key.c

一个非常好的微处理器烧录EEPROM的C++ 原代码项目文件,直接可用,而且还是一拖八的, 成果奉献

#include	"PublicDef.h"
#include	"PublicFunction.h"
BYTE	KeyData;
struct
	{
		WORD     Delay;
		BYTE	WaitTime;
		BYTE	Stau;
		BYTE	ScanFlag;
		BYTE	ChekFlag;
		BYTE	OldKey;
	}	Keys;


BYTE	Key_Func;
BYTE	KeyUpContinue=0,KeyDownContinue=0,KeyLeftContinue=0,KeyRightContinue=0;

void	ScanKey(void)
{
	static	BYTE	scan_delay=0;
	if	(Pin_KEY_START)
	{
		scan_delay=0;
		Keys.ScanFlag=SCAN_NO;
		return;
	}
	if	(scan_delay==0)
	{
		scan_delay=1;
		Keys.ScanFlag=SCAN_DELAY;
		return;
	}
	Keys.ScanFlag=SCAN_NO;
	scan_delay=0;
	Keys.ScanFlag=SCAN_YES;
	KeyData=KEY_SCAN_START;
}

void	GetKey(void)
{
	if	(Keys.ScanFlag==SCAN_NO)
	{
		Keys.Delay=0;
		Keys.Stau=bKEY_RELEASE;
		return ;
	}
	if (KeyData!=Keys.OldKey)
	{
		Keys.OldKey=KeyData;
		Keys.Delay=800;
		Keys.Stau=bKEY_PRESS;
		Keys.ChekFlag=1;
	}
	else if (!Keys.Delay)
	{
		if ((Keys.Stau==bKEY_PRESS)||(Keys.Stau==bKEY_REPEAT))
		{
			Keys.Delay=50;
			Keys.Stau=bKEY_CONTINU;
		}	
		else 
		{	
			if (Keys.Stau==bKEY_CONTINU)
			Keys.Delay=50;
			else
			{
				Keys.Delay=800;	
				Keys.Stau=bKEY_REPEAT;
			}	
		}
		Keys.ChekFlag=1;
	}
	Keys.ScanFlag=0;
}

void	KeyScanToFunc(void)
{
	if	(Keys.Stau==bKEY_CONTINU)
	Key_Func=KEY_NO_KEY;
	else
	{
		switch (KeyData)
		{
			case	KEY_SCAN_START:
					Key_Func=KEY_START;
					break;
			default: 	Key_Func=KEY_NO_KEY;
					break;
		}
	}	
}

void	Chek_key(void)
{
	if (Keys.ChekFlag)
	{
		KeyScanToFunc();	
		Keys.ChekFlag=0;
	}
}