source: azure_iot_hub/trunk/asp3_dcre/mbed/hal/pwmout_api.h@ 388

/** \addtogroup hal */
/** @{*/
/* mbed Microcontroller Library
 * Copyright (c) 2006-2013 ARM Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#ifndef MBED_PWMOUT_API_H
#define MBED_PWMOUT_API_H

#include "device.h"

#if DEVICE_PWMOUT

#ifdef __cplusplus
extern "C" {
#endif

/** Pwmout hal structure. pwmout_s is declared in the target's hal
 */
typedef struct pwmout_s pwmout_t;

/**
 * \defgroup hal_pwmout Pwmout hal functions
 * @{
 */

/** Initialize the pwm out peripheral and configure the pin
 *
 * @param obj The pwmout object to initialize
 * @param pin The pwmout pin to initialize
 */
void pwmout_init(pwmout_t *obj, PinName pin);

/** Deinitialize the pwmout object
 *
 * @param obj The pwmout object
 */
void pwmout_free(pwmout_t *obj);

/** Set the output duty-cycle in range <0.0f, 1.0f>
 *
 * Value 0.0f represents 0 percentage, 1.0f represents 100 percent.
 * @param obj     The pwmout object
 * @param percent The floating-point percentage number
 */
void pwmout_write(pwmout_t *obj, float percent);

/** Read the current float-point output duty-cycle
 *
 * @param obj The pwmout object
 * @return A floating-point output duty-cycle
 */
float pwmout_read(pwmout_t *obj);

/** Set the PWM period specified in seconds, keeping the duty cycle the same
 *
 * Periods smaller than microseconds (the lowest resolution) are set to zero.
 * @param obj     The pwmout object
 * @param seconds The floating-point seconds period
 */
void pwmout_period(pwmout_t *obj, float seconds);

/** Set the PWM period specified in miliseconds, keeping the duty cycle the same
 *
 * @param obj The pwmout object
 * @param ms  The milisecond period
 */
void pwmout_period_ms(pwmout_t *obj, int ms);

/** Set the PWM period specified in microseconds, keeping the duty cycle the same
 *
 * @param obj The pwmout object
 * @param us  The microsecond period
 */
void pwmout_period_us(pwmout_t *obj, int us);

/** Set the PWM pulsewidth specified in seconds, keeping the period the same.
 *
 * @param obj     The pwmout object
 * @param seconds The floating-point pulsewidth in seconds
 */
void pwmout_pulsewidth(pwmout_t *obj, float seconds);

/** Set the PWM pulsewidth specified in miliseconds, keeping the period the same.
 *
 * @param obj The pwmout object
 * @param ms  The floating-point pulsewidth in miliseconds
 */
void pwmout_pulsewidth_ms(pwmout_t *obj, int ms);

/** Set the PWM pulsewidth specified in microseconds, keeping the period the same.
 *
 * @param obj The pwmout object
 * @param us  The floating-point pulsewidth in microseconds
 */
void pwmout_pulsewidth_us(pwmout_t *obj, int us);

/**@}*/

#ifdef __cplusplus
}
#endif

#endif

#endif

/** @}*/