168 lines
5.2 KiB
C
168 lines
5.2 KiB
C
/****************************************************************************
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* configs/teensy-2.0/src/at90usb_leds.c
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*
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* Copyright (C) 2011, 2013, 2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdbool.h>
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#include <debug.h>
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#include <avr/io.h>
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#include <nuttx/board.h>
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#include "up_arch.h"
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#include "up_internal.h"
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#include "at90usb.h"
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#include "teensy-20.h"
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#ifdef CONFIG_ARCH_LEDS
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static bool g_ncoff;
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: at90usb_led_initialize
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****************************************************************************/
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void at90usb_led_initialize(void)
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{
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/* The Teensy's single LED is on Port D, Pin 6. Configur this pin as an
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* output and turn it OFF. The "other" side of the LED is onnected to
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* ground through a resistor. Therefore, a logic value of 0 should turn
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* the LED off.
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*/
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DDRD |= (1 << 6);
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PORTD &= ~(1 << 6);
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g_ncoff = true;
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}
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/****************************************************************************
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* Name: board_autoled_on
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****************************************************************************/
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void board_autoled_on(int led)
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{
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/* ON OFF
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* LED_STARTED 0 OFF ON (never happens)
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* LED_HEAPALLOCATE 0 OFF ON (never happens)
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* LED_IRQSENABLED 0 OFF ON (never happens)
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* LED_STACKCREATED 1 ON ON (never happens)
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* LED_INIRQ 2 OFF NC (momentary)
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* LED_SIGNAL 2 OFF NC (momentary)
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* LED_ASSERTION 2 OFF NC (momentary)
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* LED_PANIC 0 OFF ON (1Hz flashing)
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*/
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switch (led)
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{
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case 0:
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/* The steady state is OFF */
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g_ncoff = true;
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case 2:
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/* Turn the LED off */
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PORTD &= ~(1 << 6);
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break;
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case 1:
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/* The steady state is ON */
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PORTD |= (1 << 6);
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g_ncoff = false;
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break;
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default:
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return;
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}
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}
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/****************************************************************************
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* Name: board_autoled_off
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****************************************************************************/
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void board_autoled_off(int led)
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{
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/* ON OFF
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* LED_STARTED 0 OFF ON (never happens)
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* LED_HEAPALLOCATE 0 OFF ON (never happens)
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* LED_IRQSENABLED 0 OFF ON (never happens)
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* LED_STACKCREATED 1 ON ON (never happens)
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* LED_INIRQ 2 OFF NC (momentary)
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* LED_SIGNAL 2 OFF NC (momentary)
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* LED_ASSERTION 2 OFF NC (momentary)
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* LED_PANIC 0 OFF ON (1Hz flashing)
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*/
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switch (led)
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{
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case 2:
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/* If the "no-change" state is OFF, then turn the LED off */
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if (g_ncoff)
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{
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PORTD &= ~(1 << 6);
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break;
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}
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/* Otherwise, fall through to turn the LED ON */
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case 0:
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case 1:
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/* Turn the LED on */
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PORTD |= (1 << 6);
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break;
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default:
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return;
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}
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}
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#endif /* CONFIG_ARCH_LEDS */
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