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/**
* \file
*
* \brief PWM functionality implementation.
*
* Copyright (c) 2015-2018 Microchip Technology Inc. and its subsidiaries.
*
* \asf_license_start
*
* \page License
*
* Subject to your compliance with these terms, you may use Microchip
* software and any derivatives exclusively with Microchip products.
* It is your responsibility to comply with third party license terms applicable
* to your use of third party software (including open source software) that
* may accompany Microchip software.
*
* THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
* WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
* INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
* AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
* LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
* LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
* SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
* POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT
* ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
* RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
* THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
*
* \asf_license_stop
*
*/
#include "hal_pwm.h"
#include <utils_assert.h>
#include <utils.h>
/**
* \brief Driver version
*/
#define DRIVER_VERSION 0x00000001u
static void pwm_period_expired(struct _pwm_device *device);
static void pwm_detect_fault(struct _pwm_device *device);
/**
* \brief Initialize pwm
*/
int32_t pwm_init(struct pwm_descriptor *const descr, void *const hw, struct _pwm_hpl_interface *const func)
{
ASSERT(descr && hw && func);
descr->func = func;
descr->func->init(&descr->device, hw);
descr->device.callback.pwm_period_cb = pwm_period_expired;
descr->device.callback.pwm_error_cb = pwm_detect_fault;
return ERR_NONE;
}
/**
* \brief Deinitialize pwm
*/
int32_t pwm_deinit(struct pwm_descriptor *const descr)
{
ASSERT(descr && descr->func);
descr->func->deinit(&descr->device);
return ERR_NONE;
}
/**
* \brief Start pwm
*/
int32_t pwm_enable(struct pwm_descriptor *const descr)
{
ASSERT(descr && descr->func);
if (descr->func->is_pwm_enabled(&descr->device)) {
return ERR_DENIED;
}
descr->func->start_pwm(&descr->device);
return ERR_NONE;
}
/**
* \brief Stop pwm
*/
int32_t pwm_disable(struct pwm_descriptor *const descr)
{
ASSERT(descr && descr->func);
if (!descr->func->is_pwm_enabled(&descr->device)) {
return ERR_DENIED;
}
descr->func->stop_pwm(&descr->device);
return ERR_NONE;
}
/**
* \brief Register PWM callback
*/
int32_t pwm_register_callback(struct pwm_descriptor *const descr, enum pwm_callback_type type, pwm_cb_t cb)
{
switch (type) {
case PWM_PERIOD_CB:
descr->pwm_cb.period = cb;
break;
case PWM_ERROR_CB:
descr->pwm_cb.error = cb;
break;
default:
return ERR_INVALID_ARG;
}
ASSERT(descr && descr->func);
descr->func->set_irq_state(&descr->device, (enum _pwm_callback_type)type, NULL != cb);
return ERR_NONE;
}
/**
* \brief Change PWM parameter
*/
int32_t pwm_set_parameters(struct pwm_descriptor *const descr, const pwm_period_t period, const pwm_period_t duty_cycle)
{
ASSERT(descr && descr->func);
descr->func->set_pwm_param(&descr->device, period, duty_cycle);
return ERR_NONE;
}
/**
* \brief Retrieve the current driver version
*/
uint32_t pwm_get_version(void)
{
return DRIVER_VERSION;
}
/**
* \internal Process interrupts caused by period experied
*/
static void pwm_period_expired(struct _pwm_device *device)
{
struct pwm_descriptor *const descr = CONTAINER_OF(device, struct pwm_descriptor, device);
if (descr->pwm_cb.period) {
descr->pwm_cb.period(descr);
}
}
/**
* \internal Process interrupts caused by pwm fault
*/
static void pwm_detect_fault(struct _pwm_device *device)
{
struct pwm_descriptor *const descr = CONTAINER_OF(device, struct pwm_descriptor, device);
if (descr->pwm_cb.error) {
descr->pwm_cb.error(descr);
}
}
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