/********************************** (C) COPYRIGHT *******************************
* File Name          : KEY.c
* Author             : WCH
* Version            : V1.0
* Date               : 2014/05/12
* Description        : 
*******************************************************************************/



/******************************************************************************/
/* 头文件包含 */
#include "CH57x_common.h"
#include "HAL.h"


/**************************************************************************************************
 *                                        GLOBAL VARIABLES
 **************************************************************************************************/

uint8 Hal_KeyIntEnable;           /* interrupt enable/disable flag */

// Registered keys task ID, initialized to NOT USED.
static uint8 registeredKeysTaskID = TASK_NO_TASK;
static uint8 halKeySavedKeys;     /* 保留按键最后的状态，用于查询是否有键值变化 */
static uint8 KeyConfigFlag;		    /* 按键是否配置标志位 */


/**************************************************************************************************
 *                                        FUNCTIONS - Local
 **************************************************************************************************/
static halKeyCBack_t pHalKeyProcessFunction;	    /* callback function */


/**************************************************************************************************
 * @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;
  /* Start with key is not configured */
  KeyConfigFlag = FALSE;
  KEY1_DIR;                    //IO方向（输出输出）
  KEY1_PU;                  //上拉
  HalKeyConfig( HAL_KEY_INTERRUPT_DISABLE, HalKeyCallback );
}

void HAL_KEY_RegisterForKeys( tmosTaskID id )
{
	registeredKeysTaskID = id;
}

/**************************************************************************************************
 * @fn      HalKeyConfig
 *
 * @brief   Configure the Key serivce
 *
 * @param   interruptEnable - TRUE/FALSE, enable/disable interrupt
 *          cback - pointer to the CallBack function
 *
 * @return  None
 **************************************************************************************************/
void HalKeyConfig (uint8 interruptEnable, halKeyCBack_t cback)
{
  /* Enable/Disable Interrupt or */
  Hal_KeyIntEnable = interruptEnable;
  /* Register the callback fucntion */
  pHalKeyProcessFunction = cback;
  /* Determine if interrupt is enable or not */
  if (Hal_KeyIntEnable){
    /* Do this only after the hal_key is configured - to work with sleep stuff */
    if (KeyConfigFlag == TRUE){
      tmos_stop_task( halTaskID, HAL_KEY_EVENT );  /* Cancel polling if active */
    }
  }
  else{    /* Interrupts NOT enabled */
    tmos_start_task( halTaskID, HAL_KEY_EVENT, HAL_KEY_POLLING_VALUE);    /* Kick off polling 开始轮训*/
  }
  /* Key now is configured */
  KeyConfigFlag = TRUE;
}

/*********************************************************************
 * @fn      OnBoard_SendKeys
 *
 * @brief   Send "Key Pressed" message to application.
 *					向应用程序发送“按键”消息。
 * @param   keys  - keys that were pressed
 *          state - shifted
 *
 * @return  status
 *********************************************************************/
uint8 OnBoard_SendKeys( uint8 keys, uint8 state )
{
  keyChange_t *msgPtr;

  if ( registeredKeysTaskID != TASK_NO_TASK ){
    // Send the address to the task
    msgPtr = (keyChange_t *)tmos_msg_allocate( sizeof(keyChange_t) );
    if ( msgPtr ){
      msgPtr->hdr.event = KEY_CHANGE;
      msgPtr->state = state;
      msgPtr->keys = keys;
      tmos_msg_send( registeredKeysTaskID, (uint8 *)msgPtr );
    }
    return ( SUCCESS );
  }
  else{
    return ( FAILURE );
  }
}

/*********************************************************************
 * @fn      OnBoard_KeyCallback
 *
 * @brief   Callback service for keys
 *
 * @param   keys  - keys that were pressed
 *          state - shifted
 *
 * @return  void
 *********************************************************************/
void HalKeyCallback ( uint8 keys, uint8 state )
{
  (void)state;
  if ( OnBoard_SendKeys( keys, state ) != SUCCESS ){
    // Process SW1 here
    if ( keys & HAL_KEY_SW_1 ){  // Switch 1
		}
    // Process SW2 here
    if ( keys & HAL_KEY_SW_2 ){  // Switch 2
    }
    // Process SW3 here
    if ( keys & HAL_KEY_SW_3 ){  // Switch 3
    }
    // Process SW4 here
    if ( keys & HAL_KEY_SW_4 ){  // Switch 4
    }
  }
}


/**************************************************************************************************
 * @fn      HalKeyRead
 *
 * @brief   Read the current value of a key
 *
 * @param   None
 *
 * @return  keys - current keys status
 **************************************************************************************************/
uint8 HalKeyRead ( void )
{
  uint8 keys = 0;

  if (HAL_PUSH_BUTTON1()){ //读按键1
    keys |= HAL_KEY_SW_1;
  }
  if (HAL_PUSH_BUTTON2()){ //读按键1
    keys |= HAL_KEY_SW_2;
  }
  if (HAL_PUSH_BUTTON3()){ //读按键1
    keys |= HAL_KEY_SW_3;
  }
  if (HAL_PUSH_BUTTON4()){ //读按键1
    keys |= HAL_KEY_SW_4;
  }
  return keys;
}


/**************************************************************************************************
 * @fn      HAL_KeyPoll
 *
 * @brief   Called by hal_driver to poll the keys
 *
 * @param   None
 *
 * @return  None
 **************************************************************************************************/
void HAL_KeyPoll (void)
{
  uint8 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_KeyIntEnable){	             /* 中断未使能 */
    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, HAL_KEY_STATE_NORMAL);
  }
}


/******************************** endfile @ key ******************************/