SAMV71-XULT: Add support for on-board LEDs. Includes partial support for on-board buttons. Some corrections fo to egg-stk37000 and sam4e-ek discovered during leveraging. Add board READEM.txt file

7 files changed, 821 insertions, 17 deletions

diff --git a/nuttx/configs/samv71-xult/README.txt b/nuttx/configs/samv71-xult/README.txt
new file mode 100644
index 0000000000..2fe1ba5bca
--- /dev/null
+++ b/nuttx/configs/samv71-xult/README.txt
@@ -0,0 +1,174 @@
+README
+======
+
+This README file discusses the port of NuttX to the Atmel SAM V71 Xplained
+Ultra Evaluation Kit (SAMV71-XULT).  This board features the ATSAMV71Q21 Cortex-M7
+microcontroller.
+
+Contents
+========
+
+  - Board Features
+  - Serial Console
+  - LEDs and Buttons
+  - Configurations
+
+Board Features
+==============
+
+  - ATSAMV71Q21 microcontroller: Cortex-M7, 300MHz, 2MiB FLASH, 384KiB SRAM,
+    I/D-caches
+  - One mechanical reset button
+  - One power switch button
+  - Two mechanical user pushbuttons
+  - Two yellow user LEDs
+  - Supercap backup
+  - 12.0 MHz crystal
+  - 32.768 kHz crystal
+  - 2 MB SDRAM
+  - 2 MB QSPI Flash
+  - IEEE 802.3az 10Base-T/100Base-TX Ethernet RMII PHY
+  - AT24MAC402 256KByte EEPROM with EUI-48 address
+  - WM8904 stereo audio codec
+  - ATA6561 CAN Transceiver
+  - SD Card connector with SDIO support
+  - Camera interface connector
+  - MediaLB connector
+  - Two Xplained Pro extension headers
+  - One Xplained Pro LCD header
+  - Coresight 20 connector for 4-bit ETM
+  - Arduino due compatible shield connectors
+  - External debugger connector
+  - USB interface, device and host mode
+  - Embedded Debugger with Data Gateway Interface and Virtual COM port (CDC)
+  - External power input (5-14V) or USB powered
+
+See the Atmel webite for further information about this board:
+
+  - http://www.atmel.com/tools/atsamv71-xult.aspx
+
+Serial Console
+==============
+
+The SAMV71-XULT has no on-board RS-232 drivers so it will be necessary to
+use either the VCOM or an external RS-232 driver.  Here are some options.
+
+  - Arduino Serial Shield:  One option is to use an Arduino-compatible
+    serial shield.  This will use the RXD and TXD signals available at pins
+    0 an 1, respectively, of the Arduino "Digital Low" connector.  On the
+    SAMV71-XULT board, this corresponds to UART3:
+
+    ------ ------ ------- ------- --------
+    Pin on SAMV71 Arduino Arduino SAMV71
+    J503   PIO    Name    Pin     Function
+    ------ ------ ------- ------- --------
+      1    PD28   RX0     0       URXD3
+      2    PD30   TX0     1       UTXD3
+    ------ ------ ------- ------- --------
+
+  - SAMV7-XULT EXTn connectors.  USART pins are also available the EXTn
+    connectors.  The following are labelled in the User Guide for USART
+    functionality:
+
+    ---- -------- ------ --------
+    EXT1 EXTI1    SAMV71 SAMV71
+    Pin  Name     PIO    Function
+    ---- -------- ------ --------
+    13   USART_RX PB00   RXD0
+    14   USART_TX PB01   TXD0
+
+    ---- -------- ------ --------
+    EXT2 EXTI2    SAMV71 SAMV71
+    Pin  Name     PIO    Function
+    ---- -------- ------ --------
+    13   USART_RX PA21   RXD1
+    14   USART_TX PB04   TXD1
+
+  - VCOM.  The Virtual Com Port gateway is available on USART1:
+
+    ------ --------
+    SAMV71 SAMV71
+    PIO    Function
+    ------ --------
+    PB04   TXD1
+    PA21   RXD1
+    ------ --------
+
+Any of these options can be selected as the serial console by:
+
+  1. Enabling the UART/USART peripheral in the
+     "System Type -> Peripheral Selection" menu, then
+  2. Configuring the peripheral in the "Drivers -> Serial Configuration"
+     menu.
