Calum Johnston / PCA9685

Library for interfacing with the NXP PCA9685 PWM controller over an I2C connection. Designed with the Adafruit breakout board (of the same name) in mind.

Dependents:   Hexapod_Library main_robot_gant_v22

Documentation is lacking - not currently ready for public use, sorry.

PCA9685.h

Committer:
el13cj
Date:
2016-05-10
Revision:
4:3bcda7deb098
Parent:
3:a3410f2f061d

File content as of revision 4:3bcda7deb098:

#ifndef PCA9685_LIBRARY_H
#define PCA9685_LIBRARY_H

#include "mbed.h"
#include "definitions.h"


class PCA9685 {
    
    public:
        PCA9685(uint8_t i2c_addr, I2C i2c_object, float frequency);
        void init(void);
        void set_pwm_output(int pwm_output, uint16_t count_on, uint16_t count_off);
        void set_pwm_output_on_0(int pwm_output, uint16_t count_off);
        void set_pwm_duty(int pwm_output, float duty_cycle);
        void set_pwm_pw(int pwm_output, float pulse_width_us);
        void update(void);
        
    private: 
        void reset(void);
        void write_8(uint8_t reg, uint8_t msg);
        uint8_t read_8(uint8_t reg);
        void set_prescale(uint8_t prescale);
        int convert_pwm_value(float pulse_width_us, float period_us);
    
    private:
        int i2c_addr;
        float freq;
        I2C i2c;
};        

#endif