#include<stc15f2k60s2.h>
typedef unsigned char u8;
typedef unsigned int u16;
#define key_state_0 0
#define key_state_1 1
#define key_state_2 2
/************* 本地常量声明 **************/
u8 code t_display[]={ //标准字库
// 0 1 2 3 4 5 6 7 8 9 A B C D E F
0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71,
//black - H J K L N o P U t G Q r M y
0x00,0x40,0x76,0x1E,0x70,0x38,0x37,0x5C,0x73,0x3E,0x78,0x3d,0x67,0x50,0x37,0x6e,
0xBF,0x86,0xDB,0xCF,0xE6,0xED,0xFD,0x87,0xFF,0xEF,0x46}; //0. 1. 2. 3. 4. 5. 6. 7. 8. 9. -1
u8 code T_COM[]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80}; //位码
u8 key_scan();
bit key_flag;//按键扫描标志位
/************* 定时器初始化 **************/
void Timer0Init(void) //1毫秒@11.0592MHz
{
AUXR |= 0x80; //定时器时钟1T模式
TMOD &= 0xF0; //设置定时器模式
TL0 = 0xCD; //设置定时初值
TH0 = 0xD4; //设置定时初值
TF0 = 0; //清除TF0标志
TR0 = 1; //定时器0开始计时
ET0 = 1; //定时器中断开
EA = 1; // 开总中断
}
/************* 中断服务程序 **************/
u8 timer0() interrupt 1 using 1
{
static int smg_count=0,key_count =0,i=0;
smg_count++;key_count ++;
//按01234567点亮所有数码管
if(smg_count ==3)
{
smg_count =0;
P2 =0XE0;P0=~t_display[i];P2=0X00;
P2 =0XC0;P0=T_COM[i];P2= 0X00;
i++;
if(i==8)i=0;
}
if(key_count ==10)//每十秒调用一次把按键扫描标志置一
{
key_count =0;
key_flag = 1;
}
}
void main(void)
{
u8 key_val;
Timer0Init();
P2 = 0XA0;P0=0X00;P2=0X00;//close the buzzer and relay
while(1)
{
if(key_flag)
{
key_flag = 0;
key_val = key_scan();
switch(key_val)
{
case 4:P2 =0X80;P0=0X00;P2=0X00;break;
//case 5:break;
//case 6:break;
}
}
}
}
/*************按键扫描程序及状态机消抖 **************/
u8 key_scan()
{
static char key_state=key_state_0;
u8 key1,key2；
u8 key_temp;
u8 key_value;
//行列扫描程序
P30=0;P31=0;P32=0;P33=0;P34=1;P35=1;P42=1;P44=1;
if(P44==0) key1=0x70;
if(P42==0) key1=0xb0;
if(P35==0) key1=0xd0;
if(P34==0) key1=0xe0;
if((P44==1)&&(P42==1)&&(P35==1)&&(P34==1))key1 =0xf0
P30=1;P31=1;P32=1;P33=1;P34=0;P35=0;P42=0;P44=0;
if(P33==0) key2=0x07;
if(P32==0) key2=0x0b;
if(P31==0) key2=0x0d;
if(P30==0) key2=0x0e;
if((P33==1)&&(P32==1)&&(P31==1)&&(P30==1))key2=0x0f
key_temp =key1|key2;
//状态机检测状态程序
switch(key_state)
{
case key_state_0:
if(key_temp!=0xff)key_state = key_state_1;
break;
case key_state_1:
if(key_temp ==0xff)key_state= key_state_0;
else
{
switch(key_value)
{
case 0x77:key_value=4;break;
case 0x7b:key_value=5;break;
case 0x7d:key_value=6;break;
case 0x7e:key_value=7;break;
case 0xb7:key_value=8;break;
case 0xbb:key_value=9;break;
case 0xbd:key_value=10;break;
case 0xbe:key_value=11;break;
case 0xd7:key_value=12;break;
case 0xdb:key_value=13;break;
case 0xdd:key_value=14;break;
case 0xde:key_value=15;break;
case 0xe7:key_value=16;break;
case 0xeb:key_value=17;break;
case 0xed:key_value=18;break;
case 0xee:key_value=19;break;
}
key_state = key_state_2;
}
break;
case key_state_2:
if(key_temp==0xff)key_state=key_state_0;
break;
}
return key_value;
}