+
+LEDs and Buttons
+================
+
+LEDs
+----
+There are two yellow LED available on the SAM V71 Xplained Ultra board that
+can be turned on and off.  The LEDs can be activated by driving the
+connected I/O line to GND.
+
+  ------ ----------- ---------------------
+  SAMV71 Function    Shared functionality
+  PIO
+  ------ ----------- ---------------------
+  PA23   Yellow LED0 EDBG GPIO
+  PC09   Yellow LED1 LCD, and Shield
+  ------ ----------- ---------------------
+
+These LEDs are not used by the board port unless CONFIG_ARCH_LEDS is
+defined.  In that case, the usage by the board port is defined in
+include/board.h and src/sam_autoleds.c. The LEDs are used to encode
+OS-related events as follows:
+
+  -------------------  -----------------------  -------- --------
+  SYMBOL                Meaning                     LED state
+                                                  LED0     LED1
+  -------------------  -----------------------  -------- --------
+  LED_STARTED          NuttX has been started     OFF      OFF
+  LED_HEAPALLOCATE     Heap has been allocated    OFF      OFF
+  LED_IRQSENABLED      Interrupts enabled         OFF      OFF
+  LED_STACKCREATED     Idle stack created         ON       OFF
+  LED_INIRQ            In an interrupt              No change
+  LED_SIGNAL           In a signal handler          No change
+  LED_ASSERTION        An assertion failed          No change
+  LED_PANIC            The system has crashed     N/C      Blinking
+  LED_IDLE             MCU is is sleep mode         Not used
+  -------------------  -----------------------  -------- --------
+
+Thus if LED0 is statically on, NuttX has successfully booted and is,
+apparently, running normally.  If LED1 is flashing at approximately
+2Hz, then a fatal error has been detected and the system has halted.
+
+NOTE: That LED0 is not used after completion of booting and may
+be used by other board-specific logic.
+
+Buttons
+-------
+SAM V71 Xplained Ultra contains three mechanical buttons. One button is the
+RESET button connected to the SAM V71 reset line and the others are generic
+user configurable buttons. When a button is pressed it will drive the I/O
+line to GND.
+
+  ------ ----------- ---------------------
+  SAMV71 Function    Shared functionality
+  PIO
+  ------ ----------- ---------------------
+  RESET  RESET       Trace, Shield, and EDBG
+  PA09   SW0         EDBG GPIO and Camera
+  PB12   SW1         EDBG SWD and Chip Erase
+  ------ ----------- ---------------------
+
+NOTES:
+
+  - There are no pull-up resistors connected to the generic user buttons so
+    it is necessary to enable the internal pull-up in the SAM V71 to use the
+    button.
+  - PB12 is set up as a system flash ERASE pin when the firmware boots. To
+    use the SW1, PB12 has to be configured as a normal regular I/O pin in
+    the MATRIX module. For more information see the SAM V71 datasheet.
+
+Configurations
+==============
diff --git a/nuttx/configs/samv71-xult/include/board.h b/nuttx/configs/samv71-xult/include/board.h
index 4d136abd8c..e4dbc7a759 100644
--- a/nuttx/configs/samv71-xult/include/board.h
+++ b/nuttx/configs/samv71-xult/include/board.h
@@ -169,8 +169,153 @@
 #define BOARD_FWS                  4
 
 /* LED definitions ******************************************************************/
+/* LEDs
+ *
+ * There are two yellow LED available on the SAM V71 Xplained Ultra board that
+ * can be turned on and off.  The LEDs can be activated by driving the
+ * connected I/O line to GND.
+ *
+ *   ------ ----------- ---------------------
+ *   SAMV71 Function    Shared functionality
+ *   PIO
+ *   ------ ----------- ---------------------
+ *   PA23   Yellow LED0 EDBG GPIO
+ *   PC09   Yellow LED1 LCD, and Shield
+ *   ------ ----------- ---------------------
+ *
+ * If CONFIG_ARCH_LEDS is not defined, then the user can control the LEDs in any
+ * way.  The following definitions are used to access individual LEDs.
