#include<reg51.h>
#include<intrins.h>
typedef unsigned int u16;
typedef unsigned char u8;
//--定义要使用的IO口--//
#define GPIO_DIG P0
#define GPIO_KEY P1
#define READPORTS P2
sbit SRCLK=P3^6;
sbit RCLK=P3^5;
sbit SER=P3^4;
sbit LSA=P2^2;
sbit LSB=P2^3;
sbit LSC=P2^4;
u8 KeyValue;
void delay(u16 i){
while(i--);
}
/*******************************************************************************
* 函 数 名 : KeyDown
* 函数功能 : 检测有按键按下并读取键值
* 输 入 : 无
* 输 出 : 无
*******************************************************************************/
void KeyDown(void)
{
char a=0;
GPIO_KEY=0x0f;
if(GPIO_KEY!=0x0f)//读取按键是否按下
{
delay(1000);//延时10ms进行消抖
if(GPIO_KEY!=0x0f)//再次检测键盘是否按下
{
//测试列
GPIO_KEY=0X0F;
switch(GPIO_KEY)
{
case(0X07): KeyValue=0;break;
case(0X0b): KeyValue=1;break;
case(0X0d): KeyValue=2;break;
case(0X0e): KeyValue=3;break;
}
//测试行
GPIO_KEY=0XF0;
switch(GPIO_KEY)
{
case(0X70): KeyValue=KeyValue;break;
case(0Xb0): KeyValue=KeyValue+4;break;
case(0Xd0): KeyValue=KeyValue+8;break;
case(0Xe0): KeyValue=KeyValue+12;break;
}
while((a<50)&&(GPIO_KEY!=0xf0)) //检测按键松手检测
{
delay(1000);
a++;
}
}
}
}
//--列选通控制--//
unsigned char code TAB[8] = {0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe};
//--点阵字码--//
unsigned char code CHARCODE[16][8] = {
{0x00,0x00,0x3e,0x41,0x41,0x41,0x3e,0x00}, //0
{0x00,0x00,0x00,0x00,0x21,0x7f,0x01,0x00}, //1
{0x00,0x00,0x27,0x45,0x45,0x45,0x39,0x00}, //2
{0x00,0x00,0x22,0x49,0x49,0x49,0x36,0x00}, //3
{0x00,0x00,0x0c,0x14,0x24,0x7f,0x04,0x00}, //4
{0x00,0x00,0x72,0x51,0x51,0x51,0x4e,0x00}, //5
{0x00,0x00,0x3e,0x49,0x49,0x49,0x26,0x00}, //6
{0x00,0x00,0x40,0x40,0x40,0x4f,0x70,0x00}, //7
{0x00,0x00,0x36,0x49,0x49,0x49,0x36,0x00}, //8
{0x00,0x00,0x32,0x49,0x49,0x49,0x3e,0x00}, //9
{0x00,0x00,0x7F,0x48,0x48,0x30,0x00,0x00}, //P
{0x00,0x00,0x7F,0x48,0x4C,0x73,0x00,0x00}, //R
{0x00,0x00,0x7F,0x49,0x49,0x49,0x00,0x00}, //E
{0x00,0x00,0x3E,0x41,0x41,0x62,0x00,0x00}, //C
{0x00,0x00,0x7F,0x08,0x08,0x7F,0x00,0x00}, //H
{0x00,0x00,0x00,0xFF,0xFF,0x00,0x00,0x00}, //I
};
/*******************************************************************************
* 函数名 : Hc595SendByte(unsigned char dat)
* 函数功能 : 想74H595发送一个字节的数据
* 输入 : 无
* 输出 : 无
*******************************************************************************/
void Hc595SendByte(unsigned char dat)
{
unsigned char a;
SRCLK=0;
RCLK=0;
for(a=0;a<8;a++)
{
SER=dat>>7;
dat<<=1;
SRCLK=1;
_nop_();
_nop_();
SRCLK=0;
}
RCLK=1;
_nop_();
_nop_();
RCLK=0;
}
void main(){
LSA=0; //给一个数码管提供位选
LSB=0;
LSC=0;
unsigned char tab, j;
unsigned int i;//无符号整数
while(1){
for(i= 0; i<5000; i++ ){//两个字之间的扫描间隔时间
for(tab=0;tab<8;tab++)
{
KeyDown();
Hc595SendByte(0x00);//消隐
GPIO_DIG = TAB[tab]; //输出字码
Hc595SendByte(CHARCODE[KeyValue][tab]);
delay(2);
}
}
j++;
if(j == 16){
j = 0;
}
}
}
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