Hi,
I want to sense water levels using eight PCF8574 GPIO extenders. Here I want to control the IO extender reading using dip switches. One extender measures one water level. So, I used 8 dip switches (Interactive DIP Switch 8 common elements) connected with 8 extenders.
As an example, after I HIGH one switch of the first dip switch, the first I/O extender's P0 should be able to read the pin satate and give a serial print "increasing water level 1". Likewise for all the first switch of the 8 dip switches go HIGH P0 pin should read the satae and give a serial print " Increasing water level 2, increasing water level 3"..etc. Like that when all the P6 goes to LOW it should give " decreasing water level" on serial monitor. Other remaining P1 to P7 I/O pins using to on and off leds.
In my code I got all the serial prints and led outputs without the control of dip switches. I want to get those conditions under the manipulation of dip switches. In other words,they should work only if I on or off the dip switches. Due to exceeding word limit I couldnt be able to attach the decreasing functions.
#include <Wire.h>
#include "Arduino.h"
#include "PCF8574.h"
//Set the I2C HEX address
int addr1 = 0x20; //PCF8574 device 1
int addr2 = 0x21; //PCF8574 device 2
int addr3 = 0x22; //PCF8574 device 3
int addr4 = 0x23; //PCF8574 device 4
int addr5 = 0x24; //PCF8574 device 5
int addr6 = 0x25; //PCF8574 device 6
int addr7 = 0x26; //PCF8574 device 7
int addr8 = 0x27; //PCF8574 device 8
bool ISR_FLAG1 = false;//interrupt triggered flag
bool ISR_FLAG2 = false;//interrupt triggered flag
bool ISR_FLAG3 = false;//interrupt triggered flag
bool ISR_FLAG4 = false;//interrupt triggered flag
bool ISR_FLAG5 = false;//interrupt triggered flag
bool ISR_FLAG6 = false;//interrupt triggered flag
bool ISR_FLAG7 = false;//interrupt triggered flag
bool ISR_FLAG8 = false;//interrupt triggered flag
int OutPins[] = {13, 12, 11, 10, 9, 8, 7, 6}; //led pins
int s;//Array element's parameter of OutPins[] array
byte abc = 0;
void setup() {
Serial.begin(9600);
Wire.begin();
//pcf8574.begin();
//Assign the interrupt routine using Mega pins
//Interrupt is triggered when a GPIO input changes from LOW to HIGH
pinMode(22, INPUT_PULLUP);
attachInterrupt(digitalPinToInterrupt(22), ISR_PROC, FALLING);
pinMode(47, INPUT_PULLUP);
attachInterrupt(digitalPinToInterrupt(47), ISR_PROC, FALLING);
pinMode(48, INPUT_PULLUP);
attachInterrupt(digitalPinToInterrupt(48), ISR_PROC, FALLING);
pinMode(49, INPUT_PULLUP);
attachInterrupt(digitalPinToInterrupt(49), ISR_PROC, FALLING);
pinMode(50, INPUT_PULLUP);
attachInterrupt(digitalPinToInterrupt(50), ISR_PROC, FALLING);
pinMode(51, INPUT_PULLUP);
attachInterrupt(digitalPinToInterrupt(51), ISR_PROC, FALLING);
pinMode(52, INPUT_PULLUP);
attachInterrupt(digitalPinToInterrupt(52), ISR_PROC, FALLING);
pinMode(53, INPUT_PULLUP);
attachInterrupt(digitalPinToInterrupt(53), ISR_PROC, FALLING);
setupOutPins();//set the pinMode() function to LEDs
digitalWrite ( OutPins[0], 1);
}
void setupOutPins() {
for (s = 0; s < 8; s++) {
pinMode (OutPins[s], OUTPUT);
delayMicroseconds (100);
}
}
void loop() {
InsetIncRead1 (); //Gives the output when the water level increasing in dip switch one
InsetIncRead2 (); //Gives the output when the water level increasing in dip switch two
InsetIncRead3 (); //Gives the output when the water level increasing in dip switch three
InsetIncRead4 (); //Gives the output when the water level increasing in dip switch four
InsetIncRead5 (); //Gives the output when the water level increasing in dip switch five
InsetIncRead6 (); //Gives the output when the water level increasing in dip switch six
InsetIncRead7 (); //Gives the output when the water level increasing in dip switch seven
InsetIncRead8 (); //Gives the output when the water level increasing in dip switch eight
//ISR_PROC();//Set a flag if an interrupt is triggered
InsetDecRead8 (); //Gives the output when the water level decreasing in dip switch eight
