Add digital write all and fix all examples with test of pcf8574 start

PCF8574.cpp

@@ -697,14 +697,14 @@ bool PCF8574::digitalWrite(uint8_t pin, uint8_t value){
 	}
 	bool PCF8574::digitalWriteAll(PCF8574::DigitalInput digitalInput){
 
-		setVal(0, digitalInput.p0);
+		setVal(P0, digitalInput.p0);
-		setVal(1, digitalInput.p1);
+		setVal(P1, digitalInput.p1);
-		setVal(2, digitalInput.p2);
+		setVal(P2, digitalInput.p2);
-		setVal(3, digitalInput.p3);
+		setVal(P3, digitalInput.p3);
-		setVal(4, digitalInput.p4);
+		setVal(P4, digitalInput.p4);
-		setVal(5, digitalInput.p5);
+		setVal(P5, digitalInput.p5);
-		setVal(6, digitalInput.p6);
+		setVal(P6, digitalInput.p6);
-		setVal(7, digitalInput.p7);
+		setVal(P7, digitalInput.p7);
 
 		return digitalWriteAllBytes(writeByteBuffered);
 	}

examples/Arduino4Leds4ButtonsWithInterrupt/Arduino4Leds4ButtonsWithInterrupt.ino

@@ -31,7 +31,12 @@ void setup()
 	pcf8574.pinMode(P5, OUTPUT);
 	pcf8574.pinMode(P4, OUTPUT, LOW);
 
-	pcf8574.begin();
+	Serial.print("Init pcf8574...");
+	if (pcf8574.begin()){
+		Serial.println("OK");
+	}else{
+		Serial.println("KO");
+	}
 
 	timeElapsed = millis();
 }

examples/blinkOnPin0/blinkOnPin0.ino

@@ -14,11 +14,18 @@ PCF8574 pcf8574(0x39);
 void setup()
 {
 	Serial.begin(115200);
+	delay(1000);
 
 	// Set pinMode to OUTPUT
 	pcf8574.pinMode(P0, OUTPUT);
 	pcf8574.pinMode(P1, INPUT);
-	pcf8574.begin();
+
+	Serial.print("Init pcf8574...");
+	if (pcf8574.begin()){
+		Serial.println("OK");
+	}else{
+		Serial.println("KO");
+	}
 }
 
 void loop()

examples/encoderWithBasicLibraryFunction/encoderWithBasicLibraryFunction.ino

@@ -49,7 +49,12 @@ void setup()
 	  pcf8574.setLatency(0);
 
 	  // Start library
-	  pcf8574.begin();
+		Serial.print("Init pcf8574...");
+		if (pcf8574.begin()){
+			Serial.println("OK");
+		}else{
+			Serial.println("KO");
+		}
 }
 
 bool changed = false;

examples/encoderWithFullLibraryFunction/encoderWithFullLibraryFunction.ino

@@ -44,7 +44,12 @@ void setup()
 	pcf8574.pinMode(P2, INPUT);
 
 	// Start library
-	pcf8574.begin();
+	Serial.print("Init pcf8574...");
+	if (pcf8574.begin()){
+		Serial.println("OK");
+	}else{
+		Serial.println("KO");
+	}
 
 }
 

examples/interruptWemos/interruptWemos.ino

@@ -42,13 +42,20 @@ void keyPressedOnPCF8574(){
 void setup()
 {
   Serial.begin(9600);
+  delay(1000);
+
   pinMode(ESP8266_INTERRUPTED_PIN, INPUT_PULLUP);
   attachInterrupt(digitalPinToInterrupt(ESP8266_INTERRUPTED_PIN), keyPressedOnPCF8574, FALLING);
 
   for(int i=0;i<8;i++) {
     pcf8574.pinMode(i, INPUT);
   }
-  pcf8574.begin();
+	Serial.print("Init pcf8574...");
+	if (pcf8574.begin()){
+		Serial.println("OK");
+	}else{
+		Serial.println("KO");
+	}
 }
 
 void loop()

examples/keyPressedPin1/keyPressedPin1.ino

@@ -14,11 +14,17 @@ unsigned long timeElapsed;
 void setup()
 {
 	Serial.begin(115200);
+	delay(1000);
 
 	pcf8574.pinMode(P0, OUTPUT);
 	pcf8574.pinMode(P1, INPUT);
 
