195 lines
7.2 KiB
C
195 lines
7.2 KiB
C
/****************************************************************************
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* configs/sama5d4-ek/src/sam_autoleds.c
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*
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* Copyright (C) 2014-2015 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 3 LEDs on the SAMA5D4-EK:
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*
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* ------------------------------ ------------------- -------------------------
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* SAMA5D4 PIO SIGNAL USAGE
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* ------------------------------ ------------------- -------------------------
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* PE28/NWAIT/RTS4/A19 1Wire_PE28 1-WIRE ROM, LCD, D8 (green)
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* PE8/A8/TCLK3/PWML3 LED_USER_PE8 LED_USER (D10)
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* PE9/A9/TIOA2 LED_POWER_PE9 LED_POWER (D9, Red)
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* ------------------------------ ------------------- -------------------------
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*
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* - D8: D8 is shared with other functions and cannot be used if the 1-Wire ROM
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* is used. I am not sure of the LCD function, but the LED may not be available
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* if the LCD is used either. We will avoid using D8 just for simplicity.
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* - D10: Nothing special here. A low output illuminates.
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* - D9: The Power ON LED. Connects to the via an IRLML2502 MOSFET. This LED will
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* be on when power is applied but otherwise a low output value will turn it
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* off.
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*
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* These LEDs are not used by the board port unless CONFIG_ARCH_LEDS is
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* defined. In that case, the usage by the board port is defined in
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* include/board.h and src/sam_leds.c. The LEDs are used to encode OS-related
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* events as follows:
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*
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* SYMBOL Meaning LED state
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* USER D10 POWER D9
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* ------------------- ----------------------- -------- --------
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* LED_STARTED NuttX has been started OFF ON
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* LED_HEAPALLOCATE Heap has been allocated OFF ON
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* LED_IRQSENABLED Interrupts enabled OFF ON
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* LED_STACKCREATED Idle stack created ON ON
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* LED_INIRQ In an interrupt No change
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* LED_SIGNAL In a signal handler No change
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* LED_ASSERTION An assertion failed No change
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* LED_PANIC The system has crashed OFF Blinking
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* LED_IDLE MCU is is sleep mode Not used
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*
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* Thus if the D0 and D9 are statically on, NuttX has successfully booted and
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* is, apparently, running normally. If the red D9 LED is flashing at
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* approximately 2Hz, then a fatal error has been detected and the system
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* 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_pio.h"
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#include "sama5d4-ek.h"
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#ifdef CONFIG_ARCH_LEDS
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* CONFIG_DEBUG_LEDS enables debug output from this file (needs CONFIG_DEBUG
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* with CONFIG_DEBUG_VERBOSE too)
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*/
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#ifdef CONFIG_DEBUG_LEDS
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# define leddbg lldbg
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# define ledvdbg llvdbg
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#else
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# define leddbg(x...)
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# define ledvdbg(x...)
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#endif
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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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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/* Configure LED PIOs for output */
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sam_configpio(PIO_LED_USER);
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sam_configpio(PIO_LED_POWER);
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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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switch (led)
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{
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default:
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case 0: /* LED_STARTED, LED_HEAPALLOCATE, LED_IRQSENABLED */
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break; /* Leave USER LED off */
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case 1: /* LED_STACKCREATED */
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{
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/* User LED is ON (Low illuminates) */
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sam_piowrite(PIO_LED_USER, false);
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}
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break;
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case 2: /* LED_INIRQ, LED_SIGNAL, LED_ASSERTION */
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break; /* Ignored */
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case 3: /* LED_PANIC */
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{
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/* Power LED is ON (High illuminates) */
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sam_piowrite(PIO_LED_POWER, true);
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}
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break;
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}
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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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default:
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case 0: /* LED_STARTED, LED_HEAPALLOCATE, LED_IRQSENABLED, */
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case 1: /* LED_STACKCREATED */
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break; /* Will not happen */
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case 2: /* LED_INIRQ, LED_SIGNAL, LED_ASSERTION */
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break; /* Ignored */
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case 3: /* LED_PANIC */
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{
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/* Power LED is OFF (High illuminates) */
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sam_piowrite(PIO_LED_POWER, false);
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}
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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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