#define KEYSCAN_TICK 5 //50ms
#define KEY_PRESS_INTERVAL 4
#define KEY_SHORTUP_TICK 18 //900ms
#define KEY_LONGUP_TICK 30 //1000ms
#define DOWN_MASK_BIT 16
#define PRESS_MASK_BIT 17
#define SHORTUP_MASK_BIT 18
#define LONGUP_MASK_BIT 19
INT32U Key = 0;
INT32U preKeyValue = 0xffffffff;
INT32U keyTimer = 0;
void KeyScan(void)//Interrup Service Routin
{
INT32U keyValue;
Key = 0;
keyValue = GetKeyValue();
if(keyValue)
{
if(keyTimer == 0)
Key = keyValue + ((INT32U)1<<16);//down
else if(keyTimer >= KEY_SHORTUP_TICK )
{
if(keyTimer % KEY_PRESS_INTERVAL == 0)
{
Key = keyValue + ((INT32U)1<<17);//press
}
}
}
else
{
if(keyTimer > 0 && keyTimer < KEY_SHORTUP_TICK)
{
Key = preKeyValue + ((INT32U)1<<18);//short up
}
else if(keyTimer >= KEY_LONGUP_TICK)
{
Key = preKeyValue + ((INT32U)1<<19);//long up
}
keyTimer = 0;
}
if(keyValue == preKeyValue )
{
keyTimer++;
}
if(keyValue)
preKeyValue = keyValue;
}
第一个写按键扫描程序，欢迎大侠拍转，指出偶程序的bug！ |
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