File content as of revision 0:1b13f03ce7eb:

#include "mbed.h"
#include "selection.h"
//define the PWM output port
PwmOut      PWMout(p21);

//define the address bit of MUX for multi-Vin
//MSB B_A LSB, NB an inverter - transiver
//     01   1st  100kHz
//     10   2rd  10kHz
//     11   3rd  1kHz
DigitalOut VAddrA1(p6);
DigitalOut VAddrA0(p5);

//define the address bit of MUX for ResistorArray
//MSB CBA LSB, NB an inverter - transiver
//    110   1st  1kohm
//    101   2rd  
//    100   3rd  
//    011   4th
//    010   5th
//    001   6th
//    000   7th
DigitalOut RAddrA0(p9);
DigitalOut RAddrA1(p10);
DigitalOut RAddrA2(p11);


void RAddr (int in)
{
    switch (in){
        case 0:RAddrA2=0;
                RAddrA1=0;
                RAddrA0=0;
                break;
                
        case 1:RAddrA2=0;
                RAddrA1=0;
                RAddrA0=1;
                break;
        case 2:RAddrA2=0;
                RAddrA1=1;
                RAddrA0=0;
                break;
        case 3: RAddrA2=0;
                RAddrA1=1;
                RAddrA0=1;
                break;
        case 4: RAddrA2=1;
                RAddrA1=0;
                RAddrA0=0;
                break;
        case 5: RAddrA2=1;
                RAddrA1=0;
                RAddrA0=1;
                break;
        case 6:RAddrA2=1;
                RAddrA1=1;
                RAddrA0=0;
                break;
        case 7:RAddrA2=1;
                RAddrA1=1;
                RAddrA0=1;
                break;
        default:RAddrA2=1;
                RAddrA1=1;
                RAddrA0=1;
    }  
}
void VAddr (int in)
{
    switch (in){
                     
        case 100:PWMout.period(0.00001f);    //100kHz_10us_0.00001s,
                PWMout.write(0.50f);      // 50% duty cycle, relative to period
                VAddrA1=0;
                VAddrA0=1;
                break;
        case 10:PWMout.period(0.0001f);    //10kHz_100us_0.0001s,
                PWMout.write(0.50f);      // 50% duty cycle, relative to period
                VAddrA1=1;
                VAddrA0=0;
                break;
        case 1: PWMout.period(0.001f);    //1kHz_1ms_0.001s,
                PWMout.write(0.50f);      // 50% duty cycle, relative to period
                VAddrA1=1;
                VAddrA0=1;
                break;
        default:PWMout.period(0.1f);    
                PWMout.write(0.50f);     // 50% duty cycle, relative to period
                VAddrA1=0;
                VAddrA0=0;    
    }  
}