STM32F429I-Discovery: Add support for the usbnsh and usbmsc configurations...

STM32F429I-Discovery: Add support for the usbnsh and usbmsc configurations using the OTG HS peripheral in FS mode. From Ken Pettit.

ChangeLog

@@ -6005,5 +6005,7 @@
 	  drivers extended so that they can support either the OTG FS
 	  peripheral or the OTG HS peripheral (in FS mode).  This was
 	  done as a quick way to get USB support on the STM32F429 which
-	  has only OTG HS.  From Ken Pettit (2013-11-9).
-
+	  has only OTG HS.  From Ken Pettit (2013-11-10).
+	* configs/stm32f429i-disco:  Add support for the usbnsh and
+	  usbmsc configurations using the OTG HS peripheral in FS mode.
+	  From Ken Pettit (2013-11-10)

configs/stm32f429i-disco/README.txt

@@ -16,22 +16,21 @@ memory and 256kbytes. The board features:
   - Easy access to most MCU pins.
 
 NOTE:  The STM32F429I-DISCO port is in early stages and has only limited
-       support at this point.  I have basic NSH command support with 
+       support at this point.  I have basic NSH command support with
        full 8MByte SDRAM + the internal 256K.  Unsupported are the LCD
        and USB interfaces.
-       
-       The board pin configuration to support on-board SDRAM and LCD 
-       prevents use of the OTG FS module which is normally used for USB 
-       NSH sessions.  Instead, the board routes the OTG HS pins to the 
-       USB OTG connector.  Until the port has been updated to use the 
-       OTG HS module of the MCU, USB functions are not available.  
+
+       The board pin configuration to support on-board SDRAM and LCD
+       prevents use of the OTG FS module which is normally used for USB
+       NSH sessions.  Instead, the board routes the OTG HS pins to the
+       USB OTG connector.  Until the port has been updated to use the
+       OTG HS module of the MCU, USB functions are not available.
 
        The NSH configuration / testing that has been done so far was
        performed by connecting an external RS-232 line driver to pins
        PA9 and PA10 and configuring UART1 as the NSH console.
 
-
-Refer to the http://www.st.com website for further information about this 
+Refer to the http://www.st.com website for further information about this
 board (search keyword: 429i-disco)
 
 Contents
@@ -51,8 +50,8 @@ Development Environment
 =======================
 
   The Development environments for the STM32F429I-DISCO board are identical
-  to the environments for other STM32F boards.  For full details on the 
-  environment options and setup, see the README.txt file in the 
+  to the environments for other STM32F boards.  For full details on the
+  environment options and setup, see the README.txt file in the
   config/stm32f4discovery directory.
 
 LEDs
@@ -70,8 +69,8 @@ events as follows:
   LED_STARTED          NuttX has been started   ON       OFF
   LED_HEAPALLOCATE     Heap has been allocated  OFF      ON
   LED_IRQSENABLED      Interrupts enabled       ON       ON
-  LED_STACKCREATED     Idle stack created       OFF      ON 
-  LED_INIRQ            In an interrupt**        ON       ON 
+  LED_STACKCREATED     Idle stack created       OFF      ON
+  LED_INIRQ            In an interrupt**        ON       ON
   LED_SIGNAL           In a signal handler      N/C      ON
   LED_ASSERTION        An assertion failed      ON       ON
   LED_PANIC            The system has crashed   ON       BLINK
@@ -87,8 +86,8 @@ UARTs
 
 On the STM32F429I-DISCO board, because of pin mappings to support the
 onboard SDRAM and LCD, the only UARTs that has both RX and TX pins
-avilalbe are USART1 and UART5.  Other USARTS could be used for RX or TX 
-only, or they could be used for full-duplex if the other pin functions 
+avilalbe are USART1 and UART5.  Other USARTS could be used for RX or TX
+only, or they could be used for full-duplex if the other pin functions
 aren't being used (i.e. LCD or SDRAM).
 
 UART/USART PINS
@@ -130,11 +129,11 @@ UART7
 
  * Indicates pins that have other on-board functions and should be used only
    with care (See table 6 in the STM32F429I-DISCO User Guide for a list of free
-   I/O pins on the board).  
- 
+   I/O pins on the board).
+
 Default USART/UART Configuration
 --------------------------------
- 
+
 USART1 is enabled in all configurations (see */defconfig).  RX and TX are
 configured on pins PA3 and PA2, respectively (see include/board.h).
 
@@ -248,7 +247,7 @@ the following lines in each Make.defs file:
 If you are using a toolchain other than the Atollic toolchain, then to use the FPU
 you will also have to modify the CFLAGS to enable compiler support for the ARMv7-M
 FPU.  As of this writing, there are not many GCC toolchains that will support the
-ARMv7-M FPU.  
+ARMv7-M FPU.
 
