/**************************************************************************** * configs/sam4l-xplained/src/sam_autoleds.c * * Copyright (C) 2013 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name NuttX nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************/ /* There are three LEDs on board the SAM4L Xplained Pro board: The EDBG * controls two of the LEDs, a power LED and a status LED. There is only * one user controllable LED, a yellow LED labeled LED0 near the SAM4L USB * connector. * * This LED is controlled by PC07 and LED0 can be activated by driving the * PC07 to GND. * * When CONFIG_ARCH_LEDS is defined in the NuttX configuration, NuttX will * control LED0 as follows: * * SYMBOL Meaning LED0 * ------------------- ----------------------- ------ * LED_STARTED NuttX has been started OFF * LED_HEAPALLOCATE Heap has been allocated OFF * LED_IRQSENABLED Interrupts enabled OFF * LED_STACKCREATED Idle stack created ON * LED_INIRQ In an interrupt** N/C * LED_SIGNAL In a signal handler*** N/C * LED_ASSERTION An assertion failed N/C * LED_PANIC The system has crashed FLASH * * Thus is LED0 is statically on, NuttX has successfully booted and is, * apparently, running normmally. If LED0 is flashing at approximately * 2Hz, then a fatal error has been detected and the system has halted. */ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include "sam_gpio.h" #include "sam4l-xplained.h" #ifdef CONFIG_ARCH_LEDS /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* CONFIG_DEBUG_LEDS enables debug output from this file (needs CONFIG_DEBUG * with CONFIG_DEBUG_VERBOSE too) */ #ifdef CONFIG_DEBUG_LEDS # define leddbg lldbg # define ledvdbg llvdbg #else # define leddbg(x...) # define ledvdbg(x...) #endif /**************************************************************************** * Private Data ****************************************************************************/ /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: board_led_initialize ****************************************************************************/ void board_led_initialize(void) { (void)sam_configgpio(GPIO_LED0); } /**************************************************************************** * Name: board_led_on ****************************************************************************/ void board_led_on(int led) { bool ledstate = true; switch (led) { case 0: /* LED_STARTED: NuttX has been started LED0=OFF */ /* LED_HEAPALLOCATE: Heap has been allocated LED0=OFF */ /* LED_IRQSENABLED: Interrupts enabled LED0=OFF */ break; /* Leave ledstate == true to turn OFF */ default: case 2: /* LED_INIRQ: In an interrupt LED0=N/C */ /* LED_SIGNAL: In a signal handler LED0=N/C */ /* LED_ASSERTION: An assertion failed LED0=N/C */ return; /* Return to leave LED0 unchanged */ case 3: /* LED_PANIC: The system has crashed LED0=FLASH */ case 1: /* LED_STACKCREATED: Idle stack created LED0=ON */ ledstate = false; /* Set ledstate == false to turn ON */ break; } sam_gpiowrite(GPIO_LED0, ledstate); } /**************************************************************************** * Name: board_led_off ****************************************************************************/ void board_led_off(int led) { switch (led) { /* These should not happen and are ignored */ default: case 0: /* LED_STARTED: NuttX has been started LED0=OFF */ /* LED_HEAPALLOCATE: Heap has been allocated LED0=OFF */ /* LED_IRQSENABLED: Interrupts enabled LED0=OFF */ case 1: /* LED_STACKCREATED: Idle stack created LED0=ON */ /* These result in no-change */ case 2: /* LED_INIRQ: In an interrupt LED0=N/C */ /* LED_SIGNAL: In a signal handler LED0=N/C */ /* LED_ASSERTION: An assertion failed LED0=N/C */ return; /* Return to leave LED0 unchanged */ /* Turn LED0 off set driving the output high */ case 3: /* LED_PANIC: The system has crashed LED0=FLASH */ sam_gpiowrite(GPIO_LED0, true); break; } } #endif /* CONFIG_ARCH_LEDS */