File content as of revision 0:feff35de571d:

#include "mbed.h"
#include "PCF8575.h"

Serial pc(USBTX, USBRX); // tx, rx

//SETUP AND INITIAL DEFINITION
PCF8575 IC(p9, p10, 0x40);          // 0x40 means the A0-2 is LOW
PCF8575 IC2(p9, p10, 0x44);         // 0x42 means the A0 is HIGH and A1-2 is LOW
DigitalOut myled(LED1);

char seventeen = 0xFF00;
int sixteen = 0x4000;
int fifteen = 0x2000;
int fourteen = 0x1000;
int thirteen = 0x0800;
int twelve = 0x0400;
int eleven = 0x0200;
int ten = 0x0100;
int seven = 0x0080;
int six = 0x0040;
int five = 0x0020;
int four = 0x0010;
int three = 0x0008;
int two = 0x0004;
int one = 0x0002;
int zero = 0x0001;  


int main()
{
    pc.printf("Start");
    while (1) {
        IC.write(seventeen);
        IC.write(zero); 
         
        
        //IC2.write(0xFFFF);
        myled = 1;
          
   
        wait(1);

        IC.write(0x0000);
        //IC2.write(0x0000);
        myled=0;
        wait(1);
  
    }
}