[arduino code examples for DM32]-02 Read digital input ports state

Code:
#include <Wire.h>

#include "PCF8575.h"



#define I2C_SDA 8

#define I2C_SCL 18



PCF8575 pcf8575_IN1(0x22); // DI1–DI16

PCF8575 pcf8575_IN2(0x24); // DI17–DI32



uint8_t pin_order_dm16[16] = {

    8, 9, 10, 11, 12, 13, 14, 15,

    0, 1, 2, 3, 4, 5, 6, 7

};



uint8_t pin_order_ext[16] = {

    0, 1, 2, 3, 4, 5, 6, 7,

    8, 9, 10, 11, 12, 13, 14, 15

};



void setup() {

    Serial.begin(115200);

    Wire.begin(I2C_SDA, I2C_SCL);



    pcf8575_IN1.begin();

    pcf8575_IN2.begin();



    Serial.println("DI1–DI32 (0=ON 1=OFF)");

}



void loop() {

    Serial.print("DI1–DI32: ");



    // DI1–DI16

    for (int i = 0; i < 16; i++) {

        Serial.print(pcf8575_IN1.read(pin_order_dm16[i]));

        Serial.print(" ");

    }



    // DI17–DI32

    for (int i = 0; i < 16; i++) {

        Serial.print(pcf8575_IN2.read(pin_order_ext[i]));

        Serial.print(" ");

    }



    Serial.println();

    delay(500);

}