按键切换流水灯模式问题(单片机外部中断)

ID:287932 · 发表于 2018-3-7 18:59

如图，想用一个按键切换流水灯的多种流动模式，但是单片机程序不会，不知道是否需要用到中断。新手不是很会中断，求教程序如何编写

ID:287932 · 发表于 2018-3-7 22:58

新手求教啊

ID:164602 · 发表于 2018-3-8 08:22

我这里有一个与你说的类似的程序，它是用外部中断来切换点阵显示的程序，你自己看看，学习学习，再变成你自己的程序吧。
#include <reg52.h>

#define uchar unsigned char
#define uint unsigned int    //宏定义

sbit KEY=P3^4;    //定义画面切换按键，可以不定义，外部中断会自己认的

uchar KY;
uchar disp;
uchar pic=0,num=0;    //pic为按键次数；num为中断次数

uchar code love[] = {
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFE,0x3F,0x00,0x20,0x00,0x20,0x00,0x20,
0x00,0x20,0x00,0x20,0x00,0x20,0x00,0x20,0x00,0x00,0x00,0x00,0x00,0x00,0xF8,0x0F,
0x04,0x10,0x02,0x20,0x02,0x20,0x02,0x20,0x02,0x20,0x04,0x10,0xF8,0x0F,0x00,0x00,
0x00,0x00,0x00,0x00,0xFE,0x07,0x00,0x08,0x00,0x10,0x00,0x20,0x00,0x20,0x00,0x10,
0x00,0x08,0xFE,0x07,0x00,0x00,0x00,0x00,0x00,0x00,0xFE,0x3F,0x82,0x20,0x82,0x20,
0x82,0x20,0x82,0x20,0x82,0x20,0x82,0x20,0x82,0x20,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*LOVE*/
};

uchar code loveyou[] = {
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x78,0x00,0xFC,0x00,0xFE,0x01,0xFE,0x03,0xFE,0x07,0xFE,0x0F,0xFE,0x1F,0xFC,0x3F,
0xF8,0x7F,0xFC,0x3F,0xFE,0x1F,0xFE,0x0F,0xFE,0x07,0xFE,0x03,0xFE,0x01,0xFC,0x00,
0x78,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00/*心形图案*/
};

uchar code hehe[] = {
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0x01,0x40,0x01,0xC0,0x01,0x00,0x00,0x00,0x00,
0xF0,0x0F,0x08,0x10,0x04,0x20,0x00,0x00,0x00,0x00,0xF0,0x3F,0x08,0x00,0x04,0x00,
0x04,0x00,0x04,0x00,0x08,0x00,0xF0,0x3F,0x00,0x00,0x00,0x00,0x00,0x20,0x00,0x20,
0x00,0x20,0x00,0x20,0x00,0x20,0x00,0x00,0x00,0x00,0xF0,0x3F,0x08,0x00,0x04,0x00,
0x04,0x00,0x04,0x00,0x08,0x00,0xF0,0x3F,0x00,0x00,0x00,0x00,0x04,0x20,0x08,0x10,
0xF0,0x0F,0x00,0x00,0x00,0x00,0xC0,0x01,0x40,0x01,0xC0,0x01,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00/*呵呵o(∩_∩)o图案*/
};

unsigned char code hanzi[] = {

0x80,0x40,0x40,0x40,0x30,0x42,0x1E,0x42,0x10,0x42,0x10,0x42,0x10,0x42,0xFF,0x7F,
0x10,0x42,0x10,0x42,0x10,0x42,0x10,0x42,0x10,0x42,0x10,0x40,0x00,0x40,0x00,0x00,/*"生",0*/
/* (16 X 16 , 宋体 ) */

0x00,0x00,0x00,0x00,0x00,0x00,0xFE,0xFF,0x82,0x40,0x82,0x40,0x82,0x40,0x82,0x40,
0x82,0x40,0x82,0x40,0x82,0x40,0xFE,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*"日",1*/
/* (16 X 16 , 宋体 ) */

0x00,0x01,0xE0,0x00,0x00,0x00,0xFF,0xFF,0x10,0x00,0x20,0x81,0x08,0x41,0x08,0x31,
0x08,0x0D,0xFF,0x03,0x08,0x0D,0x08,0x31,0xF8,0x41,0x00,0x81,0x00,0x81,0x00,0x00,/*"快",2*/
/* (16 X 16 , 宋体 ) */

