Twi_master_needs_byte:

 select case BTR
   case 1 : twi=0  'no move
   case 2 twi=100 'low of encoder val
   case 3 twi=150 'high of encoder val
 end select
 
Return
 

'this label is called when the master receives data and needs a byte
'the variable twi_btr is a byte variable that holds the index of the needed byte
'so when sending multiple bytes from an array, twi_btr can be used for the index
Twi_master_needs_byte:
  'Print "Master needs byte : " ; Twi_btr
  Select Case Twi_btr
    Case 1:                                                 ' first byte
              W = Getadc(0)                                 'in this example the conversion is done here
              ' but a better option would have been to just pass the value of W and do the conversion in the main loop
              'Print "ADC-SLAVE:" ; W
              Twi = Low(w)
    Case 2                                                  ' send second byte
              Twi = High(w)
  End Select
Return