GPIOExt.h

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#pragma once
#include <stdint.h>
 
#include "Platforms/GPIO.h"
#include "Platforms/TCA9555.h"
 
namespace audio_driver {
 
class GPIOExt : public API_GPIO {
 public:
  GPIOExt() = default;
  bool begin(IDriverDeviceInfo& pins) override {
    bool rc = gpio.begin(pins);
    if (p_ext) p_ext->begin(pins);
    return rc;
  }
  void end() override {
    gpio.end();
    if (p_ext) p_ext->end();
  }
  void pinMode(GpioPin pin, int mode) override {
    if (p_ext && pin >= offset) {
      p_ext->pinMode(pin, mode);
    } else {
      gpio.pinMode(pin, mode);
    }
  }
  bool digitalWrite(GpioPin pin, bool value) override {
    if (p_ext && pin >= offset) {
      return p_ext->digitalWrite(pin, value);
    } else {
      return gpio.digitalWrite(pin, value);
    }
  }
 
  bool digitalRead(GpioPin pin) override {
    if (p_ext && pin >= offset) {
      return p_ext->digitalRead(pin);
    } else {
      return gpio.digitalRead(pin);
    }
  }
 
  int analogRead(ADCPin pin) override {
    return gpio.analogRead(pin);
  }
 
  void setAltGPIO(API_GPIO& gpioExt, int offset = 1000) {
    AD_LOGD("setAltGPIO");
    p_ext = &gpioExt;
    this->offset = offset;
  }
 
 protected:
  int offset = 1000;
  GPIO gpio; // default GPIO
  API_GPIO* p_ext = nullptr; // alternative GPIO
};
 
}  // namespace audio_driver