EXT_PCA9685.h

/*
 Copyright (C) AC SOFTWARE SP. Z O.O.
 
 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License
 as published by the Free Software Foundation; either version 2
 of the License, or (at your option) any later version.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/
 
#ifndef SRC_SUPLA_CONTROL_EXT_PCA9685_H_
#define SRC_SUPLA_CONTROL_EXT_PCA9685_H_
 
/*
Dependency: https://github.com/RobTillaart/PCA9685_RT
use library manager to install it
*/
 
#include <PCA9685.h>
#include <supla/io.h>
#include <supla/log_wrapper.h>
 
namespace Supla {
namespace Control {
 
class ExtPCA9685 : public Supla::Io {
 public:
  explicit ExtPCA9685(uint8_t address = 0x40)
      : pca(address), Supla::Io(false) {
    if (!pca.begin()) {
      SUPLA_LOG_DEBUG("Unable to find PCA9685");
    } else {
      SUPLA_LOG_DEBUG("PCA9685 is connected at address: 0x%x, "
                        "with PWM freq: %d Hz", address, pca.getFrequency());
      isConnected = true;
    }
  }
 
  void customPinMode(int channelNumber, uint8_t pin, uint8_t mode) override {
  }
  void customDigitalWrite(int channelNumber, uint8_t pin,
                                                      uint8_t val) override {
  }
  int customDigitalRead(int channelNumber, uint8_t pin) override {
    return 0;
  }
  unsigned int customPulseIn(int channelNumber, uint8_t pin, uint8_t value,
                                            uint64_t timeoutMicro) override {
    return 0;
  }
  void customAnalogWrite(int channelNumber, uint8_t pin, int val) override {
    if (isConnected) {
      val = map(val, 0, 1023, 0, 4095);
      pca.setPWM(pin, val);
    }
  }
 
  int customAnalogRead(int channelNumber, uint8_t pin) override {
    return 0;
  }
 
  // Default frequency: 200 Hz
  void setPWMFrequency(uint16_t frequency_) {
    if (isConnected) {
      pca.setFrequency(frequency_);
      SUPLA_LOG_DEBUG("PCA9685 - setting PWM frequency to: %d Hz",
                                                   pca.getFrequency());
    }
  }
 
 protected:
  ::PCA9685 pca;
  bool isConnected = false;
};
 
};  // namespace Control
};  // namespace Supla
 
#endif  // SRC_SUPLA_CONTROL_EXT_PCA9685_H_