 As a minimum you will need to add CFLAG options to (1) enable hardware floating point
 code generation, and to (2) select the FPU implementation.  You might try the same
@@ -288,7 +287,7 @@ FMC SDRAM
 
 On-board SDRAM
 --------------
-The STM32F429I-DISCO has 8 MBytes on-board SDRAM connected to the MCU's 
+The STM32F429I-DISCO has 8 MBytes on-board SDRAM connected to the MCU's
 SDRAM Bank 2 connections (Bank 6 of the FSMC).  This means the 8 MBytes
 (when enabled) is mapped to address 0xD0000000-0xD07FFFFF.  The port for
 the STM32F429I-DISCO board includes support for using the onboard 8M SDRAM.
@@ -367,7 +366,7 @@ STM32F429I-DISCO-specific Configuration Options
        configuration features.
 
        CONFIG_ARCH_BOARD_STM32_CUSTOM_CLOCKCONFIG=n
- 
+
     CONFIG_ARCH_BOARD - Identifies the configs subdirectory and
        hence, the board that supports the particular chip or SoC.
 
@@ -517,7 +516,7 @@ STM32F429I-DISCO-specific Configuration Options
   configuration settings:
 
     CONFIG_STM32_TIMx_CHANNEL - Specifies the timer output channel {1,..,4}
- 
+
   NOTE: The STM32 timers are each capable of generating different signals on
   each of the four channels with different duty cycles.  That capability is
   not supported by this driver:  Only one output channel per timer.
@@ -574,7 +573,7 @@ STM32F429I-DISCO-specific Configuration Options
     CONFIG_SDIO_DMA - Support DMA data transfers.  Requires CONFIG_STM32_SDIO
       and CONFIG_STM32_DMA2.
     CONFIG_SDIO_PRI - Select SDIO interrupt prority.  Default: 128
-    CONFIG_SDIO_DMAPRIO - Select SDIO DMA interrupt priority. 
+    CONFIG_SDIO_DMAPRIO - Select SDIO DMA interrupt priority.
       Default:  Medium
     CONFIG_SDIO_WIDTH_D1_ONLY - Select 1-bit transfer mode.  Default:
       4-bit transfer mode.
@@ -582,15 +581,15 @@ STM32F429I-DISCO-specific Configuration Options
   STM32 USB OTG FS Host Driver Support
 
   Pre-requisites
- 
+
    CONFIG_USBDEV          - Enable USB device support
    CONFIG_USBHOST         - Enable USB host support
    CONFIG_STM32_OTGFS     - Enable the STM32 USB OTG FS block
    CONFIG_STM32_SYSCFG    - Needed
    CONFIG_SCHED_WORKQUEUE - Worker thread support is required
- 
+
   Options:
- 
+
    CONFIG_STM32_OTGFS_RXFIFO_SIZE - Size of the RX FIFO in 32-bit words.
      Default 128 (512 bytes)
    CONFIG_STM32_OTGFS_NPTXFIFO_SIZE - Size of the non-periodic Tx FIFO
@@ -631,7 +630,7 @@ Where <subdir> is one of the following:
     builtin applications are selected (see NOTES below).
 
     NOTES:
- 
+
     1. This configuration uses the mconf-based configuration tool.  To
        change this configuration using that tool, you should:
 
@@ -748,7 +747,7 @@ Where <subdir> is one of the following:
           you can still use certain kinds of debug output (see include/debug.h, all
           of the interfaces based on lowsyslog will work in this configuration).
 
-        - But don't enable USB debug output!  Since USB is console is used for 
+        - But don't enable USB debug output!  Since USB is console is used for
           USB debug output and you are using a USB console, there will be
           infinite loops and deadlocks:  Debug output generates USB debug
           output which generatates USB debug output, etc.  If you want USB
@@ -823,7 +822,7 @@ Where <subdir> is one of the following:
     apps/examples/ostest.
 
