6a3c2aded6
* Simplify EINTR/ECANCEL error handling 1. Add semaphore uninterruptible wait function 2 .Replace semaphore wait loop with a single uninterruptible wait 3. Replace all sem_xxx to nxsem_xxx * Unify the void cast usage 1. Remove void cast for function because many place ignore the returned value witout cast 2. Replace void cast for variable with UNUSED macro
164 lines
6.1 KiB
C
164 lines
6.1 KiB
C
/****************************************************************************
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* boards/arm/samd2l2/samd21-xplained/src/sam_autoleds.c
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*
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* Copyright (C) 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 SAMD21 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 labelled STATUS near the SAMD21 USB
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* connector.
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*
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* This LED is controlled by PB30 and the LED can be activated by driving PB30
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* 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 the LED as follows:
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*
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* SYMBOL Meaning LED
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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 if the LED is statically on, NuttX has successfully booted and is,
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* apparently, running normally. If the LED 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_port.h"
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#include "samd21-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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sam_configport(PORT_STATUS_LED);
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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 STATUS LED=OFF
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* LED_HEAPALLOCATE: Heap has been allocated STATUS LED=OFF
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* LED_IRQSENABLED: Interrupts enabled STATUS LED=OFF
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*/
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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 STATUS LED=N/C
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* LED_SIGNAL: In a signal handler STATUS LED=N/C
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* LED_ASSERTION: An assertion failed STATUS LED=N/C
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*/
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return; /* Return to leave STATUS LED unchanged */
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case 3: /* LED_PANIC: The system has crashed STATUS LED=FLASH */
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case 1: /* LED_STACKCREATED: Idle stack created STATUS LED=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_portwrite(PORT_STATUS_LED, 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 STATUS LED=OFF
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* LED_HEAPALLOCATE: Heap has been allocated STATUS LED=OFF
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* LED_IRQSENABLED: Interrupts enabled STATUS LED=OFF
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*/
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case 1: /* LED_STACKCREATED: Idle stack created STATUS LED=ON */
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/* These result in no-change */
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case 2: /* LED_INIRQ: In an interrupt STATUS LED=N/C
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* LED_SIGNAL: In a signal handler STATUS LED=N/C
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* LED_ASSERTION: An assertion failed STATUS LED=N/C
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*/
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return; /* Return to leave STATUS LED unchanged */
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/* Turn STATUS LED off set driving the output high */
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case 3: /* LED_PANIC: The system has crashed STATUS LED=FLASH */
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sam_portwrite(PORT_STATUS_LED, 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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