Rob the Fiddler

‘  # exclusive.bas  Robert Stave 2008
‘  # Simple PICAXE program to set pins where
‘  # the voltage on input 4 is translated to
‘  # 4 states (000, 100, 110, 111)
‘  #
‘  # Added code to simulate hysteresis

symbol readValue =4
symbol v0 = 0
symbol v1 = 1
symbol v2 = 2

symbol tmpValue=b10
symbol state = b8

init:
‘ ## initialize it all pins to zero

low v0
low v1
low v2
state = 0;

start:

‘ ### read value
readadc readValue,tmpValue

if tmpValue < 64 then stateZero
if tmpValue < 128 then stateOne
if tmpValue < 192 then stateTwo

stateThree:

low v0
low v1
high v2
state = 3
goto start

stateTwo:

‘ # check if we are above 186 if so and we
‘ # are coming from 3, just ignore it for now
if tmpValue > 186 then
if state = 3 then
goto start
endif
endif

low v0
high v1
low v2
state = 2
goto start

stateOne:

‘ # check if we are above 120 if so and we
‘ # are coming from 2, just ignore it for now
if tmpValue > 120 then
if state = 2 then
goto start
endif
endif

high v0
low v1
low v2
state = 1
goto start

stateZero:

‘ # check if we are above 58 if so and we
‘ # are coming from 1, just ignore it for now
if tmpValue > 58 then
if state = 1 then
goto start
endif
endif

low v0
low v1
low v2
state = 0

goto start