PCA9635 I2C IO Expander

 #include "mbed.h"
 #include "PCA9635.h"
 
 DigitalOut enable(p26);
 PCA9635 my_driver(p28, p27);
 
 int main()
 {
     //REMEMBER enable 

     enable = 0;

     //N.B. you MUST declare init(int address), before calling any PCA9635 functions
     //turns each pin on and then off

     my_driver.init(0x02);

     short illuminate = 1;
     for(char j = 0; j < 16; j++){ 
         my_driver.bus(illuminate);
         wait(0.7);
         op = (op << 1);           //illuminate LEDs with port bit high
     }
 

    //ramp brightness up three times faster than down, repeatedly
     while(1)
     {
         for(char valueUp=0; valueUp<0xFF; (valueUp = valueUp + 3))
         {
             my_driver.brightness(ALL, valueUp);
         }
         
         for(char valueD=0; valueD<0xFF; valueD++)
         {
             my_driver.brightness(ALL, (0xFF - valueD));
             wait(0.007);
         }
    }
}