     NOTES:
- 
+
     1. This configuration uses the mconf-based configuration tool.  To
        change this configuration using that tool, you should:
 
@@ -839,7 +838,7 @@ Where <subdir> is one of the following:
 
     3. By default, this project assumes that you are *NOT* using the DFU
        bootloader.
- 
+
     4. If you use the Atollic toolchain, then the FPU test can be enabled in the
       examples/ostest by adding the following your NuttX configuration file:
 
@@ -867,5 +866,47 @@ Where <subdir> is one of the following:
       bytes (see arch/arm/include/armv7-m/irq_lazyfpu.h):
 
       -CONFIG_EXAMPLES_OSTEST_FPUSIZE=(4*33)
- 
 
+  usbnsh:
+  ------
+
+    This is another NSH example.  If differs from other 'nsh' configurations
+    in that this configurations uses a USB serial device for console I/O.
+    Such a configuration is useful on the stm32f429i-disco which has no
+    builtin RS-232 drivers.
+
+    NOTES:
+
+    1. This configuration uses the mconf-based configuration tool.  To
+       change this configuration using that tool, you should:
+
+       a. Build and install the kconfig-mconf tool.  See nuttx/README.txt
+          and misc/tools/
+
+       b. Execute 'make menuconfig' in nuttx/ in order to start the
+          reconfiguration process.
+
+    2. This configuration does have UART1 output enabled and set up as
+       the system logging device.  To use this UART, you must add an
+       external RS-232 line driver to the UART1 pins of the DISCO board
+       on PA9 and PA10 of connector P1.
+
+  usbmsc:
+  ------
+
+    This is an example of enabling the FS OTG port on the DISCO board for
+    mass storage use.  It provides an NSH session on UART1 to allow
+    accessing the connected USB mass storage device.  Such a configuration
+    is useful on the stm32f429i-disco which has no onboard SD card or mass
+    storage solution.
+
+    NOTES:
+
+    1. This configuration uses UART1 as the system console.  To use this
+       UART, you must add an external RS-232 line driver to the UART1 pins
+       of the DISCO board on PA9 and PA10 of connector P1.
+
+    2. The mass storage device will appear as /dev/sda and supports FAT
+       formatted "thumb" flash drives with:
+
+          nsh> mount -t vfat /dev/sda /mount_name

configs/stm32f429i-disco/nsh/Make.defs

 ############################################################################
-# configs/mikroe-stm32f4/usbnsh/Make.defs
+# configs/stm32f429i-disco/usbnsh/Make.defs
 #
 #   Copyright (C) 2013 Gregory Nutt. All rights reserved.
 #   Author: Gregory Nutt <gnutt@nuttx.org>

configs/stm32f429i-disco/ostest/Make.defs

 ############################################################################
-# configs/mikroe-stm32f4/usbnsh/Make.defs
+# configs/stm32f429i-disco/usbnsh/Make.defs
 #
 #   Copyright (C) 2013 Gregory Nutt. All rights reserved.
 #   Author: Gregory Nutt <gnutt@nuttx.org>

configs/stm32f429i-disco/src/Makefile

@@ -66,7 +66,10 @@ endif
 
 ifeq ($(CONFIG_STM32_FSMC),y)
 CSRCS += up_extmem.c
+endif
 
+ifeq ($(CONFIG_STM32_OTGFS2),y)
+CSRCS += up_usb.c
 endif
 
 COBJS = $(CSRCS:.c=$(OBJEXT))

configs/stm32f429i-disco/src/stm32f429i-disco-internal.h

@@ -92,21 +92,21 @@
 #define GPIO_CS_MEMS    (GPIO_OUTPUT|GPIO_PUSHPULL|GPIO_SPEED_50MHz|\
                          GPIO_OUTPUT_SET|GPIO_PORTE|GPIO_PIN3)
 
-/* USB OTG FS
+/* USB OTG HS
  *
- * PA9  OTG_FS_VBUS VBUS sensing (also connected to the green LED)
- * PC0  OTG_FS_PowerSwitchOn
- * PD5  OTG_FS_Overcurrent
+ * PA9  OTG_HS_VBUS VBUS sensing (also connected to the green LED)
+ * PC0  OTG_HS_PowerSwitchOn
+ * PD5  OTG_HS_Overcurrent
  */
 
-#define GPIO_OTGFS_VBUS (GPIO_INPUT|GPIO_FLOAT|GPIO_SPEED_100MHz|GPIO_OPENDRAIN|GPIO_PORTA|GPIO_PIN9)
-#define GPIO_OTGFS_PWRON (GPIO_OUTPUT|GPIO_FLOAT|GPIO_SPEED_100MHz|GPIO_PUSHPULL|GPIO_PORTC|GPIO_PIN0)
+#define GPIO_OTGHS_VBUS (GPIO_INPUT|GPIO_FLOAT|GPIO_SPEED_100MHz|GPIO_OPENDRAIN|GPIO_PORTB|GPIO_PIN13)
+#define GPIO_OTGHS_PWRON (GPIO_OUTPUT|GPIO_OUTPUT_SET|GPIO_FLOAT|GPIO_SPEED_100MHz|GPIO_PUSHPULL|GPIO_PORTC|GPIO_PIN4)
 
