PCF8574 output pin initialization parameter

myHal.cpp_example.txt

@@ -146,6 +146,13 @@ void halSetup() {
 
   //PCF8574::create(200, 8, 0x23, 40);
 
+  // Alternative form to initialize 8 pins as output
+  //  INT pin -1, when INT pin is not used
+
+  //PCF8574::create(200, 8, 0x23, -1, 255); // 8 pins High
+  //PCF8574::create(200, 8, 0x23, -1, 0);   // 8 pins Low
+  //PCF8574::create(200, 8, 0x23, -1, 0b11000010);  
+  //                       pins listed sequentially from 7 to 0
 
   //=======================================================================
   // The following directive defines a PCF8575 16-port I2C GPIO Extender module.