text: /*
      FreeRTOS V9.0.0 - Copyright (C) 2016 Real Time Engineers Ltd.
      All rights reserved
  
      VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
  
      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 modification 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.                                   !<<
      ***************************************************************************
  
      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.  Full license text is available on the following
      link: http://www.freertos.org/a00114.html
  
      ***************************************************************************
       *                                                                       *
       *    FreeRTOS provides completely free yet professionally developed,    *
       *    robust, strictly quality controlled, supported, and cross          *
       *    platform software that is more than just the market leader, it     *
       *    is the industry's de facto standard.                               *
       *                                                                       *
       *    Help yourself get started quickly while simultaneously helping     *
       *    to support the FreeRTOS project by purchasing a FreeRTOS           *
       *    tutorial book, reference manual, or both:                          *
       *    http://www.FreeRTOS.org/Documentation                              *
       *                                                                       *
      ***************************************************************************
  
      http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
      the FAQ page "My application does not run, what could be wrong?".  Have you
      defined configASSERT()?
  
      http://www.FreeRTOS.org/support - In return for receiving this top quality
      embedded software for free we request you assist our global community by
      participating in the support forum.
  
      http://www.FreeRTOS.org/training - Investing in training allows your team to
      be as productive as possible as early as possible.  Now you can receive
      FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
      Ltd, and the world's leading authority on the world's leading RTOS.
  
      http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
      including FreeRTOS+Trace - an indispensable productivity tool, a DOS
      compatible FAT file system, and our tiny thread aware UDP/IP stack.
  
      http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
      Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
  
      http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
      Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
      licenses offer ticketed support, indemnification and commercial middleware.
  
      http://www.SafeRTOS.com - High Integrity Systems also provide a safety
      engineered and independently SIL3 certified version for use in safety and
      mission critical applications that require provable dependability.
  
      1 tab == 4 spaces!
  */
  
  
  #ifndef PORTMACRO_H
  #define PORTMACRO_H
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /*-----------------------------------------------------------
   * 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		short
  #define portSTACK_TYPE	uint32_t
  #define portBASE_TYPE	long
  
  typedef portSTACK_TYPE StackType_t;
  typedef long BaseType_t;
  typedef unsigned long UBaseType_t;
  
  #if( configUSE_16_BIT_TICKS == 1 )
  	typedef uint16_t TickType_t;
  	#define portMAX_DELAY ( TickType_t ) 0xffff
  #else
  	typedef uint32_t TickType_t;
  	#define portMAX_DELAY ( TickType_t ) 0xffffffffUL
  
  	/* 32-bit tick type on a 32-bit architecture, so reads of the tick count do
  	not need to be guarded with a critical section. */
  	#define portTICK_TYPE_IS_ATOMIC 1
  #endif
  /*-----------------------------------------------------------*/
  
  /* Architecture specifics. */
  #define portSTACK_GROWTH			( -1 )          // Stack grows DOWN on Cortex M4F
  #define portTICK_PERIOD_MS			( ( TickType_t ) 1000 / configTICK_RATE_HZ )
  #define portBYTE_ALIGNMENT			8
  
  /* Constants used with memory barrier intrinsics. */
  #define portSY_FULL_READ_WRITE		( 15 )
  
  /*-----------------------------------------------------------*/
  
  /* Scheduler utilities. */
  #define portYIELD()																\
  {																				\
  	/* Set a PendSV to request a context switch. */								\
  	portNVIC_INT_CTRL_REG = portNVIC_PENDSVSET_BIT;								\
  																				\
  	/* Barriers are normally not required but do ensure the code is completely	\
  	within the specified behaviour for the architecture. */						\
  	__dsb( portSY_FULL_READ_WRITE );											\
  	__isb( portSY_FULL_READ_WRITE );											\
  }
  /*-----------------------------------------------------------*/
  
  #define portNVIC_INT_CTRL_REG		( * ( ( volatile uint32_t * ) 0xe000ed04 ) )
  #define portNVIC_PENDSVSET_BIT		( 1UL << 28UL )
  // Modification for support of SystemView Profiler
  //#define portEND_SWITCHING_ISR( xSwitchRequired ) if( xSwitchRequired != pdFALSE ) portYIELD()
  #define portEND_SWITCHING_ISR( xSwitchRequired ) { if( xSwitchRequired != pdFALSE ) { traceISR_EXIT_TO_SCHEDULER(); portYIELD(); } else { traceISR_EXIT(); } }
  // End modification
  #define portYIELD_FROM_ISR( x ) portEND_SWITCHING_ISR( x )
  /*-----------------------------------------------------------*/
  
  /* Critical section management. */
  extern void vPortEnterCritical( void );
  extern void vPortExitCritical( void );
  
  #define portDISABLE_INTERRUPTS()				vPortRaiseBASEPRI()
  #define portENABLE_INTERRUPTS()					vPortSetBASEPRI( 0 )
  #define portENTER_CRITICAL()					vPortEnterCritical()
  #define portEXIT_CRITICAL()						vPortExitCritical()
  #define portSET_INTERRUPT_MASK_FROM_ISR()		ulPortRaiseBASEPRI()
  #define portCLEAR_INTERRUPT_MASK_FROM_ISR(x)	vPortSetBASEPRI(x)
  /*-----------------------------------------------------------*/
  
