led.cpp
3.05 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
/****************************************************************************
*
* Copyright (c) 2013 PX4 Development Team. All rights reserved.
*
* 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 PX4 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.
*
****************************************************************************/
/**
* @file led.cpp
*
* LED driver to control the onboard LED(s) via ioctl interface.
*/
#include <px4_platform_common/px4_config.h>
#include <lib/cdev/CDev.hpp>
#include <drivers/drv_board_led.h>
#include <stdio.h>
/*
* Ideally we'd be able to get these from arm_internal.h,
* but since we want to be able to disable the NuttX use
* of leds for system indication at will and there is no
* separate switch, we need to build independent of the
* CONFIG_ARCH_LEDS configuration switch.
*/
__BEGIN_DECLS
extern void led_init();
extern void led_on(int led);
extern void led_off(int led);
extern void led_toggle(int led);
__END_DECLS
class LED : cdev::CDev
{
public:
LED();
~LED() override = default;
int init() override;
int ioctl(cdev::file_t *filp, int cmd, unsigned long arg) override;
};
LED::LED() : CDev(LED0_DEVICE_PATH)
{
// force immediate init/device registration
init();
}
int
LED::init()
{
PX4_DEBUG("LED::init");
CDev::init();
led_init();
return 0;
}
int
LED::ioctl(cdev::file_t *filp, int cmd, unsigned long arg)
{
int result = OK;
switch (cmd) {
case LED_ON:
led_on(arg);
break;
case LED_OFF:
led_off(arg);
break;
case LED_TOGGLE:
led_toggle(arg);
break;
default:
result = CDev::ioctl(filp, cmd, arg);
}
return result;
}
namespace
{
LED *gLED;
}
void
drv_led_start(void)
{
if (gLED == nullptr) {
gLED = new LED;
}
}