-	pcf8574.begin();
+	Serial.print("Init pcf8574...");
+	if (pcf8574.begin()){
+		Serial.println("OK");
+	}else{
+		Serial.println("KO");
+	}
 }
 
 void loop()

examples/keyPressedPin1_storedOnBuffer_async/keyPressedPin1_storedOnBuffer_async.ino

@@ -14,11 +14,17 @@ unsigned long timeElapsed;
 void setup()
 {
 	Serial.begin(115200);
+	delay(1000);
 
 	pcf8574.pinMode(P0, OUTPUT);
 	pcf8574.pinMode(P1, INPUT);
-	pcf8574.begin();
 
+	Serial.print("Init pcf8574...");
+	if (pcf8574.begin()){
+		Serial.println("OK");
+	}else{
+		Serial.println("KO");
+	}
 
 	timeElapsed = millis();
 }

examples/keyPressed_withInterrupt/keyPressed_withInterrupt.ino

@@ -20,10 +20,16 @@ unsigned long timeElapsed;
 void setup()
 {
 	Serial.begin(115200);
+	delay(1000);
 
 	pcf8574.pinMode(P0, OUTPUT);
 	pcf8574.pinMode(P1, INPUT);
-	pcf8574.begin();
+	Serial.print("Init pcf8574...");
+	if (pcf8574.begin()){
+		Serial.println("OK");
+	}else{
+		Serial.println("KO");
+	}
 
 
 	timeElapsed = millis();

examples/ledEsp32OnTheSecondI2C/ledEsp32OnTheSecondI2C.ino

@@ -46,12 +46,19 @@ void setup()
   Serial.begin(112560);
 
   I2Cone.begin(16,17,400000); // SDA pin 16, SCL pin 17, 400kHz frequency
+  delay(1000);
 
   // Set pinMode to OUTPUT
   for(int i=0;i<8;i++) {
     pcf8574.pinMode(i, OUTPUT);
   }
-  pcf8574.begin();
+
+	Serial.print("Init pcf8574...");
+	if (pcf8574.begin()){
+		Serial.println("OK");
+	}else{
+		Serial.println("KO");
+	}
 }
 
 void loop()

examples/ledWemos/ledWemos.ino

@@ -31,12 +31,18 @@ PCF8574 pcf8574(0x20);
 void setup()
 {
   Serial.begin(9600);
+  delay(1000);
 
   // Set pinMode to OUTPUT
   for(int i=0;i<8;i++) {
     pcf8574.pinMode(i, OUTPUT);
   }
-  pcf8574.begin();
+	Serial.print("Init pcf8574...");
+	if (pcf8574.begin()){
+		Serial.println("OK");
+	}else{
+		Serial.println("KO");
+	}
 }
 
 void loop()

examples/readAll_Interrupt/readAll_Interrupt.ino

@@ -20,11 +20,18 @@ unsigned long timeElapsed;
 void setup()
 {
 	Serial.begin(115200);
+	delay(1000);
 
 	pcf8574.pinMode(P0, OUTPUT);
 	pcf8574.pinMode(P1, INPUT);
 	pcf8574.pinMode(P2, INPUT);
-	pcf8574.begin();
+	Serial.print("Init pcf8574...");
+	if (pcf8574.begin()){
+		Serial.println("OK");
+	}else{
+		Serial.println("KO");
+	}
+
 