  /* Tickless idle/low power functionality. */
  #ifndef portSUPPRESS_TICKS_AND_SLEEP
  	extern void vPortSuppressTicksAndSleep( TickType_t xExpectedIdleTime );
  	#define portSUPPRESS_TICKS_AND_SLEEP( xExpectedIdleTime ) vPortSuppressTicksAndSleep( xExpectedIdleTime )
  #endif
  /*-----------------------------------------------------------*/
  
  /* Port specific optimisations. */
  #ifndef configUSE_PORT_OPTIMISED_TASK_SELECTION
  	#define configUSE_PORT_OPTIMISED_TASK_SELECTION 1
  #endif
  
  #if configUSE_PORT_OPTIMISED_TASK_SELECTION == 1
  
  	/* Check the configuration. */
  	#if( configMAX_PRIORITIES > 32 )
  		#error configUSE_PORT_OPTIMISED_TASK_SELECTION can only be set to 1 when configMAX_PRIORITIES is less than or equal to 32.  It is very rare that a system requires more than 10 to 15 difference priorities as tasks that share a priority will time slice.
  	#endif
  
  	/* Store/clear the ready priorities in a bit map. */
  	#define portRECORD_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) |= ( 1UL << ( uxPriority ) )
  	#define portRESET_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) &= ~( 1UL << ( uxPriority ) )
  
  	/*-----------------------------------------------------------*/
  
  	#define portGET_HIGHEST_PRIORITY( uxTopPriority, uxReadyPriorities ) uxTopPriority = ( 31UL - ( uint32_t ) __clz( ( uxReadyPriorities ) ) )
  
  #endif /* taskRECORD_READY_PRIORITY */
  /*-----------------------------------------------------------*/
  
  /* Task function macros as described on the FreeRTOS.org WEB site.  These are
  not necessary for to use this port.  They are defined so the common demo files
  (which build with all the ports) will build. */
  #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )
  #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )
  /*-----------------------------------------------------------*/
  
  #ifdef configASSERT
  	void vPortValidateInterruptPriority( void );
  	#define portASSERT_IF_INTERRUPT_PRIORITY_INVALID() 	vPortValidateInterruptPriority()
  #endif
  
  /* portNOP() is not required by this port. */
  #define portNOP()
  
  #define portINLINE __inline
  
  #ifndef portFORCE_INLINE
  	#define portFORCE_INLINE __forceinline
  #endif
  
  /*-----------------------------------------------------------*/
  
  static portFORCE_INLINE void vPortSetBASEPRI( uint32_t ulBASEPRI )
  {
  	__asm
  	{
  		/* Barrier instructions are not used as this function is only used to
  		lower the BASEPRI value. */
  		msr basepri, ulBASEPRI
  	}
  }
  /*-----------------------------------------------------------*/
  
  static portFORCE_INLINE void vPortRaiseBASEPRI( void )
  {
  uint32_t ulNewBASEPRI = configMAX_SYSCALL_INTERRUPT_PRIORITY;
  
  	__asm
  	{
  		/* Set BASEPRI to the max syscall priority to effect a critical
  		section. */
  		msr basepri, ulNewBASEPRI
  		dsb
  		isb
  	}
  }
  /*-----------------------------------------------------------*/
  
  static portFORCE_INLINE void vPortClearBASEPRIFromISR( void )
  {
  	__asm
  	{
  		/* Set BASEPRI to 0 so no interrupts are masked.  This function is only
  		used to lower the mask in an interrupt, so memory barriers are not 
  		used. */
  		msr basepri, #0
  	}
  }
  /*-----------------------------------------------------------*/
  
  static portFORCE_INLINE uint32_t ulPortRaiseBASEPRI( void )
  {
  uint32_t ulReturn, ulNewBASEPRI = configMAX_SYSCALL_INTERRUPT_PRIORITY;
  
  	__asm
  	{
  		/* Set BASEPRI to the max syscall priority to effect a critical
  		section. */
  		mrs ulReturn, basepri
  		msr basepri, ulNewBASEPRI
  		dsb
  		isb
  	}
  
  	return ulReturn;
  }
  /*-----------------------------------------------------------*/
  
  static portFORCE_INLINE BaseType_t xPortIsInsideInterrupt( void )
  {
  uint32_t ulCurrentInterrupt;
  BaseType_t xReturn;
  
  	/* Obtain the number of the currently executing interrupt. */
  	__asm
  	{
  		mrs ulCurrentInterrupt, ipsr
  	}
  
  	if( ulCurrentInterrupt == 0 )
  	{
  		xReturn = pdFALSE;
  	}
  	else
  	{
  		xReturn = pdTRUE;
  	}
  
  	return xReturn;
  }
  
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* PORTMACRO_H */
  
  