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/****************************************************************************
* configs/sam4l-xplained/src/sam_autoleds.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.
*
****************************************************************************/
/* 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.
*/
/****************************************************************************
* 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 "sam4l-xplained.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: up_ledinit
****************************************************************************/
void up_ledinit(void)
{
(void)sam_configgpio(GPIO_LED0);
}
/****************************************************************************
* Name: up_ledon
****************************************************************************/
void up_ledon(int led)
{
bool ledstate = true;
switch (led)
{
case 0: /* LED_STARTED: NuttX has been started LED0=OFF */
/* LED_HEAPALLOCATE: Heap has been allocated LED0=OFF */
/* LED_IRQSENABLED: Interrupts enabled LED0=OFF */
break; /* Leave ledstate == true to turn OFF */
default:
case 2: /* LED_INIRQ: In an interrupt LED0=N/C */
/* LED_SIGNAL: In a signal handler LED0=N/C */
/* LED_ASSERTION: An assertion failed LED0=N/C */
return; /* Return to leave LED0 unchanged */
case 3: /* LED_PANIC: The system has crashed LED0=FLASH */
case 1: /* LED_STACKCREATED: Idle stack created LED0=ON */
ledstate = false; /* Set ledstate == false to turn ON */
break;
}
sam_gpiowrite(GPIO_LED0, ledstate);
}
/****************************************************************************
* Name: up_ledoff
****************************************************************************/
void up_ledoff(int led)
{
switch (led)
{
/* These should not happen and are ignored */
default:
case 0: /* LED_STARTED: NuttX has been started LED0=OFF */
/* LED_HEAPALLOCATE: Heap has been allocated LED0=OFF */
/* LED_IRQSENABLED: Interrupts enabled LED0=OFF */
case 1: /* LED_STACKCREATED: Idle stack created LED0=ON */
/* These result in no-change */
case 2: /* LED_INIRQ: In an interrupt LED0=N/C */
/* LED_SIGNAL: In a signal handler LED0=N/C */
/* LED_ASSERTION: An assertion failed LED0=N/C */
return; /* Return to leave LED0 unchanged */
/* Turn LED0 off set driving the output high */
case 3: /* LED_PANIC: The system has crashed LED0=FLASH */
sam_gpiowrite(GPIO_LED0, true);
break;
}
}
#endif /* CONFIG_ARCH_LEDS */
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