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136 lines
3.1 KiB
C++
136 lines
3.1 KiB
C++
/****************************************************************************
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*
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* Copyright (c) 2013 PX4 Development Team. All rights reserved.
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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 PX4 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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* @file led.cpp
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*
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* LED driver.
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*/
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#include <px4_config.h>
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#include <drivers/drv_board_led.h>
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#include <stdio.h>
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#include "VirtDevObj.hpp"
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using namespace DriverFramework;
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/*
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* Ideally we'd be able to get these from up_internal.h,
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* but since we want to be able to disable the NuttX use
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* of leds for system indication at will and there is no
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* separate switch, we need to build independent of the
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* CONFIG_ARCH_LEDS configuration switch.
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*/
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__BEGIN_DECLS
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extern void led_init();
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extern void led_on(int led);
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extern void led_off(int led);
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extern void led_toggle(int led);
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__END_DECLS
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class LED : public VirtDevObj
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{
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public:
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LED();
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virtual ~LED() = default;
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virtual int init();
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virtual int devIOCTL(unsigned long cmd, unsigned long arg);
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protected:
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virtual void _measure() {}
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};
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LED::LED() :
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VirtDevObj("led", "/dev/ledsim", LED_BASE_DEVICE_PATH, 0)
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{
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// force immediate init/device registration
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init();
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}
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int
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LED::init()
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{
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int ret = VirtDevObj::init();
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if (ret == 0) {
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led_init();
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}
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return ret;
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}
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int
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LED::devIOCTL(unsigned long cmd, unsigned long arg)
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{
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int result = OK;
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switch (cmd) {
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case LED_ON:
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led_on(arg);
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break;
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case LED_OFF:
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led_off(arg);
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break;
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case LED_TOGGLE:
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led_toggle(arg);
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break;
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default:
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result = VirtDevObj::devIOCTL(cmd, arg);
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}
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return result;
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}
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namespace
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{
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LED *gLED;
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}
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void
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drv_led_start(void)
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{
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if (gLED == nullptr) {
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gLED = new LED;
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if (gLED != nullptr) {
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gLED->init();
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}
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}
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}
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