182 lines
5.6 KiB
C
182 lines
5.6 KiB
C
/****************************************************************************
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* configs/imxrt1050-evk/include/imxrt_autoleds.c
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*
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* Copyright (C) 2018 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 four LED status indicators located on the EVK Board. The
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* functions of these LEDs include:
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*
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* - Main Power Supply(D3)
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* Green: DC 5V main supply is normal.
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* Red: J2 input voltage is over 5.6V.
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* Off: The board is not powered.
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* - Reset RED LED(D15)
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* - OpenSDA LED(D16)
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* - USER LED(D18)
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*
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* Only a single LED, D18, is under software control.
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*
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* This LED is 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/imxrt_autoleds.c. The LED is used to encode
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* OS-related events as follows:
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*
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* -------------------- ----------------------- ------
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* SYMBOL Meaning LED
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* -------------------- ----------------------- ------
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*
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* LED_STARTED 0 NuttX has been started OFF
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* LED_HEAPALLOCATE 0 Heap has been allocated OFF
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* LED_IRQSENABLED 0 Interrupts enabled OFF
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* LED_STACKCREATED 1 Idle stack created ON
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* LED_INIRQ 2 In an interrupt N/C
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* LED_SIGNAL 2 In a signal handler N/C
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* LED_ASSERTION 2 An assertion failed N/C
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* LED_PANIC 3 The system has crashed FLASH
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* LED_IDLE Not used
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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 <nuttx/board.h>
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#include "imxrt_gpio.h"
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#include "imxrt_iomuxc.h"
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#include "imxrt1050-evk.h"
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#include <arch/board/board.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: imxrt_autoled_initialize
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*
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* Description:
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* Initialize NuttX-controlled LED logic
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*
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* Input Parameters:
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* None
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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void imxrt_autoled_initialize(void)
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{
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/* Configure LED GPIO for output */
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imxrt_config_gpio(GPIO_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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* Description:
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* Turn on the "logical" LED state
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*
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* Input Parameters:
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* led - Identifies the "logical" LED state (see definitions in
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* include/board.h)
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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void board_autoled_on(int led)
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{
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bool ledoff = false;
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switch (led)
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{
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case 0: /* LED Off */
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ledoff = true;
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break;
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case 2: /* LED No change */
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return;
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case 1: /* LED On */
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case 3: /* LED On */
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break;
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}
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imxrt_gpio_write(GPIO_LED, ledoff); /* Low illuminates */
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}
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/****************************************************************************
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* Name: board_autoled_off
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*
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* Description:
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* Turn off the "logical" LED state
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*
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* Input Parameters:
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* led - Identifies the "logical" LED state (see definitions in
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* include/board.h)
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*
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* Returned Value:
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* None
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*
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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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case 0: /* LED Off */
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case 1: /* LED Off */
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case 3: /* LED Off */
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break;
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case 2: /* LED No change */
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return;
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}
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imxrt_gpio_write(GPIO_LED, true); /* Low illuminates */
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}
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#endif /* CONFIG_ARCH_LEDS */
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