Independent button controls the displacement of the digital tube-EEWORLD

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Independent button controls the displacement of the digital tube

Code:

#include

#define uchar unsigned char

#define uint unsigned int

uchar code DSY_CODE[]=

{

0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff

};

uchar code DSY_Index[]=

{

0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01

};

uchar Display_Buffer[]=

{

0,10,10,10,10,10,10,10

};

void DelayMS(uint x)

{

flying t;

while(x--)

{

for(t=0;t<120;t++);

}

void Show_Count_ON_DSY()

{

flying i;

for(i=0;i<8;i++)

{

P2 = DSY_Index[i];

P0 = DSY_CODE[Display_Buffer[i]];

DelayMS(2);

}

void main()

{

flying i;

uchar Key_NO,Key_Counts=0;

P0 = 0xff;

P1 = 0xff;

P2 = 0x00;

while(1)

{

Show_Count_ON_DSY();

P1 = 0xff;

Key_NO = P1;

switch(Key_NO)

{

case 0xfe: Key_Counts++;

if(Key_Counts>8)

Key_Counts = 8;

Display_Buffer[Key_Counts-1] = Key_Counts;

break;

case 0xfd: if(Key_Counts>0)

Display_Buffer[--Key_Counts] = 10;

if(Key_Counts==0)

Display_Buffer[0] = 0;

break;

case 0xfb: Display_Buffer[0]=0;

for(i=1;i<8;i++)

Display_Buffer[i] = 10;

Key_Counts = 0;

}

while(P1 != 0xff)

Show_Count_ON_DSY();

}

Hardware Hookup

Reference address：Independent button controls the displacement of the digital tube

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