 	Serial.println("START");
 

examples/readAll_Interrupt_lowMemory/readAll_Interrupt_lowMemory.ino

@@ -24,11 +24,17 @@ unsigned long timeElapsed;
 void setup()
 {
 	Serial.begin(115200);
+	delay(1000);
 
 	pcf8574.pinMode(P0, INPUT);
 	pcf8574.pinMode(P1, INPUT);
 	pcf8574.pinMode(P2, INPUT);
-	pcf8574.begin();
+	Serial.print("Init pcf8574...");
+	if (pcf8574.begin()){
+		Serial.println("OK");
+	}else{
+		Serial.println("KO");
+	}
 
 	Serial.println("START");
 

examples/writeAllEsp8266/writeAllEsp8266.ino

@@ -0,0 +1,101 @@
+/*
+ KeyPressed with interrupt and digital write all
+ from P4 to P7
+ by Mischianti Renzo <http://www.mischianti.org>
+
+ https://www.mischianti.org/2019/01/02/pcf8574-i2c-digital-i-o-expander-fast-easy-usage/
+*/
+
+#include "Arduino.h"
+#include "PCF8574.h"
+
+// For arduino uno only pin 1 and 2 are interrupted
+#define ARDUINO_UNO_INTERRUPTED_PIN D3
+
+// Function interrupt
+void ICACHE_RAM_ATTR  keyPressedOnPCF8574();
+
+// Set i2c address
+PCF8574 pcf8574(0x38, ARDUINO_UNO_INTERRUPTED_PIN, keyPressedOnPCF8574);
+unsigned long timeElapsed;
+void setup()
+{
+	Serial.begin(115200);
+	delay(1000);
+	Serial.println("INIT");
+
+	pcf8574.pinMode(P0, INPUT);
+	pcf8574.pinMode(P1, INPUT_PULLUP);
+	pcf8574.pinMode(P2, INPUT);
+	pcf8574.pinMode(P3, INPUT);
+
+	pcf8574.pinMode(P7, OUTPUT);
+	pcf8574.pinMode(P6, OUTPUT, HIGH);
+	pcf8574.pinMode(P5, OUTPUT, LOW);
+	pcf8574.pinMode(P4, OUTPUT, LOW);
+
+	Serial.print("Init pcf8574...");
+	if (pcf8574.begin()){
+		Serial.println("OK");
+	}else{
+		Serial.println("KO");
+	}
+
+	Serial.println("START");
+	timeElapsed = millis();
+}
+unsigned long lastSendTime = 0;        // last send time
+unsigned long interval = 3000;          // interval between sends
+
+bool startVal = HIGH;
+
+bool keyPressed = false;
+void loop()
+{
+	if (keyPressed){
+		uint8_t val0 = pcf8574.digitalRead(P0);
+		uint8_t val1 = pcf8574.digitalRead(P1);
+		uint8_t val2 = pcf8574.digitalRead(P2);
+		uint8_t val3 = pcf8574.digitalRead(P3);
+		Serial.print("P0 ");
+		Serial.print(val0);
+		Serial.print(" P1 ");
+		Serial.println(val1);
+		Serial.print("P2 ");
+		Serial.print(val2);
+		Serial.print(" P3 ");
+		Serial.println(val3);
+		keyPressed= false;
+
+
+	}
+
+	  if (millis() - lastSendTime > interval) {
+			Serial.print("WRITE VALUE FROM P4 TO P7 ");
+			Serial.println(startVal);
+
+//			pcf8574.digitalWrite(P7, startVal);
+			bool startVal2 = LOW;
+			if (startVal==HIGH) {
+				startVal = LOW;
+				startVal2 = HIGH;
+			}else{
+				startVal = HIGH;
+				startVal2 = LOW;
+			}
+			PCF8574::DigitalInput digitalInput;
+			digitalInput.p4 = startVal2;
+			digitalInput.p5 = startVal;
+			digitalInput.p6 = startVal2;
+			digitalInput.p7 = startVal;
+
+			pcf8574.digitalWriteAll(digitalInput);
+			lastSendTime = millis();
+	  }
+}
+
+void keyPressedOnPCF8574(){
+	// Interrupt called (No Serial no read no wire in this function, and DEBUG disabled on PCF library)
+	 keyPressed = true;
+
+}