key.c

来自「通讯电缆智能防盗报警器--通讯电缆智能防盗报警器安装在各局的机房内」· C语言 代码 · 共 40 行

#define KEY_GLOBALS


#include <includes.h>




INT8U KeyRd(void)                     //键盘译码程序
{
	INT8U KeyTemp;
	if(KeyWrPoint!=KeyRdPoint)          //缓冲环中有按键
    {
    	switch(KeyBuf[KeyRdPoint])
    	{
    		case KEY_1:
    		     KeyTemp=KEY_CANCEL;
    		     break;
    		case KEY_2:
    		     KeyTemp=KEY_ADD;
    		     break;
    		case KEY_3:
    		     KeyTemp=KEY_SUB;
    		     break;
    		case KEY_4:
    		     KeyTemp=KEY_ENTER;
    		     break;
    		case KEY_14:
    		     KeyTemp=KEY_OTHERS;
    		     break;
    		default :
    			   KeyTemp=KEY_NONE;
    			   break;
    	}
    	KeyRdPoint++;
    	KeyRdPoint%=10;
    }
    else KeyTemp=KEY_NONE;
    return(KeyTemp);
}