#include
# define uchar unsigned char
# define uint unsigned int
Uchar code KEY_TABLE []={xde 0 xee, 0, 0 xbe, 0 x7e, 0 xed, 0 XDD, 0 XBD, 0 x7d, 0 xeb, 0 XDB, 0 XBB, 0 x7b, 0 xe7, 0 xd7, 0 xb7, 0 x77};//button key value table
Uchar code TABLE []={x5b x3f 0, 0 x06, 0, 0, x4f x66 0, 0 x6d, 0 x7d, 0 x07, 0 x7f, 0 x6f, 0 x77, 0 x7c, 0 x39, 0 x5e, 0 x79, 0 x71};//total Yin
//-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Void delayl () {
Uint k, I, j;
For (k=1; K> 0; K -)
For (I=350; i> 0; I -)
For (j=2; J> 0; J -);
}//light digital tube delay
Void delay2 ()
{
Uint n=10000; While (n -);
}//removing jitter
//-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Void UART interrupt ()
4{
Uchar temp.
while(! RI);
RI=0;//remove interrupt flag
Temp=SBUF;
P0=0 x01; P1=TABLE [10] temp %;//display received data
Delay1 ();
P0=0 x02; P1=TABLE/temp/10];//display the data received delay1 ();
//light digital tube, display the key value
while(! TI);
TI=0;//remove interrupt flag
}
//-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Void main ()
{
Uchar temp, key, I, num;
TMOD=0 x20;//timer 1 as baud rate generator
SCON=0 x50;
TH1=0 XFD;//9600 baud rate
TL1=0 XFD;
TR1=1; EA=1;
ES=1;
While (1)
{
The P2=0 xf0;//behavior zero, as 1, read the column value if (P2!=0 xf0)//judge whether the keyboard is pressed {delay2 ();//damping the if (P2!=0 xf0)//if the if statement is still true, then can be determined with the keyboard is pressed {temp=P2;//store the column read in P2=0 x0f;//as zero, act 1, read the row value key=temp | P2. Comprehensive,//the row, column value is assigned to the key for (I=0; i<16. I++) if (key==KEY_TABLE [I])//read the key value table, determine the read button value {num=I; break; } SBUF=num; while(! TI); }}
}}
