diff --git a/Documentation/NuttXCCodingStandard.html b/Documentation/NuttXCCodingStandard.html
index 98c878a2964..f867fb3782a 100644
--- a/Documentation/NuttXCCodingStandard.html
+++ b/Documentation/NuttXCCodingStandard.html
@@ -12,7 +12,7 @@
       <h1><big><font color="#3c34ec">
         <i>NuttX C Coding Standard</i>
       </font></big></h1>
-      <p>Last Updated: April 17, 2017</p>
+      <p>Last Updated: April 18, 2017</p>
     </td>
   </tr>
 </table>
@@ -1292,13 +1292,18 @@ typedef int myinteger_t;
     <b>No un-named structures</b>.
     All structures must be named, even if they are part of a type definition.
     That is, a structure name must follow the reserved word <code>struct</code> in all structure definitions.
-    The exception to this rule is for structures that are defined within another union or structure.  In those cases, the structure name should always be omitted.
+    The exception to this rule is for structures that are defined within another union or structure (discouraged).  In those cases, the structure name should always be omitted.
+  </li>
+  <li>
+    <b>Structured defined with structures discouraged</b>.
+    Fields within a structure may be another structure that is defined only with the scope of the containing structure.
+    This practice is acceptable, but discouraged.
   </li>
   <li>
     <b>No un-named structure fields</b>.
     Structure may contain other structures as fields.
     This this case, the structure field must be named.
-    C11 permits such un-named structure fields within structure.
+    C11 permits such un-named structure fields within a structure.
     NuttX generally follows C89 and all code outside of architecture specific directories must be compatible with C89.
   <li>
     <b>No structure definitions within Type Definition</b>.
@@ -1409,11 +1414,16 @@ struct abc_s
   };                 /* Un-named structure field */
   ...
 };
+
 </ul></pre></font>
 </td></tr>
 <tr><td bgcolor="white">
-<p><font color="green"><b>Correct</b></p>
-<ul><pre>
+<ul>
+<font color="green">
+<p>
+  <b>Correct</b>
+</p>
+<pre>
 struct xyz_info_s
 {
   ...
@@ -1423,10 +1433,20 @@ struct xyz_info_s
   ...
 };
 </pre>
-<font color="blue"><pre>
+<font color="blue">
+<p>
+  <b>Discouraged</b>
+</p>
+<pre>
 typedef struct xyz_info_s xzy_info_t;
 </pre>
-<p>(The use of typedef'ed structures is acceptable but discouraged)</p></font>
+<p>
+  The use of typedef'ed structures is acceptable but discouraged.
+</p>
+</font>
+<p>
+  <b>Correct</b>
+</p>
 <pre>
 struct xyz_info_s
 {
@@ -1436,7 +1456,12 @@ struct xyz_info_s
   uint8_t bitc : 1,  /* Bit C */
   ...
 };
-
+</pre>
+<font color="blue">
+<p>
+  <b>Discouraged</b>
+</p>
+<pre>
 struct abc_s
 {
   ...
@@ -1448,6 +1473,26 @@ struct abc_s
   } abc;
   ...
 };
+</pre>
+<p>
+  The use of structures defined within other structures is acceptable provided that they define named fields.
+  The general practice of defining a structure within the scope of another structure, however, is still but discouraged in any case.
+  The following is preferred:
+</p>
+</font>
+<p>
+  <b>Preferred</b>
+</p>
+<pre>
+struct abc_s
+{
+  ...
+  int a;             /* Value A */
+  int b;             /* Value B */
+  int c;             /* Value C */
+  ...
+};
+
 </ul></pre></font>
 </td></tr>
 </table></center>
@@ -1476,7 +1521,7 @@ union xyz_union_u  /* All unions must be named */
 <font color="blue"><pre>
 typedef union xyz_union_u xzy_union_t;
 </pre>
-<p>(The use of typedef'ed unions is acceptable but discouraged)</p></font>
+<p>The use of typedef'ed unions is acceptable but discouraged.</p></font>
 <pre>
 struct xyz_info_s
 {
@@ -1489,6 +1534,7 @@ struct xyz_info_s
   } u;             /* All union fields must be named */
   ...
 };
+
 </ul></pre></font>
 </td></tr>
 </table></center>
diff --git a/arch/arm/src/kinetis/kinetis_serial.c b/arch/arm/src/kinetis/kinetis_serial.c
index 63873ecab5f..79f0030b78d 100644
--- a/arch/arm/src/kinetis/kinetis_serial.c
+++ b/arch/arm/src/kinetis/kinetis_serial.c
@@ -592,6 +592,7 @@ static void up_restoreuartint(struct up_dev_s *priv, uint8_t ie)
  * Name: up_disableuartint
  ****************************************************************************/
 
