/*******************************************************************************
* Name : PKB_rxCharEvent
* -----------------------------------------------------------------------------
* Input : dd - received character
* Output : fills 'Rxwrite' with 'length' to 'Data' frame's fields
* Returned Value : none
* Description : Callback function called by L1 at any character receiving
*******************************************************************************/
void PKB_rxCharEvent( byte p_rxChar )
{
switch( PKB_rxState )
{
case PKB_RX_FSM_STATE.PKB_RX_IDLE:
byteCount = 0;
packetLength = 0;
packetAndCrcLength = 0;
if( p_rxChar == PKB_PREAMBLE_FF )
{
PKB_rxState = PKB_RX_FSM_STATE.PKB_RX_PREAMBLE_FF;
}
break;
case PKB_RX_FSM_STATE.PKB_RX_PREAMBLE_FF:
if( p_rxChar == SS_SOP_RP30 )
{
crcAccumulator = 0x5a5a;
PKB_rxState = PKB_RX_FSM_STATE.PKB_RX_START_OF_PACKET;
PKB_rxBuffer[byteCount] = p_rxChar;
byteCount++;
}
else
{
PKB_rxState = PKB_RX_FSM_STATE.PKB_RX_IDLE;
}
break;
case PKB_RX_FSM_STATE.PKB_RX_START_OF_PACKET:
///@Note (Kien ##): Start Timer for frame
// CTRL_timerStart( PKB_RX_TIMER );
Start_Snif_Timer(PKB_MAX_RX_DELAY);
PKB_rxState = PKB_RX_FSM_STATE.PKB_RX_RECEIVING;
PKB_rxBuffer[byteCount] = p_rxChar;
byteCount++;
// The packet len is calculated from the len field in air + 1
packetLength = ((0x7F)&(p_rxChar)) + 1; //TODO: usare la maschera per prendere la len
// We have to add 2 bytes to the packet len
packetAndCrcLength = packetLength + 2;
if( (packetAndCrcLength > PK_MAX_BUFFER_LEN) || (packetAndCrcLength < PK_MIN_LEN) )
{
PKB_rxState = PKB_RX_FSM_STATE.PKB_RX_IDLE;
///@NOTE (Kien ##): stop Timer for frame
// CTRL_timerStop( PKB_RX_TIMER );
Stop_Snif_Timer();
}
else
{
PKB_rxState = PKB_RX_FSM_STATE.PKB_RX_RECEIVING;
}
break;
case PKB_RX_FSM_STATE.PKB_RX_RECEIVING:
PKB_rxBuffer[byteCount] = p_rxChar;
byteCount++;
if( byteCount == packetLength )
{
PKB_rxState = PKB_RX_FSM_STATE.PKB_RX_CRC;
}
break;
case PKB_RX_FSM_STATE.PKB_RX_CRC:
///@NOTE (Kien ##): Check CRC
// CRC_ACCUM(crcAccumulator,p_rxChar);
crcAccumulator = Get_CRC(PKB_rxBuffer, byteCount);
byteCount++;
if( byteCount == packetAndCrcLength )
{
PKB_rxState = PKB_RX_FSM_STATE.PKB_RX_IDLE;
byteCount = 0;
packetLength = 0;
packetAndCrcLength = 0;
L2_rxCheckPacket( PKB_rxBuffer,crcAccumulator ); //@NOTE Kien(2.0): SS2.0 call L2 check frame
///@NOTE (Kien ##): Stop Timer for frame
// CTRL_timerStop( PKB_RX_TIMER );
Stop_Snif_Timer();
}
break;
default:
PKB_rxState = PKB_RX_FSM_STATE.PKB_RX_IDLE;
break;
}
}
private void PKB_rxTimer(object sender, EventArgs e)
{
PKB_rxState = PKB_RX_FSM_STATE.PKB_RX_IDLE;
}