 #ifdef CONFIG_USBHOST
-#  define GPIO_OTGFS_OVER  (GPIO_INPUT|GPIO_EXTI|GPIO_FLOAT|GPIO_SPEED_100MHz|GPIO_PUSHPULL|GPIO_PORTD|GPIO_PIN5)
+#  define GPIO_OTGHS_OVER  (GPIO_INPUT|GPIO_EXTI|GPIO_FLOAT|GPIO_SPEED_100MHz|GPIO_PUSHPULL|GPIO_PORTD|GPIO_PIN5)
 
 #else
-#  define GPIO_OTGFS_OVER  (GPIO_INPUT|GPIO_FLOAT|GPIO_SPEED_100MHz|GPIO_PUSHPULL|GPIO_PORTD|GPIO_PIN5)
+#  define GPIO_OTGHS_OVER  (GPIO_INPUT|GPIO_FLOAT|GPIO_SPEED_100MHz|GPIO_PUSHPULL|GPIO_PORTC|GPIO_PIN5)
 #endif
 
 /****************************************************************************************************
@@ -142,7 +142,7 @@ void weak_function stm32_spiinitialize(void);
  *
  ****************************************************************************************************/
 
-#ifdef CONFIG_STM32_OTGFS
+#ifdef CONFIG_STM32_OTGFS2
 void weak_function stm32_usbinitialize(void);
 #endif
 
@@ -155,7 +155,7 @@ void weak_function stm32_usbinitialize(void);
  *
  ****************************************************************************************************/
 
-#if defined(CONFIG_STM32_OTGFS) && defined(CONFIG_USBHOST)
+#if defined(CONFIG_STM32_OTGFS2) && defined(CONFIG_USBHOST)
 int stm32_usbhost_initialize(void);
 #endif
 

configs/stm32f429i-disco/src/up_boot.c

@@ -82,13 +82,13 @@ void stm32_boardinitialize(void)
     }
 #endif
 
-  /* Initialize USB if the 1) OTG FS controller is in the configuration and 2)
+  /* Initialize USB if the 1) OTG HS controller is in the configuration and 2)
    * disabled, and 3) the weak function stm32_usbinitialize() has been brought 
    * into the build. Presumeably either CONFIG_USBDEV or CONFIG_USBHOST is also
    * selected.
    */
 
-#ifdef CONFIG_STM32_OTGFS
+#ifdef CONFIG_STM32_OTGFS2
   if (stm32_usbinitialize)
     {
       stm32_usbinitialize();

configs/stm32f429i-disco/src/up_nsh.c

@@ -54,7 +54,7 @@
 #  include <apps/usbmonitor.h>
 #endif
 
-#ifdef CONFIG_STM32_OTGFS
+#ifdef CONFIG_STM32_OTGFS2
 #  include "stm32_usbhost.h"
 #endif
 
@@ -71,9 +71,9 @@
 #define HAVE_USBHOST    1
 #define HAVE_USBMONITOR 1
 
-/* Can't support USB host or device features if USB OTG FS is not enabled */
+/* Can't support USB host or device features if USB OTG HS is not enabled */
 
-#ifndef CONFIG_STM32_OTGFS
+#ifndef CONFIG_STM32_OTGFS2
 #  undef HAVE_USBDEV
 #  undef HAVE_USBHOST
 #  undef HAVE_USBMONITOR
@@ -150,6 +150,19 @@ int nsh_archinitialize(void)
       message("nsh_archinitialize: Failed to initialize USB host: %d\n", ret);
       return ret;
     }
+
+#ifdef CONFIG_USBHOST_MSC
+  /* Initialize the USB storage class */
+
+  ret = usbhost_storageinit();
+  if (ret != OK)
+    {
+      message("nsh_archinitialize: Failed to initialize USB host storage: %d\n", ret);
+      return ret;
+    }
+
+#endif
+
 #endif
 
