diff options
Diffstat (limited to '3rdparty/fatfs-0.13/source/ffsystem.c')
| -rw-r--r-- | 3rdparty/fatfs-0.13/source/ffsystem.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/3rdparty/fatfs-0.13/source/ffsystem.c b/3rdparty/fatfs-0.13/source/ffsystem.c new file mode 100644 index 00000000..59a796cb --- /dev/null +++ b/3rdparty/fatfs-0.13/source/ffsystem.c @@ -0,0 +1,171 @@ +/*------------------------------------------------------------------------*/ +/* Sample code of OS dependent controls for FatFs */ +/* (C)ChaN, 2017 */ +/*------------------------------------------------------------------------*/ + + +#include "ff.h" + + + +#if FF_USE_LFN == 3 /* Dynamic memory allocation */ + +/*------------------------------------------------------------------------*/ +/* Allocate a memory block */ +/*------------------------------------------------------------------------*/ + +void* ff_memalloc ( /* Returns pointer to the allocated memory block (null on not enough core) */ + 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); /* Free the memory block with POSIX API */ +} + +#endif + + + +#if FF_FS_REENTRANT /* Mutal exclusion */ + +/*------------------------------------------------------------------------*/ +/* Create a Synchronization Object +/*------------------------------------------------------------------------*/ +/* This function is called in f_mount() function to create a new +/ synchronization object for the volume, such as semaphore and mutex. +/ When a 0 is returned, the f_mount() function fails with FR_INT_ERR. +*/ + +//const osMutexDef_t Mutex[FF_VOLUMES]; /* CMSIS-RTOS */ + + +int ff_cre_syncobj ( /* 1:Function succeeded, 0:Could not create the sync object */ + BYTE vol, /* Corresponding volume (logical drive number) */ + FF_SYNC_t *sobj /* Pointer to return the created sync object */ +) +{ + /* Win32 */ + *sobj = CreateMutex(NULL, FALSE, NULL); + return (int)(*sobj != INVALID_HANDLE_VALUE); + + /* uITRON */ +// T_CSEM csem = {TA_TPRI,1,1}; +// *sobj = acre_sem(&csem); +// return (int)(*sobj > 0); + + /* uC/OS-II */ +// OS_ERR err; +// *sobj = OSMutexCreate(0, &err); +// return (int)(err == OS_NO_ERR); + + /* FreeRTOS */ +// *sobj = xSemaphoreCreateMutex(); +// return (int)(*sobj != NULL); + + /* CMSIS-RTOS */ +// *sobj = osMutexCreate(Mutex + vol); +// return (int)(*sobj != NULL); +} + + +/*------------------------------------------------------------------------*/ +/* 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 ( /* 1:Function succeeded, 0:Could not delete due to an error */ + FF_SYNC_t sobj /* Sync object tied to the logical drive to be deleted */ +) +{ + /* Win32 */ + return (int)CloseHandle(sobj); + + /* uITRON */ +// return (int)(del_sem(sobj) == E_OK); + + /* uC/OS-II */ +// OS_ERR err; +// OSMutexDel(sobj, OS_DEL_ALWAYS, &err); +// return (int)(err == OS_NO_ERR); + + /* FreeRTOS */ +// vSemaphoreDelete(sobj); +// return 1; + + /* CMSIS-RTOS */ +// return (int)(osMutexDelete(sobj) == osOK); +} + + +/*------------------------------------------------------------------------*/ +/* 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 */ + FF_SYNC_t sobj /* Sync object to wait */ +) +{ + /* Win32 */ + return (int)(WaitForSingleObject(sobj, FF_FS_TIMEOUT) == WAIT_OBJECT_0); + + /* uITRON */ +// return (int)(wai_sem(sobj) == E_OK); + + /* uC/OS-II */ +// OS_ERR err; +// OSMutexPend(sobj, FF_FS_TIMEOUT, &err)); +// return (int)(err == OS_NO_ERR); + + /* FreeRTOS */ +// return (int)(xSemaphoreTake(sobj, FF_FS_TIMEOUT) == pdTRUE); + + /* CMSIS-RTOS */ +// return (int)(osMutexWait(sobj, FF_FS_TIMEOUT) == osOK); +} + + +/*------------------------------------------------------------------------*/ +/* Release Grant to Access the Volume */ +/*------------------------------------------------------------------------*/ +/* This function is called on leaving file functions to unlock the volume. +*/ + +void ff_rel_grant ( + FF_SYNC_t sobj /* Sync object to be signaled */ +) +{ + /* Win32 */ + ReleaseMutex(sobj); + + /* uITRON */ +// sig_sem(sobj); + + /* uC/OS-II */ +// OSMutexPost(sobj); + + /* FreeRTOS */ +// xSemaphoreGive(sobj); + + /* CMSIS-RTOS */ +// osMutexRelease(sobj); +} + +#endif + |