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

   1 /*\r
   2         FreeRTOS.org V5.3.1 - Copyright (C) 2003-2009 Richard Barry.\r
   3 \r
   4         This file is part of the FreeRTOS.org distribution.\r
   5 \r
   6         FreeRTOS.org is free software; you can redistribute it and/or modify it\r
   7         under the terms of the GNU General Public License (version 2) as published\r
   8         by the Free Software Foundation and modified by the FreeRTOS exception.\r
   9         **NOTE** The exception to the GPL is included to allow you to distribute a\r
  10         combined work that includes FreeRTOS.org without being obliged to provide\r
  11         the source code for any proprietary components.  Alternative commercial\r
  12         license and support terms are also available upon request.  See the \r
  13         licensing section of http://www.FreeRTOS.org for full details.\r
  14 \r
  15         FreeRTOS.org is distributed in the hope that it will be useful, but WITHOUT\r
  16         ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or\r
  17         FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for\r
  18         more details.\r
  19 \r
  20         You should have received a copy of the GNU General Public License along\r
  21         with FreeRTOS.org; if not, write to the Free Software Foundation, Inc., 59\r
  22         Temple Place, Suite 330, Boston, MA  02111-1307  USA.\r
  23 \r
  24 \r
  25         ***************************************************************************\r
  26         *                                                                         *\r
  27         * Get the FreeRTOS eBook!  See http://www.FreeRTOS.org/Documentation      *\r
  28         *                                                                         *\r
  29         * This is a concise, step by step, 'hands on' guide that describes both   *\r
  30         * general multitasking concepts and FreeRTOS specifics. It presents and   *\r
  31         * explains numerous examples that are written using the FreeRTOS API.     *\r
  32         * Full source code for all the examples is provided in an accompanying    *\r
  33         * .zip file.                                                              *\r
  34         *                                                                         *\r
  35         ***************************************************************************\r
  36 \r
  37         1 tab == 4 spaces!\r
  38 \r
  39         Please ensure to read the configuration and relevant port sections of the\r
  40         online documentation.\r
  41 \r
  42         http://www.FreeRTOS.org - Documentation, latest information, license and\r
  43         contact details.\r
  44 \r
  45         http://www.SafeRTOS.com - A version that is certified for use in safety\r
  46         critical systems.\r
  47 \r
  48         http://www.OpenRTOS.com - Commercial support, development, porting,\r
  49         licensing and training services.\r
  50 */\r
  51 \r
  52 #ifndef PORTMACRO_H\r
  53 #define PORTMACRO_H\r
  54 \r
  55 /*-----------------------------------------------------------\r
  56  * Port specific definitions.  \r
  57  *\r
  58  * The settings in this file configure FreeRTOS correctly for the\r
  59  * given hardware and compiler.\r
  60  *\r
  61  * These settings should not be altered.\r
  62  *-----------------------------------------------------------\r
  63  */\r
  64 \r
  65 /* Type definitions. */\r
  66 #define portCHAR                char\r
  67 #define portFLOAT               float\r
  68 #define portDOUBLE              double\r
  69 #define portLONG                long\r
  70 #define portSHORT               int\r
  71 #define portSTACK_TYPE  unsigned portSHORT\r
  72 #define portBASE_TYPE   portSHORT\r
  73 \r
  74 #if( configUSE_16_BIT_TICKS == 1 )\r
  75         typedef unsigned portSHORT portTickType;\r
  76         #define portMAX_DELAY ( portTickType ) 0xffff\r
  77 #else\r
  78         typedef unsigned portLONG portTickType;\r
  79         #define portMAX_DELAY ( portTickType ) 0xffffffff\r
  80 #endif\r
  81 \r
  82 /*-----------------------------------------------------------*/ \r
  83 \r
  84 /* Interrupt control macros. */\r
  85 #define portDISABLE_INTERRUPTS()        _DINT();\r
  86 #define portENABLE_INTERRUPTS()         _EINT();\r
  87 /*-----------------------------------------------------------*/\r
  88 \r
  89 /* Critical section control macros. */\r
  90 #define portNO_CRITICAL_SECTION_NESTING         ( ( unsigned portSHORT ) 0 )\r
  91 \r
  92 #define portENTER_CRITICAL()                                                                                                    \\r
  93 {                                                                                                                                                               \\r
  94 extern volatile unsigned portSHORT usCriticalNesting;                                                   \\r
  95                                                                                                                                                                 \\r
  96         portDISABLE_INTERRUPTS();                                                                                                       \\r
  97                                                                                                                                                                 \\r
  98         /* Now interrupts are disabled usCriticalNesting can be accessed */                     \\r
  99         /* directly.  Increment ulCriticalNesting to keep a count of how many */        \\r
 100         /* times portENTER_CRITICAL() has been called. */                                                       \\r
 101         usCriticalNesting++;                                                                                                            \\r
 102 }\r
 103 \r
 104 #define portEXIT_CRITICAL()                                                                                                             \\r
 105 {                                                                                                                                                               \\r
 106 extern volatile unsigned portSHORT usCriticalNesting;                                                   \\r
 107                                                                                                                                                                 \\r
 108         if( usCriticalNesting > portNO_CRITICAL_SECTION_NESTING )                                       \\r
 109         {                                                                                                                                                       \\r
 110                 /* Decrement the nesting count as we are leaving a critical section. */ \\r
 111                 usCriticalNesting--;                                                                                                    \\r
 112                                                                                                                                                                 \\r
 113                 /* If the nesting level has reached zero then interrupts should be */   \\r
 114                 /* re-enabled. */                                                                                                               \\r
 115                 if( usCriticalNesting == portNO_CRITICAL_SECTION_NESTING )                              \\r
 116                 {                                                                                                                                               \\r
 117                         portENABLE_INTERRUPTS();                                                                                        \\r
 118                 }                                                                                                                                               \\r
 119         }                                                                                                                                                       \\r
 120 }\r
 121 /*-----------------------------------------------------------*/\r
 122 \r
 123 /* Task utilities. */\r
 124 \r
 125 /*\r
 126  * Manual context switch called by portYIELD or taskYIELD.  \r
 127  */\r
 128 extern void vPortYield( void ); \r
 129 #define portYIELD() vPortYield()\r
 130 /*-----------------------------------------------------------*/\r
 131 \r
 132 /* Hardware specifics. */\r
 133 #define portBYTE_ALIGNMENT                      2\r
 134 #define portSTACK_GROWTH                        ( -1 )\r
 135 #define portTICK_RATE_MS                        ( ( portTickType ) 1000 / configTICK_RATE_HZ )  \r
 136 #define portNOP()       \r
 137 /*-----------------------------------------------------------*/\r
 138 \r
 139 /* Task function macros as described on the FreeRTOS.org WEB site. */\r
 140 #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )\r
 141 #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters ) __toplevel\r
 142 \r
 143 #if configINTERRUPT_EXAMPLE_METHOD == 2\r
 144 \r
 145 extern void vTaskSwitchContext( void );\r
 146 #define portYIELD_FROM_ISR( x ) if( x ) vTaskSwitchContext()\r
 147 \r
 148 #endif\r
 149 \r
 150 #endif /* PORTMACRO_H */\r
 151 \r