#include <xc.h>
#if defined(_CAN1) || defined(_CAN2)

#include "CANTypes.h"
#include <peripheral/CAN.h>


/***************************

 * CAN Receive

 * *************************/

CANRxMessageBuffer * CANGetRxMessage(CAN_MODULE module, CAN_CHANNEL channel)

{

	/* This function return a pointer to

	 * the next message to read. */

	

	CAN_REGISTERS * canRegisters = (CAN_REGISTERS *)canModules[module];

	

	if(canRegisters->canFifoRegisters[channel].CxFIFOINTbits.RXNEMPTYIF == 0)

	{

		return(NULL);

	}

	else

	{

		return((CANRxMessageBuffer *)PA_TO_KVA1(canRegisters->canFifoRegisters[channel].CxFIFOUA));

	}

}



void CANUpdateChannel(CAN_MODULE module, CAN_CHANNEL channel)

{

	/* This function shoudl be called by the 

	 * application when it is done processing

	 * the last message that was read

	 */



	CAN_REGISTERS * canRegisters = (CAN_REGISTERS *)canModules[module];

	canRegisters->canFifoRegisters[channel].CxFIFOCONSET = CxFIFOCON_UINC_MASK;





}



void CANConfigureChannelForRx(CAN_MODULE module, CAN_CHANNEL channel, 

        UINT32 channelSize, CAN_RX_DATA_MODE dataOnly)

{

	/* This function will configure a channel for RX. */



	CAN_REGISTERS * canRegisters = (CAN_REGISTERS *)canModules[module];



	canRegisters->canFifoRegisters[channel].CxFIFOCONCLR = CxFIFOCON_TXEN_MASK;

	canRegisters->canFifoRegisters[channel].CxFIFOCONbits.FSIZE = channelSize - 1;



	if(dataOnly == CAN_RX_DATA_ONLY)

	{

		canRegisters->canFifoRegisters[channel].CxFIFOCONSET = CxFIFOCON_DONLY_MASK;

	}

	else if(dataOnly == CAN_RX_FULL_RECEIVE)

	{

		canRegisters->canFifoRegisters[channel].CxFIFOCONCLR = CxFIFOCON_DONLY_MASK;

	}

    else

    {

    }

}
#endif /* defined(_CAN1) || defined(_CAN2) */