+ */
+
+/* LED index values for use with lpc31_setled() */
+
+#define BOARD_LED0        0
+#define BOARD_LED1        1
+#define BOARD_NLEDS       2
+
+/* LED bits for use with lpc31_setleds() */
+
+#define BOARD_LED0_BIT    (1 << BOARD_LED0)
+#define BOARD_LED1_BIT    (1 << BOARD_LED1)
+
+/* These LEDs are not used by the board port unless CONFIG_ARCH_LEDS is
+ * defined.  In that case, the usage by the board port is defined in
+ * include/board.h and src/sam_autoleds.c. The LEDs are used to encode
+ * OS-related events as follows:
+ *
+ *   SYMBOL                     Meaning                      LED state
+ *                                                         LED2   LED1
+ *   ------------------------  --------------------------  ------ ------ */
+
+#define LED_STARTED          0 /* NuttX has been started   OFF    OFF    */
+#define LED_HEAPALLOCATE     0 /* Heap has been allocated  OFF    OFF    */
+#define LED_IRQSENABLED      0 /* Interrupts enabled       OFF    OFF    */
+#define LED_STACKCREATED     1 /* Idle stack created       ON     OFF    */
+#define LED_INIRQ            2 /* In an interrupt           No change    */
+#define LED_SIGNAL           2 /* In a signal handler       No change    */
+#define LED_ASSERTION        2 /* An assertion failed       No change    */
+#define LED_PANIC            3 /* The system has crashed   N/C  Blinking */
+#undef  LED_IDLE               /* MCU is is sleep mode      Not used     */
+
+/* Thus if LED0 is statically on, NuttX has successfully booted and is,
+ * apparently, running normally.  If LED1 is flashing at approximately
+ * 2Hz, then a fatal error has been detected and the system has halted.
+ *
+ * NOTE: That LED0 is not used after completion of booting and may
+ * be used by other board-specific logic.
+ */
 
 /* Button definitions ***************************************************************/
+/* Buttons
+ *
+ * SAM V71 Xplained Ultra contains three mechanical buttons. One button is the
+ * RESET button connected to the SAM V71 reset line and the others are generic
+ * user configurable buttons. When a button is pressed it will drive the I/O
+ * line to GND.
+ *
+ *   ------ ----------- ---------------------
+ *   SAMV71 Function    Shared functionality
+ *   PIO
+ *   ------ ----------- ---------------------
+ *   RESET  RESET       Trace, Shield, and EDBG
+ *   PA09   SW0         EDBG GPIO and Camera
+ *   PB12   SW1         EDBG SWD and Chip Erase
+ *   ------ ----------- ---------------------
+ *
+ * NOTES:
+ *
+ *   - There are no pull-up resistors connected to the generic user buttons so
+ *     it is necessary to enable the internal pull-up in the SAM V71 to use the
+ *     button.
+ *   - PB12 is set up as a system flash ERASE pin when the firmware boots. To
+ *     use the SW1, PB12 has to be configured as a normal regular I/O pin in
+ *     the MATRIX module. For more information see the SAM V71 datasheet.
+ */
+
+#define BUTTON_SW0        0
+#define BUTTON_SW1        1
+#define NUM_BUTTONS       2
+
+#define BUTTON_SW0_BIT    (1 << BUTTON_SW0)
+#define BUTTON_SW1_BIT    (1 << BUTTON_SW1)
+
+/* PIO Disambiguation ***************************************************************/
+/* Serial Console
+ *
+ * The SAMV71-XULT has no on-board RS-232 drivers so it will be necessary to use
+ * either the VCOM or an external RS-232 driver.  Here are some options.
