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1 | /*------------------------------------------------------------------------*/\r | |
2 | /* A Sample Code of User Provided OS Dependent Functions for FatFs */\r | |
3 | /*------------------------------------------------------------------------*/\r | |
4 | \r | |
5 | #include "ff.h"\r | |
6 | \r | |
7 | \r | |
8 | #if FF_USE_LFN == 3 /* Use dynamic memory allocation */\r | |
9 | \r | |
10 | /*------------------------------------------------------------------------*/\r | |
11 | /* Allocate/Free a Memory Block */\r | |
12 | /*------------------------------------------------------------------------*/\r | |
13 | \r | |
14 | #include <stdlib.h> /* with POSIX API */\r | |
15 | \r | |
16 | \r | |
17 | void* ff_memalloc ( /* Returns pointer to the allocated memory block (null if not enough core) */\r | |
18 | UINT msize /* Number of bytes to allocate */\r | |
19 | )\r | |
20 | {\r | |
21 | return malloc((size_t)msize); /* Allocate a new memory block */\r | |
22 | }\r | |
23 | \r | |
24 | \r | |
25 | void ff_memfree (\r | |
26 | void* mblock /* Pointer to the memory block to free (no effect if null) */\r | |
27 | )\r | |
28 | {\r | |
29 | free(mblock); /* Free the memory block */\r | |
30 | }\r | |
31 | \r | |
32 | #endif\r | |
33 | \r | |
34 | \r | |
35 | \r | |
36 | \r | |
37 | #if FF_FS_REENTRANT /* Mutal exclusion */\r | |
38 | /*------------------------------------------------------------------------*/\r | |
39 | /* Definitions of Mutex */\r | |
40 | /*------------------------------------------------------------------------*/\r | |
41 | \r | |
42 | #define OS_TYPE 0 /* 0:Win32, 1:uITRON4.0, 2:uC/OS-II, 3:FreeRTOS, 4:CMSIS-RTOS */\r | |
43 | \r | |
44 | \r | |
45 | #if OS_TYPE == 0 /* Win32 */\r | |
46 | #include <windows.h>\r | |
47 | static HANDLE Mutex[FF_VOLUMES + 1]; /* Table of mutex handle */\r | |
48 | \r | |
49 | #elif OS_TYPE == 1 /* uITRON */\r | |
50 | #include "itron.h"\r | |
51 | #include "kernel.h"\r | |
52 | static mtxid Mutex[FF_VOLUMES + 1]; /* Table of mutex ID */\r | |
53 | \r | |
54 | #elif OS_TYPE == 2 /* uc/OS-II */\r | |
55 | #include "includes.h"\r | |
56 | static OS_EVENT *Mutex[FF_VOLUMES + 1]; /* Table of mutex pinter */\r | |
57 | \r | |
58 | #elif OS_TYPE == 3 /* FreeRTOS */\r | |
59 | #include "FreeRTOS.h"\r | |
60 | #include "semphr.h"\r | |
61 | static SemaphoreHandle_t Mutex[FF_VOLUMES + 1]; /* Table of mutex handle */\r | |
62 | \r | |
63 | #elif OS_TYPE == 4 /* CMSIS-RTOS */\r | |
64 | #include "cmsis_os.h"\r | |
65 | static osMutexId Mutex[FF_VOLUMES + 1]; /* Table of mutex ID */\r | |
66 | \r | |
67 | #endif\r | |
68 | \r | |
69 | \r | |
70 | \r | |
71 | /*------------------------------------------------------------------------*/\r | |
72 | /* Create a Mutex */\r | |
73 | /*------------------------------------------------------------------------*/\r | |
74 | /* This function is called in f_mount function to create a new mutex\r | |
75 | / or semaphore for the volume. When a 0 is returned, the f_mount function\r | |
76 | / fails with FR_INT_ERR.\r | |
77 | */\r | |
78 | \r | |
79 | int ff_mutex_create ( /* Returns 1:Function succeeded or 0:Could not create the mutex */\r | |
80 | int vol /* Mutex ID: Volume mutex (0 to FF_VOLUMES - 1) or system mutex (FF_VOLUMES) */\r | |
81 | )\r | |
82 | {\r | |
83 | #if OS_TYPE == 0 /* Win32 */\r | |
84 | Mutex[vol] = CreateMutex(NULL, FALSE, NULL);\r | |
85 | return (int)(Mutex[vol] != INVALID_HANDLE_VALUE);\r | |
86 | \r | |
87 | #elif OS_TYPE == 1 /* uITRON */\r | |
88 | T_CMTX cmtx = {TA_TPRI,1};\r | |
89 | \r | |
90 | Mutex[vol] = acre_mtx(&cmtx);\r | |
91 | return (int)(Mutex[vol] > 0);\r | |
92 | \r | |
93 | #elif OS_TYPE == 2 /* uC/OS-II */\r | |
94 | OS_ERR err;\r | |
95 | \r | |
96 | Mutex[vol] = OSMutexCreate(0, &err);\r | |
97 | return (int)(err == OS_NO_ERR);\r | |
98 | \r | |
99 | #elif OS_TYPE == 3 /* FreeRTOS */\r | |
100 | Mutex[vol] = xSemaphoreCreateMutex();\r | |
101 | return (int)(Mutex[vol] != NULL);\r | |
102 | \r | |
