feat(fatfs): add FATFS from esp-idf

Commit ID: 3b16089c

components/fatfs/port/freertos/ffsystem.c

@@ -0,0 +1,108 @@
+/*------------------------------------------------------------------------*/
+/* Sample Code of OS Dependent Functions for FatFs                        */
+/* (C)ChaN, 2017                                                          */
+/*------------------------------------------------------------------------*/
+
+
+#include <string.h>
+#include <stdlib.h>
+#include "ff.h"
+#include "sdkconfig.h"
+#ifdef CONFIG_FATFS_ALLOC_EXTRAM_FIRST
+#include "esp_heap_caps.h"
+#endif
+
+void* ff_memalloc (    /* Returns pointer to the allocated memory block (null on not enough core) */
+    unsigned msize     /* Number of bytes to allocate */
+)
+{
+#ifdef CONFIG_FATFS_ALLOC_EXTRAM_FIRST
+    return heap_caps_malloc_prefer(size, 2, MALLOC_CAP_DEFAULT | MALLOC_CAP_SPIRAM,
+                                            MALLOC_CAP_DEFAULT | MALLOC_CAP_INTERNAL);
+#else
+    return malloc(msize);
+#endif
+}
+
+
+/*------------------------------------------------------------------------*/
+/* Free a memory block                                                    */
+/*------------------------------------------------------------------------*/
+
+void ff_memfree (
+    void* mblock    /* Pointer to the memory block to free (nothing to do for null) */
+)
+{
+    free(mblock);   /* Free the memory block with POSIX API */
+}
+
+
+
+
+#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.
+*/
+
+
+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 */
+)
+{
+    *sobj = xSemaphoreCreateMutex();
+    return (*sobj != NULL) ? 1 : 0;
+}
+
+
+/*------------------------------------------------------------------------*/
+/* 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 */
+)
+{
+    vSemaphoreDelete(sobj);
+    return 1;
+}
+
+
+/*------------------------------------------------------------------------*/
+/* 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 */
+)
+{
+    return (xSemaphoreTake(sobj, FF_FS_TIMEOUT) == pdTRUE) ? 1 : 0;
+}
+
+
+/*------------------------------------------------------------------------*/
+/* 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 */
+)
+{
+    xSemaphoreGive(sobj);
+}
+
+#endif // FF_FS_REENTRANT

components/fatfs/port/linux/ffsystem.c

@@ -0,0 +1,46 @@
+/*------------------------------------------------------------------------*/
+/* OS Dependent Functions for FatFs                                       */
+/* (C)ChaN, 2018                                                          */
+/*------------------------------------------------------------------------*/
+
+
+#include "ff.h"
+#include <stdlib.h>
+
+/* This is the implementation for host-side testing on Linux.
+ * Host-side tests are single threaded, so lock functionality isn't needed.
+ */
+
+void* ff_memalloc(UINT msize)
+{
+    return malloc(msize);
+}
+
+void ff_memfree(void* mblock)
+{
+    free(mblock);
+}
+
+/* 1:Function succeeded, 0:Could not create the sync object */
+int ff_cre_syncobj(BYTE vol, FF_SYNC_t* sobj)
+{
+    *sobj = NULL;
+    return 1;
+}
+
+/* 1:Function succeeded, 0:Could not delete due to an error */
+int ff_del_syncobj(FF_SYNC_t sobj)
+{
+    return 1;
+}
+
+/* 1:Function succeeded, 0:Could not acquire lock */
+int ff_req_grant (FF_SYNC_t sobj)
+{
+    return 1;
+}
+
+void ff_rel_grant (FF_SYNC_t sobj)
+{
+}
+