2020年03月19日 | 按键控制51单片机上面硬件的功能

按键一二三对应51单片机上不同的功能

例如跑马灯，蜂鸣器，呼吸灯，中断之类的

#define FSCLK 11059200 //晶振频率为 11.0592MHz

#include

#include

#include

#define LED_PORT P0

sbit BEEP=P1^4;

unsigned int n = 0;

unsigned int t = 0;

unsigned char xx = 127;

  unsigned char p;

  unsigned char m;

#define uchar unsigned char

#define uint unsigned int

unsigned char code music_tab[] = {

  0x26,0x20,0x20,0x20,0x20,0x20,0x26,0x10,0xff, //ff 休止符

  0x20,0x10,0x20,0x80,0x26,0x20,0x30,0x20,0};

void int0() interrupt 1

{

  TH0 = (65536 - 10000) / 256;//0xd8;

  TL0 = (65536 - 10000) % 256;//0xef;

  n--;}

void Delay(uint time)

{

uint i;

for(i = time;i> 0;i --);

}

sbit LED0 = P0^0;

sbit LED7 = P0^7;

sbit LED1 = P0^1;

sbit LED6 = P0^6;

sbit LED2 = P0^2;

sbit LED5 = P0^5;

sbit LED3 = P0^3;

sbit LED4 = P0^4;

uint flag;

uint time;

uint temp;

uint i;

void Delay_ms(uint time)

{

uint i,j;

for(i = 0;i < time;i ++)

for(j = 0;j < 930;j ++);

}

void main()

{

uchar key;

while(1)

{

key = Key_Scan(); //在while(1)里面不断循环执行按键扫描程序Key_Scan(),Key_Scan()不断将按键的返回值赋给变量key

if(key == 1) //key!=0说明有按键被按下

{

TMOD = 0x01; //配置定时器 0 工作在 16 位定时器模式

//其中 GATE=0，C/T

TH0 = (65536-FSCLK/12/20)/256;

TL0 = (65536-FSCLK/12/20)%256; //20Hz 计数频率，溢出一次需要 50ms

ET0 = 1;  //允许定时器中断

EA = 1; //打开总中断

LED1 = 0;

LED6 = 0;

LED2 = 1;

LED5 = 1;

LED3 = 0;

LED4 = 0;

TR0 = 1;  //打开定时器，开始计数

while(1)

{

if(flag != 0)

{

flag = 0;

LED1 = !LED1;

LED6 = !LED6;

LED2 = !LED2;

LED5 = !LED5;

LED3 = !LED3;

LED4 = !LED4;

}

}

}

if(key == 2)

while(1)

{

for(temp = 0;temp <= 350;temp ++)

{

for(i=0;i<10;i++)

{

LED0 = 0;

 LED7 = 1;

Delay(temp);

LED0 = 1;

LED7 = 0;

Delay(350-temp);

}

}

for(temp = 350;temp > 0;temp--)

{

for(i=0;i<10;i++)

{

LED0 = 0;

LED7 = 1;

Delay(temp);

LED0 = 1;

LED7 = 0;

Delay(350-temp);

}

} 

for(temp = 0;temp <= 350;temp ++)

{

for(i=0;i<10;i++)

{

LED7 = 1;

LED0 = 0;

Delay(temp);

LED7 = 0;

LED0 = 1;

Delay(350-temp);

}

}

for(temp = 350;temp > 0;temp--)

{

for(i=0;i<10;i++)

{

LED7 = 1;

LED0 = 0;

Delay(temp);

LED7 = 0;

LED0 = 1;

Delay(350-temp);

}

}

}

if(key == 3)

{

TMOD = 0x01; //配置定时器 0 工作在 16 位定时器模式

//其中 GATE=0，C/T

TH0 = (65536-FSCLK/12/20)/256;

TL0 = (65536-FSCLK/12/20)%256; //20Hz 计数频率，溢出一次需要 50ms

ET0 = 1;  //允许定时器中断

EA = 1; //打开总中断

LED1 = 0;

LED6 = 0;

LED2 = 1;

LED5 = 1;

LED3 = 0;

LED4 = 0;

TR0 = 1;while(1)

{

if(flag != 0)

{

flag = 0;

LED1 = !LED1;

LED6 = !LED6;

LED2 = !LED2;

LED5 = !LED5;

LED3 = !LED3;

LED4 = !LED4;

for(temp = 0;temp <= 300;temp ++)

{

for(i=0;i<10;i++)

{

LED0 = 0;

 LED7 = 1;

Delay(temp);

LED0 = 1;

LED7 = 0;

Delay(300-temp);

}

}

for(temp = 300;temp > 0;temp--)

{

for(i=0;i<10;i++)

{

LED0 = 0;

LED7 = 1;

Delay(temp);

LED0 = 1;

LED7 = 0;

Delay(300-temp);

}

} 

for(temp = 0;temp <= 300;temp ++)

{

for(i=0;i<10;i++)

{

LED7 = 1;

LED0 = 0;

Delay(temp);

LED7 = 0;

LED0 = 1;

Delay(300-temp);

}

}

for(temp = 300;temp > 0;temp--)

{

for(i=0;i<10;i++)

{

LED7 = 1;

LED0 = 0;

Delay(temp);

LED7 = 0;

LED0 = 1;

Delay(300-temp);

}

}

} 

}

}

if(key == 4)

{

uchar temp = 0xFE,i = 0,flag = 0;

while(1)

{

if(flag == 0)

{

LED_PORT = temp;

Delay_ms(200);//延时0.5s

//移位函数_crol_()包含在头文件intrins.h里面，在#include之后，可以直接调用这个函数

temp=_crol_(temp,4);//循环左移一位（例如：若调用函数前temp：0000 0001 ,调用函数后temp：0000 0010）

i++;

if(i == 7)flag = 1;

}

else 

{

LED_PORT = temp;

Delay_ms(200);//延时0.5s

temp=_cror_(temp,3);//循环左移一位（例如：若调用函数前temp：0000 0001 ,调用函数后temp：1000 0000）

i--;

if(i == 0)flag = 0;

}

}

}

if(key==5)

{

  unsigned char p, m, i;

  TMOD &= 0xf0;

  TMOD |= 0x01;

  TH0 = (65536 - 10000) / 256;//0xd8;

  TL0 = (65536 - 10000) % 256;//0xef;

  TR0 = 1; 

  IE = 0x82;

  while(1) {

   i = 0;

   while(1) {

   p = music_tab[i];

    if (p == 0) break;

    if (p == 0xff) {

     i++;

     n = 10; while(n); // delayms(100);

    } 

    m = music_tab[i++];

    n = music_tab[i++];

    while(n) {BEEP = ~BEEP; Delay(m);}

   } 

   n = 100; while(n);  // delayms(1000);

  }

}

if(key==6)

{}

}

}

void time0() interrupt 1 //中断服务程序

{

TH0 = (65536-FSCLK/12/20)/256;

TL0 = (65536-FSCLK/12/20)%256;

time ++;

if(time == 25)  //每 50ms 进入一次中断，t = 20*50 ms = 1 s。

//实现 1 秒定时

{

time = 0;

flag = 1;

} 

}