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53668523 | 1 | /*------------------------------------------------------------------------*/\r |
5630b930 | 2 | /* A Sample Code of User Provided OS Dependent Functions for FatFs */\r |
53668523 L |
3 | /*------------------------------------------------------------------------*/\r |
4 | \r | |
289f6a14 | 5 | #include "ff.h"\r |
53668523 L |
6 | \r |
7 | \r | |
5630b930 | 8 | #if FF_USE_LFN == 3 /* Use dynamic memory allocation */\r |
289f6a14 | 9 | \r |
53668523 | 10 | /*------------------------------------------------------------------------*/\r |
5630b930 | 11 | /* Allocate/Free a Memory Block */\r |
53668523 | 12 | /*------------------------------------------------------------------------*/\r |
53668523 | 13 | \r |
5630b930 L |
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 | |
289f6a14 L |
18 | UINT msize /* Number of bytes to allocate */\r |
19 | )\r | |
20 | {\r | |
5630b930 | 21 | return malloc((size_t)msize); /* Allocate a new memory block */\r |
289f6a14 L |
22 | }\r |
23 | \r | |
24 | \r | |
289f6a14 | 25 | void ff_memfree (\r |
5630b930 | 26 | void* mblock /* Pointer to the memory block to free (no effect if null) */\r |
53668523 L |
27 | )\r |
28 | {\r | |
5630b930 | 29 | free(mblock); /* Free the memory block */\r |
289f6a14 L |
30 | }\r |
31 | \r | |
32 | #endif\r | |
53668523 L |
33 | \r |
34 | \r | |
53668523 | 35 | \r |
53668523 | 36 | \r |
5630b930 | 37 | #if FF_FS_REENTRANT /* Mutal exclusion */\r |
289f6a14 | 38 | /*------------------------------------------------------------------------*/\r |
5630b930 | 39 | /* Definitions of Mutex */\r |
289f6a14 | 40 | /*------------------------------------------------------------------------*/\r |
53668523 | 41 | \r |
5630b930 L |
42 | #define OS_TYPE 0 /* 0:Win32, 1:uITRON4.0, 2:uC/OS-II, 3:FreeRTOS, 4:CMSIS-RTOS */\r |
43 | \r | |
53668523 | 44 | \r |
5630b930 L |
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 | |
53668523 | 78 | \r |
5630b930 L |
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 | |
289f6a14 L |
81 | )\r |
82 | {\r | |
5630b930 L |
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 | |
289f6a14 | 110 | }\r |
53668523 L |
111 | \r |
112 | \r | |
113 | /*------------------------------------------------------------------------*/\r | |
5630b930 | 114 | /* Delete a Mutex */\r |
53668523 | 115 | /*------------------------------------------------------------------------*/\r |
5630b930 L |
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 | |
53668523 L |
118 | */\r |
119 | \r | |
5630b930 L |
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 | |
53668523 L |
122 | )\r |
123 | {\r | |
5630b930 L |
124 | #if OS_TYPE == 0 /* Win32 */\r |
125 | CloseHandle(Mutex[vol]);\r | |
53668523 | 126 | \r |
5630b930 L |
127 | #elif OS_TYPE == 1 /* uITRON */\r |
128 | del_mtx(Mutex[vol]);\r | |
53668523 | 129 | \r |
5630b930 L |
130 | #elif OS_TYPE == 2 /* uC/OS-II */\r |
131 | OS_ERR err;\r | |
53668523 | 132 | \r |
5630b930 | 133 | OSMutexDel(Mutex[vol], OS_DEL_ALWAYS, &err);\r |
53668523 | 134 | \r |
5630b930 L |
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 | |
53668523 L |
142 | }\r |
143 | \r | |
144 | \r | |
53668523 | 145 | /*------------------------------------------------------------------------*/\r |
5630b930 | 146 | /* Request a Grant to Access the Volume */\r |
53668523 | 147 | /*------------------------------------------------------------------------*/\r |
5630b930 | 148 | /* This function is called on enter file functions to lock the volume.\r |
7b78a5a2 | 149 | / When a 0 is returned, the file function fails with FR_TIMEOUT.\r |
53668523 L |
150 | */\r |
151 | \r | |
5630b930 L |
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 | |
53668523 L |
154 | )\r |
155 | {\r | |
5630b930 L |
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 | |
53668523 | 164 | \r |
5630b930 L |
165 | OSMutexPend(Mutex[vol], FF_FS_TIMEOUT, &err));\r |
166 | return (int)(err == OS_NO_ERR);\r | |
53668523 | 167 | \r |
5630b930 L |
168 | #elif OS_TYPE == 3 /* FreeRTOS */\r |
169 | return (int)(xSemaphoreTake(Mutex[vol], FF_FS_TIMEOUT) == pdTRUE);\r | |
53668523 | 170 | \r |
5630b930 L |
171 | #elif OS_TYPE == 4 /* CMSIS-RTOS */\r |
172 | return (int)(osMutexWait(Mutex[vol], FF_FS_TIMEOUT) == osOK);\r | |
53668523 | 173 | \r |
5630b930 | 174 | #endif\r |
53668523 L |
175 | }\r |
176 | \r | |
177 | \r | |
5630b930 | 178 | \r |
53668523 | 179 | /*------------------------------------------------------------------------*/\r |
5630b930 | 180 | /* Release a Grant to Access the Volume */\r |
53668523 | 181 | /*------------------------------------------------------------------------*/\r |
5630b930 | 182 | /* This function is called on leave file functions to unlock the volume.\r |
53668523 L |
183 | */\r |
184 | \r | |
5630b930 L |
185 | void ff_mutex_give (\r |
186 | int vol /* Mutex ID: Volume mutex (0 to FF_VOLUMES - 1) or system mutex (FF_VOLUMES) */\r | |
53668523 L |
187 | )\r |
188 | {\r | |
5630b930 L |
189 | #if OS_TYPE == 0 /* Win32 */\r |
190 | ReleaseMutex(Mutex[vol]);\r | |
53668523 | 191 | \r |
5630b930 L |
192 | #elif OS_TYPE == 1 /* uITRON */\r |
193 | unl_mtx(Mutex[vol]);\r | |
53668523 | 194 | \r |
5630b930 L |
195 | #elif OS_TYPE == 2 /* uC/OS-II */\r |
196 | OSMutexPost(Mutex[vol]);\r | |
53668523 | 197 | \r |
5630b930 L |
198 | #elif OS_TYPE == 3 /* FreeRTOS */\r |
199 | xSemaphoreGive(Mutex[vol]);\r | |
53668523 | 200 | \r |
5630b930 L |
201 | #elif OS_TYPE == 4 /* CMSIS-RTOS */\r |
202 | osMutexRelease(Mutex[vol]);\r | |
53668523 L |
203 | \r |
204 | #endif\r | |
5630b930 L |
205 | }\r |
206 | \r | |
207 | #endif /* FF_FS_REENTRANT */\r | |
289f6a14 | 208 | \r |