+ *
+ *  - Arduino Serial Shield:  One option is to use an Arduino-compatible
+ *    serial shield.  This will use the RXD and TXD signals available at pins
+ *    0 an 1, respectively, of the Arduino "Digital Low" connector.  On the
+ *    SAMV71-XULT board, this corresponds to UART3:
+ *
+ *    ------ ------ ------- ------- --------
+ *    Pin on SAMV71 Arduino Arduino SAMV71
+ *    J503   PIO    Name    Pin     Function
+ *    ------ ------ ------- ------- --------
+ *      1    PD28   RX0     0       URXD3
+ *      2    PD30   TX0     1       UTXD3
+ *    ------ ------ ------- ------- --------
+ *
+ *    There are alternative pin selections only for UTXD3:
+ */
+
+#define GPIO_UART3_TXD  GPIO_UART3_TXD_1
+
+/*  - SAMV7-XULT EXTn connectors.  USART pins are also available the EXTn
+ *    connectors.  The following are labelled in the User Guide for USART
+ *    functionality:
+ *
+ *    ---- -------- ------ --------
+ *    EXT1 EXTI1    SAMV71 SAMV71
+ *    Pin  Name     PIO    Function
+ *    ---- -------- ------ --------
+ *    13   USART_RX PB00   RXD0
+ *    14   USART_TX PB01   TXD0
+ *
+ *    ---- -------- ------ --------
+ *    EXT2 EXTI2    SAMV71 SAMV71
+ *    Pin  Name     PIO    Function
+ *    ---- -------- ------ --------
+ *    13   USART_RX PA21   RXD1
+ *    14   USART_TX PB04   TXD1
+ *
+ *    There are no alternative pin selections for USART0 or USART1.
+ */
+
+/*  - VCOM.  The Virtual Com Port gateway is available on USART1:
+ *
+ *    ------ --------
+ *    SAMV71 SAMV71
+ *    PIO    Function
+ *    ------ --------
+ *    PB04   TXD1
+ *    PA21   RXD1
+ *    ------ --------
+ *
+ *    There are no alternative pin selections for USART1.
+ */
 
 /************************************************************************************
  * Public Types
@@ -200,7 +345,7 @@ extern "C"
  *
  * Description:
  *   If CONFIG_ARCH_LEDS is defined, then NuttX will control the on-board LEDs.  If
- *   CONFIG_ARCH_LEDS is not defined, then the following interfacesare available to
+ *   CONFIG_ARCH_LEDS is not defined, then the following interfaces are available to
  *   control the LEDs from user applications.
  *
  ************************************************************************************/
diff --git a/nuttx/configs/samv71-xult/nsh/defconfig b/nuttx/configs/samv71-xult/nsh/defconfig
index d145ec119f..2e77591877 100644
--- a/nuttx/configs/samv71-xult/nsh/defconfig
+++ b/nuttx/configs/samv71-xult/nsh/defconfig
@@ -148,6 +148,7 @@ CONFIG_SAMV7_HAVE_EBI=y
 CONFIG_SAMV7_HAVE_HSMCI=y
 # CONFIG_SAMV7_HAVE_ISI8 is not set
 CONFIG_SAMV7_HAVE_SDRAMC=y
+# CONFIG_SAMV7_HAVE_SPI is not set
 CONFIG_SAMV7_HAVE_SPI0=y
 CONFIG_SAMV7_HAVE_SPI1=y
 # CONFIG_SAMV7_QSPI_IS_SPI is not set
@@ -282,7 +283,7 @@ CONFIG_ARCH_BOARD="samv71-xult"
 # Common Board Options
 #
 CONFIG_ARCH_HAVE_LEDS=y
-# CONFIG_ARCH_LEDS is not set
+CONFIG_ARCH_LEDS=y
 CONFIG_ARCH_HAVE_BUTTONS=y
 # CONFIG_ARCH_BUTTONS is not set
 CONFIG_ARCH_HAVE_IRQBUTTONS=y
@@ -735,7 +736,6 @@ CONFIG_EXAMPLES_NSH=y
 # CONFIG_NETUTILS_CODECS is not set
 # CONFIG_NETUTILS_FTPC is not set
 # CONFIG_NETUTILS_JSON is not set
-# CONFIG_NETUTILS_DNSCLIENT_IPv4 is not set
 # CONFIG_NETUTILS_SMTP is not set
 CONFIG_NETUTILS_TFTPC=y
 # CONFIG_NETUTILS_THTTPD is not set
@@ -835,8 +835,6 @@ CONFIG_NSH_FILEIOSIZE=512
 CONFIG_NSH_CONSOLE=y
 # CONFIG_NSH_ALTCONDEV is not set
 # CONFIG_NSH_ARCHINIT is not set
-# CONFIG_NSH_SWMAC is not set
-# CONFIG_NSH_ARCHMAC is not set
 
 #
 # NxWidgets/NxWM
diff --git a/nuttx/configs/samv71-xult/src/sam_autoleds.c b/nuttx/configs/samv71-xult/src/sam_autoleds.c
new file mode 100644
index 0000000000..247f3a4883
--- /dev/null
+++ b/nuttx/configs/samv71-xult/src/sam_autoleds.c
@@ -0,0 +1,180 @@
+/****************************************************************************
+ * configs/samv71-xult/include/sam_autoleds.c
+ *
+ *   Copyright (C) 2015 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.
