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diff --git a/apps/system/hex2bin/fhex2mem.c b/apps/system/hex2bin/fhex2mem.c
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+++ b/apps/system/hex2bin/fhex2mem.c
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+/****************************************************************************
+ * apps/system/fhex2mem.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdio.h>
+#include <assert.h>
+
+#include <nuttx/streams.h>
+#include <apps/hex2bin.h>
+
+#ifdef CONFIG_SYSTEM_HEX2BIN
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name fhex2mem
+ *
+ * Description:
+ *   Read the Intel HEX ASCII data provided on the standard stream
+ *   'instream' and write the binary to memory.
+ *
+ *   If, for example, instream is stdin, then the HEX ASCII data would be
+ *   taken from the console and written to memory.
+ *
+ * Input Parameters:
+ *   instream  - The incoming standard stream from which Intel HEX data
+ *               will be received.
+ *   baseaddr  - The base address of the memory region stream.
+ *   endpaddr  - The end address (plus 1) of the memory region.
+ *   swap      - Controls byte ordering.  See enum hex2bin_swap_e for
+ *               description of the values.
+ *
+ * Returned Value
+ *   Zero (OK) is returned on success; a negated errno value is returned on
+ *   failure.
+ *
+ ****************************************************************************/
+
+int fhex2mem(FAR FILE *instream, uint32_t baseaddr, uint32_t endpaddr,
+             enum hex2bin_swap_e swap)
+{
+  struct lib_stdinstream_s stdinstream;
+  struct lib_memsostream_s memoutstream;
+
+  /* Check memory addresses */
+
+  DEBUGASSERT(instream && endpaddr > baseaddr);
+
+  /* Wrap the file descriptor as raw stream; wrap the memory as a memory
+   * stream.
+   */
+
+  lib_stdinstream(&stdinstream, instream);
+  lib_memsostream(&memoutstream, (FAR char *)baseaddr,
+                  (int)(endpaddr - baseaddr));
+
+  /* And do the deed */
+
+  return hex2bin(&stdinstream.public, &memoutstream.public,
+                 (uint32_t)baseaddr, (uint32_t)endpaddr,
+                 (enum hex2bin_swap_e)swap);
+}
+
+#endif /* CONFIG_SYSTEM_HEX2BIN */