InsetDecRead7 (); //Gives the output when the water level decreasing in dip switch seven
InsetDecRead6 (); //Gives the output when the water level decreasing in dip switch six
InsetDecRead5 (); //Gives the output when the water level decreasing in dip switch five
InsetDecRead4 (); //Gives the output when the water level decreasing in dip switch four
InsetDecRead3 (); //Gives the output when the water level decreasing in dip switch three
InsetDecRead2 (); //Gives the output when the water level decreasing in dip switch two
InsetDecRead1 (); //Gives the output when the water level decreasing in dip switch one
}
void InsetIncRead1 () {
Wire.requestFrom (addr1, 1);
if (Wire.available()) {
abc = Wire.read();
}
if (abc & 0b00000001) {
Serial.println("Increasing water level 1");
}
if (abc & 0b01111111) {
digitalWrite(OutPins[1], 1);
}
delay(500);
}
void InsetIncRead2 () {
Wire.requestFrom (addr2, 1);
if (Wire.available()) {
abc = Wire.read();
}
if (abc & 0b00000001) {
Serial.println("Increasing water level 2");
}
if (abc & 0b00000011) {
digitalWrite (OutPins[0], 0);
}
if (abc & 0b01111111) {
digitalWrite(OutPins[2], 1);
}
delay(500);
}
int InsetIncRead3 () {
Wire.requestFrom (addr3, 1);
if (Wire.available()) {
abc = Wire.read();
}
if (abc & 0b00000001) {
Serial.println("Increasing water level 3");
}
if (abc & 0b00000011) {
digitalWrite (OutPins[1], 0);
}
if (abc & 0b01111111) {
digitalWrite(OutPins[3], 1);
}
delay(500);
}
int InsetIncRead4 () {
Wire.requestFrom (addr4, 1);
if (Wire.available()) {
abc = Wire.read();
}
if (abc & 0b00000001) {
Serial.println("Increasing water level 4");
}
if (abc & 0b00000011) {
digitalWrite (OutPins[2], 0);
}
if (abc & 0b01111111) {
digitalWrite(OutPins[4], 1);
}
delay(500);
}
void InsetIncRead5 () {
Wire.requestFrom (addr5, 1);
if (Wire.available()) {
abc = Wire.read();
}
if (abc & 0b00000001) {
Serial.println("Increasing water level 5");
}
if (abc & 0b00000011) {
digitalWrite (OutPins[3], 0);
}
if (abc & 0b01111111) {
digitalWrite(OutPins[5], 1);
}
delay(500);
}
void InsetIncRead6 () {
Wire.requestFrom (addr6, 1);
if (Wire.available()) {
abc = Wire.read();
}
if (abc & 0b00000001) {
Serial.println("Increasing water level 6");
}
if (abc & 0b00000011) {
digitalWrite (OutPins[4], 0);
}
if (abc & 0b01111111) {
digitalWrite(OutPins[6], 1);
}
delay(500);
}
void InsetIncRead7 () {
Wire.requestFrom (addr7, 1);
if (Wire.available()) {
abc = Wire.read();
}
if (abc & 0b00000001) {
Serial.println("Increasing water level 7");
}
if (abc & 0b00000011) {
digitalWrite (OutPins[5], 0);
}
if (abc & 0b01111111) {
digitalWrite(OutPins[7], 1);
}
delay(500);
}
void InsetIncRead8 () {
Wire.requestFrom (addr8, 1);
if (Wire.available()) {
abc = Wire.read();
}
if (abc & 0b00000001) {
Serial.println("Increasing water level 8");
}
if (abc & 0b00000011) {
digitalWrite (OutPins[6], 0);
}
if (abc & 0b01111111) {
digitalWrite(OutPins[8], 1);
}
delay(500);
}
//Set a flag if an interrupt is triggered
void ISR_PROC() {
ISR_FLAG1 = true;
ISR_FLAG2 = true;
ISR_FLAG3 = true;
ISR_FLAG4 = true;
ISR_FLAG5 = true;
ISR_FLAG6 = true;
ISR_FLAG7 = true;
ISR_FLAG8 = true;
if (ISR_FLAG1 == true) {
InsetDecRead1 ();
ISR_FLAG1 = false; //clear interrupt flag
}
delay(200);
if (ISR_FLAG2 == true) {
InsetDecRead2 ();
ISR_FLAG2 = false; //clear interrupt flag
}
delay(200);
if (ISR_FLAG3 == true) {
InsetDecRead3 ();
ISR_FLAG3 = false; //clear interrupt flag
}
delay(200);
if (ISR_FLAG4 == true) {
InsetDecRead4 ();
ISR_FLAG4 = false; //clear interrupt flag
}
delay(200);
if (ISR_FLAG5 == true) {
InsetDecRead5 ();
ISR_FLAG5 = false; //clear interrupt flag
}
delay(200);
if (ISR_FLAG6 == true) {
InsetDecRead6 ();
ISR_FLAG6 = false; //clear interrupt flag
}
delay(200);
if (ISR_FLAG7 == true) {
InsetDecRead7 ();
ISR_FLAG7 = false; //clear interrupt flag
}
delay(200);
if (ISR_FLAG8 == true) {
InsetDecRead8 ();
ISR_FLAG8 = false; //clear interrupt flag
}
delay(200);
}