+ *
+ ****************************************************************************/
+
+/* LEDs
+ *
+ * There are two yellow LED available on the SAM V71 Xplained Ultra board that
+ * can be turned on and off.  The LEDs can be activated by driving the
+ * connected I/O line to GND.
+ *
+ *   ------ ----------- ---------------------
+ *   SAMV71 Function    Shared functionality
+ *   PIO
+ *   ------ ----------- ---------------------
+ *   PA23   Yellow LED0 EDBG GPIO
+ *   PC09   Yellow LED1 LCD, and Shield
+ *   ------ ----------- ---------------------
+ *
+ * These LEDs are not used by the board port unless CONFIG_ARCH_LEDS is
+ * defined.  In that case, the usage by the board port is defined in
+ * include/board.h and src/sam_autoleds.c. The LEDs are used to encode
+ * OS-related events as follows:
+ *
+ *   -------------------  -----------------------  -------- --------
+ *   SYMBOL                Meaning                     LED state
+ *                                                   LED0     LED1
+ *   -------------------  -----------------------  -------- --------
+ *   LED_STARTED          NuttX has been started     OFF      OFF
+ *   LED_HEAPALLOCATE     Heap has been allocated    OFF      OFF
+ *   LED_IRQSENABLED      Interrupts enabled         OFF      OFF
+ *   LED_STACKCREATED     Idle stack created         ON       OFF
+ *   LED_INIRQ            In an interrupt              No change
+ *   LED_SIGNAL           In a signal handler          No change
+ *   LED_ASSERTION        An assertion failed          No change
+ *   LED_PANIC            The system has crashed     N/C      Blinking
+ *   LED_IDLE             MCU is is sleep mode         Not used
+ *   -------------------  -----------------------  -------- --------
+ *
+ * Thus if LED0 is statically on, NuttX has successfully booted and is,
+ * apparently, running normally.  If LED1 is flashing at approximately
+ * 2Hz, then a fatal error has been detected and the system has halted.
+ *
+ * NOTE: That LED0 is not used after completion of booting and may
+ * be used by other board-specific logic.
+ */
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <debug.h>
+
+#include <nuttx/board.h>
+#include <arch/board/board.h>
+
+#include "sam_gpio.h"
+#include "samv71-xult.h"
+
+#ifdef CONFIG_ARCH_LEDS
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* CONFIG_DEBUG_LEDS enables debug output from this file (needs CONFIG_DEBUG
+ * with CONFIG_DEBUG_VERBOSE too)
+ */
+
+#ifdef CONFIG_DEBUG_LEDS
+#  define leddbg  lldbg
+#  define ledvdbg llvdbg
+#else
+#  define leddbg(x...)
+#  define ledvdbg(x...)
