191 lines
6.9 KiB
C
191 lines
6.9 KiB
C
/****************************************************************************
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* boards/arm/sam34/sam4e-ek/src/sam_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 <assert.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 "sam_gpio.h"
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#include "sam4e-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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/* The SAM4E-EK board has three, user-controllable LEDs labelled D2 (blue),
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* D3 (amber), and D4 (green) on the board. Usage of these LEDs is defined
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* in include/board.h and src/up_leds.c. They are encoded as follows:
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*
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* SYMBOL Meaning D3* D2 D4
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* ------------------- ----------------------- ------- ------- -------
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* LED_STARTED NuttX has been started OFF OFF OFF
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* LED_HEAPALLOCATE Heap has been allocated OFF OFF ON
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* LED_IRQSENABLED Interrupts enabled OFF ON OFF
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* LED_STACKCREATED Idle stack created OFF ON ON
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* LED_INIRQ In an interrupt** N/C FLASH N/C
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* LED_SIGNAL In a signal handler*** N/C N/C FLASH
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* LED_ASSERTION An assertion failed FLASH N/C N/C
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* LED_PANIC The system has crashed FLASH N/C N/C
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*
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* * If D2 and D4 are statically on, then NuttX probably failed to boot
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* and these LEDs will give you some indication of where the failure was
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* ** The normal state is D3=OFF, D4=ON and D2 faintly glowing. This faint
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* glow is because of timer interrupts that result in the LED being
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* illuminated on a small proportion of the time.
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* *** D4 may also flicker normally if signals are processed.
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*/
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#define LED_OFF 0
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#define LED_ON 1
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#define LED_NOCHANGE 2
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#define LED_MASK 3
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#define D3_SHIFT 0
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#define D3_OFF (LED_OFF << D3_SHIFT)
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#define D3_ON (LED_ON << D3_SHIFT)
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#define D3_NOCHANGE (LED_NOCHANGE << D3_SHIFT)
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#define D2_SHIFT 2
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#define D2_OFF (LED_OFF << D2_SHIFT)
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#define D2_ON (LED_ON << D2_SHIFT)
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#define D2_NOCHANGE (LED_NOCHANGE << D2_SHIFT)
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#define D4_SHIFT 4
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#define D4_OFF (LED_OFF << D4_SHIFT)
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#define D4_ON (LED_ON << D4_SHIFT)
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#define D4_NOCHANGE (LED_NOCHANGE << D4_SHIFT)
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static const uint8_t g_ledon[8] =
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{
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(D3_OFF | D2_OFF | D4_OFF), /* LED_STARTED */
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(D3_ON | D2_OFF | D4_ON), /* LED_HEAPALLOCATE */
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(D3_OFF | D2_ON | D4_OFF), /* LED_IRQSENABLED */
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(D3_ON | D2_ON | D4_ON), /* LED_STACKCREATED */
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(D3_NOCHANGE | D2_OFF | D4_NOCHANGE), /* LED_INIRQ */
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(D3_NOCHANGE | D2_NOCHANGE | D4_OFF), /* LED_SIGNAL */
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(D3_ON | D2_NOCHANGE | D4_NOCHANGE), /* LED_ASSERTION */
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(D3_ON | D2_NOCHANGE | D4_NOCHANGE) /* LED_PANIC */
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};
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static const uint8_t g_ledoff[8] =
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{
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(D3_OFF | D2_OFF | D4_OFF), /* LED_STARTED (does not happen) */
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(D3_ON | D2_OFF | D4_ON), /* LED_HEAPALLOCATE (does not happen) */
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(D3_OFF | D2_ON | D4_OFF), /* LED_IRQSENABLED (does not happen) */
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(D3_ON | D2_ON | D4_ON), /* LED_STACKCREATED (does not happen) */
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(D3_NOCHANGE | D2_ON | D4_NOCHANGE), /* LED_INIRQ */
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(D3_NOCHANGE | D2_NOCHANGE | D4_ON), /* LED_SIGNAL */
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(D3_OFF | D2_NOCHANGE | D4_NOCHANGE), /* LED_ASSERTION */
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(D3_OFF | D2_NOCHANGE | D4_NOCHANGE) /* LED_PANIC */
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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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* Name: sam_setled
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****************************************************************************/
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static void sam_setled(gpio_pinset_t pinset, uint8_t state)
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{
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/* Assume active high. Initial state == 0 means active high */
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bool polarity = ((pinset & GPIO_OUTPUT_SET) == 0);
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switch (state)
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{
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case LED_OFF:
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polarity = !polarity;
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case LED_ON:
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break;
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case LED_NOCHANGE:
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default:
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return;
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}
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sam_gpiowrite(pinset, polarity);
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}
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/****************************************************************************
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* Name: sam_setleds
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****************************************************************************/
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static void sam_setleds(uint8_t state)
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{
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sam_setled(GPIO_D3, (state >> D3_SHIFT) & LED_MASK);
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sam_setled(GPIO_D2, (state >> D2_SHIFT) & LED_MASK);
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sam_setled(GPIO_D4, (state >> D4_SHIFT) & LED_MASK);
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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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sam_configgpio(GPIO_D3);
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sam_configgpio(GPIO_D2);
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sam_configgpio(GPIO_D4);
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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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sam_setleds(g_ledon[led & 7]);
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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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sam_setleds(g_ledoff[led & 7]);
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}
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#endif /* CONFIG_ARCH_LEDS */
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