 #ifdef HAVE_USBMONITOR

configs/stm32f429i-disco/src/up_usb.c

+/************************************************************************************
+ * configs/stm32f429i-disco/src/up_usbdev.c
+ * arch/arm/src/board/up_boot.c
+ *
+ *   Copyright (C) 2013 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 <sys/types.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <sched.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/usb/usbdev.h>
+#include <nuttx/usb/usbhost.h>
+#include <nuttx/usb/usbdev_trace.h>
+
+#include "up_arch.h"
+#include "stm32.h"
+#include "stm32_otgfs.h"
+#include "stm32f429i-disco-internal.h"
+
+#ifdef CONFIG_STM32_OTGFS2
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+
+#if defined(CONFIG_USBDEV) || defined(CONFIG_USBHOST)
+#  define HAVE_USB 1
+#else
+#  warning "CONFIG_STM32_OTGFS2 is enabled but neither CONFIG_USBDEV nor CONFIG_USBHOST"
+#  undef HAVE_USB
+#endif
+
+#ifndef CONFIG_USBHOST_DEFPRIO
+#  define CONFIG_USBHOST_DEFPRIO 50
+#endif
+
+#ifndef CONFIG_USBHOST_STACKSIZE
+#  define CONFIG_USBHOST_STACKSIZE 1024
+#endif
+
+/************************************************************************************
+ * Private Data
+ ************************************************************************************/
+
+#ifdef CONFIG_USBHOST
+static struct usbhost_connection_s *g_usbconn;
+#endif
+
+/************************************************************************************
+ * Private Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: usbhost_waiter
+ *
+ * Description:
+ *   Wait for USB devices to be connected.
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_USBHOST
+static int usbhost_waiter(int argc, char *argv[])
+{
+  bool connected = false;
+  int ret;
+
+  uvdbg("Running\n");
+  for (;;)
+    {
+      /* Wait for the device to change state */
+
+      ret = CONN_WAIT(g_usbconn, &connected);
+      DEBUGASSERT(ret == OK);
+
+      connected = !connected;
+      uvdbg("%s\n", connected ? "connected" : "disconnected");
+
+      /* Did we just become connected? */
+
+      if (connected)
+        {
+          /* Yes.. enumerate the newly connected device */
+
+          (void)CONN_ENUMERATE(g_usbconn, 0);
+        }
+    }
+
+  /* Keep the compiler from complaining */
+
+  return 0;
+}
+#endif
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: stm32_usbinitialize
+ *
+ * Description:
+ *   Called from stm32_usbinitialize very early in inialization to setup USB-related
+ *   GPIO pins for the STM32F4Discovery board.
+ *
+ ************************************************************************************/
+
+void stm32_usbinitialize(void)
+{
+  /* The OTG HS has an internal soft pull-up.  No GPIO configuration is required */
+
+  /* Configure the OTG HS VBUS sensing GPIO, Power On, and Overcurrent GPIOs */
+
+#ifdef CONFIG_STM32_OTGFS2
+  stm32_configgpio(GPIO_OTGHS_VBUS);
+  stm32_configgpio(GPIO_OTGHS_PWRON);
+  stm32_configgpio(GPIO_OTGHS_OVER);
+#endif
+}
+
+/***********************************************************************************
+ * Name: stm32_usbhost_initialize
+ *
+ * Description:
+ *   Called at application startup time to initialize the USB host functionality.
+ *   This function will start a thread that will monitor for device
+ *   connection/disconnection events.
+ *
+ ***********************************************************************************/
+
+#ifdef CONFIG_USBHOST
+int stm32_usbhost_initialize(void)
+{
+  int pid;
+  int ret;
+
+  /* First, register all of the class drivers needed to support the drivers
+   * that we care about:
+   */
+
+  uvdbg("Register class drivers\n");
+  ret = usbhost_storageinit();
+  if (ret != OK)
+    {
+      udbg("Failed to register the mass storage class\n");
+    }
+
+  /* Then get an instance of the USB host interface */
+
+  uvdbg("Initialize USB host\n");
+  g_usbconn = stm32_otgfshost_initialize(0);
+  if (g_usbconn)
+    {
+      /* Start a thread to handle device connection. */
+
+      uvdbg("Start usbhost_waiter\n");
+
+      pid = TASK_CREATE("usbhost", CONFIG_USBHOST_DEFPRIO,
+                        CONFIG_USBHOST_STACKSIZE,
+                        (main_t)usbhost_waiter, (FAR char * const *)NULL);
+      return pid < 0 ? -ENOEXEC : OK;
+    }
+
+  return -ENODEV;
+}
+#endif
+
+/***********************************************************************************
+ * Name: stm32_usbhost_vbusdrive
+ *
+ * Description:
+ *   Enable/disable driving of VBUS 5V output.  This function must be provided be
+ *   each platform that implements the STM32 OTG HS host interface
+ *
+ *   "On-chip 5 V VBUS generation is not supported. For this reason, a charge pump 
+ *    or, if 5 V are available on the application board, a basic power switch, must 
+ *    be added externally to drive the 5 V VBUS line. The external charge pump can 
+ *    be driven by any GPIO output. When the application decides to power on VBUS 
+ *    using the chosen GPIO, it must also set the port power bit in the host port 
+ *    control and status register (PPWR bit in OTG_HS_HPRT).
+ *
+ *   "The application uses this field to control power to this port, and the core 
+ *    clears this bit on an overcurrent condition."
+ *
+ * Input Parameters:
+ *   iface - For future growth to handle multiple USB host interface.  Should be zero.
+ *   enable - true: enable VBUS power; false: disable VBUS power
+ *
+ * Returned Value:
+ *   None
+ *
+ ***********************************************************************************/
+
+#ifdef CONFIG_USBHOST
+void stm32_usbhost_vbusdrive(int iface, bool enable)
+{
+  DEBUGASSERT(iface == 0);
+  
+  if (enable)
+    {
+      /* Enable the Power Switch by driving the enable pin low */
+
+      stm32_gpiowrite(GPIO_OTGHS_PWRON, false);
+    }
+  else
+    { 
+      /* Disable the Power Switch by driving the enable pin high */
+ 
+      stm32_gpiowrite(GPIO_OTGHS_PWRON, true);
+    }
+}
+#endif
+
+/************************************************************************************
+ * Name: stm32_setup_overcurrent
+ *
+ * Description:
+ *   Setup to receive an interrupt-level callback if an overcurrent condition is
+ *   detected.
+ *
+ * Input Parameters:
+ *   handler - New overcurrent interrupt handler
+ *
+ * Returned Value:
+ *   Old overcurrent interrupt handler
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_USBHOST
+xcpt_t stm32_setup_overcurrent(xcpt_t handler)
+{
+  return stm32_gpiosetevent(GPIO_OTGHS_OVER, true, true, true, handler);
+}
+#endif
+
+/************************************************************************************
+ * Name:  stm32_usbsuspend
+ *
+ * Description:
+ *   Board logic must provide the stm32_usbsuspend logic if the USBDEV driver is
+ *   used.  This function is called whenever the USB enters or leaves suspend mode.
+ *   This is an opportunity for the board logic to shutdown clocks, power, etc.
+ *   while the USB is suspended.
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_USBDEV
+void stm32_usbsuspend(FAR struct usbdev_s *dev, bool resume)
+{
+  ulldbg("resume: %d\n", resume);
+}
+#endif
+
+#endif /* CONFIG_STM32_OTGFS2 */
+

