sleep_mode() power down breaks RF Communication

[umamaheswary]

Hi
I could run the LWmesh peer to peer application for my atmega256rfr2 devices.http://www.atmel.com/tools/lightweight_mesh.aspx.Now I modified the code for reducing power consumption in rf devices.The modified code for sending device  is as follows

Code: [Select]

volatile int lastPIRsensorState=1;
volatile int PIRsensorState=0;
void Hibernate(){
set_sleep_mode(SLEEP_MODE_PWR_DOWN);
ADCSRA&=~(1<<7);
sleep_enable();
EICRA|=(1<<ISC00);
EIMSK|=(1<<INT0);
sei();
sleep_disable();
EIMSK&=~(1<<INT0);
cli();
}
ISR(INT0_vect){
PIRsensorState=!lastPIRsensorState;
}
static void appDataConf(NWK_DataReq_t *req){
appDataReqBusy=false;
(void)req;
}
static void appSendData(void){

 if (appDataReqBusy)
    return;

 
  appDataReqBuffer[0]=PIRsensorState;
  appDataReq.dstAddr = 1-APP_ADDR;
  appDataReq.dstEndpoint = APP_ENDPOINT;
  appDataReq.srcEndpoint = APP_ENDPOINT;
  appDataReq.options = NWK_OPT_ENABLE_SECURITY;
  appDataReq.data = appDataReqBuffer;
  appDataReq.size = 1;
  appDataReq.confirm = appDataConf;
  NWK_DataReq(&appDataReq);
  appDataReqBusy = true;
}
static void appTimerHandler(SYS_Timer_t *timer)
{
  appSendData();
  (void)timer;
}
static void appInit(void)
{
  NWK_SetAddr(APP_ADDR);
  NWK_SetPanId(APP_PANID);
  PHY_SetChannel(APP_CHANNEL);
#ifdef PHY_AT86RF212
  PHY_SetBand(APP_BAND);
  PHY_SetModulation(APP_MODULATION);
#endif
  PHY_SetRxState(true);

 

  HAL_BoardInit();

  appTimer.interval = APP_FLUSH_TIMER_INTERVAL;
  appTimer.mode = SYS_TIMER_INTERVAL_MODE;
  appTimer.handler = appTimerHandler;
}

/*************************************************************************//**
*****************************************************************************/
static void APP_TaskHandler(void)
{
  switch (appState)
  {
    case APP_STATE_INITIAL:
    {
      appInit();
      appSendData();
      appState = APP_STATE_IDLE;
    } break;

    case APP_STATE_IDLE:
      break;

    default:
      break;
  }
}

/*************************************************************************//**
*****************************************************************************/
int main(void)
{
  SYS_Init();
  PORTD=1<<PD0
  HAL_UartInit(9600);
  while (1)
  {
    SYS_TaskHandler();
    HAL_UartTaskHandler();
    APP_TaskHandler();
   lastPIRsensorState=PIRsensorState;
   Hibernate();
  }
}
The device communication works well when the Hibernate() function is not called.But when this function is called it enters into a  deep sleep and communicate seldom .dis sleep mode affect rf communication?What is the mistake in my code please help.