155 lines
6.2 KiB
C
155 lines
6.2 KiB
C
/****************************************************************************
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* configs/sam4l-xplained/src/sam_autoleds.c
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*
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* Copyright (C) 201, 2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/* There are three LEDs on board the SAM4L Xplained Pro board: The EDBG
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* controls two of the LEDs, a power LED and a status LED. There is only
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* one user controllable LED, a yellow LED labeled LED0 near the SAM4L USB
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* connector.
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*
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* This LED is controlled by PC07 and LED0 can be activated by driving the
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* PC07 to GND.
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*
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* When CONFIG_ARCH_LEDS is defined in the NuttX configuration, NuttX will
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* control LED0 as follows:
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*
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* SYMBOL Meaning LED0
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* ------------------- ----------------------- ------
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* LED_STARTED NuttX has been started OFF
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* LED_HEAPALLOCATE Heap has been allocated OFF
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* LED_IRQSENABLED Interrupts enabled OFF
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* LED_STACKCREATED Idle stack created ON
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* LED_INIRQ In an interrupt** N/C
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* LED_SIGNAL In a signal handler*** N/C
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* LED_ASSERTION An assertion failed N/C
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* LED_PANIC The system has crashed FLASH
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*
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* Thus is LED0 is statically on, NuttX has successfully booted and is,
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* apparently, running normally. If LED0 is flashing at approximately
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* 2Hz, then a fatal error has been detected and the system has halted.
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*/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <debug.h>
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#include <nuttx/board.h>
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#include <arch/board/board.h>
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#include "sam_gpio.h"
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#include "sam4l-xplained.h"
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#ifdef CONFIG_ARCH_LEDS
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: board_autoled_initialize
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****************************************************************************/
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void board_autoled_initialize(void)
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{
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(void)sam_configgpio(GPIO_LED0);
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}
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/****************************************************************************
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* Name: board_autoled_on
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****************************************************************************/
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void board_autoled_on(int led)
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{
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bool ledstate = true;
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switch (led)
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{
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case 0: /* LED_STARTED: NuttX has been started LED0=OFF */
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/* LED_HEAPALLOCATE: Heap has been allocated LED0=OFF */
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/* LED_IRQSENABLED: Interrupts enabled LED0=OFF */
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break; /* Leave ledstate == true to turn OFF */
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default:
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case 2: /* LED_INIRQ: In an interrupt LED0=N/C */
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/* LED_SIGNAL: In a signal handler LED0=N/C */
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/* LED_ASSERTION: An assertion failed LED0=N/C */
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return; /* Return to leave LED0 unchanged */
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case 3: /* LED_PANIC: The system has crashed LED0=FLASH */
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case 1: /* LED_STACKCREATED: Idle stack created LED0=ON */
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ledstate = false; /* Set ledstate == false to turn ON */
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break;
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}
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sam_gpiowrite(GPIO_LED0, ledstate);
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}
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/****************************************************************************
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* Name: board_autoled_off
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****************************************************************************/
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void board_autoled_off(int led)
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{
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switch (led)
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{
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/* These should not happen and are ignored */
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default:
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case 0: /* LED_STARTED: NuttX has been started LED0=OFF */
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/* LED_HEAPALLOCATE: Heap has been allocated LED0=OFF */
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/* LED_IRQSENABLED: Interrupts enabled LED0=OFF */
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case 1: /* LED_STACKCREATED: Idle stack created LED0=ON */
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/* These result in no-change */
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case 2: /* LED_INIRQ: In an interrupt LED0=N/C */
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/* LED_SIGNAL: In a signal handler LED0=N/C */
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/* LED_ASSERTION: An assertion failed LED0=N/C */
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return; /* Return to leave LED0 unchanged */
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/* Turn LED0 off set driving the output high */
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case 3: /* LED_PANIC: The system has crashed LED0=FLASH */
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sam_gpiowrite(GPIO_LED0, true);
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break;
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}
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}
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#endif /* CONFIG_ARCH_LEDS */
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