source: UsbWattMeter/trunk/fatfs/option/syscall.c@ 164

Last change on this file since 164 was 164, checked in by coas-nagasima, 6 years ago

TOPPERS/ECNLサンプルアプリ「USB充電器電力計」を追加

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  • Property svn:keywords set to Id
  • Property svn:mime-type set to text/x-csrc
File size: 4.5 KB
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1/*------------------------------------------------------------------------*/
2/* Sample code of OS dependent controls for FatFs */
3/* (C)ChaN, 2014 */
4/*------------------------------------------------------------------------*/
5
6
7#include "../ff.h"
8#include <kernel.h>
9
10
11#if _FS_REENTRANT
12/*------------------------------------------------------------------------*/
13/* Create a Synchronization Object
14/*------------------------------------------------------------------------*/
15/* This function is called in f_mount() function to create a new
16/ synchronization object, such as semaphore and mutex. When a 0 is returned,
17/ the f_mount() function fails with FR_INT_ERR.
18*/
19
20int ff_cre_syncobj ( /* !=0:Function succeeded, ==0:Could not create due to any error */
21 BYTE vol, /* Corresponding logical drive being processed */
22 _SYNC_t *sobj /* Pointer to return the created sync object */
23)
24{
25 int ret;
26
27
28 *sobj = CreateMutex(NULL, FALSE, NULL); /* Win32 */
29 ret = (int)(*sobj != INVALID_HANDLE_VALUE);
30
31// *sobj = SyncObjects[vol]; /* uITRON (give a static created sync object) */
32// ret = 1; /* The initial value of the semaphore must be 1. */
33
34// *sobj = OSMutexCreate(0, &err); /* uC/OS-II */
35// ret = (int)(err == OS_NO_ERR);
36
37// *sobj = xSemaphoreCreateMutex(); /* FreeRTOS */
38// ret = (int)(*sobj != NULL);
39
40 return ret;
41}
42
43
44
45/*------------------------------------------------------------------------*/
46/* Delete a Synchronization Object */
47/*------------------------------------------------------------------------*/
48/* This function is called in f_mount() function to delete a synchronization
49/ object that created with ff_cre_syncobj function. When a 0 is returned,
50/ the f_mount() function fails with FR_INT_ERR.
51*/
52
53int ff_del_syncobj ( /* !=0:Function succeeded, ==0:Could not delete due to any error */
54 _SYNC_t sobj /* Sync object tied to the logical drive to be deleted */
55)
56{
57 int ret;
58
59
60 ret = CloseHandle(sobj); /* Win32 */
61
62// ret = 1; /* uITRON (nothing to do) */
63
64// OSMutexDel(sobj, OS_DEL_ALWAYS, &err); /* uC/OS-II */
65// ret = (int)(err == OS_NO_ERR);
66
67// vSemaphoreDelete(sobj); /* FreeRTOS */
68// ret = 1;
69
70 return ret;
71}
72
73
74
75/*------------------------------------------------------------------------*/
76/* Request Grant to Access the Volume */
77/*------------------------------------------------------------------------*/
78/* This function is called on entering file functions to lock the volume.
79/ When a 0 is returned, the file function fails with FR_TIMEOUT.
80*/
81
82int ff_req_grant ( /* 1:Got a grant to access the volume, 0:Could not get a grant */
83 _SYNC_t sobj /* Sync object to wait */
84)
85{
86 int ret;
87
88 ret = (int)(WaitForSingleObject(sobj, _FS_TIMEOUT) == WAIT_OBJECT_0); /* Win32 */
89
90// ret = (int)(wai_sem(sobj) == E_OK); /* uITRON */
91
92// OSMutexPend(sobj, _FS_TIMEOUT, &err)); /* uC/OS-II */
93// ret = (int)(err == OS_NO_ERR);
94
95// ret = (int)(xSemaphoreTake(sobj, _FS_TIMEOUT) == pdTRUE); /* FreeRTOS */
96
97 return ret;
98}
99
100
101
102/*------------------------------------------------------------------------*/
103/* Release Grant to Access the Volume */
104/*------------------------------------------------------------------------*/
105/* This function is called on leaving file functions to unlock the volume.
106*/
107
108void ff_rel_grant (
109 _SYNC_t sobj /* Sync object to be signaled */
110)
111{
112 ReleaseMutex(sobj); /* Win32 */
113
114// sig_sem(sobj); /* uITRON */
115
116// OSMutexPost(sobj); /* uC/OS-II */
117
118// xSemaphoreGive(sobj); /* FreeRTOS */
119}
120
121#endif
122
123
124
125
126#if _USE_LFN == 3 /* LFN with a working buffer on the heap */
127/*------------------------------------------------------------------------*/
128/* Allocate a memory block */
129/*------------------------------------------------------------------------*/
130/* If a NULL is returned, the file function fails with FR_NOT_ENOUGH_CORE.
131*/
132
133void* ff_memalloc ( /* Returns pointer to the allocated memory block */
134 UINT msize /* Number of bytes to allocate */
135)
136{
137 return malloc(msize); /* Allocate a new memory block with POSIX API */
138}
139
140
141/*------------------------------------------------------------------------*/
142/* Free a memory block */
143/*------------------------------------------------------------------------*/
144
145void ff_memfree (
146 void* mblock /* Pointer to the memory block to free */
147)
148{
149 free(mblock); /* Discard the memory block with POSIX API */
150}
151
152#endif
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