File size: 1,014 Bytes
9f43458 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 | #include "bsp_key.h"
unsigned char Key_Read()
{
unsigned int key_new;
unsigned char Key_Vaule;
P44=0;P42=1;P35=1;P34=1;
key_new=P3&0X0F;
P42=0;P44=1;P35=1;P34=1;
key_new=(key_new<<4)|(P3&0X0F);
P35=0;P42=1;P44=1;P34=1;
key_new=(key_new<<4)|(P3&0X0F);
P34=0;P42=1;P35=1;P44=1;
key_new=(key_new<<4)|(P3&0X0F);
switch(~key_new)
{
case 0x8000:Key_Vaule=4;break;
case 0x4000:Key_Vaule=5;break;
case 0x2000:Key_Vaule=6;break;
case 0x1000:Key_Vaule=7;break;
case 0x0800:Key_Vaule=8;break;
case 0x0400:Key_Vaule=9;break;
case 0x0200:Key_Vaule=10;break;
case 0x0100:Key_Vaule=11;break;
case 0x0080:Key_Vaule=12;break;
case 0x0040:Key_Vaule=13;break;
case 0x0020:Key_Vaule=14;break;
case 0x0010:Key_Vaule=15;break;
case 0x0008:Key_Vaule=16;break;
case 0x0004:Key_Vaule=17;break;
case 0x0002:Key_Vaule=18;break;
case 0x0001:Key_Vaule=19;break;
default : Key_Vaule=0;
}
return Key_Vaule;
}
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