uv1316t control

I'm trying to do this

http://qlfecv.wordpress.com/2012/11/14/r­eceptor-45-850-mhz-con-sintonizador-tv-a­nalogica-y-arduino/

is arduino code

I have as follows

function get_freq(div){
 return div*50-38900;
}
function get_band(fr){
 var bb;
 if (fr<110000)//fvhf
 bb=0x01;
 else if (fr<407000)
 bb=0x02;//VHF_H
 else
 bb=0x04;//UHF
 return bb;
}

function get_low(fr){
 var lo;
 var div;
 lo=fr+38900; // add FI
 div=lo/50;
 return (div & 0x00ff);
}

function get_high(fr){
 var lo;
 var div;
 lo=fr+38900; // add FI
 div=lo/50;
 return (div & 0xff00)>>8;
}

function mostrar(pos){
 var fr;
 var i;
 
  fr=get_freq(pos)*1000;
 i=fr/1000000;
 fr=fr%1000000;
 if (i<100)
 print(" ");
 print(i);
 print(".");
 i=fr/1000;
 fr=fr%1000;
 if(i==0)
 print("000");
 else if (i<10){
 print("00");
 }else if (i<100)
 print("0");
 if (i)
 print(i);
 print(".000 Hz");
 }

function tuner(fr)
{
  I2C1.writeTo(0xC2,[get_high(fr),get_low(­fr),0xCC,get_band(fr)]);
}
I2C1.setup({scl:B6, sda:B7}); // Setup I2C
I2C1.writeTo(0xC2,[0xFF]);

The function "tuner" does the major work but it does not seem to work since the tuner does not alter his tencion.
This one is a project that I would like to complete. If someone can check my code he would be grateful for it very much