[Arduino IDE demo source code for KC868-A8S]--#06-KC868-A8S_PCF8574-Digital input_code
Code:
/*KC868-A8S PCF8574 Digital input code*/
/*digital input will trigger digital output */
#include "Arduino.h"
#include "PCF8574.h"
// Set i2c address
PCF8574 pcf8574_IN1(0x22,4,5);
PCF8574 pcf8574_RE(0x24,4,5);
void setup()
{
Serial.begin(115200);
delay(1000);
pcf8574_RE.pinMode(P0, OUTPUT);
pcf8574_RE.pinMode(P1, OUTPUT);
pcf8574_RE.pinMode(P2, OUTPUT);
pcf8574_RE.pinMode(P3, OUTPUT);
pcf8574_RE.pinMode(P4, OUTPUT);
pcf8574_RE.pinMode(P5, OUTPUT);
pcf8574_RE.pinMode(P6, OUTPUT);
pcf8574_RE.pinMode(P7, OUTPUT);
pcf8574_RE.begin();
pcf8574_IN1.pinMode(P0, INPUT);
pcf8574_IN1.pinMode(P1, INPUT);
pcf8574_IN1.pinMode(P2, INPUT);
pcf8574_IN1.pinMode(P3, INPUT);
pcf8574_IN1.pinMode(P4, INPUT);
pcf8574_IN1.pinMode(P5, INPUT);
pcf8574_IN1.pinMode(P6, INPUT);
pcf8574_IN1.pinMode(P7, INPUT);
pcf8574_IN1.begin();
}
void loop()
{
uint8_t val1 = pcf8574_IN1.digitalRead(P0);
uint8_t val2 = pcf8574_IN1.digitalRead(P1);
uint8_t val3 = pcf8574_IN1.digitalRead(P2);
uint8_t val4 = pcf8574_IN1.digitalRead(P3);
uint8_t val5 = pcf8574_IN1.digitalRead(P4);
uint8_t val6 = pcf8574_IN1.digitalRead(P5);
uint8_t val7 = pcf8574_IN1.digitalRead(P6);
uint8_t val8 = pcf8574_IN1.digitalRead(P7);
if (val1==LOW) {
pcf8574_RE.digitalWrite(P0,LOW);
delay(100);
}
else pcf8574_RE.digitalWrite(P0,HIGH);
if (val2==LOW) {
pcf8574_RE.digitalWrite(P1,LOW);
delay(100);
}
else pcf8574_RE.digitalWrite(P1,HIGH);
if (val3==LOW) {
pcf8574_RE.digitalWrite(P2,LOW);
delay(100);
}
else pcf8574_RE.digitalWrite(P2,HIGH);
if (val4==LOW) {
pcf8574_RE.digitalWrite(P3,LOW);
delay(100);
}
else pcf8574_RE.digitalWrite(P3,HIGH);
if (val5==LOW) {
pcf8574_RE.digitalWrite(P4,LOW);
delay(100);
}
else pcf8574_RE.digitalWrite(P4,HIGH);
if (val6==LOW) {
pcf8574_RE.digitalWrite(P5,LOW);
delay(100);
}
else pcf8574_RE.digitalWrite(P5,HIGH);
if (val7==LOW) {
pcf8574_RE.digitalWrite(P6,LOW);
delay(100);
}
else pcf8574_RE.digitalWrite(P6,HIGH);
if (val8==LOW) {
pcf8574_RE.digitalWrite(P7,LOW);
delay(100);
}
else pcf8574_RE.digitalWrite(P7,HIGH);
delay(300);
}