?? key_driver.c
字號:
/******************************************************************************/
/* KEY_driver.c */
/* */
/* This is proprietary information, not to be published -- DIGIPRO DATA */
/* Copyright (C) 2002, DigiPro Information Co.,Ltd. All Rights Reserved. */
/* */
/* Author: Wu DingMing */
/* Date: August 12, 2002 */
/******************************************************************************/
#include "HDdrv.h"
#include "key.h"
unsigned int Get_Key(void)
{
static unsigned int key_list[21] = { 0x0000,
0x0101,0x0102,0x0104,0x0108,
0x0110,0x0201,0x0202,0x0204,
0x0208,0x0210,0x0401,0x0402,
0x0404,0x0408,0x0410,0x0801,
0x0802,0x0804,0x0808,0x0810};
unsigned int key,outkey,i;
for(outkey = 01; outkey < 0x10; outkey = outkey<<1)
{
WRITE_KEY = ~outkey;
key = ~READ_KEY;
if(key)
{
key += outkey<<8 ;
break;
}
}
for(i=0;i<21;i++)
{
if(key == key_list[i])
{
break;
}
}
return(i);
}
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