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#include <reg52.h>
typedef unsigned int u16;
typedef unsigned char u8;
#define KEY_PRESS1 1
#define KEY_PRESS2 2
#define KEY_PRESS3 3
#define KEY_PRESS4 4
#define KEY_UNPRESS 0
#define SMG_SORT P0
#define LED_SORT P2
void delay_10us(u16 ten_us)
{
while(ten_us--);
}
u8 NUM_SMG[] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x40};
u8 SELECT_SMG[] = {0x00,0x04,0x08,0x0c,0x10,0x14,0x18,0x1c};
void time0_init()
{
TMOD |= 0x01; //設(shè)置工作方式；定時(shí)器0的工作模式1
TH0 = 0xFC;
TL0 = 0x18;
EA = 1; //中斷總開(kāi)關(guān)
ET0 = 1; //定時(shí)器0允許位
TR0 = 1; //打開(kāi)定時(shí)器0
}
sbit LED1 = P2^0;
static u16 n = 0;
sbit KEY1 = P3^1;
sbit KEY2 = P3^0;
sbit KEY3 = P3^2;
sbit KEY4 = P3^3;
static u8 hour = 0;
static u8 min = 0;
static u8 time = 0;
static u8 scan_state = 0;
void Show_time(u8 ti, u8 loc)
{
u8 a = ti/10;
u8 b = ti%10;
SMG_SORT = NUM_SMG;
P2 = SELECT_SMG[loc];
delay_10us(100);
SMG_SORT = NUM_SMG[a];
P2 = SELECT_SMG[loc+1];
delay_10us(100);
}
void show_line()
{
SMG_SORT = 0x40;
P2 = SELECT_SMG[2];
delay_10us(100);
SMG_SORT = 0x40;
P2 = SELECT_SMG[5];
delay_10us(100);
}
u8 key_scan() // 返回按鍵的狀態(tài) 0 1 2 3 4
{
if(scan_state==0&KEY1==0||KEY2==0||KEY3==0||KEY4==0)
{
delay_10us(1000);
scan_state = 1;
if(KEY1==0 )return 1;
if(KEY2==0 )return 1;
if(KEY3==0 )return 1;
if(KEY4==0 )return 1;
}
else if(KEY1==1&KEY2==1&KEY3==1&KEY4==1)
{
scan_state=0;
}
return 1;
}
void time_ADD()
{
if(KEY4==0)
{
delay_10us(20);
while(!KEY4);
Show_time();
time++;
if(time>59)
{
min++;
time = 0;
if(min>59)
{
hour++;
min = 0;
}
}
}
}
void time_SUB()
{
if(KEY3==0)
{
delay_10us(20);
while(!KEY3); //判斷按鍵是否松手
Show_time();
if(min>0||time>0)
{
time--;
if(time==0)
{
min--;
time=59;
}
}
}
}
void main()
{
time0_init();
LED1 =0;
while(1)
{
Show_time(time,0);
Show_time(min,3);
Show_time(hour,6);
show_line();
}
}
void time0() interrupt 1
{
//注：每次進(jìn)入中斷意味著定時(shí)/和計(jì)數(shù)器已經(jīng)溢出，若要繼續(xù)重復(fù)工作，需要重新賦值
TH0 = 0xFC;
TL0 = 0x18;
n++;
if(n==1000)
{
n = 0;
time += 1;
if(time >= 59)
{
time = 0;
min +=1;
if(min == 60)
{
min = 0;
hour += 1;
if(hour == 24)
{
hour = 0;
}
}
}
}
}
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