+#endif
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_led_initialize
+ ****************************************************************************/
+
+void board_led_initialize(void)
+{
+  /* Configure LED PIOs for output */
+
+  sam_configgpio(GPIO_LED0);
+  sam_configgpio(GPIO_LED1);
+}
+
+/****************************************************************************
+ * Name: board_led_on
+ ****************************************************************************/
+
+void board_led_on(int led)
+{
+  bool led0on = false;  /* High illuminates */
+  bool led1on = false; /* High illuminates */
+
+  switch (led)
+    {
+      case 0:  /* LED_STARTED, LED_HEAPALLOCATE, LED_IRQSENABLED */
+        break;
+
+      case 1:  /* LED_STACKCREATED */
+        led0on = true;
+        break;
+
+      default:
+      case 2:  /* LED_INIRQ, LED_SIGNAL, LED_ASSERTION */
+        return;
+
+      case 3:  /* LED_PANIC */
+        led1on = true;
+        break;
+    }
+
+  sam_gpiowrite(GPIO_LED0, led0on);
+  sam_gpiowrite(GPIO_LED1, led1on);
+}
+
+/****************************************************************************
+ * Name: board_led_off
+ ****************************************************************************/
+
+void board_led_off(int led)
+{
+  if (led != 2)
+    {
+      sam_gpiowrite(GPIO_LED0, false);  /* High illuminates */
+      sam_gpiowrite(GPIO_LED1, false);  /* High illuminates */
+    }
+}
+
+#endif /* CONFIG_ARCH_LEDS */
diff --git a/nuttx/configs/samv71-xult/src/sam_buttons.c b/nuttx/configs/samv71-xult/src/sam_buttons.c
new file mode 100644
index 0000000000..7be2dbae0b
--- /dev/null
+++ b/nuttx/configs/samv71-xult/src/sam_buttons.c
@@ -0,0 +1,207 @@
+/****************************************************************************
+ * configs/sam4e-ek/src/sam_buttons.c
+ *
+ *   Copyright (C) 2014-2015 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 <stdint.h>
+
+#include <nuttx/arch.h>
+#include <nuttx/board.h>
+#include <nuttx/irq.h>
+
+#include <arch/irq.h>
+#include <arch/board/board.h>
+
+#include "sam_gpio.h"
+#include "samv7i-xult.h"
+
+#ifdef CONFIG_ARCH_BUTTONS
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+#if defined(CONFIG_SAM34_GPIOA_IRQ) && defined(CONFIG_ARCH_IRQBUTTONS)
+static xcpt_t g_irq_sw0;
+static xcpt_t g_irq_sw1;
+#endif
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_button_irqx
+ *
+ * Description:
+ *   This function implements the core of the board_button_irq() logic.
+ *
+ ****************************************************************************/
+
+#if defined(CONFIG_SAM34_GPIOA_IRQ) && defined(CONFIG_ARCH_IRQBUTTONS)
+static xcpt_t board_button_irqx(gpio_pinset_t pinset, int irq,
+                                xcpt_t irqhandler, xcpt_t *store)
+{
+  xcpt_t oldhandler;
+  irqstate_t flags;
+
+  /* Disable interrupts until we are done.  This guarantees that the following
+   * operations are atomic.
+   */
+
+  flags = irqsave();
+
+  /* Get the old button interrupt handler and save the new one */
+
+  oldhandler = *store;
+  *store = irqhandler;
+
+  /* Are we attaching or detaching? */
+
+  if (irqhandler != NULL)
+    {
+      /* Configure the interrupt */
+
+      sam_gpioirq(pinset);
+      (void)irq_attach(irq, irqhandler);
+      sam_gpioirqenable(irq);
+    }
+  else
+    {
+      /* Detach and disable the interrupt */
+
+      (void)irq_detach(irq);
+      sam_gpioirqdisable(irq);
+    }
+
+  irqrestore(flags);
+
+  /* Return the old button handler (so that it can be restored) */
+
+  return oldhandler;
+}
+#endif
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_button_initialize
+ *
+ * Description:
+ *   board_button_initialize() must be called to initialize button resources.
+ *   After that, board_buttons() may be called to collect the current state
+ *   of all buttons or board_button_irq() may be called to register button
+ *   interrupt handlers.
+ *
+ ****************************************************************************/
+
+void board_button_initialize(void)
+{
+#warning Missing logic
+ *   - PB12 is set up as a system flash ERASE pin when the firmware boots. To
+ *     use the SW1, PB12 has to be configured as a normal regular I/O pin in
+ *     the MATRIX module. For more information see the SAM V71 datasheet.
