/**************************************************************************** * configs/sama5d3x-ek/src/sam_autoleds.c * * Copyright (C) 2013-2015 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 two LEDs on the SAMA5D3 series-CM board that can be controlled * by software. A blue LED is controlled via PIO pins. A red LED normally * provides an indication that power is supplied to the board but can also * be controlled via software. * * PE25. This blue LED is pulled high and is illuminated by pulling PE25 * low. * * PE24. The red LED is also pulled high but is driven by a transistor so * that it is illuminated when power is applied even if PE24 is not * configured as an output. If PE24 is configured as an output, then the * LCD is illuminated by a low output. * * These LEDs are not used by the board port unless CONFIG_ARCH_LEDS is * defined. In that case, the usage by the board port is defined in * include/board.h and src/sam_leds.c. The LEDs are used to encode OS-related * events as follows: * * SYMBOL Val Meaning LED state * Blue Red * ----------------- --- ----------------------- -------- -------- * LED_STARTED 0 NuttX has been started OFF OFF * LED_HEAPALLOCATE 0 Heap has been allocated OFF OFF * LED_IRQSENABLED 0 Interrupts enabled OFF OFF * LED_STACKCREATED 1 Idle stack created ON OFF * LED_INIRQ 2 In an interrupt No change * LED_SIGNAL 2 In a signal handler No change * LED_ASSERTION 2 An assertion failed No change * LED_PANIC 3 The system has crashed OFF Blinking * LED_IDLE N/A MCU is is sleep mode Not used * * Thus if the blue LED is statically on, NuttX has successfully booted and * is, apparently, running normally. If the red 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 #include "sam_pio.h" #include "sama5d3x-ek.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) { /* Configure LED PIOs for output */ sam_configpio(PIO_BLUE); #ifndef CONFIG_SAMA5D3xEK_NOREDLED sam_configpio(PIO_RED); #endif } /**************************************************************************** * Name: board_led_on ****************************************************************************/ void board_led_on(int led) { bool blueoff = true; /* Low illuminates */ #ifndef CONFIG_SAMA5D3xEK_NOREDLED bool redon = false; /* High illuminates */ #endif switch (led) { case 0: /* LED_STARTED, LED_HEAPALLOCATE, LED_IRQSENABLED */ break; case 1: /* LED_STACKCREATED */ blueoff = false; break; default: case 2: /* LED_INIRQ, LED_SIGNAL, LED_ASSERTION */ return; case 3: /* LED_PANIC */ #ifdef CONFIG_SAMA5D3xEK_NOREDLED blueoff = false; #else redon = true; #endif break; } sam_piowrite(PIO_BLUE, blueoff); #ifndef CONFIG_SAMA5D3xEK_NOREDLED sam_piowrite(PIO_RED, redon); #endif } /**************************************************************************** * Name: board_led_off ****************************************************************************/ void board_led_off(int led) { if (led != 2) { sam_piowrite(PIO_BLUE, true); /* Low illuminates */ #ifndef CONFIG_SAMA5D3xEK_NOREDLED sam_piowrite(PIO_RED, false); /* High illuminates */ #endif } } #endif /* CONFIG_ARCH_LEDS */