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