t_keyscan.h

来自「schduler for AVR mcu」· C头文件 代码 · 共 41 行

/*
------------------------------------------------------------------*-

   T_KeyScan.H (v1.00)

  ------------------------------------------------------------------
   
   Key scan  program (Test Version 1.0)


   COPYRIGHT
   ---------

   This code is from the book:

   PATTERNS FOR TIME-TRIGGERED EMBEDDED SYSTEMS by Michael J. Pont 
   [Pearson Education, 2001; ISBN: 0-201-33138-1].

   This code is copyright (c) 2001 by Michael J. Pont.
 
   --- Modefied by  sylva zhu to apply for  AVR Microcontroller .
   --- Ver 1.0  Sept 25th , 2006 .

-*------------------------------------------------------------------
*/
#ifndef  __T_KEYSCAN_H
#define  __T_KEYSCAN_H
//
#define  KEY_UP                1
#define  KEY_DOWN              2
#define  KEY_MODE              3
#define  NO_KEY_PRESSED       0xff
//
extern volatile unsigned char FKeyunProcessed;
extern volatile unsigned char KeyValue;
//
// Global function 
void KEY_SCAN_Update(void);
//
#endif