'Encoder for Rookey Kit
'v1.0, 04/29/07
'G.Heron, N2APB 
'
'This is the code for the general purpose encoding of two bits (code0 and code1)
'that will be decoded in the Decoder program to select one of four functions.
'
'116 is approx 1000 Hz in sound command
'pin 0 is dedicated to programming'
'pins 1-3 are inputs; high is active
'pin 4 is tone output

symbol code0 = pin1
symbol code1 = pin2


'****************
'START OF PROGRAM
'****************

main: 
    sound 4, (116,50)              'output 500ms start pulse
    pause 50                       'wait 50ms for start pulse delimiter

      ;Send codes 0 and 1, based on state of jumper block

    if code0 = 0 then m1
    sound 4, (116,5)
    goto m2
m1: pause 50

m2: if code1 = 0 then m3
    sound 4, (116,5)
    goto Send_Stop
m3: pause 50

	;Issue 500ms stop delay

Send_Stop: 
    pause 500                        'output stop pulse
    goto main				 'and go do again