1 files changed, 68 insertions, 0 deletions
diff --git a/usb/device/massstorage/MSDIOFifo.c b/usb/device/massstorage/MSDIOFifo.c
new file mode 100644
index 0000000..03f09a6
--- /dev/null
+++ b/usb/device/massstorage/MSDIOFifo.c
@@ -0,0 +1,68 @@
+/* ----------------------------------------------------------------------------
+ *         ATMEL Microcontroller Software Support 
+ * ----------------------------------------------------------------------------
+ * Copyright (c) 2008, Atmel Corporation
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the disclaimer below.
+ *
+ * Atmel's name may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ----------------------------------------------------------------------------
+ */
+
+//------------------------------------------------------------------------------
+//         Headers
+//------------------------------------------------------------------------------
+
+#include "MSDIOFifo.h"
+
+//------------------------------------------------------------------------------
+//         Internal variables
+//------------------------------------------------------------------------------
+
+
+//------------------------------------------------------------------------------
+//         Exported functions
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+//! \brief  Initializes a MSDIOFifo instance.
+//! \param  pFifo        Pointer to the MSDIOFifo instance to initialize
+//! \param  pBuffer      Pointer to a buffer used for read/write operation and
+//!                      which must be blockSize bytes aligned.
+//! \param  bufferSize   Total size of the buffer in bytes
+//------------------------------------------------------------------------------
+void MSDIOFifo_Init(MSDIOFifo *pFifo,
+                    void * pBuffer, unsigned short bufferSize)
+{
+    pFifo->pBuffer = pBuffer;
+    pFifo->bufferSize = bufferSize;
+
+    pFifo->inputNdx = 0;
+    pFifo->outputNdx = 0;
+    pFifo->inputTotal = 0;
+    pFifo->outputTotal = 0;
+
+    pFifo->inputState = MSDIO_IDLE;
+    pFifo->outputState = MSDIO_IDLE;
+
+    pFifo->fullCnt = 0;
+    pFifo->nullCnt = 0;
+}