怎么让开关机时数码管不显示数字，按下开关后才显示数字 -

标题: 怎么让开关机时数码管不显示数字，按下开关后才显示数字 [打印本页]

作者: 陌路狂花 时间: 2017-10-31 22:29
标题: 怎么让开关机时数码管不显示数字，按下开关后才显示数字
按下16个矩阵键盘依次在数码管上显示1-16的平方。如按下第一个显示1，第二个显示4---  ，怎么改怎么让开关机时数码管不显示数字，按下开关后才显示数字。# include <reg52.h>
# define uint unsigned int
# define uchar unsigned char

sbit P_HC595_SER = P2^7; //pin 14 SER data input
sbit P_HC595_RCLK  = P2^5; //pin 12 RCLk store (latch) clock
sbit P_HC595_SRCLK = P2^6; //pin 11 SRCLK Shift data clock

uchar code t_display[]={
//    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, 0x76, 0x79, 0x38, 0x3f, 0}; // ¶ÎÂë
uchar code wei[] = {0xfe, 0xfd, 0xfb, 0xf7, 0xef, 0xdf, 0xbf, 0x7f};
uchar temp;
uint num, num1;
void Send_595(uchar);
void delay(uint);
uint dage();
void display(uchar);
void we(uchar, uchar, uchar);

void main()
{

   Send_595(0xff);
Send_595(0xff);
   P_HC595_RCLK = 0;
P_HC595_RCLK = 1;


   while(1)
{
num1 = dage();

we(num1/100, num1%100/10, num1%10);

}
}

void Send_595(uchar dat)
{
uint i;
for(i=0; i<8; i++)
{
if(dat & 0x80) P_HC595_SER = 1;
else P_HC595_SER = 0;
P_HC595_SRCLK = 0;
P_HC595_SRCLK = 1;
dat = dat << 1;
}
}
void delay(uint z)
{
uint x, y;
for(x=z; x>0; x--)
   for(y=110; y>0; y--);
}

uint dage()
{
P3 = 0xfe;
temp = P3;
temp = temp&0xf0;
  while( temp != 0xf0)
{
delay(5);
temp = P3;
temp = temp&0xf0;
while( temp != 0xf0)
{
temp = P3;
switch(temp)
{
case 0xee : num = 1;
   break;
case 0xde : num = 4;
   break;
case 0xbe : num = 9;
   break;
case 0x7e : num = 16;
   break;
}
while( temp != 0xf0)
{
temp = P3;
temp = temp&0xf0;
}

}
   }

P3 = 0xfd;
temp = P3;
temp = temp&0xf0;
while( temp != 0xf0)
{
delay(5);
temp = P3;
temp = temp&0xf0;
while( temp != 0xf0)
{
temp = P3;
switch(temp)
{
case 0xed : num = 25;
   break;
case 0xdd : num = 36;
   break;
case 0xbd : num = 49;
   break;
case 0x7d : num = 64;
   break;
   }

   while( temp != 0xf0)
{
temp = P3;
temp = temp&0xf0;
}

}
}

P3 = 0xfb;
temp = P3;
temp = temp&0xf0;
while( temp != 0xf0)
{
delay(5);
temp = P3;
temp = temp&0xf0;
while( temp != 0xf0)
{
temp = P3;
switch(temp)
{
case 0xeb : num = 81;
   break;
case 0xdb : num = 100;
   break;
case 0xbb : num = 121;
   break;
case 0x7b : num = 144;
   break;
   }

   while( temp != 0xf0)
{
temp = P3;
temp = temp&0xf0;
}

}
}

P3 = 0xf7;
temp = P3;
temp = temp&0xf0;
while( temp != 0xf0)
{
delay(5);
temp = P3;
temp = temp&0xf0;
while( temp != 0xf0)
{
temp = P3;
switch(temp)
{
case 0xe7 : num = 169;
   break;
case 0xd7 : num = 196;
   break;
case 0xb7 : num = 225;
   break;
case 0x77 : num = 256;
   break;
   }

   while( temp != 0xf0)
{
temp = P3;
temp = temp&0xf0;
}

}
}
return num;
}

void we(uchar aa, uchar bb, uchar cc)
{
   Send_595(0xfe);
Send_595(t_display[aa]);
P_HC595_RCLK = 0;
P_HC595_RCLK = 1;


Send_595(0xfd);
Send_595(t_display[bb]);
P_HC595_RCLK = 0;
P_HC595_RCLK = 1;

Send_595(0xfb);
Send_595(t_display[cc]);
P_HC595_RCLK = 0;
P_HC595_RCLK = 1;
}