-
-
手机阅读
/*###############################################################################
**文件:ScanKey.c
**说明:面板按键扫描程序.
**###############################################################################
*/
#include "Global.h"
#ifdef Use_Key_UpAndDown_Active
bit b_Key_ActiveAtDown;
bit b_Key_ActiveAtDownOK;
//unsigned char idata g_Key_CounterAtDown;
unsigned char g_Key_CounterAtDown;
#endif //Use_Key_UpAndDown_Active
#ifdef Use_Front_Keyboard /*面板按键扫描程序.*/
#define C_Key_RepeatTimer_Start (0x20)
#define C_Key_RepeatTimer_Repeating (0x03)
#define C_Keyboard_Range_MIN (0x41) /*65*/
#define C_PopUpKey_ActiveTime (0x10)
unsigned char g_NewKey;
unsigned char g_NewKeyBak;
bit b_KeyStatus;
unsigned char g_KeyRepeatTimer;
bit b_KeyPressFirstTime;
#ifdef Use_Keyboard_IO
sbit Pin_Key_1=CPU_Pin_16;
//sbit Pin_Key_2=CPU_Pin_15;
//sbit Pin_Key_3=CPU_Pin_34;
//sbit Pin_Key_4=CPU_Pin_35;
#endif //Use_Keyboard_IO
/********************************************************************************
**函数:
**功能:
**参数:
**返回:
**备注:
*********************************************************************************
*/
bit GetKey(void)
{
#ifdef Use_Keyboard_IO /*IO口驱动的面板按键驱动实体.<========经常改动.*/
//unsigned char i;
Pin_Key_1=HIGH;
if (Pin_Key_1==LOW)
{
g_NewKey=0;
goto Code_GetKey_HaveKey;
}
Pin_Key_1=LOW;
b_KeyStatus=C_KeyStatus_Pop_Up;
return (FALSE);
Code_GetKey_HaveKey:
b_KeyStatus=C_KeyStatus_Press_Down;
return (TRUE);
#endif //Use_Keyboard_IO
return (FALSE);
}//GetKey()------------------------------end.
#endif //Use_Front_Keyboard
#ifdef Use_Sys_UI
void ScanKey(void)
{
//unsigned char idata i;
unsigned char i;
#ifdef Use_Key_UpAndDown_Active /*a local variable.*/
//unsigned char idata j;
unsigned char j;
#endif //Use_Key_UpAndDown_Active
if (b_KeyStatus==C_KeyStatus_Pop_Up)
{
/*按一下的键.*/
if (GetKey())
{
if (b_KeyPressFirstTime)
{
/*再次检测到按下的键,此时确认按键有效.*/
b_KeyPressFirstTime=FALSE;
if (g_NewKey==g_NewKeyBak)
{
g_KeyRepeatTimer=C_Key_RepeatTimer_Start;
g_SystemKeyCode=C_Keyboard_Range_MIN+g_NewKey;
b_SystemRepeatKeyOK=FALSE;
b_SystemKeyOK=TRUE;
b_Key_ComeFrom=C_Key_ComeFrom_Keyboard;
}
}//if (b_KeyPressFirstTime)-------------------
else
{
/*第一次检测到按下的键.*/
b_KeyPressFirstTime=TRUE;
b_KeyStatus=C_KeyStatus_Pop_Up;
g_NewKeyBak=g_NewKey;
g_NewKey=C_NewKey_NULL;
}//if (b_KeyPressFirstTime)-------else---------
}//if (GetKey())---------------
}//if (b_KeyStatus==C_KeyStatus_Pop_Up)--------
else
{
/*连发和长按的键.*/
if (GetKey())
{
//=====================================================================
//repeat keys checking.
//=====================================================================
for (i=0;i<C_Key_RepeatKey_Number;i++)
{
if (Tab_KeyBoardRepeatKey[i]==g_SystemKeyCode)
{
g_KeyRepeatTimer--;
if (g_KeyRepeatTimer==0x00)
{
g_KeyRepeatTimer=C_Key_RepeatTimer_Repeating;
b_SystemKeyOK=TRUE;
b_Key_ComeFrom=C_Key_ComeFrom_Keyboard;
b_SystemRepeatKeyOK=TRUE;
}
}//if (Tab_KeyBoardRepeatKey[i]==g_SystemKeyCode)-------
}//for (i=0;i<C_Key_RepeatKey_Number;i++)------
}//if (GetKey())---------
g_NewKey=C_NewKey_NULL;
g_NewKeyBak=C_NewKey_NULL;
}//if (b_KeyStatus==C_KeyStatus_Pop_Up)-------else-------------
return;
}//ScanKey()------------------------------------------------------end.
#endif //Use_Sys_UI