mapp.c

freescale的基于802.15.4的无线通讯例程

    pScanReq->scanChannels[3] = (uint8_t)((mDefaultValueOfChannel_c>>24) & 0xFF);
    /* Duration per channel 0-14 (dc). T[sec] = (16*960*((2^dc)+1))/1000000.
       A scan duration of 3 on 16 channels approximately takes 2 secs. */
    pScanReq->scanDuration = 3;
    
    /* Send the Scan request to the MLME. */
    if(MSG_Send(NWK_MLME, pMsg) == gSuccess_c)
    {
      UartUtil_Print("Done\n");
      return errorNoError;
    }
    else
    {
      UartUtil_Print("Invalid parameter!\n");
      return errorInvalidParameter;
    }
  }
  else
  {
    /* Allocation of a message buffer failed. */
    UartUtil_Print("Message allocation failed!\n");
    return errorAllocFailed;
  }
}


/******************************************************************************
* The App_HandleScanEdConfirm(nwkMessage_t *pMsg) function will handle the
* ED scan confirm message received from the MLME when the ED scan has completed.
* The message contains the ED scan result list. This function will search the
* list in order to select the logical channel with the least energy. The
* selected channel is stored in the global variable called 'mLogicalChannel'.
*
******************************************************************************/
static void App_HandleScanEdConfirm(nwkMessage_t *pMsg)
{  
  uint8_t n, minEnergy;
  uint8_t *pEdList;
  uint8_t ChannelMask;

  UartUtil_Print("Recevied the MLME-Scan Confirm message from the MAC\n");
    
  /* Get a pointer to the energy detect results */
  pEdList = pMsg->msgData.scanCnf.resList.pEnergyDetectList;
  
  /* Set the minimum energy to a large value */
  minEnergy = 0xFF;

  /* Select default channel */
  mLogicalChannel = 11;
 
  /* Search for the channel with least energy */
  for(n=0; n<16; n++)
  {
    ChannelMask = n + 11;
	if((pEdList[n] < minEnergy)&&((uint8_t)((mDefaultValueOfChannel_c>>ChannelMask) & 0x1)))
    {
      minEnergy = pEdList[n];
      /* Channel numbering is 11 to 26 both inclusive */
      mLogicalChannel = n + 11; 
    }
  }
  
  /* Print out the result of the ED scan */
  UartUtil_Print("ED scan returned the following results:\n  [");
  UartUtil_PrintHex(pEdList, 16, gPrtHexBigEndian_c | gPrtHexCommas_c);
  UartUtil_Print("]\n\n");
  
  /* Print out the selected logical channel */
  UartUtil_Print("Based on the ED scan the logical channel 0x");
  UartUtil_PrintHex(&mLogicalChannel, 1, 0);
  UartUtil_Print(" was selected\n");
  
  /*print a message on the LCD also*/
  LCD_ClearDisplay();
  LCD_WriteString(1,"Energy Detection");
  LCD_WriteString(2,"Scan..successful");  
  
  /* The list of detected energies must be freed. */
  MSG_Free(pEdList);
}

/******************************************************************************
* The App_StartScan(scanType) function will start the scan process of the
* specified type in the MAC. This is accomplished by allocating a MAC message,
* which is then assigned the desired scan parameters and sent to the MLME
* service access point. The MAC PIB attributes "macShortAddress", and 
* "macAssociatePermit" are modified.
*
* The function may return either of the following values:
*   errorNoError:          The Scan message was sent successfully.
*   errorInvalidParameter: The MLME service access point rejected the
*                          message due to an invalid parameter.
*   errorAllocFailed:      A message buffer could not be allocated.
*
******************************************************************************/
static uint8_t App_StartCoordinator(void)
{
  /* Message for the MLME will be allocated and attached to this pointer */
  mlmeMessage_t *pMsg;

  UartUtil_Print("Sending the MLME-Start Request message to the MAC...");
  
  /* Allocate a message for the MLME (We should check for NULL). */
  pMsg = MSG_AllocType(mlmeMessage_t);
  if(pMsg != NULL)
  {
    /* Pointer which is used for easy access inside the allocated message */
    mlmeStartReq_t *pStartReq;
    /* Return value from MSG_send - used for avoiding compiler warnings */
    uint8_t ret;
    /* Boolean value that will be written to the MAC PIB */
    uint8_t boolFlag;
    
    /* Set-up MAC PIB attributes. Please note that Set, Get,
       and Reset messages are not freed by the MLME. */
    
    /* We must always set the short address to something
       else than 0xFFFF before starting a PAN. */
    pMsg->msgType = gMlmeSetReq_c;
    pMsg->msgData.setReq.pibAttribute = gMPibShortAddress_c;
    pMsg->msgData.setReq.pibAttributeValue = (uint8_t *)maShortAddress;
    ret = MSG_Send(NWK_MLME, pMsg);
    
