139 lines
4.9 KiB
C
139 lines
4.9 KiB
C
/****************************************************************************
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* boards/arm/efm32/efm32gg-stk3700/src/efm32_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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/* The EFM32 Giant Gecko Start Kit has two yellow LEDs marked LED0 and LED1.
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* These LEDs are controlled by GPIO pins on the EFM32. The LEDs are
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* connected to pins PE2 and PE3 in an active high configuration:
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*
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* ------------------------------------- --------------------
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* EFM32 PIN BOARD SIGNALS
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* ------------------------------------- --------------------
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* E2/BCK_VOUT/EBI_A09 #0/ MCU_PE2 UIF_LED0
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* TIM3_CC2 #1/U1_TX #3/ACMP0_O #1
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* E3/BCK_STAT/EBI_A10 #0/U1_RX #3/ MCU_PE3 UIF_LED1
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* ACMP1_O #1
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* ------------------------------------- --------------------
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*
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* All LEDs are grounded and so are illuminated by outputting a high
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* value to the LED.
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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/efm32_autoleds.c. The LEDs are used to
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* encode OS-related events as follows:
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*
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* SYMBOL Meaning LED state
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* LED0 LED1
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* ------------------- ----------------------- -------- --------
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* LED_STARTED NuttX has been started OFF OFF
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* LED_HEAPALLOCATE Heap has been allocated OFF OFF
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* LED_IRQSENABLED Interrupts enabled OFF OFF
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* LED_STACKCREATED Idle stack created ON OFF
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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 STM32 is is sleep mode Not used
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*
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* Thus if LED0 statically on, NuttX has successfully booted and is,
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* apparently, running normally. If LED1 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 <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 "efm32_gpio.h"
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#include "efm32gg-stk3700.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: 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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efm32_configgpio(GPIO_LED0);
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efm32_configgpio(GPIO_LED1);
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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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bool led0on = false; /* High illuminates */
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bool led1on = false; /* High illuminates */
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switch (led)
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{
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case 0: /* LED_STARTED, LED_HEAPALLOCATE, LED_IRQSENABLED */
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break;
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case 1: /* LED_STACKCREATED */
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led0on = true;
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break;
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default:
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case 2: /* LED_INIRQ, LED_SIGNAL, LED_ASSERTION */
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return;
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case 3: /* LED_PANIC */
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led1on = true;
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break;
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}
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efm32_gpiowrite(GPIO_LED0, led0on);
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efm32_gpiowrite(GPIO_LED1, led1on);
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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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if (led != 2)
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{
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efm32_gpiowrite(GPIO_LED0, false); /* High illuminates */
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efm32_gpiowrite(GPIO_LED1, false); /* High illuminates */
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}
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}
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#endif /* CONFIG_ARCH_LEDS */
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