git.sur5r.net Git - freertos/blob - Source/portable/Rowley/MSP430F449/portmacro.h

   1 /*\r
   2     FreeRTOS V6.1.1 - Copyright (C) 2011 Real Time Engineers Ltd.\r
   3 \r
   4     ***************************************************************************\r
   5     *                                                                         *\r
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  12     *                                                                         *\r
  13     * then take a look at the FreeRTOS books - available as PDF or paperback  *\r
  14     *                                                                         *\r
  15     *        "Using the FreeRTOS Real Time Kernel - a Practical Guide"        *\r
  16     *                  http://www.FreeRTOS.org/Documentation                  *\r
  17     *                                                                         *\r
  18     * A pdf reference manual is also available.  Both are usually delivered   *\r
  19     * to your inbox within 20 minutes to two hours when purchased between 8am *\r
  20     * and 8pm GMT (although please allow up to 24 hours in case of            *\r
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  22     *                                                                         *\r
  23     ***************************************************************************\r
  24 \r
  25     This file is part of the FreeRTOS distribution.\r
  26 \r
  27     FreeRTOS is free software; you can redistribute it and/or modify it under\r
  28     the terms of the GNU General Public License (version 2) as published by the\r
  29     Free Software Foundation AND MODIFIED BY the FreeRTOS exception.\r
  30     ***NOTE*** The exception to the GPL is included to allow you to distribute\r
  31     a combined work that includes FreeRTOS without being obliged to provide the\r
  32     source code for proprietary components outside of the FreeRTOS kernel.\r
  33     FreeRTOS is distributed in the hope that it will be useful, but WITHOUT\r
  34     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or\r
  35     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for\r
  36     more details. You should have received a copy of the GNU General Public \r
  37     License and the FreeRTOS license exception along with FreeRTOS; if not it \r
  38     can be viewed here: http://www.freertos.org/a00114.html and also obtained \r
  39     by writing to Richard Barry, contact details for whom are available on the\r
  40     FreeRTOS WEB site.\r
  41 \r
  42     1 tab == 4 spaces!\r
  43 \r
  44     http://www.FreeRTOS.org - Documentation, latest information, license and\r
  45     contact details.\r
  46 \r
  47     http://www.SafeRTOS.com - A version that is certified for use in safety\r
  48     critical systems.\r
  49 \r
  50     http://www.OpenRTOS.com - Commercial support, development, porting,\r
  51     licensing and training services.\r
  52 */\r
  53 \r
  54 #ifndef PORTMACRO_H\r
  55 #define PORTMACRO_H\r
  56 \r
  57 /*-----------------------------------------------------------\r
  58  * Port specific definitions.  \r
  59  *\r
  60  * The settings in this file configure FreeRTOS correctly for the\r
  61  * given hardware and compiler.\r
  62  *\r
  63  * These settings should not be altered.\r
  64  *-----------------------------------------------------------\r
  65  */\r
  66 \r
  67 /* Type definitions. */\r
  68 #define portCHAR                char\r
  69 #define portFLOAT               float\r
  70 #define portDOUBLE              double\r
  71 #define portLONG                long\r
  72 #define portSHORT               int\r
  73 #define portSTACK_TYPE  unsigned portSHORT\r
  74 #define portBASE_TYPE   portSHORT\r
  75 \r
  76 #if( configUSE_16_BIT_TICKS == 1 )\r
  77         typedef unsigned portSHORT portTickType;\r
  78         #define portMAX_DELAY ( portTickType ) 0xffff\r
  79 #else\r
  80         typedef unsigned portLONG portTickType;\r
  81         #define portMAX_DELAY ( portTickType ) 0xffffffff\r
  82 #endif\r
  83 \r
  84 /*-----------------------------------------------------------*/ \r
  85 \r
  86 /* Interrupt control macros. */\r
  87 #define portDISABLE_INTERRUPTS()        _DINT();\r
  88 #define portENABLE_INTERRUPTS()         _EINT();\r
  89 /*-----------------------------------------------------------*/\r
  90 \r
  91 /* Critical section control macros. */\r
  92 #define portNO_CRITICAL_SECTION_NESTING         ( ( unsigned portSHORT ) 0 )\r
  93 \r
  94 #define portENTER_CRITICAL()                                                                                                    \\r
  95 {                                                                                                                                                               \\r
  96 extern volatile unsigned portSHORT usCriticalNesting;                                                   \\r
  97                                                                                                                                                                 \\r
  98         portDISABLE_INTERRUPTS();                                                                                                       \\r
  99                                                                                                                                                                 \\r
 100         /* Now interrupts are disabled usCriticalNesting can be accessed */                     \\r
 101         /* directly.  Increment ulCriticalNesting to keep a count of how many */        \\r
 102         /* times portENTER_CRITICAL() has been called. */                                                       \\r
 103         usCriticalNesting++;                                                                                                            \\r
 104 }\r
 105 \r
 106 #define portEXIT_CRITICAL()                                                                                                             \\r
 107 {                                                                                                                                                               \\r
 108 extern volatile unsigned portSHORT usCriticalNesting;                                                   \\r
 109                                                                                                                                                                 \\r
 110         if( usCriticalNesting > portNO_CRITICAL_SECTION_NESTING )                                       \\r
 111         {                                                                                                                                                       \\r
 112                 /* Decrement the nesting count as we are leaving a critical section. */ \\r
 113                 usCriticalNesting--;                                                                                                    \\r
 114                                                                                                                                                                 \\r
 115                 /* If the nesting level has reached zero then interrupts should be */   \\r
 116                 /* re-enabled. */                                                                                                               \\r
 117                 if( usCriticalNesting == portNO_CRITICAL_SECTION_NESTING )                              \\r
 118                 {                                                                                                                                               \\r
 119                         portENABLE_INTERRUPTS();                                                                                        \\r
 120                 }                                                                                                                                               \\r
 121         }                                                                                                                                                       \\r
 122 }\r
 123 /*-----------------------------------------------------------*/\r
 124 \r
 125 /* Task utilities. */\r
 126 \r
 127 /*\r
 128  * Manual context switch called by portYIELD or taskYIELD.  \r
 129  */\r
 130 extern void vPortYield( void ); \r
 131 #define portYIELD() vPortYield()\r
 132 /*-----------------------------------------------------------*/\r
 133 \r
 134 /* Hardware specifics. */\r
 135 #define portBYTE_ALIGNMENT                      2\r
 136 #define portSTACK_GROWTH                        ( -1 )\r
 137 #define portTICK_RATE_MS                        ( ( portTickType ) 1000 / configTICK_RATE_HZ )  \r
 138 #define portNOP()       \r
 139 /*-----------------------------------------------------------*/\r
 140 \r
 141 /* Task function macros as described on the FreeRTOS.org WEB site. */\r
 142 #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )\r
 143 #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters ) __toplevel\r
 144 \r
 145 #if configINTERRUPT_EXAMPLE_METHOD == 2\r
 146 \r
 147 extern void vTaskSwitchContext( void );\r
 148 #define portYIELD_FROM_ISR( x ) if( x ) vTaskSwitchContext()\r
 149 \r
 150 #endif\r
 151 \r
 152 #endif /* PORTMACRO_H */\r
 153 \r