+#ifdef HAVE_UART_CONSOLE
 static void up_disableuartint(struct up_dev_s *priv, uint8_t *ie)
 {
   irqstate_t flags;
@@ -605,6 +606,7 @@ static void up_disableuartint(struct up_dev_s *priv, uint8_t *ie)
   up_restoreuartint(priv, 0);
   leave_critical_section(flags);
 }
+#endif
 
 /****************************************************************************
  * Name: up_setup
diff --git a/arch/arm/src/stm32/stm32_serial.c b/arch/arm/src/stm32/stm32_serial.c
index a6a2d07b51b..6b6161f0ce4 100644
--- a/arch/arm/src/stm32/stm32_serial.c
+++ b/arch/arm/src/stm32/stm32_serial.c
@@ -2250,7 +2250,9 @@ static bool up_rxflowcontrol(struct uart_dev_s *dev,
                              unsigned int nbuffered, bool upper)
 {
   struct up_dev_s *priv = (struct up_dev_s *)dev->priv;
+#if !(defined(CONFIG_SERIAL_IFLOWCONTROL_WATERMARKS) && defined(CONFIG_STM32_FLOWCONTROL_BROKEN))
   uint16_t ie;
+#endif
 
 #if defined(CONFIG_SERIAL_IFLOWCONTROL_WATERMARKS) && defined(CONFIG_STM32_FLOWCONTROL_BROKEN)
   if (priv->iflow && (priv->rts_gpio != 0))
diff --git a/configs/nucleo-f072rb/README.txt b/configs/nucleo-f072rb/README.txt
index fb35cac2d37..033b7b75609 100644
--- a/configs/nucleo-f072rb/README.txt
+++ b/configs/nucleo-f072rb/README.txt
@@ -267,18 +267,55 @@ Configurations
 
     NOTES:
 
-    1. Support for NSH built-in applications is provided:
+    1. This initial release of this configuration was very minimal, but
+       also very small:
 
-       Binary Formats:
-         CONFIG_BUILTIN=y           : Enable support for built-in programs
+       $ size nuttx
+          text    data     bss     dec     hex filename
+         32000      92    1172   33264    81f0 nuttx
 
-       Application Configuration:
-         CONFIG_NSH_BUILTIN_APPS=y  : Enable starting apps from NSH command line
+       The current version, additional features have been enabled:  board
+       bring-up initialization, button support, the procfs file system,
+       and NSH built-in application support.  The size increased as follows:
 
-       No built applications are enabled in the base configuration, however.
+       $ size nuttx
+          text    data     bss     dec     hex filename
+         40231      92    1208   41531    a23b nuttx
 
-    2. C++ support for applications is enabled:
+       Those additional features cost about 8KiB FLASH.  I believe that is a
+       good use of the STM32F072RB's FLASH, but if you interested in the
+       more minimal configuration, here is what was changed:
 
