Paparazzi UAS  v5.18.0_stable
Paparazzi is a free software Unmanned Aircraft System.
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pwm_sysfs.h
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1 /*
2  * Copyright (C) 2017 Gautier Hattenberger <gautier.hattenberger@enac.fr>
3  *
4  * This file is part of Paparazzi.
5  *
6  * Paparazzi is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2, or (at your option)
9  * any later version.
10  *
11  * Paparazzi is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with paparazzi; see the file COPYING. If not, see
18  * <http://www.gnu.org/licenses/>.
19  */
20 
27 #ifndef PWM_SYSFS_H
28 #define PWM_SYSFS_H
29 
30 #include "std.h"
31 
32 #define PWM_SYSFS_PATH_LEN 64
33 
36 struct PWM_Sysfs {
37  uint32_t duty_cycle_nsec;
38  uint32_t period_nsec;
39  bool enabled;
40  int duty_cycle_fd;
41  char enable_path[PWM_SYSFS_PATH_LEN];
42  char duty_path[PWM_SYSFS_PATH_LEN];
43  char period_path[PWM_SYSFS_PATH_LEN];
44 };
45 
46 extern int pwm_sysfs_init(struct PWM_Sysfs *pwm, char *base_path,
47  char *_export, char *_enable,
48  char *_duty, char *_period,
49  uint8_t channel);
50 extern void pwm_sysfs_set_period(struct PWM_Sysfs *pwm, uint32_t period);
51 extern void pwm_sysfs_set_duty(struct PWM_Sysfs *pwm, uint32_t duty);
52 extern void pwm_sysfs_enable(struct PWM_Sysfs *pwm, bool enable);
53 
54 #endif
55 
channel
static uint8_t channel
Definition: ADS8344.c:80
PWM_Sysfs::enable_path
char enable_path[PWM_SYSFS_PATH_LEN]
path to enable file
Definition: pwm_sysfs.h:41
uint32_t
unsigned long uint32_t
Definition: types.h:18
PWM_Sysfs::duty_path
char duty_path[PWM_SYSFS_PATH_LEN]
path to duty file
Definition: pwm_sysfs.h:42
std.h
pwm_sysfs_init
int pwm_sysfs_init(struct PWM_Sysfs *pwm, char *base_path, char *_export, char *_enable, char *_duty, char *_period, uint8_t channel)
Definition: pwm_sysfs.c:52
uint8_t
unsigned char uint8_t
Definition: types.h:14
PWM_Sysfs::period_path
char period_path[PWM_SYSFS_PATH_LEN]
path to period file
Definition: pwm_sysfs.h:43
pwm_sysfs_set_duty
void pwm_sysfs_set_duty(struct PWM_Sysfs *pwm, uint32_t duty)
Definition: pwm_sysfs.c:101
PWM_Sysfs::duty_cycle_fd
int duty_cycle_fd
file descriptor to write/update duty cycle
Definition: pwm_sysfs.h:40
PWM_Sysfs::enabled
bool enabled
true if pwm is enabled
Definition: pwm_sysfs.h:39
pwm
timer subsystem PPM input on SERVO6 pin actuators pwm(if PWM_USE_TIM1) TIM8 radio_control/ppm(if USE_PPM_TIM8)(non-advanced timers using RCC_APB2) TIM2 adc(if USE_AD_TIM2
PWM_Sysfs::duty_cycle_nsec
uint32_t duty_cycle_nsec
current duty cycle (in nsec)
Definition: pwm_sysfs.h:37
PWM_Sysfs::period_nsec
uint32_t period_nsec
current period (in nsec)
Definition: pwm_sysfs.h:38
pwm_sysfs_set_period
void pwm_sysfs_set_period(struct PWM_Sysfs *pwm, uint32_t period)
Definition: pwm_sysfs.c:91
PWM_Sysfs
PWM structure.
Definition: pwm_sysfs.h:36
pwm_sysfs_enable
void pwm_sysfs_enable(struct PWM_Sysfs *pwm, bool enable)
Definition: pwm_sysfs.c:114
PWM_SYSFS_PATH_LEN
#define PWM_SYSFS_PATH_LEN
Definition: pwm_sysfs.h:32