text: /****************************************************************************
   * boards/arm/lpc17xx_40xx/lpc4088-quickstart/src/lpc17_40_autoleds.c
   *
   *   Copyright (C) 2013, 2015 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.
   *
   ****************************************************************************/
  
  /****************************************************************************
   * Included Files
   ****************************************************************************/
  
  #include <nuttx/config.h>
  
  #include <stdint.h>
  #include <stdbool.h>
  #include <debug.h>
  
  #include <nuttx/board.h>
  #include <arch/board/board.h>
  
  #include "chip.h"
  #include "arm_arch.h"
  #include "arm_internal.h"
  
  #include "lpc17_40_gpio.h"
  #include "lpc4088-quickstart.h"
  
  /****************************************************************************
   * Pre-processor Definitions
   ****************************************************************************/
  
  /* If CONFIG_ARCH_LEDS is not defined, then the user can control the LEDs in
   * any way.  The following definitions are used to access individual LEDs.
   *
   * These LEDs are driven through a PNP transistor so a low output value will
   * illuminate them.
   *
   * LED1 : Connected to P1[18]
   * LED2 : Connected to P0[13]
   *
   * These LEDs are connected to ground so a high output value will illuminate
   * them.
   *
   * LED3 : Connected to P1[13]
   * LED4 : Connected to P2[19]
   *
  
   *
   * If CONFIG_ARCH_LEDs is defined, then NuttX will control the four LEDs
   * on the LPC4088 Quickstart Board.  The following definitions describe how
   * NuttX controls the LEDs:
   *
   *                                 LED1 LED2 LED3 LED4
   *   LED_STARTED                0  OFF  OFF  OFF  OFF
   *   LED_HEAPALLOCATE           1  ON   OFF  OFF  OFF
   *   LED_IRQSENABLED            2  OFF   ON  OFF  OFF
   *   LED_STACKCREATED           3  ON    ON  OFF  OFF
   *   LED_INIRQ                  4  LED3 glows, on while in interrupt
   *   LED_SIGNAL                 4  LED3 glows, on while in signal handler
   *   LED_ASSERTION              4  LED3 glows, on while in assertion
   *   LED_PANIC                  4  LED3 Flashes at 2Hz
   *   LED_IDLE                   5  LED4 glows, ON while sleeping
   */
  
  /* The following definitions map the encoded LED setting to GPIO settings */
  
  #define LPC4088_QUICKSTART_LED1     (1 << 0)
  #define LPC4088_QUICKSTART_LED2     (1 << 1)
  #define LPC4088_QUICKSTART_LED3     (1 << 2)
  #define LPC4088_QUICKSTART_LED4     (1 << 3)
  
  #define ON_SETBITS_SHIFT  (0)
  #define ON_CLRBITS_SHIFT  (4)
  #define OFF_SETBITS_SHIFT (8)
  #define OFF_CLRBITS_SHIFT (12)
  
  #define ON_BITS(v)        ((v) & 0xff)
  #define OFF_BITS(v)       (((v) >> 8) & 0x0ff)
  #define SETBITS(b)        ((b) & 0x0f)
  #define CLRBITS(b)        (((b) >> 4) & 0x0f)
  
  #define ON_SETBITS(v)     (SETBITS(ON_BITS(v))
  #define ON_CLRBITS(v)     (CLRBITS(ON_BITS(v))
  #define OFF_SETBITS(v)    (SETBITS(OFF_BITS(v))
  #define OFF_CLRBITS(v)    (CLRBITS(OFF_BITS(v))
  
  #define LED_STARTED_ON_SETBITS       ((0) << ON_SETBITS_SHIFT)
  #define LED_STARTED_ON_CLRBITS       ((LPC4088_QUICKSTART_LED1|LPC4088_QUICKSTART_LED2|LPC4088_QUICKSTART_LED3|LPC4088_QUICKSTART_LED4) << ON_CLRBITS_SHIFT)
  #define LED_STARTED_OFF_SETBITS      (0 << OFF_SETBITS_SHIFT)
  #define LED_STARTED_OFF_CLRBITS      ((LPC4088_QUICKSTART_LED1|LPC4088_QUICKSTART_LED2|LPC4088_QUICKSTART_LED3|LPC4088_QUICKSTART_LED4) << OFF_CLRBITS_SHIFT)
  
