2 FreeRTOS V9.0.0 - Copyright (C) 2016 Real Time Engineers Ltd.
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5 VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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7 This file is part of the FreeRTOS distribution.
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9 FreeRTOS is free software; you can redistribute it and/or modify it under
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10 the terms of the GNU General Public License (version 2) as published by the
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11 Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
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13 ***************************************************************************
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14 >>! NOTE: The modification to the GPL is included to allow you to !<<
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15 >>! distribute a combined work that includes FreeRTOS without being !<<
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16 >>! obliged to provide the source code for proprietary components !<<
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17 >>! outside of the FreeRTOS kernel. !<<
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18 ***************************************************************************
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20 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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21 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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22 FOR A PARTICULAR PURPOSE. Full license text is available on the following
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23 link: http://www.freertos.org/a00114.html
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25 ***************************************************************************
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27 * FreeRTOS provides completely free yet professionally developed, *
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28 * robust, strictly quality controlled, supported, and cross *
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29 * platform software that is more than just the market leader, it *
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30 * is the industry's de facto standard. *
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32 * Help yourself get started quickly while simultaneously helping *
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33 * to support the FreeRTOS project by purchasing a FreeRTOS *
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34 * tutorial book, reference manual, or both: *
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35 * http://www.FreeRTOS.org/Documentation *
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37 ***************************************************************************
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39 http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading
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40 the FAQ page "My application does not run, what could be wrong?". Have you
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41 defined configASSERT()?
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43 http://www.FreeRTOS.org/support - In return for receiving this top quality
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44 embedded software for free we request you assist our global community by
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45 participating in the support forum.
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47 http://www.FreeRTOS.org/training - Investing in training allows your team to
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48 be as productive as possible as early as possible. Now you can receive
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49 FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
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50 Ltd, and the world's leading authority on the world's leading RTOS.
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52 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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53 including FreeRTOS+Trace - an indispensable productivity tool, a DOS
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54 compatible FAT file system, and our tiny thread aware UDP/IP stack.
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56 http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
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57 Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
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59 http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
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60 Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS
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61 licenses offer ticketed support, indemnification and commercial middleware.
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63 http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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64 engineered and independently SIL3 certified version for use in safety and
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65 mission critical applications that require provable dependability.
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78 /*-----------------------------------------------------------
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79 * Port specific definitions.
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81 * The settings in this file configure FreeRTOS correctly for the
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82 * given hardware and compiler.
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84 * These settings should not be altered.
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85 *-----------------------------------------------------------
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88 /* Type definitions. */
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89 #define portCHAR char
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90 #define portFLOAT float
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91 #define portDOUBLE double
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92 #define portLONG long
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93 #define portSHORT short
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94 #define portSTACK_TYPE uint8_t
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95 #define portBASE_TYPE char
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97 typedef portSTACK_TYPE StackType_t;
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98 typedef signed char BaseType_t;
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99 typedef unsigned char UBaseType_t;
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102 #if( configUSE_16_BIT_TICKS == 1 )
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103 typedef uint16_t TickType_t;
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104 #define portMAX_DELAY ( TickType_t ) 0xffff
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106 typedef uint32_t TickType_t;
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107 #define portMAX_DELAY ( TickType_t ) 0xffffffffUL
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109 /*-----------------------------------------------------------*/
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111 /* Hardware specifics. */
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112 #define portBYTE_ALIGNMENT 1
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113 #define portSTACK_GROWTH ( -1 )
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114 #define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
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115 #define portYIELD() __asm( "swi" );
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116 /*-----------------------------------------------------------*/
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118 /* Critical section handling. */
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119 #define portENABLE_INTERRUPTS() __asm( "cli" )
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120 #define portDISABLE_INTERRUPTS() __asm( "sei" )
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123 * Disable interrupts before incrementing the count of critical section nesting.
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124 * The nesting count is maintained so we know when interrupts should be
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125 * re-enabled. Once interrupts are disabled the nesting count can be accessed
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126 * directly. Each task maintains its own nesting count.
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128 #define portENTER_CRITICAL() \
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130 extern volatile UBaseType_t uxCriticalNesting; \
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132 portDISABLE_INTERRUPTS(); \
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133 uxCriticalNesting++; \
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137 * Interrupts are disabled so we can access the nesting count directly. If the
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138 * nesting is found to be 0 (no nesting) then we are leaving the critical
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139 * section and interrupts can be re-enabled.
