key.c

Keil平台

#include "config.h"

int KeyHit = 0;
int KeyState = 0;
int OldKeyState = 0;

int getch(void)
{
    int KeyCode;
    if((KeyHit)!=0)
    {
        switch(KeyHit)
        {
           case ~0x10:    KeyCode = KEY_HELP; break;
           case ~0x00:    KeyCode = KEY_UP;   break;
           case ~0x11:    KeyCode = KEY_ESC;  break;
           case ~0x08:    KeyCode = KEY_LEFT; break;
           case ~0x12:    KeyCode = KEY_OK;   break;
           case ~0x0C:    KeyCode = KEY_RIGHT;    break;
           case ~0x04:    KeyCode = KEY_DOWN; break;
           case ~0x13:    KeyCode = KEY_COM; break;
           case 0x0042:    KeyCode = KEY_DATA;  break;
            default:       break;
        }
        KeyHit = 0;
        return KeyCode;
    }
}
/****************************************************************************/
int kbhit(void)
{
    return KeyHit;
}
/****************************************************************************/
void ScanKey(void)
{
    uint16 State1,State2;
    do
    {
		State1 = ((FIO1PIN3>>1) & 0x1F);
        OSTimeDlyHMSM(0,0,0,10);
    }while(State1!=0x1F);
    do
    {
		State1 = ((FIO1PIN3>>1) & 0x1F);
        OSTimeDlyHMSM(0,0,0,10);
		State2 = ((FIO1PIN3>>1) & 0x1F);
        OSTimeDlyHMSM(0,0,0,10);
    }while(State1!=State2 || State1==0x1F);
	KeyState = ~State1;
	
    //if ((OldKeyState != KeyState ) && (KeyHit == 0))
    if (KeyHit == 0)
    {
        OldKeyState = KeyState;
        KeyHit = KeyState;
    }
}