今日学习任务 |
数码管的显示,计算器的设计 |
今日任务完成情况 |
计算器较好的完成,但数字闪烁 |
今日开发中出现的问题汇总 |
如何进入与跳出循环,计算器各位的顺序问题 |
今日未解决问题 |
无 |
今日开发收获 |
学会了利用单片机,键盘,数码管设计计算器 |
自我评价 |
遇到一些困难但基本完成任务 |
其他 |
无 |
#include <reg51.h>
int key = 0, num1 = 0, num2 = 0;
//共阴数码管表
unsigned char code table[] = {0x3f, 0x06 ,
0x5b , 0x4f , 0x66 , 0x6d, 0x7d ,
0x07 , 0x7f , 0x6f };
void delay()
{
int x=50, i;
while (x--)
{
for (i = 0; i < 10; i++);
}
}
void delay2()
{
int x=60, i;
while (x--)
{
for (i = 0; i < 25; i++);
}
}
void KeyScan()
{
P1 = 0xf0; //判断哪一列被按下
if(P1 != 0xf0)
{
switch(P1)
{
case 0xe0: key = 0; break;
case 0xd0: key = 1; break;
case 0xb0: key = 2; break;
case 0x70: key = 3; break;
}
P1 = 0x0f;//判断哪一行被按下
switch(P1)
{
case 0x0e: key += 1; break;
case 0x0d: key += 5; break;
case 0x0b: key += 9; break;
case 0x07: key += 13; break;
}
while (P1 != 0x0f);
}
}
void display(int n)
{
P2 = ~(1);
P0 = table[n / 100000];
delay();
P2 = ~(1<<1);
P0 = table[(n % 100000)/10000];
delay();
P2 = ~(1<<2);
P0 = table[(n % 10000)/1000];
delay();
P2 = ~(1<<3);
P0 = table[(n % 1000)/100];
delay();
P2 = ~(1<<4);
P0 = table[(n % 100)/10];
delay2();
P2 = ~(1<<5);
P0 = table[n % 10];
delay();
}
int main()
{
int y, display_flag = 0, display_flag2 = 0;
while (display_flag ==0)
{
key = 0;
KeyScan(); //检测按键
switch(key)
{
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
case 8:
case 9:
num1 = num1 * 10 + key;
break;
case 10:
num1 = num1 * 10 + 0;
break;
case 11: //+
display_flag = 1;
break;
case 12: //-
display_flag = 2;
break;
case 13: //*
display_flag = 3;
break;
case 14: // /
display_flag = 4;
break;
}
display(num1);
}
while (display_flag2 != 5)
{
key = 0;
KeyScan(); //检测按键
switch(key)
{
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
case 8:
case 9:
num2 = num2 * 10 + key;
break;
case 10:
num2 = num2 * 10 + 0;
break;
case 15: // =
display_flag2 = 5;
break;
}
display(num2);
}
switch(display_flag)
{
case 1 :
y = num1 + num2;
break;
case 2 :
y = num1 - num2;
break;
case 3 :
y = num1 * num2;
break;
case 4 :
y = num1 / num2;
break;
}
while(1)
{
display(y);
}
return 0;
}