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141 #define portEXIT_CRITICAL() \
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143 extern volatile UBaseType_t uxCriticalNesting; \
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145 uxCriticalNesting--; \
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146 if( uxCriticalNesting == 0 ) \
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148 portENABLE_INTERRUPTS(); \
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151 /*-----------------------------------------------------------*/
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153 /* Task utilities. */
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156 * These macros are very simple as the processor automatically saves and
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157 * restores its registers as interrupts are entered and exited. In
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158 * addition to the (automatically stacked) registers we also stack the
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159 * critical nesting count. Each task maintains its own critical nesting
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160 * count as it is legitimate for a task to yield from within a critical
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161 * section. If the banked memory model is being used then the PPAGE
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162 * register is also stored as part of the tasks context.
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165 #ifdef BANKED_MODEL
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167 * Load the stack pointer for the task, then pull the critical nesting
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168 * count and PPAGE register from the stack. The remains of the
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169 * context are restored by the RTI instruction.
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171 #define portRESTORE_CONTEXT() \
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174 .globl pxCurrentTCB ; void * \n\
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175 .globl uxCriticalNesting ; char \n\
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177 ldx pxCurrentTCB \n\
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178 lds 0,x ; Stack \n\
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180 movb 1,sp+,uxCriticalNesting \n\
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181 movb 1,sp+,0x30 ; PPAGE \n\
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186 * By the time this macro is called the processor has already stacked the
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187 * registers. Simply stack the nesting count and PPAGE value, then save
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188 * the task stack pointer.
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190 #define portSAVE_CONTEXT() \
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193 .globl pxCurrentTCB ; void * \n\
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194 .globl uxCriticalNesting ; char \n\
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196 movb 0x30, 1,-sp ; PPAGE \n\
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197 movb uxCriticalNesting, 1,-sp \n\
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199 ldx pxCurrentTCB \n\
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200 sts 0,x ; Stack \n\
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206 * These macros are as per the BANKED versions above, but without saving
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207 * and restoring the PPAGE register.
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210 #define portRESTORE_CONTEXT() \
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213 .globl pxCurrentTCB ; void * \n\
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214 .globl uxCriticalNesting ; char \n\
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216 ldx pxCurrentTCB \n\
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217 lds 0,x ; Stack \n\
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219 movb 1,sp+,uxCriticalNesting \n\
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223 #define portSAVE_CONTEXT() \
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226 .globl pxCurrentTCB ; void * \n\
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227 .globl uxCriticalNesting ; char \n\
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229 movb uxCriticalNesting, 1,-sp \n\
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231 ldx pxCurrentTCB \n\
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232 sts 0,x ; Stack \n\
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238 * Utility macros to save/restore correct software registers for GCC. This is
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239 * useful when GCC does not generate appropriate ISR head/tail code.
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241 #define portISR_HEAD() \
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244 movw _.frame, 2,-sp \n\
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245 movw _.tmp, 2,-sp \n\
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246 movw _.z, 2,-sp \n\
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247 movw _.xy, 2,-sp \n\
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248 ;movw _.d2, 2,-sp \n\
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249 ;movw _.d1, 2,-sp \n\
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253 #define portISR_TAIL() \
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256 movw 2,sp+, _.xy \n\
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257 movw 2,sp+, _.z \n\
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258 movw 2,sp+, _.tmp \n\
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259 movw 2,sp+, _.frame \n\
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260 ;movw 2,sp+, _.d1 \n\
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261 ;movw 2,sp+, _.d2 \n\
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267 * Utility macro to call macros above in correct order in order to perform a
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268 * task switch from within a standard ISR. This macro can only be used if
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269 * the ISR does not use any local (stack) variables. If the ISR uses stack
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270 * variables portYIELD() should be used in it's place.
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273 #define portTASK_SWITCH_FROM_ISR() \
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274 portSAVE_CONTEXT(); \
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275 vTaskSwitchContext(); \
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276 portRESTORE_CONTEXT();
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279 /* Task function macros as described on the FreeRTOS.org WEB site. */
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280 #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )
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281 #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )
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287 #endif /* PORTMACRO_H */
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