I2C-Adressrechner (PCF8574)

#include "mbed.h"

// I2C 8-Bit Adressen fuer mbed OS
const int SLAVE_ADDR = 0x40; 

I2C i2c(I2C_SDA, I2C_SCL);

int main() {
    char data[1];
    data[0] = 0xFF; // Alle Ausgaenge HIGH
    
    // mbed write erwartet 8-Bit Adresse
    i2c.write(SLAVE_ADDR, data, 1);
    
    while(1) {
        // Superloop
    }
}