    /* We must set the Association Permit flag to TRUE 
       in order to allow devices to associate to us. */
    pMsg->msgType = gMlmeSetReq_c;
    pMsg->msgData.setReq.pibAttribute = gMPibAssociationPermit_c;
    boolFlag = TRUE;
    pMsg->msgData.setReq.pibAttributeValue = &boolFlag;
    ret = MSG_Send(NWK_MLME, pMsg);
    
    /* This is a MLME-START.req command */
    pMsg->msgType = gMlmeStartReq_c;
    
    /* Create the Start request message data. */
    pStartReq = &pMsg->msgData.startReq;
    /* PAN ID - LSB, MSB. The example shows a PAN ID of 0xBEEF. */
    FLib_MemCpy(pStartReq->panId, (void *)maPanId, 2);
    /* Logical Channel - the default of 11 will be overridden */
    pStartReq->logicalChannel = mLogicalChannel;
    /* Beacon Order - 0xF = turn off beacons */
    pStartReq->beaconOrder = 0x0F;  
    /* Superframe Order - 0xF = turn off beacons */
    pStartReq->superFrameOrder = 0x0F;
    /* Be a PAN coordinator */
    pStartReq->panCoordinator = TRUE;
    /* Dont use battery life extension */
    pStartReq->batteryLifeExt = FALSE;
    /* This is not a Realignment command */
    pStartReq->coordRealignment = FALSE;
    /* Dont use security */
    pStartReq->securityEnable = FALSE;
      
    /* Send the Start request to the MLME. */
    if(MSG_Send(NWK_MLME, pMsg) == gSuccess_c)
    {
      UartUtil_Print("Done\n");
      return errorNoError;
    }
    else
    {
      /* One or more parameters in the Start Request message were invalid. */
      UartUtil_Print("Invalid parameter!\n");
      return errorInvalidParameter;
    }
  }
  else
  {
    /* Allocation of a message buffer failed. */
    UartUtil_Print("Message allocation failed!\n");
    return errorAllocFailed;
  }
}

/******************************************************************************
* The App_WaitMsg(nwkMessage_t *pMsg, uint8_t msgType) function does not, as
* the name implies, wait for a message, thus blocking the execution of the
* state machine. Instead the function analyzes the supplied message to determine
* whether or not the message is of the expected type.
* The function may return either of the following values:
*   errorNoError: The message was of the expected type.
*   errorNoMessage: The message pointer is NULL.
*   errorWrongConfirm: The message is not of the expected type.
*
******************************************************************************/
static uint8_t App_WaitMsg(nwkMessage_t *pMsg, uint8_t msgType)
{
  /* Do we have a message? If not, the exit with error code */
  if(pMsg == NULL)
    return errorNoMessage;

  /* Is it the expected message type? If not then exit with error code */
  if(pMsg->msgType != msgType)
    return errorWrongConfirm;

  /* Found the expected message. Return with success code */
  return errorNoError;
}

/*****************************************************************************
* Handles all key events for this device.
* Interface assumptions: None
* Return value: None
*****************************************************************************/
static void App_HandleKeys
  (
  key_event_t events  /*IN: Events from keyboard modul  */
  )
{
  switch ( events ) 
    { 
      case gKBD_EventSW1_c:
      case gKBD_EventSW2_c:
      case gKBD_EventSW3_c:
      case gKBD_EventSW4_c:
      case gKBD_EventLongSW1_c:
      case gKBD_EventLongSW2_c:
      case gKBD_EventLongSW3_c:
      case gKBD_EventLongSW4_c:
        if(gState == stateInit)
          {
          StopLed1Flashing;
          StopLed2Flashing;
          StopLed3Flashing;
          StopLed4Flashing;
          Led1Off;
          Led2Off;
          Led3Off;
          Led4Off;
          LCD_ClearDisplay();
          LCD_WriteString(1,"Application");
          LCD_WriteString(2,"    started");     
          TS_SendEvent(gZappTaskID_c, evtInit);       
          }
    break;
    }    
}                                                      

/*****************************************************************************
* The DeepSleepWakeupStackProc(void) function is called each time the 
* application exits the DeepSleep mode .
* 
* Return value:
*     None
*****************************************************************************/
void DeepSleepWakeupStackProc(void){
  return;
}

/******************************************************************************
* The following functions are called by the MAC to put messages into the
* Application's queue. They need to be defined even if they are not used
* in order to avoid linker errors.
******************************************************************************/

uint8_t MLME_NWK_SapHandler(nwkMessage_t * pMsg)
{
  /* Put the incoming MLME message in the applications input queue. */
  MSG_Queue(&mMlmeNwkInputQueue, pMsg);
  TS_SendEvent(gZappTaskID_c, evtMessageFromMLME);
  return gSuccess_c;
}

uint8_t MCPS_NWK_SapHandler(mcpsToNwkMessage_t *pMsg)
{
  /* If the message is not handled anywhere it must be freed. */
  MSG_Free(pMsg);
  return gSuccess_c;
}

uint8_t ASP_APP_SapHandler(aspToAppMsg_t *pMsg)
{
  /* If the message is not handled anywhere it must be freed. */
  MSG_Free(pMsg);
  return gSuccess_c;
}