記錄一下按鍵檢測的快速算法

typedef struct {uint16_t u16Value;//key valueuint16_t u16Trg;//triger uint16_t u16Cont;//continuebool boolPressed;uint16_t u16Release;//releasebool boolReleased; }KEY_INFO;

u16Trg : 表示按鍵按下的狀態
u16Release ：表示釋放的狀態
u16Cont ：按鍵值

1.檢測

//1.get key is pressed value. u16Value = u16Value & DE_KEY_ALL; //2.triger pressed g_KeyInfo.u16Trg = u16Value & (u16Value ^ g_KeyInfo.u16Cont); //3.triger released g_KeyInfo.u16Release = u16Value ^ g_KeyInfo.u16Trg ^ g_KeyInfo.u16Cont; //4.the key countinue press g_KeyInfo.u16Cont = u16Value;

2.處理

static void Key_Process(void) {//get the key releasedif(g_KeyInfo.u16Release){g_KeyInfo.u16Value |= g_KeyInfo.u16Release;}//key pressedif(g_KeyInfo.u16Cont){g_KeyInfo.boolPressed = TRUE;}//key releasedif((!g_KeyInfo.u16Cont)&&(g_KeyInfo.boolPressed)){g_KeyInfo.boolPressed = FALSE;g_KeyInfo.boolReleased = TRUE;} }

傳值

if(g_KeyInfo.boolReleased)
{
return g_KeyInfo.u16Value;
}

總結

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