From dd38d907244bc0e483c3d760f2ba464a394ec229 Mon Sep 17 00:00:00 2001
From: Dave Hylands
Date: Tue, 11 Mar 2014 23:55:41 -0700
Subject: Initial checkin with STM HAL

This compiles and links, but hasn't been tested on a board
yet and even if it was run, it doesn't currently do anything.
---
 stmhal/fatfs/src/option/syscall.c | 119 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 stmhal/fatfs/src/option/syscall.c

(limited to 'stmhal/fatfs/src/option/syscall.c')

diff --git a/stmhal/fatfs/src/option/syscall.c b/stmhal/fatfs/src/option/syscall.c
new file mode 100644
index 000000000..174e71e2f
--- /dev/null
+++ b/stmhal/fatfs/src/option/syscall.c
@@ -0,0 +1,119 @@
+/*------------------------------------------------------------------------*/
+/* Sample code of OS dependent controls for FatFs R0.10                   */
+/* (C)ChaN, 2013                                                          */
+/*------------------------------------------------------------------------*/
+
+#include <stdlib.h>		/* ANSI memory controls */
+#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 zero is
+ returned, the f_mount function fails with FR_INT_ERR.
+*/
+
+int ff_cre_syncobj (	/* TRUE:Function succeeded, FALSE: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;
+  
+  osSemaphoreDef(SEM);
+  *sobj = osSemaphoreCreate(osSemaphore(SEM), 1);		
+  ret = (*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 zero is
+/  returned, the f_mount function fails with FR_INT_ERR.
+*/
+
+int ff_del_syncobj (	/* TRUE:Function succeeded, FALSE:Could not delete due to any error */
+	_SYNC_t sobj		/* Sync object tied to the logical drive to be deleted */
+)
+{
+  osSemaphoreDelete (sobj);
+  return 1;
+}
+
+
+
+/*------------------------------------------------------------------------*/
+/* Request Grant to Access the Volume                                     */
+/*------------------------------------------------------------------------*/
+/* This function is called on entering file functions to lock the volume.
+/  When a zero is returned, the file function fails with FR_TIMEOUT.
+*/
+
+int ff_req_grant (	/* TRUE:Got a grant to access the volume, FALSE:Could not get a grant */
+	_SYNC_t sobj	/* Sync object to wait */
+)
+{
+  int ret = 0;
+  
+  if(osSemaphoreWait(sobj, _FS_TIMEOUT) == osOK)
+  {
+    ret = 1;
+  }
+  
+  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 */
+)
+{
+  osSemaphoreRelease(sobj);
+}
+
+#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 size		/* Number of bytes to allocate */
+)
+{
+  return malloc(size);
+}
+
+
+/*------------------------------------------------------------------------*/
+/* Free a memory block                                                    */
+/*------------------------------------------------------------------------*/
+
+void ff_memfree(
+	void* mblock	/* Pointer to the memory block to free */
+)
+{
+  free(mblock);
+}
+
+#endif
-- 
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