ChaN老师FatFS源码的多任务底层接口函数中都增加了CMSIS-RTOS支持，顺应潮流

eric2013

看的是0.13a：http://www.armbbs.cn/forum.php?mod=viewthread&tid=45206

1. /*------------------------------------------------------------------------*/
2. /* Sample Code of OS Dependent Functions for FatFs                        */
3. /* (C)ChaN, 2017                                                          */
4. /*------------------------------------------------------------------------*/
7. #include "ff.h"
11. #if FF_USE_LFN == 3    /* Dynamic memory allocation */
13. /*------------------------------------------------------------------------*/
14. /* Allocate a memory block                                                */
15. /*------------------------------------------------------------------------*/
17. void* ff_memalloc (    /* Returns pointer to the allocated memory block (null on not enough core) */
18.     UINT msize        /* Number of bytes to allocate */
19. )
20. {
21.     return malloc(msize);    /* Allocate a new memory block with POSIX API */
22. }
25. /*------------------------------------------------------------------------*/
26. /* Free a memory block                                                    */
27. /*------------------------------------------------------------------------*/
29. void ff_memfree (
30.     void* mblock    /* Pointer to the memory block to free (nothing to do for null) */
31. )
32. {
33.     free(mblock);    /* Free the memory block with POSIX API */
34. }
36. #endif
40. #if FF_FS_REENTRANT    /* Mutal exclusion */
42. /*------------------------------------------------------------------------*/
43. /* Create a Synchronization Object                                        */
44. /*------------------------------------------------------------------------*/
45. /* This function is called in f_mount() function to create a new
46. /  synchronization object for the volume, such as semaphore and mutex.
47. /  When a 0 is returned, the f_mount() function fails with FR_INT_ERR.
48. */
50. //const osMutexDef_t Mutex[FF_VOLUMES];    /* CMSIS-RTOS */
53. int ff_cre_syncobj (    /* 1:Function succeeded, 0:Could not create the sync object */
54.     BYTE vol,            /* Corresponding volume (logical drive number) */
55.     FF_SYNC_t *sobj        /* Pointer to return the created sync object */
56. )
57. {
58.     /* Win32 */
59.     *sobj = CreateMutex(NULL, FALSE, NULL);
60.     return (int)(*sobj != INVALID_HANDLE_VALUE);
62.     /* uITRON */
63. //    T_CSEM csem = {TA_TPRI,1,1};
64. //    *sobj = acre_sem(&csem);
65. //    return (int)(*sobj > 0);
67.     /* uC/OS-II */
68. //    OS_ERR err;
69. //    *sobj = OSMutexCreate(0, &err);
70. //    return (int)(err == OS_NO_ERR);
72.     /* FreeRTOS */
73. //    *sobj = xSemaphoreCreateMutex();
74. //    return (int)(*sobj != NULL);
76.     /* CMSIS-RTOS */
77. //    *sobj = osMutexCreate(Mutex + vol);
78. //    return (int)(*sobj != NULL);
79. }
82. /*------------------------------------------------------------------------*/
83. /* Delete a Synchronization Object                                        */
84. /*------------------------------------------------------------------------*/
85. /* This function is called in f_mount() function to delete a synchronization
86. /  object that created with ff_cre_syncobj() function. When a 0 is returned,
87. /  the f_mount() function fails with FR_INT_ERR.
88. */
90. int ff_del_syncobj (    /* 1:Function succeeded, 0:Could not delete due to an error */
91.     FF_SYNC_t sobj        /* Sync object tied to the logical drive to be deleted */
92. )
93. {
94.     /* Win32 */
95.     return (int)CloseHandle(sobj);
97.     /* uITRON */
98. //    return (int)(del_sem(sobj) == E_OK);
100.     /* uC/OS-II */
101. //    OS_ERR err;
102. //    OSMutexDel(sobj, OS_DEL_ALWAYS, &err);
103. //    return (int)(err == OS_NO_ERR);
105.     /* FreeRTOS */
106. //  vSemaphoreDelete(sobj);
107. //    return 1;
109.     /* CMSIS-RTOS */
110. //    return (int)(osMutexDelete(sobj) == osOK);
111. }
114. /*------------------------------------------------------------------------*/
115. /* Request Grant to Access the Volume                                     */
116. /*------------------------------------------------------------------------*/
117. /* This function is called on entering file functions to lock the volume.
118. /  When a 0 is returned, the file function fails with FR_TIMEOUT.
119. */
121. int ff_req_grant (    /* 1:Got a grant to access the volume, 0:Could not get a grant */
122.     FF_SYNC_t sobj    /* Sync object to wait */
123. )
124. {
125.     /* Win32 */
126.     return (int)(WaitForSingleObject(sobj, FF_FS_TIMEOUT) == WAIT_OBJECT_0);
128.     /* uITRON */
129. //    return (int)(wai_sem(sobj) == E_OK);
131.     /* uC/OS-II */
132. //    OS_ERR err;
133. //    OSMutexPend(sobj, FF_FS_TIMEOUT, &err));
134. //    return (int)(err == OS_NO_ERR);
136.     /* FreeRTOS */
137. //    return (int)(xSemaphoreTake(sobj, FF_FS_TIMEOUT) == pdTRUE);
139.     /* CMSIS-RTOS */
140. //    return (int)(osMutexWait(sobj, FF_FS_TIMEOUT) == osOK);
141. }
144. /*------------------------------------------------------------------------*/
145. /* Release Grant to Access the Volume                                     */
146. /*------------------------------------------------------------------------*/
147. /* This function is called on leaving file functions to unlock the volume.
148. */
150. void ff_rel_grant (
151.     FF_SYNC_t sobj    /* Sync object to be signaled */
152. )
153. {
154.     /* Win32 */
155.     ReleaseMutex(sobj);
157.     /* uITRON */
158. //    sig_sem(sobj);
160.     /* uC/OS-II */
161. //    OSMutexPost(sobj);
163.     /* FreeRTOS */
164. //    xSemaphoreGive(sobj);
166.     /* CMSIS-RTOS */
167. //    osMutexRelease(sobj);
168. }
170. #endif

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