/****************************************************************************
* configs/teensy/src/up_leds.c
* arch/arm/src/board/up_leds.c
*
* Copyright (C) 2011, 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdbool.h>
#include <debug.h>
#include <avr/io.h>
#include "up_arch.h"
#include "up_internal.h"
#include "at90usb_internal.h"
#include "teensy_internal.h"
#ifdef CONFIG_ARCH_LEDS
/****************************************************************************
* 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
# ifdef CONFIG_DEBUG_VERBOSE
# define ledvdbg lldbg
# else
# define ledvdbg(x...)
# endif
#else
# define leddbg(x...)
# define ledvdbg(x...)
#endif
/****************************************************************************
* Private Data
****************************************************************************/
static bool g_ncoff;
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: at90usb_ledinit
****************************************************************************/
void at90usb_ledinit(void)
{
/* The Teensy's single LED is on Port D, Pin 6. Configur this pin as an
* output and turn it OFF. The "other" side of the LED is onnected to
* ground through a resistor. Therefore, a logic value of 0 should turn
* the LED off.
*/
DDRD |= (1 << 6);
PORTD &= ~(1 << 6);
g_ncoff = true;
}
/****************************************************************************
* Name: board_led_on
****************************************************************************/
void board_led_on(int led)
{
/* ON OFF
* LED_STARTED 0 OFF ON (never happens)
* LED_HEAPALLOCATE 0 OFF ON (never happens)
* LED_IRQSENABLED 0 OFF ON (never happens)
* LED_STACKCREATED 1 ON ON (never happens)
* LED_INIRQ 2 OFF NC (momentary)
* LED_SIGNAL 2 OFF NC (momentary)
* LED_ASSERTION 2 OFF NC (momentary)
* LED_PANIC 0 OFF ON (1Hz flashing)
*/
switch (led)
{
case 0:
/* The steady state is OFF */
g_ncoff = true;
case 2:
/* Turn the LED off */
PORTD &= ~(1 << 6);
break;
case 1:
/* The steady state is ON */
PORTD |= (1 << 6);
g_ncoff = false;
break;
default:
return;
}
}
/****************************************************************************
* Name: board_led_off
****************************************************************************/
void board_led_off(int led)
{
/* ON OFF
* LED_STARTED 0 OFF ON (never happens)
* LED_HEAPALLOCATE 0 OFF ON (never happens)
* LED_IRQSENABLED 0 OFF ON (never happens)
* LED_STACKCREATED 1 ON ON (never happens)
* LED_INIRQ 2 OFF NC (momentary)
* LED_SIGNAL 2 OFF NC (momentary)
* LED_ASSERTION 2 OFF NC (momentary)
* LED_PANIC 0 OFF ON (1Hz flashing)
*/
switch (led)
{
case 2:
/* If the "no-change" state is OFF, then turn the LED off */
if (g_ncoff)
{
PORTD &= ~(1 << 6);
break;
}
/* Otherwise, fall through to turn the LED ON */
case 0:
case 1:
/* Turn the LED on */
PORTD |= (1 << 6);
break;
default:
return;
}
}
#endif /* CONFIG_ARCH_LEDS */
