190 lines
5.3 KiB
C
190 lines
5.3 KiB
C
/****************************************************************************
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* boards/arm/lpc17xx_40xx/mbed/src/lpc17_40_leds.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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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 "chip.h"
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#include "arm_internal.h"
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#include "lpc17_40_gpio.h"
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#include "mbed.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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/* Dump GPIO registers */
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#ifdef CONFIG_DEBUG_LEDS_INFO
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# define led_dumpgpio(m) lpc17_40_dumpgpio(MBED_LED3, m)
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#else
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# define led_dumpgpio(m)
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#endif
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/* LED definitions **********************************************************/
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/* The MBED has 4 LEDs along the bottom of the board. Blue or off.
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* If CONFIG_ARCH_LEDS is defined, the LEDs will be controlled as follows for
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* NuttX debug functionality (where NC means "No Change").
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*
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* During the boot phases.
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* LED1 and LED2 will show boot status.
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* LED3/4 Not used.
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*
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* LED1 LED2
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* STARTED OFF OFF
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* HEAPALLOCATE BLUE OFF
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* IRQSENABLED OFF BLUE
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* STACKCREATED OFF OFF
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*
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* After the system is booted, this logic will no longer use LEDs 1 & 2.
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* They are available together with LED3 for use the application software
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* using lpc17_40_led (prototyped below)
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*/
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static bool g_initialized;
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static int g_nestcount = 0;
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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 all LED GPIO lines */
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led_dumpgpio("board_autoled_initialize() Entry)");
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lpc17_40_configgpio(MBED_LED1);
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lpc17_40_configgpio(MBED_LED2);
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lpc17_40_configgpio(MBED_LED3);
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lpc17_40_configgpio(MBED_LED4);
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led_dumpgpio("board_autoled_initialize() Exit");
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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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/* We will control LED1 and LED2 not yet completed the boot sequence. */
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if (!g_initialized)
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{
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int led1 = 0;
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int led2 = 0;
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switch (led)
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{
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case LED_STACKCREATED:
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g_initialized = true;
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case LED_STARTED:
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default:
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break;
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case LED_HEAPALLOCATE:
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led1 = 1;
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break;
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case LED_IRQSENABLED:
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led2 = 1;
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}
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lpc17_40_led(MBED_LED1, led1);
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lpc17_40_led(MBED_LED2, led2);
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}
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/* We will always control the HB LED */
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switch (led)
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{
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case LED_INIRQ:
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case LED_SIGNAL:
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case LED_ASSERTION:
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case LED_PANIC:
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lpc17_40_gpiowrite(MBED_HEARTBEAT, false);
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g_nestcount++;
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default:
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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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/* In all states, OFF can only mean turning off the HB LED */
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if (g_nestcount <= 1)
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{
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lpc17_40_led(MBED_HEARTBEAT, true);
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g_nestcount = 0;
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}
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else
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{
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g_nestcount--;
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}
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}
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/****************************************************************************
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* Name: lpc17_40_led
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*
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* Description:
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* Once the system has booted, these functions can be used to control
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* the LEDs
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*
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****************************************************************************/
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void lpc17_40_led(int lednum, int state)
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{
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lpc17_40_gpiowrite(lednum, state);
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}
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#endif /* CONFIG_ARCH_LEDS */
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