/*
	FreeRTOS.org V5.3.0 - Copyright (C) 2003-2009 Richard Barry.

	This file is part of the FreeRTOS.org distribution.

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	Temple Place, Suite 330, Boston, MA  02111-1307  USA.


	***************************************************************************
	*                                                                         *
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	*                                                                         *
	* This is a concise, step by step, 'hands on' guide that describes both   *
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	* explains numerous examples that are written using the FreeRTOS API.     *
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	* .zip file.                                                              *
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	***************************************************************************

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*/

/*
Changes from V3.2.4

	+ Modified the default MAC address as the one used previously was not liked
	  by some routers.

*/

#ifndef SAM_7_EMAC_H
#define SAM_7_EMAC_H

/* MAC address definition.  The MAC address must be unique on the network. */
#define emacETHADDR0 0
#define emacETHADDR1 0xbd
#define emacETHADDR2 0x33
#define emacETHADDR3 0x06
#define emacETHADDR4 0x68
#define emacETHADDR5 0x22

/* The IP address being used. */
#define emacIPADDR0 172
#define emacIPADDR1 25
#define emacIPADDR2 218
#define emacIPADDR3 205

/* The gateway address being used. */
#define emacGATEWAY_ADDR0 172
#define emacGATEWAY_ADDR1 25
#define emacGATEWAY_ADDR2 218
#define emacGATEWAY_ADDR3 3

/* The network mask being used. */
#define emacNET_MASK0 255
#define emacNET_MASK1 255
#define emacNET_MASK2 0
#define emacNET_MASK3 0

/*
 * Initialise the EMAC driver.  If successful a semaphore is returned that
 * is used by the EMAC ISR to indicate that Rx packets have been received.
 * If the initialisation fails then NULL is returned.
 */
xSemaphoreHandle xEMACInit( void );

/*
 * Send ulLength bytes from pcFrom.  This copies the buffer to one of the
 * EMAC Tx buffers, then indicates to the EMAC that the buffer is ready.
 * If lEndOfFrame is true then the data being copied is the end of the frame
 * and the frame can be transmitted. 
 */
portLONG lEMACSend( portCHAR *pcFrom, unsigned portLONG ulLength, portLONG lEndOfFrame );

/*
 * Frames can be read from the EMAC in multiple sections.
 * Read ulSectionLength bytes from the EMAC receive buffers to pcTo.  
 * ulTotalFrameLength is the size of the entire frame.  Generally vEMACRead
 * will be repetedly called until the sum of all the ulSectionLenths totals
 * the value of ulTotalFrameLength.
 */
void vEMACRead( portCHAR *pcTo, unsigned portLONG ulSectionLength, unsigned portLONG ulTotalFrameLength );

/*
 * The EMAC driver and interrupt service routines are defined in different 
 * files as the driver is compiled to THUMB, and the ISR to ARM.  This function
 * simply passes the semaphore used to communicate between the two.
 */
void vPassEMACSemaphore( xSemaphoreHandle xCreatedSemaphore );

/* 
 * Called by the Tx interrupt, this function traverses the buffers used to
 * hold the frame that has just completed transmission and marks each as
 * free again.
 */
void vClearEMACTxBuffer( void );

/*
 * Suspend on a semaphore waiting either for the semaphore to be obtained 
 * or a timeout.  The semaphore is used by the EMAC ISR to indicate that
 * data has been received and is ready for processing.
 */
void vEMACWaitForInput( void );

/*
 * Return the length of the next frame in the receive buffers.
 */
unsigned portLONG ulEMACInputLength( void );

#endif
