]> git.sur5r.net Git - freertos/blob - FreeRTOS/Source/portable/Rowley/MSP430F449/portmacro.h
Add additional critical section to the default tickless implementations.
[freertos] / FreeRTOS / Source / portable / Rowley / MSP430F449 / portmacro.h
1 /*\r
2     FreeRTOS V7.5.2 - Copyright (C) 2013 Real Time Engineers Ltd.\r
3 \r
4     VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.\r
5 \r
6     ***************************************************************************\r
7      *                                                                       *\r
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15      *                                                                       *\r
16      *    Thank you!                                                         *\r
17      *                                                                       *\r
18     ***************************************************************************\r
19 \r
20     This file is part of the FreeRTOS distribution.\r
21 \r
22     FreeRTOS is free software; you can redistribute it and/or modify it under\r
23     the terms of the GNU General Public License (version 2) as published by the\r
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25 \r
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31     FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY\r
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34     link: http://www.freertos.org/a00114.html\r
35 \r
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63 */\r
64 \r
65 #ifndef PORTMACRO_H\r
66 #define PORTMACRO_H\r
67 \r
68 /*-----------------------------------------------------------\r
69  * Port specific definitions.  \r
70  *\r
71  * The settings in this file configure FreeRTOS correctly for the\r
72  * given hardware and compiler.\r
73  *\r
74  * These settings should not be altered.\r
75  *-----------------------------------------------------------\r
76  */\r
77 \r
78 /* Type definitions. */\r
79 #define portCHAR                char\r
80 #define portFLOAT               float\r
81 #define portDOUBLE              double\r
82 #define portLONG                long\r
83 #define portSHORT               int\r
84 #define portSTACK_TYPE  unsigned portSHORT\r
85 #define portBASE_TYPE   portSHORT\r
86 \r
87 #if( configUSE_16_BIT_TICKS == 1 )\r
88         typedef unsigned portSHORT portTickType;\r
89         #define portMAX_DELAY ( portTickType ) 0xffff\r
90 #else\r
91         typedef unsigned portLONG portTickType;\r
92         #define portMAX_DELAY ( portTickType ) 0xffffffff\r
93 #endif\r
94 \r
95 /*-----------------------------------------------------------*/ \r
96 \r
97 /* Interrupt control macros. */\r
98 #define portDISABLE_INTERRUPTS()        _DINT(); _NOP()\r
99 #define portENABLE_INTERRUPTS()         _EINT();\r
100 /*-----------------------------------------------------------*/\r
101 \r
102 /* Critical section control macros. */\r
103 #define portNO_CRITICAL_SECTION_NESTING         ( ( unsigned portSHORT ) 0 )\r
104 \r
105 #define portENTER_CRITICAL()                                                                                                    \\r
106 {                                                                                                                                                               \\r
107 extern volatile unsigned portSHORT usCriticalNesting;                                                   \\r
108                                                                                                                                                                 \\r
109         portDISABLE_INTERRUPTS();                                                                                                       \\r
110                                                                                                                                                                 \\r
111         /* Now interrupts are disabled usCriticalNesting can be accessed */                     \\r
112         /* directly.  Increment ulCriticalNesting to keep a count of how many */        \\r
113         /* times portENTER_CRITICAL() has been called. */                                                       \\r
114         usCriticalNesting++;                                                                                                            \\r
115 }\r
116 \r
117 #define portEXIT_CRITICAL()                                                                                                             \\r
118 {                                                                                                                                                               \\r
119 extern volatile unsigned portSHORT usCriticalNesting;                                                   \\r
120                                                                                                                                                                 \\r
121         if( usCriticalNesting > portNO_CRITICAL_SECTION_NESTING )                                       \\r
122         {                                                                                                                                                       \\r
123                 /* Decrement the nesting count as we are leaving a critical section. */ \\r
124                 usCriticalNesting--;                                                                                                    \\r
125                                                                                                                                                                 \\r
126                 /* If the nesting level has reached zero then interrupts should be */   \\r
127                 /* re-enabled. */                                                                                                               \\r
128                 if( usCriticalNesting == portNO_CRITICAL_SECTION_NESTING )                              \\r
129                 {                                                                                                                                               \\r
130                         portENABLE_INTERRUPTS();                                                                                        \\r
131                 }                                                                                                                                               \\r
132         }                                                                                                                                                       \\r
133 }\r
134 /*-----------------------------------------------------------*/\r
135 \r
136 /* Task utilities. */\r
137 \r
138 /*\r
139  * Manual context switch called by portYIELD or taskYIELD.  \r
140  */\r
141 extern void vPortYield( void ); \r
142 #define portYIELD() vPortYield()\r
143 /*-----------------------------------------------------------*/\r
144 \r
145 /* Hardware specifics. */\r
146 #define portBYTE_ALIGNMENT                      2\r
147 #define portSTACK_GROWTH                        ( -1 )\r
148 #define portTICK_RATE_MS                        ( ( portTickType ) 1000 / configTICK_RATE_HZ )  \r
149 #define portNOP()       \r
150 /*-----------------------------------------------------------*/\r
151 \r
152 /* Task function macros as described on the FreeRTOS.org WEB site. */\r
153 #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )\r
154 #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters ) __toplevel\r
155 \r
156 #if configINTERRUPT_EXAMPLE_METHOD == 2\r
157 \r
158 extern void vTaskSwitchContext( void );\r
159 #define portYIELD_FROM_ISR( x ) if( x ) vTaskSwitchContext()\r
160 \r
161 #endif\r
162 \r
163 #endif /* PORTMACRO_H */\r
164 \r