GY-63_MS5611/libraries/PCF8574/examples/PCF8574_test/PCF8574_test.ino

//
//    FILE: PCF8574_test.ino
//  AUTHOR: Rob Tillaart
//    DATE: 7-febr-2013
//
// PUPROSE: test PCF8574 library
//

#include "PCF8574.h"
#include <Wire.h>

PCF8574 PCF_01(0x38);

void setup()
{
  Serial.begin(9600);
  Serial.print("PCF8574_test version: ");
  Serial.println(PCF8574_LIB_VERSION);
  
  PCF_01.begin();

  int x = PCF_01.read8();
  Serial.print("Read ");
  Serial.println(x, HEX);
  delay(1000);
}

void loop()
{
  Serial.println("HLT");
  while (Serial.available() == 0);
  switch(Serial.read())
  {
    case 'H': doHigh(); break;
    case 'L': doLow(); break;
    case 'T': doToggle(); break;
  }
}

void doHigh()
{
  PCF_01.write(4, HIGH);
  int x = PCF_01.read8();
  Serial.print("Read ");
  Serial.println(x, HEX);
}

void doLow()
{
  PCF_01.write(4, LOW);
  int x = PCF_01.read8();
  Serial.print("Read ");
  Serial.println(x, HEX);
}

void doToggle()
{
  PCF_01.toggle(4);
  int x = PCF_01.read8();
  Serial.print("Read ");
  Serial.println(x, HEX);
}