  #define LED_HEAPALLOCATE_ON_SETBITS  ((LPC4088_QUICKSTART_LED1) << ON_SETBITS_SHIFT)
  #define LED_HEAPALLOCATE_ON_CLRBITS  ((LPC4088_QUICKSTART_LED2|LPC4088_QUICKSTART_LED3|LPC4088_QUICKSTART_LED4) << ON_CLRBITS_SHIFT)
  #define LED_HEAPALLOCATE_OFF_SETBITS (0 << OFF_SETBITS_SHIFT)
  #define LED_HEAPALLOCATE_OFF_CLRBITS ((LPC4088_QUICKSTART_LED1|LPC4088_QUICKSTART_LED2|LPC4088_QUICKSTART_LED3|LPC4088_QUICKSTART_LED4) << OFF_CLRBITS_SHIFT)
  
  #define LED_IRQSENABLED_ON_SETBITS   ((LPC4088_QUICKSTART_LED2) << ON_SETBITS_SHIFT)
  #define LED_IRQSENABLED_ON_CLRBITS   ((LPC4088_QUICKSTART_LED1|LPC4088_QUICKSTART_LED3|LPC4088_QUICKSTART_LED4) << ON_CLRBITS_SHIFT)
  #define LED_IRQSENABLED_OFF_SETBITS  ((LPC4088_QUICKSTART_LED1) << OFF_SETBITS_SHIFT)
  #define LED_IRQSENABLED_OFF_CLRBITS  ((LPC4088_QUICKSTART_LED2|LPC4088_QUICKSTART_LED3|LPC4088_QUICKSTART_LED4) << OFF_CLRBITS_SHIFT)
  
  #define LED_STACKCREATED_ON_SETBITS  ((LPC4088_QUICKSTART_LED1|LPC4088_QUICKSTART_LED2) << ON_SETBITS_SHIFT)
  #define LED_STACKCREATED_ON_CLRBITS  ((LPC4088_QUICKSTART_LED3|LPC4088_QUICKSTART_LED4) << ON_CLRBITS_SHIFT)
  #define LED_STACKCREATED_OFF_SETBITS ((LPC4088_QUICKSTART_LED2) << OFF_SETBITS_SHIFT)
  #define LED_STACKCREATED_OFF_CLRBITS ((LPC4088_QUICKSTART_LED1|LPC4088_QUICKSTART_LED3|LPC4088_QUICKSTART_LED4) << OFF_CLRBITS_SHIFT)
  
  #define LED_EVENT_ON_SETBITS         ((LPC4088_QUICKSTART_LED3) << ON_SETBITS_SHIFT)
  #define LED_EVENT_ON_CLRBITS         ((0) << ON_CLRBITS_SHIFT)
  #define LED_EVENT_OFF_SETBITS        ((0) << OFF_SETBITS_SHIFT)
  #define LED_EVENT_OFF_CLRBITS        ((LPC4088_QUICKSTART_LED3) << OFF_CLRBITS_SHIFT)
  
  #define LED_IDLE_ON_SETBITS          ((0) << ON_SETBITS_SHIFT)
  #define LED_IDLE_ON_CLRBITS          ((LPC4088_QUICKSTART_LED4) << ON_CLRBITS_SHIFT)
  #define LED_IDLE_OFF_SETBITS         ((LPC4088_QUICKSTART_LED4) << OFF_SETBITS_SHIFT)
  #define LED_IDLE_OFF_CLRBITS         ((0) << OFF_CLRBITS_SHIFT)
  
  /* Dump GPIO registers */
  
  #ifdef CONFIG_DEBUG_LEDS_INFO
  #  define led_dumpgpio(m) lpc17_40_dumpgpio(???, m)
  #else
  #  define led_dumpgpio(m)
  #endif
  
  /****************************************************************************
   * Private Data
   ****************************************************************************/
  