-      CONFIG_HAVE_CXX=y
-      CONFIG_HAVE_CXXINITIALIZE=y
-      CONFIG_EXAMPLES_NSH_CXXINITIALIZE=y
+       Removed
+
+         CONFIG_BINFMT_DISABLE=y
+         CONFIG_DISABLE_MOUNTPOINT=y
+         CONFIG_NSH_DISABLE_CD=y
+
+       Added:
+
+         CONFIG_ARCH_BUTTONS=y
+         CONFIG_ARCH_IRQBUTTONS=y
+
+         CONFIG_BUILTIN=y
+         CONFIG_BUILTIN_PROXY_STACKSIZE=1024
+
+         CONFIG_FS_PROCFS=y
+         CONFIG_NSH_PROC_MOUNTPOINT="/proc"
+
+         CONFIG_LIB_BOARDCTL=y
+         CONFIG_NSH_ARCHINIT=y
+         CONFIG_NSH_BUILTIN_APPS=y
+
+       Support for NSH built-in applications is enabled for future use. 
+       However, no built applications are enabled in this base configuration.
+
+    2. C++ support for applications is NOT enabled.  That could be enabled
+       with the following configuration changes:
+
+         CONFIG_HAVE_CXX=y
+         CONFIG_HAVE_CXXINITIALIZE=y
+         CONFIG_EXAMPLES_NSH_CXXINITIALIZE=y
+
+       And also support fo C++ constructors under
+       apps/platform/nucleo-stm32f072rb.
diff --git a/configs/nucleo-f072rb/include/board.h b/configs/nucleo-f072rb/include/board.h
index 50493e09da3..1b45a24a51e 100644
--- a/configs/nucleo-f072rb/include/board.h
+++ b/configs/nucleo-f072rb/include/board.h
@@ -218,8 +218,8 @@
 /* Button definitions ***************************************************************/
 /* Buttons
  *
- *   B1 USER: the user button is connected to the I/O PC13 (pin 2) of the STM32
- *   microcontroller.
+ * B1 USER: the user button is connected to the I/O PC13 (pin 2) of the STM32
+ * microcontroller.
  */
 
 #define BUTTON_USER        0
diff --git a/configs/nucleo-f072rb/nsh/defconfig b/configs/nucleo-f072rb/nsh/defconfig
index 48868af1246..946a2edad25 100644
--- a/configs/nucleo-f072rb/nsh/defconfig
+++ b/configs/nucleo-f072rb/nsh/defconfig
@@ -407,14 +407,20 @@ CONFIG_ARCH_BOARD="nucleo-f072rb"
 CONFIG_ARCH_HAVE_LEDS=y
 CONFIG_ARCH_LEDS=y
 CONFIG_ARCH_HAVE_BUTTONS=y
-# CONFIG_ARCH_BUTTONS is not set
+CONFIG_ARCH_BUTTONS=y
 CONFIG_ARCH_HAVE_IRQBUTTONS=y
+CONFIG_ARCH_IRQBUTTONS=y
 
 #
 # Board-Specific Options
 #
 # CONFIG_BOARD_CRASHDUMP is not set
-# CONFIG_LIB_BOARDCTL is not set
+CONFIG_LIB_BOARDCTL=y
+# CONFIG_BOARDCTL_RESET is not set
+# CONFIG_BOARDCTL_UNIQUEID is not set
+# CONFIG_BOARDCTL_TSCTEST is not set
+# CONFIG_BOARDCTL_GRAPHICS is not set
+# CONFIG_BOARDCTL_IOCTL is not set
 
 #
 # RTOS Features
@@ -448,6 +454,7 @@ CONFIG_PREALLOC_TIMERS=0
 # CONFIG_SPINLOCK is not set
 # CONFIG_INIT_NONE is not set
 CONFIG_INIT_ENTRYPOINT=y
+# CONFIG_INIT_FILEPATH is not set
 CONFIG_USER_ENTRYPOINT="nsh_main"
 CONFIG_RR_INTERVAL=200
 # CONFIG_SCHED_SPORADIC is not set
@@ -675,13 +682,28 @@ CONFIG_SYSLOG_CONSOLE=y
 #
 # File system configuration
 #
-CONFIG_DISABLE_MOUNTPOINT=y
+# CONFIG_DISABLE_MOUNTPOINT is not set
+# CONFIG_FS_AUTOMOUNTER is not set
 CONFIG_DISABLE_PSEUDOFS_OPERATIONS=y
-# CONFIG_FS_READABLE is not set
+CONFIG_FS_READABLE=y
 # CONFIG_FS_WRITABLE is not set
 # CONFIG_FS_NAMED_SEMAPHORES is not set
 # CONFIG_FS_RAMMAP is not set
-# CONFIG_FS_PROCFS is not set
+# CONFIG_FS_FAT is not set
+# CONFIG_FS_NXFFS is not set
+# CONFIG_FS_ROMFS is not set
+# CONFIG_FS_TMPFS is not set
+# CONFIG_FS_SMARTFS is not set
+# CONFIG_FS_BINFS is not set
+CONFIG_FS_PROCFS=y
+# CONFIG_FS_PROCFS_REGISTER is not set
+
+#
+# Exclude individual procfs entries
+#
+# CONFIG_FS_PROCFS_EXCLUDE_PROCESS is not set
+# CONFIG_FS_PROCFS_EXCLUDE_UPTIME is not set
+# CONFIG_FS_PROCFS_EXCLUDE_MOUNTS is not set
 # CONFIG_FS_UNIONFS is not set
 
