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Diffstat (limited to 'nuttx/configs/sam4l-xplained/src/sam_autoleds.c')
| -rw-r--r-- | nuttx/configs/sam4l-xplained/src/sam_autoleds.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/nuttx/configs/sam4l-xplained/src/sam_autoleds.c b/nuttx/configs/sam4l-xplained/src/sam_autoleds.c new file mode 100644 index 000000000..1ea1afbe4 --- /dev/null +++ b/nuttx/configs/sam4l-xplained/src/sam_autoleds.c @@ -0,0 +1,182 @@ +/**************************************************************************** + * configs/sam4l-xplained/src/sam_autoleds.c + * + * Copyright (C) 2013 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * 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 <nuttx/config.h> + +#include <stdint.h> +#include <stdbool.h> +#include <debug.h> + +#include <arch/board/board.h> + +#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 + +#define LED_OFF 0 +#define LED_ON 1 +#define LED_NOCHANGE 2 +#define LED_MASK 3 + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_ledinit + ****************************************************************************/ + +void up_ledinit(void) +{ + (void)sam_configgpio(GPIO_LED0); +} + +/**************************************************************************** + * Name: up_ledon + ****************************************************************************/ + +void up_ledon(int led) +{ + bool ledstate = true; + + switch (led) + { + case LED_STARTED : /* NuttX has been started LED0=OFF */ + case LED_HEAPALLOCATE: /* Heap has been allocated LED0=OFF */ + case LED_IRQSENABLED: /* Interrupts enabled LED0=OFF */ + break; /* Leave ledstate == true to turn OFF */ + + default: + case LED_INIRQ: /* In an interrupt LED0=N/C */ + case LED_SIGNAL: /* In a signal handler LED0=N/C */ + case LED_ASSERTION: /* An assertion failed LED0=N/C */ + return; + + case LED_PANIC: /* The system has crashed LED0=FLASH */ + case LED_STACKCREATED: /* Idle stack created LED0=ON */ + ledstate = false; /* Set ledstate == false to turn ON */ + break; + } + + sam_gpiowrite(GPIO_LED0, ledstate); +} + +/**************************************************************************** + * Name: up_ledoff + ****************************************************************************/ + +void up_ledoff(int led) +{ + switch (led) + { + /* These should not happen and are ignored */ + + default: + case LED_STARTED : /* NuttX has been started LED0=OFF */ + case LED_HEAPALLOCATE: /* Heap has been allocated LED0=OFF */ + case LED_IRQSENABLED: /* Interrupts enabled LED0=OFF */ + case LED_STACKCREATED: /* Idle stack created LED0=ON */ + + /* These result in no-change */ + + case LED_INIRQ: /* In an interrupt LED0=N/C */ + case LED_SIGNAL: /* In a signal handler LED0=N/C */ + case LED_ASSERTION: /* An assertion failed LED0=N/C */ + return; + + /* Turn LED0 off set driving the output high */ + + case LED_PANIC: /* The system has crashed LED0=FLASH */ + sam_gpiowrite(GPIO_LED0, true); + break; + } +} + +#endif /* CONFIG_ARCH_LEDS */ |