Test Script added.

Author: mathertel

examples/LiquidCrystal_PCF8574_Test/LiquidCrystal_PCF8574_Test.ino

@@ -0,0 +1,94 @@
+#include <Wire.h>
+#include <LiquidCrystal_PCF8574.h>
+
+LiquidCrystal_PCF8574 lcd(0x27);  // set the LCD address to 0x27 for a 16 chars and 2 line display
+
+int show;
+
+void setup()
+{
+  int error;
+
+  Serial.begin(115200);
+  Serial.println("LCD...");
+
+  while (! Serial);
+
+  Serial.println("Dose: check for LCD");
+
+  // See http://playground.arduino.cc/Main/I2cScanner
+  Wire.begin();
+  Wire.beginTransmission(0x27);
+  error = Wire.endTransmission();
+  Serial.print("Error: ");
+  Serial.print(error);
+
+  if (error == 0) {
+    Serial.println(": LCD found.");
+
+  } else {
+    Serial.println(": LCD not found.");
+  } // if
+
+  lcd.begin(16, 2); // initialize the lcd
+  show = 0;
+} // setup()
+
+void loop()
+{
+  if (show == 0) {
+    lcd.setBacklight(255);
+    lcd.home(); lcd.clear();
+    lcd.print("Hello LCD");
+    delay(1000);
+
+    lcd.setBacklight(0);
+    delay(400);
+    lcd.setBacklight(255);
+
+  } else if (show == 1) {
+    lcd.clear();
+    lcd.print("Cursor On");
+    lcd.cursor();
+
+  } else if (show == 2) {
+    lcd.clear();
+    lcd.print("Cursor Blink");
+    lcd.blink();
+
+  } else if (show == 3) {
+    lcd.clear();
+    lcd.print("Cursor OFF");
+    lcd.noBlink();
+    lcd.noCursor();
+
+  } else if (show == 4) {
+    lcd.clear();
+    lcd.print("Display Off");
+    lcd.noDisplay();
+
+  } else if (show == 5) {
+    lcd.clear();
+    lcd.print("Display On");
+    lcd.display();
+
+  } else if (show == 7) {
+    lcd.clear();
+    lcd.setCursor(0, 0);
+    lcd.print("*** first line.");
+    lcd.setCursor(0, 1);
+    lcd.print("*** second line.");
+
+  } else if (show == 8) {
+    lcd.scrollDisplayLeft();
+  } else if (show == 9) {
+    lcd.scrollDisplayLeft();
+  } else if (show == 10) {
+    lcd.scrollDisplayLeft();
+  } else if (show == 11) {
+    lcd.scrollDisplayRight();
+  } // if
+
+  delay(2000);
+  show = (show + 1) % 12;
+} // loop()