Dot matrix scrolling subtitle program-EEWORLD

MCU digital tube anode connection method, P0 port segment selection, P2 port position selection

*********************************/

#include //51 chip pin definition header file
#include //Internally includes delay function _nop_();

#define uchar unsigned char
#define uint unsigned int

uchar display[ ]={0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,

0xBF,0xBF,0x89,0x86,0xC7,0xC7,0xC0,0xBF,0xBF,

//--HELLO-

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff};

uchar shift,j=0;

void delayms(uint ms)

{

uchar t;

while(ms--)

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

void disp(void)

{
uchar i;
shift=0x7f;

for(i=8; i>0; i--)

{ P2=0xff;
P0=display[i+j];
P2=shift;
shift=(shift>>1)|0x80;
delayms(1);

}

void main()
{
uchar k;

P0=0xFF;
P2=0xFF;

while(1)

{
for(j=0;j<17;j++)
{

for(k=0;k<125;k++)
disp();
}
}
}

Reference address：Dot matrix scrolling subtitle program

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