目錄

TMOS系統中自帶有按鍵檢測輪詢功能，預設100ms檢測一次，在debug時很有幫助。不過在需要低功耗休眠的前提下，檢測按鍵需要頻繁喚醒，影響功耗，故多數BLE的工程都沒有用到這個功能。程式碼貼在了最後。

啟用按鍵查詢，先要在工程配置中新增HAL_KEY，以及確保KEY.c新增進編譯。

然後新增按鍵處理函式，函式名自擬，但是形參須為（uint8_t keys），呼叫HalKeyConfig函式註冊一下。

這樣預設程式碼中配置好了PB22和PB4兩個按鍵，如上圖新增，評估板上用PB4作為按鍵，就已經可以跑起來。如果需要更多按鍵，可以如下圖新增處理，下圖中新增到了總計5個按鍵，可以新增B組引腳，也可以新增A組引腳。

在KEY.c中需要做如下修改。

 在KEY.h中需要做如下修改。

列印如下，支援同時檢測多個按鍵按下。

/*KEY.c中的修改後程式碼*/

/**************************************************************************************************
 * @fn      HAL_KeyInit
 *
 * @brief   Initilize Key Service
 *
 * @param   none
 *
 * @return  None
 *************************************************************************************************
 
*/
void HAL_KeyInit(void)
{
    /* Initialize previous key to 0 */
    halKeySavedKeys = 0;
    /* Initialize callback function */
    pHalKeyProcessFunction = NULL;
    KEY1_DIR;
    KEY1_PU;
    KEY2_DIR;
    KEY2_PU;
    KEY3_DIR;       //JW
    KEY3_PU;
    KEY4_DIR;       //JW
    KEY4_PU;
    KEY5_DIR;       
 
//JW
    KEY5_PU;
}

/**************************************************************************************************
 * @fn      HalKeyConfig
 *
 * @brief   Configure the Key serivce
 *
 * @param   cback - pointer to the CallBack function
 *
 * @return  None
 **************************************************************************************************/
void HalKeyConfig(halKeyCBack_t cback)
{
    /* Register the callback fucntion */
    pHalKeyProcessFunction = cback;
    tmos_start_task(halTaskID, HAL_KEY_EVENT, HAL_KEY_POLLING_VALUE); /* Kick off polling */
}

/**************************************************************************************************
 * @fn      HalKeyRead
 *
 * @brief   Read the current value of a key
 *
 * @param   None
 *
 * @return  keys - current keys status
 **************************************************************************************************/
uint8_t HalKeyRead(void)
{
    uint8_t keys = 0;

    if(HAL_PUSH_BUTTON1())
    { //讀按鍵1
        keys |= HAL_KEY_SW_1;
    }
    if(HAL_PUSH_BUTTON2())
    { //讀按鍵2
        keys |= HAL_KEY_SW_2;
    }
    if(HAL_PUSH_BUTTON3())
    { //讀按鍵3
        keys |= HAL_KEY_SW_3;
    }
    if(HAL_PUSH_BUTTON4())
    { //讀按鍵4
        keys |= HAL_KEY_SW_4;
    }
    if(HAL_PUSH_BUTTON5())          //JW
    { //讀按鍵5
        keys |= HAL_KEY_SW_5;
    }
    return keys;
}

/**************************************************************************************************
 * @fn      HAL_KeyPoll
 *
 * @brief   Called by hal_driver to poll the keys
 *
 * @param   None
 *
 * @return  None
 **************************************************************************************************/
void HAL_KeyPoll(void)
{
    uint8_t keys = 0;
    if(HAL_PUSH_BUTTON1())
    {
        keys |= HAL_KEY_SW_1;
    }
    if(HAL_PUSH_BUTTON2())
    {
        keys |= HAL_KEY_SW_2;
    }
    if(HAL_PUSH_BUTTON3())
    {
        keys |= HAL_KEY_SW_3;
    }
    if(HAL_PUSH_BUTTON4())
    {
        keys |= HAL_KEY_SW_4;
    }
    if(HAL_PUSH_BUTTON5())          //JW
    {
        keys |= HAL_KEY_SW_5;
    }
    if(keys == halKeySavedKeys)
    { /* Exit - since no keys have changed */
        return;
    }
    halKeySavedKeys = keys; /* Store the current keys for comparation next time */
    /* Invoke Callback if new keys were depressed */
    if(keys && (pHalKeyProcessFunction))
    {
        (pHalKeyProcessFunction)(keys);
    }
}

/*KEY.h中的修改後程式碼*/

/**************************************************************************************************
 *                                              MACROS
 **************************************************************************************************/
#define HAL_KEY_POLLING_VALUE    100

/* Switches (keys) */
#define HAL_KEY_SW_1             0x01  // key1
#define HAL_KEY_SW_2             0x02  // key2
#define HAL_KEY_SW_3             0x04  // key3
#define HAL_KEY_SW_4             0x08  // key4
#define HAL_KEY_SW_5             0x10  // key5      //JW

/* 按鍵定義 */

/* 1 - KEY */
#define KEY1_BV                  BV(22)
#define KEY2_BV                  BV(4)
#define KEY3_BV                  BV(8)      //JW
#define KEY4_AV                  (1 << 10)      //JW
#define KEY5_AV                  (1 << 15)      //JW

#define KEY1_PU                  (R32_PB_PU |= KEY1_BV)
#define KEY2_PU                  (R32_PB_PU |= KEY2_BV)
#define KEY3_PU                  (R32_PB_PU |= KEY3_BV)     //JW
#define KEY4_PU                  (R32_PA_PU |= KEY4_AV)     //JW
#define KEY5_PU                  (R32_PA_PU |= KEY5_AV)     //JW

#define KEY1_DIR                 (R32_PB_DIR &= ~KEY1_BV)
#define KEY2_DIR                 (R32_PB_DIR &= ~KEY2_BV)
#define KEY3_DIR                 (R32_PB_DIR &= ~KEY3_BV)       //JW
#define KEY4_DIR                 (R32_PA_DIR &= ~KEY4_AV)       //JW
#define KEY5_DIR                 (R32_PA_DIR &= ~KEY5_AV)       //JW

#define KEY1_IN                  (ACTIVE_LOW(R32_PB_PIN & KEY1_BV))
#define KEY2_IN                  (ACTIVE_LOW(R32_PB_PIN & KEY2_BV))
#define KEY3_IN                  (ACTIVE_LOW(R32_PB_PIN & KEY3_BV))     //JW
#define KEY4_IN                  (ACTIVE_LOW(R32_PA_PIN & KEY4_AV))     //JW
#define KEY5_IN                  (ACTIVE_LOW(R32_PA_PIN & KEY5_AV))     //JW

#define HAL_PUSH_BUTTON1()       (KEY1_IN) //新增自定義按鍵
#define HAL_PUSH_BUTTON2()       (KEY2_IN)
#define HAL_PUSH_BUTTON3()       (KEY3_IN)      //JW
#define HAL_PUSH_BUTTON4()       (KEY4_IN)      //JW
#define HAL_PUSH_BUTTON5()       (KEY5_IN)      //JW