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+/************************************************************************************
+ * configs/sam3uek_eval/src/sam4l-xplained.h
+ *
+ *   Copyright (C) 2009-2011, 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.
+ *
+ ************************************************************************************/
+
+#ifndef __CONFIGS_SAM4L_XPLAINED_SRC_SAM4L_XPLAINED_H
+#define __CONFIGS_SAM4L_XPLAINED_SRC_SAM4L_XPLAINED_H
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/compiler.h>
+
+#include <stdint.h>
+
+#include <arch/irq.h>
+#include <nuttx/irq.h>
+
+#include "chip/sam_pinmap.h"
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+/* LEDs: There are three LEDs on board the SAM4L Xplained Pro board:  The EDBG
+ * controls two of the LEDs, a power LED and a status LED.  There is only
+ * one user controllable LED, a yellow LED labeled LED0 near the SAM4L USB
+ * connector.
+ *
+ * This LED is controlled by PC07 and LED0 can be activated by driving the
+ * PC07 to GND.
+ *
+ * When CONFIG_ARCH_LEDS is defined in the NuttX configuration, NuttX will
+ * control LED0 as follows:
+ *
+ *   SYMBOL              Meaning                 LED0
+ *   ------------------- ----------------------- ------
+ *   LED_STARTED         NuttX has been started  OFF
+ *   LED_HEAPALLOCATE    Heap has been allocated OFF
+ *   LED_IRQSENABLED     Interrupts enabled      OFF
+ *   LED_STACKCREATED    Idle stack created      ON
+ *   LED_INIRQ           In an interrupt         N/C
+ *   LED_SIGNAL          In a signal handler     N/C
+ *   LED_ASSERTION       An assertion failed     N/C
+ *   LED_PANIC           The system has crashed  FLASH
+ *
+ * Thus is LED0 is statically on, NuttX has successfully  booted and is,
+ * apparently, running normmally.  If LED0 is flashing at approximately
+ * 2Hz, then a fatal error has been detected and the system has halted.
+ */
+
+#define GPIO_LED0     (GPIO_OUTPUT | GPIO_CFG_DEFAULT | GPIO_PORT_PIOC | \
+                       GPIO_OUTPUT_SET | GPIO_PIN7)
+
+/* QTouch button: The SAM4L Xplained Pro kit has one QTouch button.  The connection
+ * to the SAM4L is:
+ *
+ *   PC13 CATB_SENSE15
+ *   PC14 CATB_DIS
+ */
+
+/* Mechanical buttons:
+ *
+ * The SAM4L Xplained Pro contains two mechanical buttons. One button is the
+ * RESET button connected to the SAM4L reset line and the other is a generic user
+ * configurable button. When a button is pressed it will drive the I/O line to GND.
+ *
+ *   PC24 SW0
+ */
+
+#define GPIO_SW0      (GPIO_INPUT | GPIO_CFG_PULLUP | GPIO_CFG_DEGLITCH | \
+                       GPIO_PORT_PIOC | GPIO_PIN24)
+#define IRQ_SW0       SAM_IRQ_PC24
+
+/************************************************************************************
+ * Public Types
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public data
+ ************************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: sam_spiinitialize
+ *
+ * Description:
+ *   Called to configure SPI chip select GPIO pins for the SAM3U-EK board.
+ *
+ ************************************************************************************/
+
+void weak_function sam_spiinitialize(void);
+
+/****************************************************************************
+ * Name: up_ledinit
+ ****************************************************************************/
+
+#ifdef CONFIG_ARCH_LEDS
+void up_ledinit(void);
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif /* __CONFIGS_SAM4L_XPLAINED_SRC_SAM4L_XPLAINED_H */
+