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/****************************************************************************
* configs/sam4e-ek/src/sam_leds.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 <stdbool.h>
#include <debug.h>
#include <nuttx/board.h>
#include <arch/board/board.h>
#include "chip.h"
#include "up_arch.h"
#include "up_internal.h"
#include "sam_gpio.h"
#include "sam4e-ek.h"
#ifdef CONFIG_ARCH_LEDS
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* The SAM4E-EK board has three, user-controllable LEDs labelled D2 (blue),
* D3 (amber), and D4 (green) on the board. Usage of these LEDs is defined
* in include/board.h and src/up_leds.c. They are encoded as follows:
*
* SYMBOL Meaning D3* D2 D4
* ------------------- ----------------------- ------- ------- -------
* LED_STARTED NuttX has been started OFF OFF OFF
* LED_HEAPALLOCATE Heap has been allocated OFF OFF ON
* LED_IRQSENABLED Interrupts enabled OFF ON OFF
* LED_STACKCREATED Idle stack created OFF ON ON
* LED_INIRQ In an interrupt** N/C FLASH N/C
* LED_SIGNAL In a signal handler*** N/C N/C FLASH
* LED_ASSERTION An assertion failed FLASH N/C N/C
* LED_PANIC The system has crashed FLASH N/C N/C
*
* * If D2 and D4 are statically on, then NuttX probably failed to boot
* and these LEDs will give you some indication of where the failure was
* ** The normal state is D3=OFF, D4=ON and D2 faintly glowing. This faint
* glow is because of timer interrupts that result in the LED being
* illuminated on a small proportion of the time.
* *** D4 may also flicker normally if signals are processed.
*/
#define LED_OFF 0
#define LED_ON 1
#define LED_NOCHANGE 2
#define LED_MASK 3
#define D3_SHIFT 0
#define D3_OFF (LED_OFF << D3_SHIFT)
#define D3_ON (LED_ON << D3_SHIFT)
#define D3_NOCHANGE (LED_NOCHANGE << D3_SHIFT)
#define D2_SHIFT 2
#define D2_OFF (LED_OFF << D2_SHIFT)
#define D2_ON (LED_ON << D2_SHIFT)
#define D2_NOCHANGE (LED_NOCHANGE << D2_SHIFT)
#define D4_SHIFT 4
#define D4_OFF (LED_OFF << D4_SHIFT)
#define D4_ON (LED_ON << D4_SHIFT)
#define D4_NOCHANGE (LED_NOCHANGE << D4_SHIFT)
/* 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
****************************************************************************/
static const uint8_t g_ledon[8] =
{
(D3_OFF | D2_OFF | D4_OFF), /* LED_STARTED */
(D3_ON | D2_OFF | D4_ON), /* LED_HEAPALLOCATE */
(D3_OFF | D2_ON | D4_OFF), /* LED_IRQSENABLED */
(D3_ON | D2_ON | D4_ON), /* LED_STACKCREATED */
(D3_NOCHANGE | D2_OFF | D4_NOCHANGE), /* LED_INIRQ */
(D3_NOCHANGE | D2_NOCHANGE | D4_OFF), /* LED_SIGNAL */
(D3_ON | D2_NOCHANGE | D4_NOCHANGE), /* LED_ASSERTION */
(D3_ON | D2_NOCHANGE | D4_NOCHANGE) /* LED_PANIC */
};
static const uint8_t g_ledoff[8] =
{
(D3_OFF | D2_OFF | D4_OFF), /* LED_STARTED (does not happen) */
(D3_ON | D2_OFF | D4_ON), /* LED_HEAPALLOCATE (does not happen) */
(D3_OFF | D2_ON | D4_OFF), /* LED_IRQSENABLED (does not happen) */
(D3_ON | D2_ON | D4_ON), /* LED_STACKCREATED (does not happen) */
(D3_NOCHANGE | D2_ON | D4_NOCHANGE), /* LED_INIRQ */
(D3_NOCHANGE | D2_NOCHANGE | D4_ON), /* LED_SIGNAL */
(D3_OFF | D2_NOCHANGE | D4_NOCHANGE), /* LED_ASSERTION */
(D3_OFF | D2_NOCHANGE | D4_NOCHANGE) /* LED_PANIC */
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: sam_setled
****************************************************************************/
static void sam_setled(gpio_pinset_t pinset, uint8_t state)
{
/* Assume active high. Initial state == 0 means active high */
bool polarity = ((pinset & GPIO_OUTPUT_SET) == 0);
switch (state)
{
case LED_OFF:
polarity = !polarity;
case LED_ON:
break;
case LED_NOCHANGE:
default:
return;
}
sam_gpiowrite(pinset, polarity);
}
/****************************************************************************
* Name: sam_setleds
****************************************************************************/
static void sam_setleds(uint8_t state)
{
sam_setled(GPIO_D3, (state >> D3_SHIFT) & LED_MASK);
sam_setled(GPIO_D2, (state >> D2_SHIFT) & LED_MASK);
sam_setled(GPIO_D4, (state >> D4_SHIFT) & LED_MASK);
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: board_led_initialize
****************************************************************************/
void board_led_initialize(void)
{
(void)sam_configgpio(GPIO_D3);
(void)sam_configgpio(GPIO_D2);
(void)sam_configgpio(GPIO_D4);
}
/****************************************************************************
* Name: board_led_on
****************************************************************************/
void board_led_on(int led)
{
sam_setleds(g_ledon[led & 7]);
}
/****************************************************************************
* Name: board_led_off
****************************************************************************/
void board_led_off(int led)
{
sam_setleds(g_ledoff[led & 7]);
}
#endif /* CONFIG_ARCH_LEDS */
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