key.c

来自「基于MB95F168气体检漏仪软件代码」· C语言 代码 · 共 55 行

#include "mb95100.h"
#include "title.h"
unsigned char key,keybuf;

_GETKEY()
{unsigned long delay;
	for(delay = 0; delay < 20; delay++)
        asm("\tNOP");
   	key=PDR0;
	key=key&0x78;
	switch(key)
	{
	case 0x70: 
	keybuf=1;	break;
	case 0x68: 
	keybuf=0;	break;
	case 0x58: 
	keybuf=3;	break;
	case 0x38: 
	keybuf=2;	break;
	default:
	keybuf=0x09; break;
	}
//_LEDDISPLAY(keybuf);
}
_Judgekey()
{
unsigned char x;
key=PDR0;
key=key&0x78;
if(key==0x78) 
{keybuf=0x09;
}
else 
{
_GETKEY();
key=PDR0;
key=key&0x78;
for(x=0;x<20;x++)
{
__wait_nop();
}
while(key!=0x78)
{
for(x=0;x<20;x++)
{
__wait_nop();
}
key=PDR0;
key=key&0x78;
}
}
return keybuf;
}