 #
@@ -709,7 +731,10 @@ CONFIG_MM_REGIONS=1
 #
 # Binary Loader
 #
-CONFIG_BINFMT_DISABLE=y
+# CONFIG_BINFMT_DISABLE is not set
+# CONFIG_NXFLAT is not set
+# CONFIG_ELF is not set
+CONFIG_BUILTIN=y
 # CONFIG_PIC is not set
 # CONFIG_SYMTAB_ORDEREDBYNAME is not set
 
@@ -762,6 +787,7 @@ CONFIG_LIB_RAND_ORDER=1
 #
 # Program Execution Options
 #
+# CONFIG_LIBC_EXECFUNCS is not set
 CONFIG_POSIX_SPAWN_PROXY_STACKSIZE=1024
 CONFIG_TASK_SPAWN_DEFAULT_STACKSIZE=1536
 
@@ -801,6 +827,7 @@ CONFIG_ARCH_HAVE_TLS=y
 #
 # NETDB Support
 #
+# CONFIG_NETDB_HOSTFILE is not set
 # CONFIG_LIBC_IOCTL_VARIADIC is not set
 CONFIG_LIB_SENDFILE_BUFSIZE=512
 
@@ -822,6 +849,11 @@ CONFIG_LIB_SENDFILE_BUFSIZE=512
 # Application Configuration
 #
 
+#
+# Built-In Applications
+#
+CONFIG_BUILTIN_PROXY_STACKSIZE=1024
+
 #
 # CAN Utilities
 #
@@ -867,12 +899,14 @@ CONFIG_EXAMPLES_NSH=y
 # CONFIG_EXAMPLES_SERLOOP is not set
 # CONFIG_EXAMPLES_SLCD is not set
 # CONFIG_EXAMPLES_SMART is not set
+# CONFIG_EXAMPLES_SMART_TEST is not set
 # CONFIG_EXAMPLES_SMP is not set
 # CONFIG_EXAMPLES_STAT is not set
 # CONFIG_EXAMPLES_TCPECHO is not set
 # CONFIG_EXAMPLES_TELNETD is not set
 # CONFIG_EXAMPLES_TIFF is not set
 # CONFIG_EXAMPLES_TOUCHSCREEN is not set
+# CONFIG_EXAMPLES_USBSERIAL is not set
 # CONFIG_EXAMPLES_WATCHDOG is not set
 # CONFIG_EXAMPLES_WEBSERVER is not set
 # CONFIG_EXAMPLES_XBC_TEST is not set
@@ -881,6 +915,7 @@ CONFIG_EXAMPLES_NSH=y
 # File System Utilities
 #
 # CONFIG_FSUTILS_INIFILE is not set
+# CONFIG_FSUTILS_PASSWD is not set
 
 #
 # GPS Utilities
@@ -896,6 +931,7 @@ CONFIG_EXAMPLES_NSH=y
 #
 # Interpreters
 #
+# CONFIG_INTERPRETERS_BAS is not set
 # CONFIG_INTERPRETERS_FICL is not set
 # CONFIG_INTERPRETERS_MICROPYTHON is not set
 # CONFIG_INTERPRETERS_MINIBASIC is not set
@@ -928,10 +964,12 @@ CONFIG_NSH_READLINE=y
 # CONFIG_NSH_CLE is not set
 CONFIG_NSH_LINELEN=64
 CONFIG_NSH_DISABLE_SEMICOLON=y
+# CONFIG_NSH_CMDPARMS is not set
 CONFIG_NSH_MAXARGUMENTS=6
 # CONFIG_NSH_ARGCAT is not set
 CONFIG_NSH_NESTDEPTH=3
 # CONFIG_NSH_DISABLEBG is not set
+CONFIG_NSH_BUILTIN_APPS=y
 
