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pwm.c
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pwm.c
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/**
* @section License
*
* The MIT License (MIT)
*
* Copyright (c) 2014-2017, Erik Moqvist
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* This file is part of the Simba project.
*/
#include "simba.h"
#if CONFIG_PWM == 1
#include "pwm_port.i"
int pwm_module_init()
{
return (0);
}
int pwm_init(struct pwm_driver_t *self_p,
struct pwm_device_t *dev_p,
long frequency,
long duty_cycle)
{
ASSERTN(self_p != NULL, EINVAL);
ASSERTN(dev_p != NULL, EINVAL);
self_p->dev_p = dev_p;
self_p->frequency = frequency;
self_p->duty_cycle = duty_cycle;
return (pwm_port_init(self_p, dev_p));
}
int pwm_start(struct pwm_driver_t *self_p)
{
ASSERTN(self_p != NULL, EINVAL);
if (pwm_set_frequency(self_p, self_p->frequency) != 0) {
return (-1);
}
return (pwm_set_duty_cycle(self_p, self_p->duty_cycle));
}
int pwm_stop(struct pwm_driver_t *self_p)
{
ASSERTN(self_p != NULL, EINVAL);
return (pwm_set_duty_cycle(self_p, 0));
}
int pwm_set_frequency(struct pwm_driver_t *self_p,
long value)
{
ASSERTN(self_p != NULL, EINVAL);
self_p->frequency = value;
return (pwm_port_set_frequency(self_p, value));
}
long pwm_get_frequency(struct pwm_driver_t *self_p)
{
ASSERTN(self_p != NULL, EINVAL);
return (self_p->frequency);
}
int pwm_set_duty_cycle(struct pwm_driver_t *self_p,
long value)
{
ASSERTN(self_p != NULL, EINVAL);
self_p->duty_cycle = value;
return (pwm_port_set_duty_cycle(self_p, value));
}
long pwm_get_duty_cycle(struct pwm_driver_t *self_p)
{
ASSERTN(self_p != NULL, EINVAL);
return (self_p->duty_cycle);
}
long pwm_duty_cycle(int percentage)
{
return (pwm_port_duty_cycle(percentage));
}
int pwm_duty_cycle_as_percent(long value)
{
return (pwm_port_duty_cycle_as_percent(value));
}
long pwm_frequency(int hertz)
{
return (pwm_port_frequency(hertz));
}
int pwm_frequency_as_hertz(long value)
{
return (pwm_port_frequency_as_hertz(value));
}
struct pwm_device_t *pwm_pin_to_device(struct pin_device_t *pin_p)
{
ASSERTNRN(pin_p != NULL, EINVAL);
int i;
for (i = 0; i < PWM_DEVICE_MAX; i++) {
if (pwm_device[i].pin_dev_p == pin_p) {
return (&pwm_device[i]);
}
}
return (NULL);
}
#endif