HardwarePWM.h

/*
 * File: HardwarePWM.h
 * Original Author: https://github.com/hrsavla
 *
 * This HW_PWM library enables Sming framework user to use ESP SDK PWM API
 * Period of PWM is fixed to 1000ms / Frequency = 1khz
 * Duty at 100% = 22222. Duty at 0% = 0
 * You can use function setPeriod() to change frequency/period.
 * Calculate the Duty as per the formulae give in ESP8266 SDK
 * Duty = (Period *1000)/45
 *
 * PWM can be generated on upto 8 pins (ie All pins except pin 16)
 * Created on August 17, 2015, 2:27 PM
 */
#ifndef HARDWAREPWM_H
#define HARDWAREPWM_H

#include "ESP8266EX.h"
#include "../Wiring/WiringFrameworkDependencies.h"

#ifdef __cplusplus
extern "C" {
#endif
#include <pwm.h>
#ifdef __cplusplus
}
#endif

#define PWM_BAD_CHANNEL 0xff 

class HardwarePWM {
public:
    HardwarePWM(uint8 *pins, uint8 no_of_pins);
    virtual ~HardwarePWM();

    bool analogWrite(uint8 pin, uint32 duty);

    bool setDuty(uint8 pin, uint32 duty);

    uint32 getDuty(uint8 pin);

    void setPeriod(uint32 period);

    uint32 getPeriod(void);

    uint8 getChannel(uint8 pin);

    uint32 getMaxDuty();
protected:

private:
    uint8 channel_count;
    uint8 channels[PWM_CHANNEL_NUM_MAX];
    uint32 maxduty;
};

#endif  /* HARDWAREPWM_H */