 #
 # Disable Individual commands
@@ -939,7 +977,7 @@ CONFIG_NSH_NESTDEPTH=3
 CONFIG_NSH_DISABLE_ADDROUTE=y
 CONFIG_NSH_DISABLE_BASENAME=y
 # CONFIG_NSH_DISABLE_CAT is not set
-CONFIG_NSH_DISABLE_CD=y
+# CONFIG_NSH_DISABLE_CD is not set
 CONFIG_NSH_DISABLE_CP=y
 CONFIG_NSH_DISABLE_CMP=y
 CONFIG_NSH_DISABLE_DATE=y
@@ -991,6 +1029,7 @@ CONFIG_NSH_MMCSDMINOR=0
 #
 CONFIG_NSH_CODECS_BUFSIZE=128
 # CONFIG_NSH_CMDOPT_HEXDUMP is not set
+CONFIG_NSH_PROC_MOUNTPOINT="/proc"
 CONFIG_NSH_FILEIOSIZE=64
 
 #
@@ -1003,7 +1042,7 @@ CONFIG_NSH_DISABLESCRIPT=y
 #
 CONFIG_NSH_CONSOLE=y
 # CONFIG_NSH_ALTCONDEV is not set
-# CONFIG_NSH_ARCHINIT is not set
+CONFIG_NSH_ARCHINIT=y
 # CONFIG_NSH_LOGIN is not set
 # CONFIG_NSH_CONSOLE_LOGIN is not set
 
diff --git a/configs/nucleo-f072rb/src/stm32_bringup.c b/configs/nucleo-f072rb/src/stm32_bringup.c
index 0c9c7f89dfe..137e458e782 100644
--- a/configs/nucleo-f072rb/src/stm32_bringup.c
+++ b/configs/nucleo-f072rb/src/stm32_bringup.c
@@ -41,6 +41,7 @@
 
 #include <sys/mount.h>
 #include <sys/types.h>
+#include <debug.h>
 
 #include "nucleo-f072rb.h"
 
@@ -72,7 +73,7 @@ int stm32_bringup(void)
   ret = mount(NULL, "/proc", "procfs", 0, NULL);
   if (ret < 0)
     {
-      syslog(LOG_ERR, "ERROR: Failed to mount procfs at /proc: %d\n", ret);
+      ferr("ERROR: Failed to mount procfs at /proc: %d\n", ret);
     }
 #endif
 
diff --git a/configs/nucleo-f072rb/src/stm32_buttons.c b/configs/nucleo-f072rb/src/stm32_buttons.c
index b4aed6807a4..f8574e47b3d 100644
--- a/configs/nucleo-f072rb/src/stm32_buttons.c
+++ b/configs/nucleo-f072rb/src/stm32_buttons.c
@@ -40,12 +40,14 @@
 #include <nuttx/config.h>
 
 #include <stdint.h>
+#include <stdbool.h>
 #include <errno.h>
 
 #include <nuttx/arch.h>
 #include <nuttx/board.h>
 #include <arch/board/board.h>
 
+#include "stm32f0_gpio.h"
 #include "nucleo-f072rb.h"
 
 #ifdef CONFIG_ARCH_BUTTONS
@@ -71,7 +73,7 @@ void board_button_initialize(void)
    * also configured for the pin.
    */
 
-  stm32_configgpio(GPIO_BTN_USER);
+  stm32f0_configgpio(GPIO_BTN_USER);
 }
 
 /****************************************************************************
@@ -84,7 +86,7 @@ uint32_t board_buttons(void)
    * pressed.
    */
 
-  bool released = stm32_gpioread(GPIO_BTN_USER);
+  bool released = stm32f0_gpioread(GPIO_BTN_USER);
   return !released;
 }
 
@@ -117,7 +119,7 @@ int board_button_irq(int id, xcpt_t irqhandler, FAR void *arg)
 
   if (id == BUTTON_USER)
     {
-      ret = stm32_gpiosetevent(GPIO_BTN_USER, true, true, true, irqhandler, arg);
+      ret = stm32f0_gpiosetevent(GPIO_BTN_USER, true, true, true, irqhandler, arg);
     }
 
   return ret;