【经验分享】FreeRTOS 学习笔记——移植

小恩GG

FreeRTOS学习笔记

        FreeRTOS 是高度可配置的，所有的可配置项都在FreeRTOSConfig.h 文件中。每一个FreeRTOS Demo中都必须包含了一个配置好的FreeRTOSConfig.h文件，用户根据实际应用来裁剪定制FreeRTOS内核。这个配置文件是针对用户程序的，而非内核。

FreeRTOS学习笔记（三）——FreeRTOS内核配置说明.pdf (389.19 KB, 下载次数: 128)

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表一 FreeRTOSConfig.h

1. #ifndef FREERTOS_CONFIG_H
   
2. #define FREERTOS_CONFIG_H
   
3. 
   
4. #define configUSE_PREEMPTION 1
   
5. #define configUSE_IDLE_HOOK 0
   
6. #define configUSE_TICK_HOOK 0
   
7. #define configCPU_CLOCK_HZ (SystemCoreClock)
   
8. #define configTICK_RATE_HZ ((TickType_t)1000)
   
9. #define configMAX_PRIORITIES (5)
   
10. #define configMINIMAL_STACK_SIZE ((unsigned short)90)
    
11. #define configTOTAL_HEAP_SIZE ((size_t)(10 * 1024))
    
12. #define configMAX_TASK_NAME_LEN (10)
    
13. #define configUSE_TRACE_FACILITY 1
    
14. #define configUSE_16_BIT_TICKS 0
    
15. #define configIDLE_SHOULD_YIELD 1
    
16. #define configUSE_MUTEXES 1
    
17. #define configQUEUE_REGISTRY_SIZE 8
    
18. #define configCHECK_FOR_STACK_OVERFLOW 0
    
19. #define configUSE_RECURSIVE_MUTEXES 1
    
20. #define configUSE_MALLOC_FAILED_HOOK 0
    
21. #define configUSE_APPLICATION_TASK_TAG 0
    
22. #define configUSE_COUNTING_SEMAPHORES 1
    
23. #define configGENERATE_RUN_TIME_STATS 0
    
24. #define configUSE_TIME_SLICING 0
    
25. 
    
26. /* Co-routine definitions. */
    
27. #define configUSE_CO_ROUTINES 0
    
28. #define configMAX_CO_ROUTINE_PRIORITIES (2)
    
29. 
    
30. /* Software timer definitions. */
    
31. #define configUSE_TIMERS 1
    
32. #define configTIMER_TASK_PRIORITY (2)
    
33. #define configTIMER_QUEUE_LENGTH 10
    
34. #define configTIMER_TASK_STACK_DEPTH (configMINIMAL_STACK_SIZE * 2)
    
35. 
    
36. /* Set the following definitions to 1 to include the API function, or zero
    
37. to exclude the API function. */
    
38. #define INCLUDE_vTaskPrioritySet 1
    
39. #define INCLUDE_uxTaskPriorityGet 1
    
40. #define INCLUDE_vTaskDelete 1
    
41. #define INCLUDE_vTaskCleanUpResources 1
    
42. #define INCLUDE_vTaskSuspend 1
    
43. #define INCLUDE_vTaskDelayUntil 1
    
44. #define INCLUDE_vTaskDelay 1
    
45. 
    
46. /* Cortex-M specific definitions. */
    
47. #ifdef __NVIC_PRIO_BITS
    
48. /* __BVIC_PRIO_BITS will be specified when CMSIS is being used. */
    
49. #define configPRIO_BITS __NVIC_PRIO_BITS
    
50. #else
    
51. #define configPRIO_BITS 4 /* 15 priority levels */
    
52. #endif
    
53. 
    
54. /* The lowest interrupt priority that can be used in a call to a "set priority"
    
55. function. */
    
56. #define configLIBRARY_LOWEST_INTERRUPT_PRIORITY 0xf
    
57. 
    
58. /* The highest interrupt priority that can be used by any interrupt service
    
59. routine that makes calls to interrupt safe FreeRTOS API functions.  DO NOT CALL
    
60. INTERRUPT SAFE FREERTOS API FUNCTIONS FROM ANY INTERRUPT THAT HAS A HIGHER
    
61. PRIORITY THAN THIS! (higher priorities are lower numeric values. */
    
62. #define configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY 5
    
63. 
    
64. /* Interrupt priorities used by the kernel port layer itself.  These are generic
    
65. to all Cortex-M ports, and do not rely on any particular library functions. */
    
66. #define configKERNEL_INTERRUPT_PRIORITY (configLIBRARY_LOWEST_INTERRUPT_PRIORITY << (8 - configPRIO_BITS))
    
67. /* !!!! configMAX_SYSCALL_INTERRUPT_PRIORITY must not be set to zero !!!!
    
68. See http://www.FreeRTOS.org/RTOS-Cortex-M3-M4.html. */
    
69. #define configMAX_SYSCALL_INTERRUPT_PRIORITY (configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY << (8 - configPRIO_BITS))
    
70. 
    
71. /* Normal assert() semantics without relying on the provision of an assert.h
    
72. header file. */
    
73. #define configASSERT(x)           \
    
74.     if ((x) == 0)                 \
    
75.     {                             \
    
76.         taskDISABLE_INTERRUPTS(); \
    
77.         for (;;)                  \
    
78.             ;                     \
    
79.     }
    
80. 
    
81. /* Definitions that map the FreeRTOS port interrupt handlers to their CMSIS
    
82. standard names. */
    
83. #define vPortSVCHandler SVC_Handler
    
84. #define xPortPendSVHandler PendSV_Handler
    
85. #define xPortSysTickHandler SysTick_Handler
    
86. 
    
87. #endif /* FREERTOS_CONFIG_H */
    

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