Paparazzi UAS  v5.15_devel-81-gd13dafb
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 {
39  bool enabled;
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,
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 
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
char enable_path[PWM_SYSFS_PATH_LEN]
path to enable file
Definition: pwm_sysfs.h:41
void pwm_sysfs_set_duty(struct PWM_Sysfs *pwm, uint32_t duty)
Definition: pwm_sysfs.c:101
void pwm_sysfs_enable(struct PWM_Sysfs *pwm, bool enable)
Definition: pwm_sysfs.c:114
#define PWM_SYSFS_PATH_LEN
Definition: pwm_sysfs.h:32
int duty_cycle_fd
file descriptor to write/update duty cycle
Definition: pwm_sysfs.h:40
unsigned long uint32_t
Definition: types.h:18
void pwm_sysfs_set_period(struct PWM_Sysfs *pwm, uint32_t period)
Definition: pwm_sysfs.c:91
PWM structure.
Definition: pwm_sysfs.h:36
uint32_t duty_cycle_nsec
current duty cycle (in nsec)
Definition: pwm_sysfs.h:37
unsigned char uint8_t
Definition: types.h:14
uint32_t period_nsec
current period (in nsec)
Definition: pwm_sysfs.h:38
char duty_path[PWM_SYSFS_PATH_LEN]
path to duty file
Definition: pwm_sysfs.h:42
char period_path[PWM_SYSFS_PATH_LEN]
path to period file
Definition: pwm_sysfs.h:43
bool enabled
true if pwm is enabled
Definition: pwm_sysfs.h:39
static uint8_t channel
Definition: ADS8344.c:80