+
+  (void)sam_configgpio(GPIO_SW0);
+  (void)sam_configgpio(GPIO_SW1);
+}
+
+/****************************************************************************
+ * Name: board_buttons
+ *
+ * Description:
+ *   After board_button_initialize() has been called, board_buttons() may be
+ *   called to collect the state of all buttons.  board_buttons() returns an
+ *   8-bit bit set with each bit associated with a button.  See the BUTTON*
+ *   definitions above for the meaning of each bit in the returned value.
+ *
+ ****************************************************************************/
+
+uint8_t board_buttons(void)
+{
+  uint8_t retval;
+
+  retval  = sam_gpioread(GPIO_SW0) ? 0 : BUTTON_SW0_BIT;
+  retval |= sam_gpioread(GPIO_SW1) ? 0 : BUTTON_SW1_BIT;
+
+  return retval;
+}
+
+/****************************************************************************
+ * Name: board_button_irq
+ *
+ * Description:
+ *   This function may be called to register an interrupt handler that will
+ *   be called when a button is depressed or released.  The ID value is one
+ *   of the BUTTON* definitions provided above. The previous interrupt
+ *   handler address is returned (so that it may restored, if so desired).
+ *
+ * Configuration Notes:
+ *   Configuration CONFIG_AVR32_GPIOIRQ must be selected to enable the
+ *   overall GPIO IRQ feature and CONFIG_AVR32_GPIOIRQSETA and/or
+ *   CONFIG_AVR32_GPIOIRQSETB must be enabled to select GPIOs to support
+ *   interrupts on.  For button support, bits 2 and 3 must be set in
+ *   CONFIG_AVR32_GPIOIRQSETB (PB2 and PB3).
+ *
+ ****************************************************************************/
+
+#if defined(CONFIG_SAM34_GPIOA_IRQ) && defined(CONFIG_ARCH_IRQBUTTONS)
+xcpt_t board_button_irq(int id, xcpt_t irqhandler)
+{
+  switch (id)
+    {
+      case BUTTON_SW0:
+        return board_button_irqx(GPIO_SW0, IRQ_SW0, irqhandler, &g_irq_sw0);
+
+      case BUTTON_SW1:
+        return board_button_irqx(GPIO_SW1, IRQ_SW1, irqhandler, &g_irq_sw1);
+
+      default:
+        return NULL;
+    }
+}
+#endif
+
+#endif /* CONFIG_ARCH_BUTTONS */
diff --git a/nuttx/configs/samv71-xult/src/sam_userleds.c b/nuttx/configs/samv71-xult/src/sam_userleds.c
index 74ac796a7c..465dca4bef 100644
--- a/nuttx/configs/samv71-xult/src/sam_userleds.c
+++ b/nuttx/configs/samv71-xult/src/sam_userleds.c
@@ -1,4 +1,4 @@
-/************************************************************************************
+/****************************************************************************
  * configs/samv71-xult/src/sam_userleds.c
  *
  *   Copyright (C) 2015 Gregory Nutt. All rights reserved.
