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| author | Damien George <damien.p.george@gmail.com> | 2014-12-20 20:32:27 +0000 |
|---|---|---|
| committer | Damien George <damien.p.george@gmail.com> | 2014-12-27 17:36:16 +0000 |
| commit | c546b66bab04426a423af21eabb84de5707b29c4 (patch) | |
| tree | dd8e2500bb654772522bbc27853792f92aecdcab /lib/fatfs/option/syscall.c | |
| parent | 83204f34067b765293b791563bdd5756bdfc5aa4 (diff) | |
| download | micropython-c546b66bab04426a423af21eabb84de5707b29c4.tar.gz micropython-c546b66bab04426a423af21eabb84de5707b29c4.zip | |
lib/fatfs: Upgrade to new FatFs driver, put in lib/ for common use.
Patches to fatfs for our use will follow.
Diffstat (limited to 'lib/fatfs/option/syscall.c')
| -rw-r--r-- | lib/fatfs/option/syscall.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/lib/fatfs/option/syscall.c b/lib/fatfs/option/syscall.c new file mode 100644 index 0000000000..2036cb772a --- /dev/null +++ b/lib/fatfs/option/syscall.c @@ -0,0 +1,151 @@ +/*------------------------------------------------------------------------*/
+/* Sample code of OS dependent controls for FatFs */
+/* (C)ChaN, 2014 */
+/*------------------------------------------------------------------------*/
+
+
+#include "../ff.h"
+
+
+#if _FS_REENTRANT
+/*------------------------------------------------------------------------*/
+/* Create a Synchronization Object
+/*------------------------------------------------------------------------*/
+/* This function is called in f_mount() function to create a new
+/ synchronization object, such as semaphore and mutex. When a 0 is returned,
+/ the f_mount() function fails with FR_INT_ERR.
+*/
+
+int ff_cre_syncobj ( /* !=0:Function succeeded, ==0:Could not create due to any error */
+ BYTE vol, /* Corresponding logical drive being processed */
+ _SYNC_t *sobj /* Pointer to return the created sync object */
+)
+{
+ int ret;
+
+
+ *sobj = CreateMutex(NULL, FALSE, NULL); /* Win32 */
+ ret = (int)(*sobj != INVALID_HANDLE_VALUE);
+
+// *sobj = SyncObjects[vol]; /* uITRON (give a static created sync object) */
+// ret = 1; /* The initial value of the semaphore must be 1. */
+
+// *sobj = OSMutexCreate(0, &err); /* uC/OS-II */
+// ret = (int)(err == OS_NO_ERR);
+
+// *sobj = xSemaphoreCreateMutex(); /* FreeRTOS */
+// ret = (int)(*sobj != NULL);
+
+ return ret;
+}
+
+
+
+/*------------------------------------------------------------------------*/
+/* Delete a Synchronization Object */
+/*------------------------------------------------------------------------*/
+/* This function is called in f_mount() function to delete a synchronization
+/ object that created with ff_cre_syncobj function. When a 0 is returned,
+/ the f_mount() function fails with FR_INT_ERR.
+*/
+
+int ff_del_syncobj ( /* !=0:Function succeeded, ==0:Could not delete due to any error */
+ _SYNC_t sobj /* Sync object tied to the logical drive to be deleted */
+)
+{
+ int ret;
+
+
+ ret = CloseHandle(sobj); /* Win32 */
+
+// ret = 1; /* uITRON (nothing to do) */
+
+// OSMutexDel(sobj, OS_DEL_ALWAYS, &err); /* uC/OS-II */
+// ret = (int)(err == OS_NO_ERR);
+
+// vSemaphoreDelete(sobj); /* FreeRTOS */
+// ret = 1;
+
+ return ret;
+}
+
+
+
+/*------------------------------------------------------------------------*/
+/* Request Grant to Access the Volume */
+/*------------------------------------------------------------------------*/
+/* This function is called on entering file functions to lock the volume.
+/ When a 0 is returned, the file function fails with FR_TIMEOUT.
+*/
+
+int ff_req_grant ( /* 1:Got a grant to access the volume, 0:Could not get a grant */
+ _SYNC_t sobj /* Sync object to wait */
+)
+{
+ int ret;
+
+ ret = (int)(WaitForSingleObject(sobj, _FS_TIMEOUT) == WAIT_OBJECT_0); /* Win32 */
+
+// ret = (int)(wai_sem(sobj) == E_OK); /* uITRON */
+
+// OSMutexPend(sobj, _FS_TIMEOUT, &err)); /* uC/OS-II */
+// ret = (int)(err == OS_NO_ERR);
+
+// ret = (int)(xSemaphoreTake(sobj, _FS_TIMEOUT) == pdTRUE); /* FreeRTOS */
+
+ return ret;
+}
+
+
+
+/*------------------------------------------------------------------------*/
+/* Release Grant to Access the Volume */
+/*------------------------------------------------------------------------*/
+/* This function is called on leaving file functions to unlock the volume.
+*/
+
+void ff_rel_grant (
+ _SYNC_t sobj /* Sync object to be signaled */
+)
+{
+ ReleaseMutex(sobj); /* Win32 */
+
+// sig_sem(sobj); /* uITRON */
+
+// OSMutexPost(sobj); /* uC/OS-II */
+
+// xSemaphoreGive(sobj); /* FreeRTOS */
+}
+
+#endif
+
+
+
+
+#if _USE_LFN == 3 /* LFN with a working buffer on the heap */
+/*------------------------------------------------------------------------*/
+/* Allocate a memory block */
+/*------------------------------------------------------------------------*/
+/* If a NULL is returned, the file function fails with FR_NOT_ENOUGH_CORE.
+*/
+
+void* ff_memalloc ( /* Returns pointer to the allocated memory block */
+ UINT msize /* Number of bytes to allocate */
+)
+{
+ return malloc(msize); /* Allocate a new memory block with POSIX API */
+}
+
+
+/*------------------------------------------------------------------------*/
+/* Free a memory block */
+/*------------------------------------------------------------------------*/
+
+void ff_memfree (
+ void* mblock /* Pointer to the memory block to free */
+)
+{
+ free(mblock); /* Discard the memory block with POSIX API */
+}
+
+#endif
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