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| #include <reg51.h>
#include <stdio.h>
unsigned char code table1[]={
0x80,0x80,0x80,0x80,0x80,0x80, // SPACE
0x80,0x80,0x5F,0x80,0x80,0x80, // !
0x04,0x02,0x05,0x02,0x01,0x80, // "
0x14,0x7F,0x14,0x7F,0x14,0x80, // #
0x26,0x49,0x7F,0x49,0x32,0x80,// $
0x22,0x10,0x08,0x04,0x22,0x80,// %
0x80,0x36,0x49,0x36,0x28,0x80,// &
0x04,0x02,0x01,0x80,0x80,0x80,// '
0x08,0x14,0x22,0x41,0x80,0x80,// (
0x80,0x41,0x22,0x14,0x08,0x80,// )
0x2A,0x1C,0x08,0x1C,0x2A,0x80,// *
0x08,0x08,0x3E,0x08,0x08,0x80,// +
0x80,0x58,0x38,0x80,0x80,0x80,// ,
0x08,0x08,0x08,0x08,0x08,0x80,// -
0x40,0x80,0x80,0x80,0x80,0x80,// .
0x20,0x10,0x08,0x04,0x02,0x80}; // ;
unsigned char code table2[]={
0x3E,0x41,0x41,0x41,0x3E,0x80,// 0
0x80,0x42,0x0FF,0x40,0x80,0x80,// 1
0x42,0x61,0x51,0x49,0x46,0x80,// 2
0x49,0x49,0x49,0x49,0x36,0x80,// 3
0x07,0x08,0x08,0x08,0x77,0x80,// 4
0x4F,0x49,0x49,0x49,0x39,0x80,// 5
0x3E,0x49,0x49,0x49,0x32,0x80,// 6
0x41,0x21,0x11,0x09,0x07,0x80,// 7
0x3E,0x49,0x49,0x49,0x3E,0x80,// 8
0x06,0x09,0x09,0x09,0x7E,0x80,// 9
0x80,0x80,0x22,0x80,0x80,0x80,// :
0x80,0x40,0x32,0x80,0x80,0x80,// ;
0x08,0x14,0x22,0x41,0x80,0x80,// <
0x14,0x14,0x14,0x14,0x14,0x80,// =
0x80,0x41,0x22,0x14,0x08,0x80,// >
0x06,0x01,0x51,0x09,0x06,0x80}; // ?
unsigned char code table3[]={
0x3E,0x4D,0x53,0x1D,0x1E,0x80,// @
0x7C,0x12,0x11,0x12,0x7C,0x80,// A
0x7F,0x49,0x49,0x49,0x36,0x80,// B
0x3E,0x41,0x41,0x41,0x22,0x80,// C
0x7F,0x41,0x41,0x22,0x1C,0x80,// D
0x7F,0x49,0x49,0x49,0x41,0x80,// E
0x7F,0x09,0x09,0x09,0x01,0x80,// F
0x3E,0x41,0x49,0x49,0x7A,0x80,// G
0x7F,0x08,0x08,0x08,0x7F,0x80,// H
0x80,0x41,0x7F,0x41,0x80,0x80,// I
0x20,0x40,0x41,0x3F,0x01,0x80,// J
0x7F,0x08,0x14,0x22,0x41,0x80,// K
0x7F,0x40,0x40,0x40,0x40,0x80,// L
0x7F,0x02,0x0C,0x02,0x7F,0x80,// M
0x7F,0x04,0x08,0x10,0x7F,0x80,// N
0x3E,0x41,0x41,0x41,0x3E,0x80};// O
unsigned char code table4[]={
0x7F,0x09,0x09,0x09,0x06,0x80,// P
0x3E,0x41,0x51,0x21,0x5E,0x80,// Q
0x7F,0x09,0x19,0x29,0x46,0x80,// R
0x46,0x49,0x49,0x49,0x31,0x80,// S
0x01,0x01,0x7F,0x01,0x01,0x80,// T
0x3F,0x40,0x40,0x40,0x3F,0x80,// U
0x1F,0x20,0x40,0x20,0x1F,0x80,// V
0x3F,0x40,0x30,0x40,0x3F,0x80,// W
0x63,0x14,0x08,0x14,0x63,0x80,// X
0x07,0x08,0x70,0x08,0x07,0x80,// Y
0x61,0x51,0x49,0x45,0x43,0x80,// Z
0x7F,0x41,0x41,0x41,0x80,0x80,// [
0x02,0x04,0x08,0x10,0x40,0x80,// ""
0x80,0x41,0x41,0x41,0x7F,0x80,// ]
0x04,0x02,0x01,0x02,0x04,0x80,// ^
0x40,0x40,0x40,0x40,0x40,0x80}; // _
unsigned char * table (unsigned char);
void displaycolumn(void);
unsigned char count=0,j=0,a=0;
unsigned char decoder=0;
unsigned char *c,*d;
unsigned char idata msg[]={"Hello world"};
void main(void)
{
TMOD = (TMOD & 0x0F) | 0x32;
TH0=0x00;
TR0=1;
// Write your code here
do{a++;
count++;
}while(msg[a]!=0);
a=0;
while(1); }
unsigned char *table (unsigned char x)
{
if(x==2)
return table1;
else if(x==3)
return table2;
else if(x==4)
return table3;
else if(x==5)
return table4;
else
return 0;
}
void timer0_ISR (void) interrupt 1
{
if(decoder<12) decoder++;
else decoder=0x00;
P2=0xFF & decoder;
if((msg[a]!=0)&&(a<count))
{
c=table((msg[a]&0xf0)>>4);
d=c+(6*(msg[a]&0x0f));
displaycolumn();
}}
void displaycolumn(void)
{
P0= *d++;
j++;
if(j==6) {
a++;
j=0;
}} |