text: /*
   * Copyright (c) 2017, James Jackson
   *
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   * * Redistributions of source code must retain the above copyright notice, this
   *   list of conditions and the following disclaimer.
   *
   * * Redistributions in binary form must reproduce the above copyright notice,
   *   this list of conditions and the following disclaimer in the documentation
   *   and/or other materials provided with the distribution.
   *
   * * Neither the name of the copyright holder nor the names of its
   *   contributors may be used to endorse or promote products derived from
   *   this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef DRV_PWM_OUT_H
  #define DRV_PWM_OUT_H
  
  #include "revo_f4.h"
  
  class PWM_OUT {
  public:
    PWM_OUT();
  
    void init(const pwm_hardware_struct_t* pwm_init, uint16_t frequency, uint32_t max_us, uint32_t min_us, uint32_t start_us);
    void enable();
    void disable();
    void write(float value);
    void writeUs(uint16_t value);
  
  private:
    volatile uint32_t* CCR_;
  
    uint16_t max_cyc_;
    uint16_t min_cyc_;
    uint32_t cycles_per_us_;
  
    GPIO_TypeDef* port_;
    uint16_t pin_;
  };
  
  #endif //DRV_PWM_H
  