I2C1.setup({scl:B6, sda:B7})

LCD.prototype.write = function(x, c) {
  var f = (x&0xF0) |8| ((c==undefined)?1:0); print(f);
  I2C1.writeTo(0x27, f);                       
  I2C1.writeTo(0x27, f | 4); 
  I2C1.writeTo(0x27, f);     
  var f = ((x<<4)&0xF0) |8| ((c==undefined)?1:0); print(f);
  I2C1.writeTo(0x27, f);                                   
  I2C1.writeTo(0x27, f | 4);                   
  I2C1.writeTo(0x27, f);      
}; 

function LCD(i2c) {                                        
 this.i2c = i2c;
 this.write(0x33,1);                                       
 this.write(0x32,1);                           
 this.write(0x28,1);          
 this.write(0x0C,1);     
 this.write(0x06,1);                                       
 this.write(0x01,1);                           
}   
LCD.prototype.write = function(x, c) {
  var a = (x&0xF0) |8| ((c==undefined)?1:0); 
  var b = ((x<<4)&0xF0) |8| ((c==undefined)?1:0); 
  this.i2c.writeTo(0x27, [a,a|4,a,b,b|4,b]);
};