/**************************************************************************** * configs/tm4c123g-launchpad/src/tm4c_leds.c * * Copyright (C) 2014-2015 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. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include "chip.h" #include "up_arch.h" #include "up_internal.h" #include "tiva_gpio.h" #include "tm4c123g-launchpad.h" /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* The TM4C123G LaunchPad has a single RGB LED. There is only one visible LED * which will vary in color. But, from the standpoint of the firmware, this * appears as three LEDs: * * BOARD_LED_R -- Connected to PF1 * BOARD_LED_G -- Connected to PF3 * BOARD_LED_B -- Connected to PF2 * * If CONFIG_ARCH_LEDS is defined, then automated support for the LaunchPad LEDs * will be included in the build: * * OFF: * - OFF means that the OS is still initializing. Initialization is very fast so * if you see this at all, it probably means that the system is hanging up * somewhere in the initialization phases. * * GREEN or GREEN-ish * - This means that the OS completed initialization. * * Bluish: * - Whenever and interrupt or signal handler is entered, the BLUE LED is * illuminated and extinguished when the interrupt or signal handler exits. * This will add a BLUE-ish tinge to the LED. * * Redish: * - If a recovered assertion occurs, the RED component will be illuminated * briefly while the assertion is handled. You will probably never see this. * * Flashing RED: * - In the event of a fatal crash, the BLUE and GREEN components will be * extinguished and the RED component will FLASH at a 2Hz rate. * * RED GREEN BLUE * LED_STARTED 0 OFF OFF OFF * LED_HEAPALLOCATE 0 OFF OFF OFF * LED_IRQSENABLED 0 OFF OFF OFF * LED_STACKCREATED 1 OFF ON OFF * LED_INIRQ 2 NC NC ON (momentary) * LED_SIGNAL 2 NC NC ON (momentary) * LED_ASSERTION 3 ON NC NC (momentary) * LED_PANIC 4 ON OFF OFF (flashing 2Hz) */ /* Dump GPIO registers */ #ifdef CONFIG_DEBUG_LEDS_INFO # define led_dumpgpio(m) tiva_dumpgpio(LED_GPIO, m) #else # define led_dumpgpio(m) #endif /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: tm4c_led_initialize * * Description: * Called to initialize the on-board LEDs. * ****************************************************************************/ #ifdef CONFIG_ARCH_LEDS void tm4c_led_initialize(void) { ledinfo("Initializing\n"); /* Configure Port E, Bit 1 as an output, initial value=OFF */ led_dumpgpio("tm4c_led_initialize before tiva_configgpio()"); tiva_configgpio(GPIO_LED_R); tiva_configgpio(GPIO_LED_G); tiva_configgpio(GPIO_LED_B); led_dumpgpio("tm4c_led_initialize after tiva_configgpio()"); } /**************************************************************************** * Name: board_autoled_on ****************************************************************************/ void board_autoled_on(int led) { switch (led) { /* All components stay off until the file initialization step */ default: case 0: break; /* The GREEN component is illuminated at the final initialization step */ case 1: tiva_gpiowrite(GPIO_LED_G, false); break; /* These will illuminate the BLUE component with on effect no RED and GREEN */ case 2: tiva_gpiowrite(GPIO_LED_B, false); break; /* This will turn off RED and GREEN and turn RED on */ case 4: tiva_gpiowrite(GPIO_LED_G, true); tiva_gpiowrite(GPIO_LED_B, true); /* This will illuminate the RED component with no effect on RED and GREEN */ case 3: tiva_gpiowrite(GPIO_LED_R, false); break; } } /**************************************************************************** * Name: board_autoled_off ****************************************************************************/ void board_autoled_off(int led) { switch (led) { /* These should not happen and are ignored */ default: case 0: case 1: break; /* These will extinguish the BLUE component with no effect on RED and GREEN */ case 2: tiva_gpiowrite(GPIO_LED_B, true); break; /* These will extinguish the RED component with on effect on RED and GREEN */ case 3: case 4: tiva_gpiowrite(GPIO_LED_R, true); break; } } #endif /* CONFIG_ARCH_LEDS */