103 | #elif OS_TYPE == 4 /* CMSIS-RTOS */\r | |
104 | osMutexDef(cmsis_os_mutex);\r | |
105 | \r | |
106 | Mutex[vol] = osMutexCreate(osMutex(cmsis_os_mutex));\r | |
107 | return (int)(Mutex[vol] != NULL);\r | |
108 | \r | |
109 | #endif\r | |
110 | }\r | |
111 | \r | |
112 | \r | |
113 | /*------------------------------------------------------------------------*/\r | |
114 | /* Delete a Mutex */\r | |
115 | /*------------------------------------------------------------------------*/\r | |
116 | /* This function is called in f_mount function to delete a mutex or\r | |
117 | / semaphore of the volume created with ff_mutex_create function.\r | |
118 | */\r | |
119 | \r | |
120 | void ff_mutex_delete ( /* Returns 1:Function succeeded or 0:Could not delete due to an error */\r | |
121 | int vol /* Mutex ID: Volume mutex (0 to FF_VOLUMES - 1) or system mutex (FF_VOLUMES) */\r | |
122 | )\r | |
123 | {\r | |
124 | #if OS_TYPE == 0 /* Win32 */\r | |
125 | CloseHandle(Mutex[vol]);\r | |
126 | \r | |
127 | #elif OS_TYPE == 1 /* uITRON */\r | |
128 | del_mtx(Mutex[vol]);\r | |
129 | \r | |
130 | #elif OS_TYPE == 2 /* uC/OS-II */\r | |
131 | OS_ERR err;\r | |
132 | \r | |
133 | OSMutexDel(Mutex[vol], OS_DEL_ALWAYS, &err);\r | |
134 | \r | |
135 | #elif OS_TYPE == 3 /* FreeRTOS */\r | |
136 | vSemaphoreDelete(Mutex[vol]);\r | |
137 | \r | |
138 | #elif OS_TYPE == 4 /* CMSIS-RTOS */\r | |
139 | osMutexDelete(Mutex[vol]);\r | |
140 | \r | |
141 | #endif\r | |
142 | }\r | |
143 | \r | |
144 | \r | |
145 | /*------------------------------------------------------------------------*/\r | |
146 | /* Request a Grant to Access the Volume */\r | |
147 | /*------------------------------------------------------------------------*/\r | |
148 | /* This function is called on enter file functions to lock the volume.\r | |
149 | / When a 0 is returned, the file function fails with FR_TIMEOUT.\r | |
150 | */\r | |
151 | \r | |
152 | int ff_mutex_take ( /* Returns 1:Succeeded or 0:Timeout */\r | |
153 | int vol /* Mutex ID: Volume mutex (0 to FF_VOLUMES - 1) or system mutex (FF_VOLUMES) */\r | |
154 | )\r | |
155 | {\r | |
156 | #if OS_TYPE == 0 /* Win32 */\r | |
157 | return (int)(WaitForSingleObject(Mutex[vol], FF_FS_TIMEOUT) == WAIT_OBJECT_0);\r | |
158 | \r | |
159 | #elif OS_TYPE == 1 /* uITRON */\r | |
160 | return (int)(tloc_mtx(Mutex[vol], FF_FS_TIMEOUT) == E_OK);\r | |
161 | \r | |
162 | #elif OS_TYPE == 2 /* uC/OS-II */\r | |
163 | OS_ERR err;\r | |
164 | \r | |
165 | OSMutexPend(Mutex[vol], FF_FS_TIMEOUT, &err));\r | |
166 | return (int)(err == OS_NO_ERR);\r | |
167 | \r | |
168 | #elif OS_TYPE == 3 /* FreeRTOS */\r | |
169 | return (int)(xSemaphoreTake(Mutex[vol], FF_FS_TIMEOUT) == pdTRUE);\r | |
170 | \r | |
171 | #elif OS_TYPE == 4 /* CMSIS-RTOS */\r | |
172 | return (int)(osMutexWait(Mutex[vol], FF_FS_TIMEOUT) == osOK);\r | |
173 | \r | |
174 | #endif\r | |
175 | }\r | |
176 | \r | |
177 | \r | |
178 | \r | |
179 | /*------------------------------------------------------------------------*/\r | |
180 | /* Release a Grant to Access the Volume */\r | |
181 | /*------------------------------------------------------------------------*/\r | |
182 | /* This function is called on leave file functions to unlock the volume.\r | |
183 | */\r | |
184 | \r | |
185 | void ff_mutex_give (\r | |
186 | int vol /* Mutex ID: Volume mutex (0 to FF_VOLUMES - 1) or system mutex (FF_VOLUMES) */\r | |
187 | )\r | |
188 | {\r | |
189 | #if OS_TYPE == 0 /* Win32 */\r | |
190 | ReleaseMutex(Mutex[vol]);\r | |
191 | \r | |
192 | #elif OS_TYPE == 1 /* uITRON */\r | |
193 | unl_mtx(Mutex[vol]);\r | |
194 | \r | |
195 | #elif OS_TYPE == 2 /* uC/OS-II */\r | |
196 | OSMutexPost(Mutex[vol]);\r | |
197 | \r | |
198 | #elif OS_TYPE == 3 /* FreeRTOS */\r | |
199 | xSemaphoreGive(Mutex[vol]);\r | |
200 | \r | |
201 | #elif OS_TYPE == 4 /* CMSIS-RTOS */\r | |
202 | osMutexRelease(Mutex[vol]);\r | |
203 | \r | |
204 | #endif\r | |
205 | }\r | |
206 | \r | |
207 | #endif /* FF_FS_REENTRANT */\r | |
208 | \r |