/**************************************************************************** * configs/sama5d4-ek/src/sam_autoleds.c * * Copyright (C) 2014 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 3 LEDs on the SAMA5D4-EK: * * ------------------------------ ------------------- ------------------------- * SAMA5D4 PIO SIGNAL USAGE * ------------------------------ ------------------- ------------------------- * PE28/NWAIT/RTS4/A19 1Wire_PE28 1-WIRE ROM, LCD, D8 (green) * PE8/A8/TCLK3/PWML3 LED_USER_PE8 LED_USER (D10) * PE9/A9/TIOA2 LED_POWER_PE9 LED_POWER (D9, Red) * ------------------------------ ------------------- ------------------------- * * - D8: D8 is shared with other functions and cannot be used if the 1-Wire ROM * is used. I am not sure of the LCD function, but the LED may not be available * if the LCD is used either. We will avoid using D8 just for simplicity. * - D10: Nothing special here. A low output illuminates. * - D9: The Power ON LED. Connects to the via an IRLML2502 MOSFET. This LED will * be on when power is applied but otherwise a low output value will turn it * off. * * 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 Meaning LED state * USER D10 POWER D9 * ------------------- ----------------------- -------- -------- * LED_STARTED NuttX has been started OFF ON * LED_HEAPALLOCATE Heap has been allocated OFF ON * LED_IRQSENABLED Interrupts enabled OFF ON * LED_STACKCREATED Idle stack created ON ON * LED_INIRQ In an interrupt No change * LED_SIGNAL In a signal handler No change * LED_ASSERTION An assertion failed No change * LED_PANIC The system has crashed OFF Blinking * LED_IDLE MCU is is sleep mode Not used * * Thus if the D0 and D9 are statically on, NuttX has successfully booted and * is, apparently, running normally. If the red D9 LED 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_pio.h" #include "sama5d4-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_LED_USER); sam_configpio(PIO_LED_POWER); } /**************************************************************************** * Name: board_led_on ****************************************************************************/ void board_led_on(int led) { switch (led) { default: case 0: /* LED_STARTED, LED_HEAPALLOCATE, LED_IRQSENABLED */ break; /* Leave USER LED off */ case 1: /* LED_STACKCREATED */ { /* User LED is ON (Low illuminates) */ sam_piowrite(PIO_LED_USER, false); } break; case 2: /* LED_INIRQ, LED_SIGNAL, LED_ASSERTION */ break; /* Ignored */ case 3: /* LED_PANIC */ { /* Power LED is ON (High illuminates) */ sam_piowrite(PIO_LED_POWER, true); } break; } } /**************************************************************************** * Name: board_led_off ****************************************************************************/ void board_led_off(int led) { switch (led) { default: case 0: /* LED_STARTED, LED_HEAPALLOCATE, LED_IRQSENABLED, */ case 1: /* LED_STACKCREATED */ break; /* Will not happen */ case 2: /* LED_INIRQ, LED_SIGNAL, LED_ASSERTION */ break; /* Ignored */ case 3: /* LED_PANIC */ { /* Power LED is OFF (High illuminates) */ sam_piowrite(PIO_LED_POWER, false); } break; } } #endif /* CONFIG_ARCH_LEDS */