0x00,0x00,0x00,0x20,0xE0,0x10,0x9C,0x08,0x84,0x06,0x84,0x40,0x84,0x80,0xF4,0x7F,
0x82,0x00,0x82,0x00,0x83,0x02,0x82,0x04,0x80,0x08,0x80,0x30,0x00,0x00,0x00,0x00,/*"乐",3*/
/* (16 X 16 , 宋体 ) */

0x20,0x00,0x24,0x08,0x24,0x48,0x24,0x84,0xFE,0x7F,0x23,0x02,0x22,0x41,0x20,0x40,
0x20,0x20,0xFF,0x13,0x20,0x0C,0x22,0x14,0x2C,0x22,0xA0,0x41,0x20,0xF8,0x00,0x00,/*"我",4*/
/* (16 X 16 , 宋体 ) */

0x80,0x00,0x64,0x41,0x2C,0x21,0x34,0x91,0x24,0x89,0x24,0x87,0xEC,0x4D,0x32,0x55,
0x22,0x25,0x22,0x25,0x32,0x55,0x2E,0x4D,0x23,0x81,0xA2,0x80,0x60,0x80,0x00,0x00,/*"爱",5*/
/* (16 X 16 , 宋体 ) */

0x00,0x01,0x80,0x00,0x60,0x00,0xF8,0xFF,0x07,0x00,0x40,0x10,0x20,0x0C,0x18,0x03,
0x0F,0x40,0x08,0x80,0xC8,0x7F,0x08,0x00,0x08,0x01,0x28,0x06,0x18,0x18,0x00,0x00,/*"你",6*/
/* (16 X 16 , 宋体 ) */

0x00,0x00,0x00,0x00,0x00,0x00,0xFE,0x33,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*"！",7*/
/* (16 X 16 , 宋体 ) */

}; //汉字编码
/********显示编码END*******************/

/**********函数声明******************/
void display1(void); //显示汉字子函数
void display2(void); //显示LOVE图案子函数
void display3(void); //显示心形图案子函数
void display4(void); //显示笑脸图案子函数

/*********n（us）延时子程序***********/
void DelayUs(uint M)
{
uint x;
for(x=0;x<=M;x++);
}
/**********INT0中断服务程序***********/
void intersvr0(void) interrupt 0 using 1
{
KY=~KY;  //每个摇动来回水银开关会在摆幅两端分别产生下降沿中断，只提取其中一次（从左向右摇才显示）
if(KY==0)
{
      num++;    //计算中断次数
      switch(pic)    //选择画面
      {
         case 0:
            display1();break;
         case 1:
            display2();break;
         case 2:
            display3();break;
         case 3:
            display4();break;
         default:
            display1();
      }
}
}
/*********显示子程序1（汉字）*********/
void display1(void)
{
uchar i;
if(num>10)
{
      disp++;
      num=0;
}    //12个汉字分为3次显示完（每次显示4个），每中断10次切换
if(disp>=2)
disp=0;
DelayUs(3400);    //此处延时时间依各硬件差别而各不相同，试着调整使得显示内容居中即可
for(i=0;i<64;i++)
{
      P1=~hanzi[disp*128+i*2];
      P2=~hanzi[disp*128+i*2+1];
      DelayUs(95);
      P2=0xff;
      P1=0xff;
}
}
/***********显示子程序2（LOVE）********/
void display2(void)
{
uchar i;
DelayUs(2000);
for(i=0;i<64;i++)
{
      P1=~love[i*2];
      P2=~love[i*2+1];
      DelayUs(130);
}
}
/*******显示子程序3（心形图案）*******/
void display3(void)
{
uchar i;
DelayUs(1100);
for(i=0;i<64;i++)
{
      P1=~loveyou[i*2];
      P2=~loveyou[i*2+1];
      DelayUs(200);
}
}
/********显示子程序4（呵呵o(∩_∩)o图案）********/
void display4(void)
{
uchar i;
DelayUs(2500);
for(i=0;i<64;i++)
{
      P1=~hehe[i*2];
      P2=~hehe[i*2+1];
      DelayUs(120);
}
}
/*****主函数*****/
void main(void)
{
IT0=1;
EX0=1;
EA=1;    //开中断，下降沿中断
KY=0;
while(1)    //主程序中只检测按键
{
      if(KEY==0)    //画面切换键按下
      {
         DelayUs(10000); //按键去抖
         if(KEY==0);
         pic++;
if(pic>3)pic=0;
while(KEY==0);

      }

}
}

ID:289136 · 发表于 2018-3-8 12:56

可以定义一个变量记录按下的次数来控制流动方式

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