Source/portable/IAR/MSP430/portmacro.h

/*
	FreeRTOS.org V5.3.1 - Copyright (C) 2003-2009 Richard Barry.

	This file is part of the FreeRTOS.org distribution.

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	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
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	You should have received a copy of the GNU General Public License along
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	Temple Place, Suite 330, Boston, MA  02111-1307  USA.


	***************************************************************************
	*                                                                         *
	* Get the FreeRTOS eBook!  See http://www.FreeRTOS.org/Documentation      *
	*                                                                         *
	* This is a concise, step by step, 'hands on' guide that describes both   *
	* general multitasking concepts and FreeRTOS specifics. It presents and   *
	* explains numerous examples that are written using the FreeRTOS API.     *
	* Full source code for all the examples is provided in an accompanying    *
	* .zip file.                                                              *
	*                                                                         *
	***************************************************************************

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

	http://www.FreeRTOS.org - Documentation, latest information, license and
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*/

#ifndef PORTMACRO_H
#define PORTMACRO_H

/*-----------------------------------------------------------
 * Port specific definitions.
 *
 * The settings in this file configure FreeRTOS correctly for the
 * given hardware and compiler.
 *
 * These settings should not be altered.
 *-----------------------------------------------------------
 */

/* Type definitions. */
#define portCHAR		char
#define portFLOAT		float
#define portDOUBLE		double
#define portLONG		long
#define portSHORT		int
#define portSTACK_TYPE	unsigned portSHORT
#define portBASE_TYPE	portSHORT

#if( configUSE_16_BIT_TICKS == 1 )
	typedef unsigned portSHORT portTickType;
	#define portMAX_DELAY ( portTickType ) 0xffff
#else
	typedef unsigned portLONG portTickType;
	#define portMAX_DELAY ( portTickType ) 0xffffffff
#endif

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

/* Interrupt control macros. */
#define portDISABLE_INTERRUPTS()	_DINT();
#define portENABLE_INTERRUPTS()		_EINT();
/*-----------------------------------------------------------*/

/* Critical section control macros. */
#define portNO_CRITICAL_SECTION_NESTING		( ( unsigned portSHORT ) 0 )

#define portENTER_CRITICAL()													\
{																				\
extern volatile unsigned portSHORT usCriticalNesting;							\
																				\
	portDISABLE_INTERRUPTS();													\
																				\
	/* Now interrupts are disabled usCriticalNesting can be accessed */			\
	/* directly.  Increment ulCriticalNesting to keep a count of how many */	\
	/* times portENTER_CRITICAL() has been called. */							\
	usCriticalNesting++;														\
}

#define portEXIT_CRITICAL()														\
{																				\
extern volatile unsigned portSHORT usCriticalNesting;							\
																				\
	if( usCriticalNesting > portNO_CRITICAL_SECTION_NESTING )					\
	{																			\
		/* Decrement the nesting count as we are leaving a critical section. */	\
		usCriticalNesting--;													\
																				\
		/* If the nesting level has reached zero then interrupts should be */	\
		/* re-enabled. */														\
		if( usCriticalNesting == portNO_CRITICAL_SECTION_NESTING )				\
		{																		\
			portENABLE_INTERRUPTS();											\
		}																		\
	}																			\
}
/*-----------------------------------------------------------*/

/* Task utilities. */

/*
 * Manual context switch called by portYIELD or taskYIELD.
 */
extern void vPortYield( void );
#define portYIELD() vPortYield()
/*-----------------------------------------------------------*/

/* Hardware specifics. */
#define portBYTE_ALIGNMENT			2
#define portSTACK_GROWTH			( -1 )
#define portTICK_RATE_MS			( ( portTickType ) 1000 / configTICK_RATE_HZ )	
#define portNOP()	
/*-----------------------------------------------------------*/

/* Task function macros as described on the FreeRTOS.org WEB site. */
#define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )
#define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )

#if configINTERRUPT_EXAMPLE_METHOD == 2

extern void vTaskSwitchContext( void );
#define portYIELD_FROM_ISR( x ) if( x ) vTaskSwitchContext()

#endif

#endif /* PORTMACRO_H */