configs/stm32f429i-disco/usbmsc/Make.defs

+############################################################################
+# configs/stm32f429i-disco/usbnsh/Make.defs
+#
+#   Copyright (C) 2013 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.
+#
+############################################################################
+
+include ${TOPDIR}/.config
+include ${TOPDIR}/tools/Config.mk
+include ${TOPDIR}/arch/arm/src/armv7-m/Toolchain.defs
+
+LDSCRIPT = ld.script
+
+ifeq ($(WINTOOL),y)
+  # Windows-native toolchains
+  DIRLINK = $(TOPDIR)/tools/copydir.sh
+  DIRUNLINK = $(TOPDIR)/tools/unlink.sh
+  MKDEP = $(TOPDIR)/tools/mknulldeps.sh
+  ARCHINCLUDES = -I. -isystem "${shell cygpath -w $(TOPDIR)/include}"
+  ARCHXXINCLUDES = -I. -isystem "${shell cygpath -w $(TOPDIR)/include}" -isystem "${shell cygpath -w $(TOPDIR)/include/cxx}"
+  ARCHSCRIPT = -T "${shell cygpath -w $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/$(LDSCRIPT)}"
+  MAXOPTIMIZATION = -O2
+else
+  # Linux/Cygwin-native toolchain 
+  MKDEP = $(TOPDIR)/tools/mkdeps.sh
+  ARCHINCLUDES = -I. -isystem $(TOPDIR)/include
+  ARCHXXINCLUDES = -I. -isystem $(TOPDIR)/include -isystem $(TOPDIR)/include/cxx
+  ARCHSCRIPT = -T$(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/$(LDSCRIPT)
+endif
+
+CC = $(CROSSDEV)gcc
+CXX = $(CROSSDEV)g++
+CPP = $(CROSSDEV)gcc -E
+LD = $(CROSSDEV)ld
+AR = $(ARCROSSDEV)ar rcs
+NM = $(ARCROSSDEV)nm
+OBJCOPY = $(CROSSDEV)objcopy
+OBJDUMP = $(CROSSDEV)objdump
+
+ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
+ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
+
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
+  ARCHOPTIMIZATION = -g
+else
+  ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
+endif
+
+ARCHCFLAGS = -fno-builtin
+ARCHCXXFLAGS = -fno-builtin -fno-exceptions -fno-rtti
+ARCHWARNINGS = -Wall -Wstrict-prototypes -Wshadow
+ARCHWARNINGSXX = -Wall -Wshadow
+ARCHDEFINES =
+ARCHPICFLAGS = -fpic -msingle-pic-base -mpic-register=r10
+
+CFLAGS = $(ARCHCFLAGS) $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES) -pipe
+CPICFLAGS = $(ARCHPICFLAGS) $(CFLAGS)
+CXXFLAGS = $(ARCHCXXFLAGS) $(ARCHWARNINGSXX) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHXXINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES) -pipe
+CXXPICFLAGS = $(ARCHPICFLAGS) $(CXXFLAGS)
+CPPFLAGS = $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
+AFLAGS = $(CFLAGS) -D__ASSEMBLY__
+
+NXFLATLDFLAGS1 = -r -d -warn-common
+NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
+LDNXFLATFLAGS = -e main -s 2048
+
+OBJEXT = .o
+LIBEXT = .a
+EXEEXT =
+
+ifneq ($(CROSSDEV),arm-nuttx-elf-)
+  LDFLAGS += -nostartfiles -nodefaultlibs
+endif
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
+  LDFLAGS += -g
+endif
+
+HOSTCC = gcc
+HOSTINCLUDES = -I.
+HOSTCFLAGS = -Wall -Wstrict-prototypes -Wshadow -g -pipe
+HOSTLDFLAGS =
+

