219 lines
7.7 KiB
C
219 lines
7.7 KiB
C
/****************************************************************************
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* boards/arm/sam34/flipnclick-sam3x/src/sam_autoleds.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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/* There are four LEDs on the top, blue side of the board.
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* Only one can be controlled by software:
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*
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* LED L - PB27 (PWM13)
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*
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* There are also four LEDs on the back, white side of the board:
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*
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* LED A - PC6
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* LED B - PC5
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* LED C - PC7
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* LED D - PC8
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*
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* A high output value illuminates the LEDs.
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*
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* These LEDs are available to the application and are all available to the
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* application unless CONFIG_ARCH_LEDS is defined. In that case, the usage
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* by the board port is defined in include/board.h and src/sam_autoleds.c.
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* The LEDs are used to encode OS-related events as follows:
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*
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* SYMBOL MEANING LED STATE
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* L A B C D
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* ---------------- ----------------------- --- --- --- --- ---
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* LED_STARTED NuttX has been started OFF ON OFF OFF OFF
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* LED_HEAPALLOCATE Heap has been allocated OFF OFF ON OFF OFF
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* LED_IRQSENABLED Interrupts enabled OFF OFF OFF ON OFF
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* LED_STACKCREATED Idle stack created OFF OFF OFF OFF ON
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* LED_INIRQ In an interrupt GLO N/C N/C N/C N/C
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* LED_SIGNAL In a signal handler GLO N/C N/C N/C N/C
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* LED_ASSERTION An assertion failed GLO N/C N/C N/C N/C
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* LED_PANIC The system has crashed 2Hz N/C N/C N/C N/C
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* LED_IDLE MCU is is sleep mode ---- Not used -----
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*
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* Thus if LED L is faintly glowing and all other LEDs are off (except LED
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* D which was left on but is no longer controlled by NuttX and so may be in
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* any state), NuttX has successfully booted and is, apparently, running
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* normally and taking interrupts. If any of LEDs A-D are statically set,
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* then NuttX failed to boot and the LED indicates the initialization phase
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* where the failure occurred. If LED L is flashing at approximately 2Hz,
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* then a fatal error has been detected and the system has halted.
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*
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* NOTE: After booting, LEDs A-D are no longer used by the system and may
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* be controlled the application.
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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 <assert.h>
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#include <debug.h>
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#include <nuttx/board.h>
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#include "chip.h"
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#include "sam_gpio.h"
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#include "flipnclick-sam3x.h"
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/* The board.h file may override pin configurations defined in sam_pinmap.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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* Processor Definitions
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****************************************************************************/
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/* LED indices */
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#define INDEX_LED_L 0
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#define INDEX_LED_A 1
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#define INDEX_LED_B 2
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#define INDEX_LED_C 3
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#define INDEX_LED_D 4
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#define NLEDS 5
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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static void board_autoled_setone(int ledndx)
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{
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bool ledon[NLEDS] =
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{
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false, false, false, false, false
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};
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ledon[ledndx] = true;
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sam_gpiowrite(GPIO_LED_L, ledon[INDEX_LED_L]);
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sam_gpiowrite(GPIO_LED_A, ledon[INDEX_LED_A]);
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sam_gpiowrite(GPIO_LED_B, ledon[INDEX_LED_B]);
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sam_gpiowrite(GPIO_LED_C, ledon[INDEX_LED_C]);
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sam_gpiowrite(GPIO_LED_D, ledon[INDEX_LED_D]);
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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 GPIOs for output */
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sam_configgpio(GPIO_LED_L);
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sam_configgpio(GPIO_LED_A);
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sam_configgpio(GPIO_LED_B);
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sam_configgpio(GPIO_LED_C);
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sam_configgpio(GPIO_LED_D);
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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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/* SYMBOL MEANING LED STATE
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* L A B C D
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* ------------------- ----------------------- --- --- --- --- ---
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* LED_STARTED 0 NuttX has been started OFF ON OFF OFF OFF
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* LED_HEAPALLOCATE 1 Heap has been allocated OFF OFF ON OFF OFF
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* LED_IRQSENABLED 2 Interrupts enabled OFF OFF OFF ON OFF
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* LED_STACKCREATED 3 Idle stack created OFF OFF OFF OFF ON
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* LED_INIRQ 4 In an interrupt GLO N/C N/C N/C N/C
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* LED_SIGNAL 4 In a signal handler GLO N/C N/C N/C N/C
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* LED_ASSERTION 4 An assertion failed GLO N/C N/C N/C N/C
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* LED_PANIC 4 The system has crashed 2Hz N/C N/C N/C N/C
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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:
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board_autoled_setone(INDEX_LED_A);
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break;
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case 1:
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board_autoled_setone(INDEX_LED_B);
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break;
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case 2:
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board_autoled_setone(INDEX_LED_C);
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break;
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case 3:
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board_autoled_setone(INDEX_LED_D);
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break;
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case 4:
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sam_gpiowrite(GPIO_LED_L, true);
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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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/* SYMBOL MEANING LED STATE
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* L A B C D
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* ------------------- ----------------------- --- --- --- --- ---
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* LED_STARTED 0 NuttX has been started OFF ON OFF OFF OFF
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* LED_HEAPALLOCATE 1 Heap has been allocated OFF OFF ON OFF OFF
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* LED_IRQSENABLED 2 Interrupts enabled OFF OFF OFF ON OFF
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* LED_STACKCREATED 3 Idle stack created OFF OFF OFF OFF ON
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* LED_INIRQ 4 In an interrupt GLO N/C N/C N/C N/C
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* LED_SIGNAL 4 In a signal handler GLO N/C N/C N/C N/C
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* LED_ASSERTION 4 An assertion failed GLO N/C N/C N/C N/C
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* LED_PANIC 4 The system has crashed 2Hz N/C N/C N/C N/C
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*/
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switch (led)
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{
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default:
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sam_gpiowrite(GPIO_LED_L, false);
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sam_gpiowrite(GPIO_LED_A, false);
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sam_gpiowrite(GPIO_LED_B, false);
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sam_gpiowrite(GPIO_LED_C, false);
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sam_gpiowrite(GPIO_LED_D, false);
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break;
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case 4:
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sam_gpiowrite(GPIO_LED_L, false);
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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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