This is a library for our Adafruit 16-channel PWM or any other board that uses the PCA9685 I2C PWM driver chip.

Dependents:   K9_Head_Controller

Adafruit_PWMServoDriver.h

Committer:
SomeRandomBloke
Date:
2021-06-26
Revision:
6:a76057c4c7ac
Parent:
0:ed0c8a6481fd

File content as of revision 6:a76057c4c7ac:

/*************************************************** 
  This is a library for our Adafruit 16-channel PWM & Servo driver

  Pick one up today in the adafruit shop!
  ------> http://www.adafruit.com/products/815

  These displays use I2C to communicate, 2 pins are required to  
  interface. For Arduino UNOs, thats SCL -> Analog 5, SDA -> Analog 4

  Adafruit invests time and resources providing this open source code, 
  please support Adafruit and open-source hardware by purchasing 
  products from Adafruit!

  Written by Limor Fried/Ladyada for Adafruit Industries.  
  BSD license, all text above must be included in any redistribution
  
  Ported to mbed by Brian Dickman, mbed.org user bxd.
  
  Note: you are responsible for creating the I2C object, and setting
  frequency if desired.
 ****************************************************/

#ifndef _ADAFRUIT_PWMServoDriver_H
#define _ADAFRUIT_PWMServoDriver_H

#include "mbed.h"


#define PCA9685_SUBADR1 0x2
#define PCA9685_SUBADR2 0x3
#define PCA9685_SUBADR3 0x4

#define PCA9685_MODE1 0x0
#define PCA9685_PRESCALE 0xFE

#define LED0_ON_L 0x6
#define LED0_ON_H 0x7
#define LED0_OFF_L 0x8
#define LED0_OFF_H 0x9

#define ALLLED_ON_L 0xFA
#define ALLLED_ON_H 0xFB
#define ALLLED_OFF_L 0xFC
#define ALLLED_OFF_H 0xFD


class Adafruit_PWMServoDriver {
 public:
  Adafruit_PWMServoDriver(I2C *i2c, uint8_t addr = 0x40);
  void begin(void);
  void reset(void);
  void setPWMFreq(float freq);
  void setPWM(uint8_t num, uint16_t on, uint16_t off);

 private:
  I2C *_i2c;
  uint8_t _i2caddr;

  uint8_t read8(uint8_t addr);
  void write8(uint8_t addr, uint8_t d);
};

#endif