configs/stm32f429i-disco/usbmsc/setenv.sh

+#!/bin/bash
+# configs/stm32f429i-disco/usbnsh/setenv.sh
+#
+#   Copyright (C) 2013 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.
+#
+
+if [ "$_" = "$0" ] ; then
+  echo "You must source this script, not run it!" 1>&2
+  exit 1
+fi
+
+WD=`pwd`
+if [ ! -x "setenv.sh" ]; then
+  echo "This script must be executed from the top-level NuttX build directory"
+  exit 1
+fi
+
+if [ -z "${PATH_ORIG}" ]; then
+  export PATH_ORIG="${PATH}"
+fi
+
+# This is the Cygwin path to the location where I installed the RIDE
+# toolchain under windows.  You will also have to edit this if you install
+# the RIDE toolchain in any other location
+#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/Raisonance/Ride/arm-gcc/bin"
+
+# This is the Cygwin path to the location where I installed the CodeSourcery
+# toolchain under windows.  You will also have to edit this if you install
+# the CodeSourcery toolchain in any other location
+#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery G++ Lite/bin"
+
+# These are the Cygwin paths to the locations where I installed the Atollic
+# toolchain under windows.  You will also have to edit this if you install
+# the Atollic toolchain in any other location.  /usr/bin is added before
+# the Atollic bin path because there is are binaries named gcc.exe and g++.exe
+# at those locations as well.
+#export TOOLCHAIN_BIN="/usr/bin:/cygdrive/c/Program Files (x86)/Atollic/TrueSTUDIO for ARM Pro 2.3.0/ARMTools/bin"
+#export TOOLCHAIN_BIN="/usr/bin:/cygdrive/c/Program Files (x86)/Atollic/TrueSTUDIO for STMicroelectronics STM32 Lite 2.3.0/ARMTools/bin"
+
+# This is the Cygwin path to the location where I build the buildroot
+# toolchain.
+#export TOOLCHAIN_BIN="${WD}/../misc/buildroot/build_arm_nofpu/staging_dir/bin"
+
+export TOOLCHAIN_BIN="/home/ken/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_EABI/bin"
+
+# Add the path to the toolchain to the PATH varialble
+export PATH="${TOOLCHAIN_BIN}:/sbin:/usr/sbin:${PATH_ORIG}"
+
+echo "PATH : ${PATH}"

