FreeRTOS-Kernel/Demo/ARM7_AT91SAM7X256_Eclipse/RTOSDemo/USB/USBSample.h

/*
	FreeRTOS V5.4.2 - Copyright (C) 2009 Real Time Engineers Ltd.

	This file is part of the FreeRTOS distribution.

	FreeRTOS is free software; you can redistribute it and/or modify it	under 
	the terms of the GNU General Public License (version 2) as published by the 
	Free Software Foundation and modified by the FreeRTOS exception.
	**NOTE** The exception to the GPL is included to allow you to distribute a
	combined work that includes FreeRTOS without being obliged to provide the 
	source code for proprietary components outside of the FreeRTOS kernel.  
	Alternative commercial license and support terms are also available upon 
	request.  See the licensing section of http://www.FreeRTOS.org for full 
	license details.

	FreeRTOS is distributed in the hope that it will be useful,	but WITHOUT
	ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
	more details.

	You should have received a copy of the GNU General Public License along
	with FreeRTOS; if not, write to the Free Software Foundation, Inc., 59
	Temple Place, Suite 330, Boston, MA  02111-1307  USA.


	***************************************************************************
	*                                                                         *
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	* See http://www.FreeRTOS.org/Documentation for details                   *
	*                                                                         *
	***************************************************************************

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	Please ensure to read the configuration and relevant port sections of the
	online documentation.

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*/

#ifndef USB_DEMO_H
#define USB_DEMO_H


/*-----------------------------------------------------------*/

#define usbQUEUE_LENGTH						( 0x3 )	/* Must have all bits set! */
#define usbEND_POINT_0						( 0 )
#define usbEND_POINT_1						( 1 )
#define usbRX_COUNT_MASK					( ( unsigned portLONG ) 0x7ff )
#define AT91C_UDP_STALLSENT					AT91C_UDP_ISOERROR

/* Structure used to take a snapshot of the USB status from within the ISR. */
typedef struct X_ISR_STATUS
{
	unsigned portLONG ulISR;
	unsigned portLONG ulCSR0;
	unsigned portCHAR ucFifoData[ 8 ];
} xISRStatus;

/* Macros to manipulate the control and status registers.  These registers 
cannot be accessed using a direct read modify write operation outside of the 
ISR as some bits are left unchanged by writing with a 0, and some are left 
unchanged by writing with a 1. */

#define usbCSR_SET_BIT( pulValueNow, ulBit )											\
{																						\
	/* Set TXCOMP, RX_DATA_BK0, RXSETUP, */												\
	/* STALLSENT and RX_DATA_BK1 to 1 so the */											\
	/* write has no effect. */															\
	( * ( ( unsigned portLONG * ) pulValueNow ) ) |= ( unsigned portLONG ) 0x4f;		\
																						\
	/* Clear the FORCE_STALL and TXPKTRDY bits */										\
	/* so the write has no effect. */													\
	( * ( ( unsigned portLONG * ) pulValueNow ) ) &= ( unsigned portLONG ) 0xffffffcf;	\
																						\
	/* Set whichever bit we want set. */												\
	( * ( ( unsigned portLONG * ) pulValueNow ) ) |= ( ulBit );							\
}

/*
 * Creates the queue used to communicate between the USB task and the USB ISR, then
 * createst the task that manages the USB peripheral.
 */
void vStartUSBTask( unsigned portBASE_TYPE uxPriority );

#endif