1 /*------------------------------------------------------------------------*/
2 /* Sample Code of OS Dependent Functions for FatFs */
3 /* (C)ChaN, 2018 */
4 /*------------------------------------------------------------------------*/
5
6 #include <stdlib.h>
7 #include <aos/kernel.h>
8 #include "ff.h"
9
10 #if FF_USE_LFN == 3 /* Dynamic memory allocation */
11
12 /*------------------------------------------------------------------------*/
13 /* Allocate a memory block */
14 /*------------------------------------------------------------------------*/
15
ff_memalloc(UINT msize)16 void* ff_memalloc ( /* Returns pointer to the allocated memory block (null if not enough core) */
17 UINT msize /* Number of bytes to allocate */
18 )
19 {
20 return aos_malloc(msize); /* Allocate a new memory block with POSIX API */
21 }
22
23
24 /*------------------------------------------------------------------------*/
25 /* Free a memory block */
26 /*------------------------------------------------------------------------*/
27
ff_memfree(void * mblock)28 void ff_memfree (
29 void* mblock /* Pointer to the memory block to free (nothing to do if null) */
30 )
31 {
32 aos_free(mblock); /* Free the memory block with POSIX API */
33 }
34
35 #endif
36
37
38
39 #if FF_FS_REENTRANT /* Mutal exclusion */
40
41 /*------------------------------------------------------------------------*/
42 /* Create a Synchronization Object */
43 /*------------------------------------------------------------------------*/
44 /* This function is called in f_mount() function to create a new
45 / synchronization object for the volume, such as semaphore and mutex.
46 / When a 0 is returned, the f_mount() function fails with FR_INT_ERR.
47 */
48
ff_cre_syncobj(BYTE vol,FF_SYNC_t * sobj)49 int ff_cre_syncobj ( /* 1:Function succeeded, 0:Could not create the sync object */
50 BYTE vol, /* Corresponding volume (logical drive number) */
51 FF_SYNC_t* sobj /* Pointer to return the created sync object */
52 )
53 {
54 if(aos_mutex_new(sobj) != 0) {
55 return 0;
56 }
57 return 1;
58 }
59
60
61 /*------------------------------------------------------------------------*/
62 /* Delete a Synchronization Object */
63 /*------------------------------------------------------------------------*/
64 /* This function is called in f_mount() function to delete a synchronization
65 / object that created with ff_cre_syncobj() function. When a 0 is returned,
66 / the f_mount() function fails with FR_INT_ERR.
67 */
68
ff_del_syncobj(FF_SYNC_t sobj)69 int ff_del_syncobj ( /* 1:Function succeeded, 0:Could not delete due to an error */
70 FF_SYNC_t sobj /* Sync object tied to the logical drive to be deleted */
71 )
72 {
73 aos_mutex_free(&sobj);
74 return 1;
75 }
76
77
78 /*------------------------------------------------------------------------*/
79 /* Request Grant to Access the Volume */
80 /*------------------------------------------------------------------------*/
81 /* This function is called on entering file functions to lock the volume.
82 / When a 0 is returned, the file function fails with FR_TIMEOUT.
83 */
84
ff_req_grant(FF_SYNC_t sobj)85 int ff_req_grant ( /* 1:Got a grant to access the volume, 0:Could not get a grant */
86 FF_SYNC_t sobj /* Sync object to wait */
87 )
88 {
89 if(aos_mutex_lock(&sobj, FF_FS_TIMEOUT) != 0) {
90 return 0;
91 }
92 return 1;
93 }
94
95
96 /*------------------------------------------------------------------------*/
97 /* Release Grant to Access the Volume */
98 /*------------------------------------------------------------------------*/
99 /* This function is called on leaving file functions to unlock the volume.
100 */
101
ff_rel_grant(FF_SYNC_t sobj)102 void ff_rel_grant (
103 FF_SYNC_t sobj /* Sync object to be signaled */
104 )
105 {
106 aos_mutex_unlock(&sobj);
107 }
108
109 #endif
110
111