configs/stm32f429i-disco/usbnsh/Make.defs

+############################################################################
+# configs/stm32f429i-disco/usbnsh/Make.defs
+#
+#   Copyright (C) 2013 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.
+#
+############################################################################
+
+include ${TOPDIR}/.config
+include ${TOPDIR}/tools/Config.mk
+include ${TOPDIR}/arch/arm/src/armv7-m/Toolchain.defs
+
+LDSCRIPT = ld.script
+
+ifeq ($(WINTOOL),y)
+  # Windows-native toolchains
+  DIRLINK = $(TOPDIR)/tools/copydir.sh
+  DIRUNLINK = $(TOPDIR)/tools/unlink.sh
+  MKDEP = $(TOPDIR)/tools/mknulldeps.sh
+  ARCHINCLUDES = -I. -isystem "${shell cygpath -w $(TOPDIR)/include}"
+  ARCHXXINCLUDES = -I. -isystem "${shell cygpath -w $(TOPDIR)/include}" -isystem "${shell cygpath -w $(TOPDIR)/include/cxx}"
+  ARCHSCRIPT = -T "${shell cygpath -w $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/$(LDSCRIPT)}"
+  MAXOPTIMIZATION = -O2
+else
+  # Linux/Cygwin-native toolchain 
+  MKDEP = $(TOPDIR)/tools/mkdeps.sh
+  ARCHINCLUDES = -I. -isystem $(TOPDIR)/include
+  ARCHXXINCLUDES = -I. -isystem $(TOPDIR)/include -isystem $(TOPDIR)/include/cxx
+  ARCHSCRIPT = -T$(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/$(LDSCRIPT)
+endif
+
+CC = $(CROSSDEV)gcc
+CXX = $(CROSSDEV)g++
+CPP = $(CROSSDEV)gcc -E
+LD = $(CROSSDEV)ld
+AR = $(ARCROSSDEV)ar rcs
+NM = $(ARCROSSDEV)nm
+OBJCOPY = $(CROSSDEV)objcopy
+OBJDUMP = $(CROSSDEV)objdump
+
+ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
+ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
+
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
+  ARCHOPTIMIZATION = -g
+else
+  ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
+endif
+
+ARCHCFLAGS = -fno-builtin
+ARCHCXXFLAGS = -fno-builtin -fno-exceptions -fno-rtti
+ARCHWARNINGS = -Wall -Wstrict-prototypes -Wshadow
+ARCHWARNINGSXX = -Wall -Wshadow
+ARCHDEFINES =
+ARCHPICFLAGS = -fpic -msingle-pic-base -mpic-register=r10
+
+CFLAGS = $(ARCHCFLAGS) $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES) -pipe
+CPICFLAGS = $(ARCHPICFLAGS) $(CFLAGS)
+CXXFLAGS = $(ARCHCXXFLAGS) $(ARCHWARNINGSXX) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHXXINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES) -pipe
+CXXPICFLAGS = $(ARCHPICFLAGS) $(CXXFLAGS)
+CPPFLAGS = $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
+AFLAGS = $(CFLAGS) -D__ASSEMBLY__
+
+NXFLATLDFLAGS1 = -r -d -warn-common
+NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
+LDNXFLATFLAGS = -e main -s 2048
+
+OBJEXT = .o
+LIBEXT = .a
+EXEEXT =
+
+ifneq ($(CROSSDEV),arm-nuttx-elf-)
+  LDFLAGS += -nostartfiles -nodefaultlibs
+endif
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
+  LDFLAGS += -g
+endif
+
+HOSTCC = gcc
+HOSTINCLUDES = -I.
+HOSTCFLAGS = -Wall -Wstrict-prototypes -Wshadow -g -pipe
+HOSTLDFLAGS =
+

configs/stm32f429i-disco/usbnsh/setenv.sh

+#!/bin/bash
+# configs/stm32f429i-disco/usbnsh/setenv.sh
+#
+#   Copyright (C) 2013 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.
+#
+
+if [ "$_" = "$0" ] ; then
+  echo "You must source this script, not run it!" 1>&2
+  exit 1
+fi
+
+WD=`pwd`
+if [ ! -x "setenv.sh" ]; then
+  echo "This script must be executed from the top-level NuttX build directory"
+  exit 1
+fi
+
+if [ -z "${PATH_ORIG}" ]; then
+  export PATH_ORIG="${PATH}"
+fi
+
+# This is the Cygwin path to the location where I installed the RIDE
+# toolchain under windows.  You will also have to edit this if you install
+# the RIDE toolchain in any other location
+#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/Raisonance/Ride/arm-gcc/bin"
+
+# This is the Cygwin path to the location where I installed the CodeSourcery
+# toolchain under windows.  You will also have to edit this if you install
+# the CodeSourcery toolchain in any other location
+#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery G++ Lite/bin"
+
+# These are the Cygwin paths to the locations where I installed the Atollic
+# toolchain under windows.  You will also have to edit this if you install
+# the Atollic toolchain in any other location.  /usr/bin is added before
+# the Atollic bin path because there is are binaries named gcc.exe and g++.exe
+# at those locations as well.
+#export TOOLCHAIN_BIN="/usr/bin:/cygdrive/c/Program Files (x86)/Atollic/TrueSTUDIO for ARM Pro 2.3.0/ARMTools/bin"
+#export TOOLCHAIN_BIN="/usr/bin:/cygdrive/c/Program Files (x86)/Atollic/TrueSTUDIO for STMicroelectronics STM32 Lite 2.3.0/ARMTools/bin"
+
+# This is the Cygwin path to the location where I build the buildroot
+# toolchain.
+#export TOOLCHAIN_BIN="${WD}/../misc/buildroot/build_arm_nofpu/staging_dir/bin"
+
+export TOOLCHAIN_BIN="/home/ken/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_EABI/bin"
+
+# Add the path to the toolchain to the PATH varialble
+export PATH="${TOOLCHAIN_BIN}:/sbin:/usr/sbin:${PATH_ORIG}"
+
+echo "PATH : ${PATH}"