电平，说明是抖动{key_state=key_state0; //返回到状态1，}else //确实有按键被按下{switch(key_temp) //当确定按键按下后，列举所有的按键情况{case 0xee: key_value=1;break;case 0xde: key_value=2;break;case 0xbe: key_value=3;break;//case 0x7e: key_value=13;break;case 0xed: key_value=4;break;case 0xdd: key_value=5;break;case 0xbd: key_value=6;break;//case 0x7d: key_value=10;break;case 0xeb: key_value=7;break;case 0xdb: key_value=8;break;case 0xbb: key_value=9;break;//case 0x7b: key_value=11;break;case 0xe7: key_value=12;break;case 0xd7: key_value=0;break;case 0xb7: key_value=14;break;//case 0x77: key_value=15;break;default: key_value=16;break;/*case 0xee: key_value=0;break;case 0xde: key_value=1;break;case 0xbe: key_value=2;break;case 0x7e: key_value=3;break;case 0xed: key_value=4;break;case 0xdd: key_value=5;break;case 0xbd: key_value=6;break;case 0x7d: key_value=7;break;case 0xeb: key_value=8;break;case 0xdb: key_value=9;break;case 0xbb: key_value=10;break;case 0x7b: key_value=11;break;case 0xe7: key_value=12;break;case 0xd7: key_value=13;break;case 0xb7: key_value=14;break;case 0x77: key_value=15;break;default: key_value=16;break;*/}key_state=key_state2; //跳到状态2，进而判断是否被释放}break;case key_state2: //状态2，判断是否被释放if(key_temp==no_key) //释放，转回到状态0{key_state=key_state0;bit_release=1;}break;}if(key_state==key_state0){last_key_value=key_value;if(bit_release){bit_release=0; /* bit_release 也就是释放标志位*/power_on=0; //解决：有个缺陷，刚开始数码管就亮，还没找到是哪里出了问题}return key_value;}elsereturn last_key_value;}/*==========================================================*74ls164为八位串行输入、并行输出的移位寄存器* 开发人员：梁超云* 当前版本：V1.0* 创建时间：04/21/2017* 修改时间：* 功能说明：74HC164驱动*==========================================================*/#include "reg52.h"#include "Define.h"#include "74HC164.h"void sendbyte(uchar byte) //发送一个字节高位在前{uchar num,c;num=byte;for(c=0;c<8;c++){CLK=0;DAT=num&0x80;CLK=1;num<<=1;}}/*void sendbyte(uchar byte) //发送一个字节低位在前{uchar num,c;num=byte;for(c=0;c<8;c++){CLK=0;DAT=num&0x01;CLK=1;num>>=1;}}*/#ifndef _DISPLAY_H_ //头文件保护符#define _DISPLAY_H_#include"Define.h"extern void Display_init();extern void DisplayBUFF(uchar num1);extern uchar i,num2;extern uchar segbuff[4];extern void Display();#endif#ifndef _MA TRIXKEYSCAN_H_ //头文件保护符#define _MATRIXKEYSCAN_H_#include"Define.h"extern uchar key_value;extern uchar last_key_value;extern uchar key_state;extern uchar Keyscan();extern bit power_on;#endif#ifndef _DEFINE_H_ //头文件保护符#define _DEFINE_H_#define uchar unsigned char //宏定义#define uint unsigned intextern uint flag1;extern uint flag;#endif/*--------------------------------------------------------------------------REG52.HHeader file for generic 80C52 and 80C32 microcontroller.Copyright (c) 1988-2002 Keil Elektronik GmbH and Keil Software, Inc. All rights reserved.--------------------------------------------------------------------------*/#ifndef __REG52_H__#define __REG52_H__/* BYTE Registers */sfr P0 = 0x80;sfr P1 = 0x90;sfr P2 = 0xA0;sfr P3 = 0xB0;sfr PSW = 0xD0;sfr ACC = 0xE0;sfr B = 0xF0;sfr SP = 0x81;sfr DPL = 0x82;sfr DPH = 0x83;sfr PCON = 0x87;sfr TCON = 0x88;sfr TMOD = 0x89;sfr TL0 = 0x8A;sfr TL1 = 0x8B;sfr TH0 = 0x8C;sfr TH1 = 0x8D;sfr IE = 0xA8;sfr IP = 0xB8;sfr SCON = 0x98;sfr SBUF = 0x99;/* 8052 Extensions */sfr T2CON = 0xC8;sfr RCAP2L = 0xCA;sfr RCAP2H = 0xCB;sfr TL2 = 0xCC;sfr TH2 = 0xCD;/* BIT Registers *//* PSW */sbit CY = PSW^7;sbit AC = PSW^6;sbit F0 = PSW^5;sbit RS1 = PSW^4;sbit RS0 = PSW^3;sbit OV = PSW^2;sbit P = PSW^0; //8052 only/* TCON */sbit TF1 = TCON^7;sbit TR1 = TCON^6;sbit TF0 = TCON^5;sbit TR0 = TCON^4;sbit IE1 = TCON^3;sbit IT1 = TCON^2;sbit IE0 = TCON^1;sbit IT0 = TCON^0;/* IE */sbit EA = IE^7;sbit ET2 = IE^5; //8052 only sbit ES = IE^4;sbit ET1 = IE^3;sbit EX1 = IE^2;sbit ET0 = IE^1;sbit EX0 = IE^0;/* IP */sbit PT2 = IP^5;sbit PS = IP^4;sbit PT1 = IP^3;sbit PX1 = IP^2;sbit PT0 = IP^1;sbit PX0 = IP^0;/* P3 */sbit RD = P3^7;sbit WR = P3^6;sbit T1 = P3^5;sbit T0 = P3^4;sbit INT1 = P3^3;sbit INT0 = P3^2;sbit TXD = P3^1;sbit RXD = P3^0;/* SCON */sbit SM0 = SCON^7;sbit SM1 = SCON^6;sbit SM2 = SCON^5;sbit REN = SCON^4;sbit TB8 = SCON^3;sbit RB8 = SCON^2;sbit TI = SCON^1;sbit RI = SCON^0;/* P1 */sbit T2EX = P1^1; // 8052 onlysbit T2 = P1^0; // 8052 only/* T2CON */sbit TF2 = T2CON^7;sbit EXF2 = T2CON^6;sbit RCLK = T2CON^5;sbit TCLK = T2CON^4;sbit EXEN2 = T2CON^3;sbit TR2 = T2CON^2;sbit C_T2 = T2CON^1;sbit CP_RL2 = T2CON^0;#endif#ifndef _74HC164_H_ //头文件保护符#define _74HC164_H_#include"Define.h"sbit DAT=P1^0;sbit CLK=P1^1;extern void sendbyte(uchar byte); #endif。