  /****************************************************************************
   * Private Data
   ****************************************************************************/
  
  static const uint16_t g_ledbits[8] =
  {
    (LED_STARTED_ON_SETBITS       | LED_STARTED_ON_CLRBITS |
     LED_STARTED_OFF_SETBITS      | LED_STARTED_OFF_CLRBITS),
  
    (LED_HEAPALLOCATE_ON_SETBITS  | LED_HEAPALLOCATE_ON_CLRBITS |
     LED_HEAPALLOCATE_OFF_SETBITS | LED_HEAPALLOCATE_OFF_CLRBITS),
  
    (LED_IRQSENABLED_ON_SETBITS   | LED_IRQSENABLED_ON_CLRBITS |
     LED_IRQSENABLED_OFF_SETBITS  | LED_IRQSENABLED_OFF_CLRBITS),
  
    (LED_STACKCREATED_ON_SETBITS  | LED_STACKCREATED_ON_CLRBITS |
     LED_STACKCREATED_OFF_SETBITS | LED_STACKCREATED_OFF_CLRBITS),
  
    (LED_EVENT_ON_SETBITS         | LED_EVENT_ON_CLRBITS |
     LED_EVENT_OFF_SETBITS        | LED_EVENT_OFF_CLRBITS),
  
    (LED_IDLE_ON_SETBITS          | LED_IDLE_ON_CLRBITS |
     LED_IDLE_OFF_SETBITS         | LED_IDLE_OFF_CLRBITS)
  };
  
  /****************************************************************************
   * Private Functions
   ****************************************************************************/
  
  static inline void led_clrbits(unsigned int clrbits)
  {
    if ((clrbits & LPC4088_QUICKSTART_LED1) != 0)
      {
        lpc17_40_gpiowrite(GPIO_LED1, true);
      }
  
    if ((clrbits & LPC4088_QUICKSTART_LED2) != 0)
      {
        lpc17_40_gpiowrite(GPIO_LED2, true);
      }
  
    if ((clrbits & LPC4088_QUICKSTART_LED3) != 0)
      {
        lpc17_40_gpiowrite(GPIO_LED3, false);
      }
  
    if ((clrbits & LPC4088_QUICKSTART_LED4) != 0)
      {
        lpc17_40_gpiowrite(GPIO_LED4, false);
      }
  }
  
  static inline void led_setbits(unsigned int setbits)
  {
    if ((setbits & LPC4088_QUICKSTART_LED1) != 0)
      {
        lpc17_40_gpiowrite(GPIO_LED1, false);
      }
  
    if ((setbits & LPC4088_QUICKSTART_LED2) != 0)
      {
        lpc17_40_gpiowrite(GPIO_LED2, false);
      }
  
    if ((setbits & LPC4088_QUICKSTART_LED3) != 0)
      {
        lpc17_40_gpiowrite(GPIO_LED3, true);
      }
  
    if ((setbits & LPC4088_QUICKSTART_LED4) != 0)
      {
        lpc17_40_gpiowrite(GPIO_LED4, true);
      }
  }
  
  static void led_setonoff(unsigned int bits)
  {
    led_clrbits(CLRBITS(bits));
    led_setbits(SETBITS(bits));
  }
  
  /****************************************************************************
   * Public Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Name: board_autoled_initialize
   ****************************************************************************/
  
  void board_autoled_initialize(void)
  {
    /* Configure LED1-4 GPIOs for output */
  
    lpc17_40_configgpio(GPIO_LED1);
    lpc17_40_configgpio(GPIO_LED2);
    lpc17_40_configgpio(GPIO_LED3);
    lpc17_40_configgpio(GPIO_LED4);
  }
  
  /****************************************************************************
   * Name: board_autoled_on
   ****************************************************************************/
  
  void board_autoled_on(int led)
  {
    led_setonoff(ON_BITS(g_ledbits[led]));
  }
  
  /****************************************************************************
   * Name: board_autoled_off
   ****************************************************************************/
  
  void board_autoled_off(int led)
  {
    led_setonoff(OFF_BITS(g_ledbits[led]));
  }
  