@@ -31,24 +31,78 @@
  * 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 <stdint.h>
+#include <stdbool.h>
+#include <debug.h>
+
+#include <arch/board/board.h>
+
+#include "sam_gpio.h"
 #include "samv71-xult.h"
 
-/************************************************************************************
+/****************************************************************************
  * Pre-processor Definitions
- ************************************************************************************/
+ ****************************************************************************/
 
-/************************************************************************************
+/****************************************************************************
  * Private Functions
- ************************************************************************************/
+ ****************************************************************************/
 
-/************************************************************************************
+/****************************************************************************
  * Public Functions
- ************************************************************************************/
+ ****************************************************************************/
+/****************************************************************************
+ * Name: sam_ledinit
+ ****************************************************************************/
+
+void sam_ledinit(void)
+{
+  /* Configure LED PIOs for output */
+
+  sam_configgpio(GPIO_LED0);
+  sam_configgpio(GPIO_LED1);
+}
+
+/****************************************************************************
+ * Name: sam_setled
+ ****************************************************************************/
+
+void sam_setled(int led, bool ledon)
+{
+  uint32_t ledcfg;
+
+  if (led == BOARD_LED0)
+    {
+      ledcfg = GPIO_LED0;
+    }
+  else if (led == BOARD_LED1)
+    {
+      ledcfg = GPIO_LED1;
+    }
+  else
+    {
+      return;
+    }
+
+  sam_gpiowrite(ledcfg, !ledon); /* Low illuminates */
+}
+
+/****************************************************************************
+ * Name: sam_setleds
+ ****************************************************************************/
+
+void sam_setleds(uint8_t ledset)
+{
+  /* Hight illuminates */
+
+  sam_gpiowrite(GPIO_LED0, (ledset & BOARD_LED0_BIT) == 0);
+  sam_gpiowrite(GPIO_LED1, (ledset & BOARD_LED1_BIT) == 0);
+}
diff --git a/nuttx/configs/samv71-xult/src/samv71-xult.h b/nuttx/configs/samv71-xult/src/samv71-xult.h
index 66fde33e5c..ad24f47178 100644
--- a/nuttx/configs/samv71-xult/src/samv71-xult.h
+++ b/nuttx/configs/samv71-xult/src/samv71-xult.h
@@ -117,13 +117,59 @@
  */
 
 /* LEDs
- * To be provided
+ *
+ * There are two yellow LED available on the SAM V71 Xplained Ultra board that
+ * can be turned on and off.  The LEDs can be activated by driving the
+ * connected I/O line to GND.
+ *
+ *   ------ ----------- ---------------------
+ *   SAMV71 Function    Shared functionality
+ *   PIO
+ *   ------ ----------- ---------------------
+ *   PA23   Yellow LED0 EDBG GPIO
+ *   PC09   Yellow LED1 LCD, and Shield
+ *   ------ ----------- ---------------------
  */
 
+#define GPIO_LED0     (GPIO_OUTPUT | GPIO_CFG_DEFAULT | GPIO_OUTPUT_CLEAR | \
+                       GPIO_PORT_PIOA | GPIO_PIN23)
+#define GPIO_LED1     (GPIO_OUTPUT | GPIO_CFG_DEFAULT | GPIO_OUTPUT_CLEAR | \
+                       GPIO_PORT_PIOC | GPIO_PIN9)
+
 /* Buttons
- * To be provided
+ *
+ * SAM V71 Xplained Ultra contains three mechanical buttons. One button is the
+ * RESET button connected to the SAM V71 reset line and the others are generic
+ * user configurable buttons. When a button is pressed it will drive the I/O
+ * line to GND.
+ *
+ *   ------ ----------- ---------------------
+ *   SAMV71 Function    Shared functionality
+ *   PIO
+ *   ------ ----------- ---------------------
+ *   RESET  RESET       Trace, Shield, and EDBG
+ *   PA09   SW0         EDBG GPIO and Camera
+ *   PB12   SW1         EDBG SWD and Chip Erase
+ *   ------ ----------- ---------------------
+ *
+ * NOTES:
+ *
+ *   - There are no pull-up resistors connected to the generic user buttons so
+ *     it is necessary to enable the internal pull-up in the SAM V71 to use the
+ *     button.
+ *   - PB12 is set up as a system flash ERASE pin when the firmware boots. To
+ *     use the SW1, PB12 has to be configured as a normal regular I/O pin in
+ *     the MATRIX module. For more information see the SAM V71 datasheet.
  */
 
+#define GPIO_SW0      (GPIO_INPUT | GPIO_CFG_PULLUP | GPIO_CFG_DEGLITCH | \
+                       GPIO_INT_BOTHEDGES | GPIO_PORT_PIOA | GPIO_PIN9)
+#define GPIO_SW1      (GPIO_INPUT | GPIO_CFG_PULLUP | GPIO_CFG_DEGLITCH | \
+                       GPIO_INT_BOTHEDGES | GPIO_PORT_PIOB | GPIO_PIN12)
+
+#define IRQ_SW0       SAM_IRQ_PA9
+#define IRQ_SW1       SAM_IRQ_PB12
+
 /* HSMCI SD Card Detect
  * To be provided
  */