I whipped up a python component that accomplishes what I'm after.
My second question is for something like this what is an appropriate sleep time?
Code:
#!/usr/bin/env python3
import hal, time
h = hal.component("select4")
h.newpin("in0", hal.HAL_FLOAT, hal.HAL_IN)
h.newpin("in1", hal.HAL_FLOAT, hal.HAL_IN)
h.newpin("in2", hal.HAL_FLOAT, hal.HAL_IN)
h.newpin("in3", hal.HAL_FLOAT, hal.HAL_IN)
h.newpin("sel0", hal.HAL_BIT, hal.HAL_IN)
h.newpin("sel1", hal.HAL_BIT, hal.HAL_IN)
h.newpin("sel2", hal.HAL_BIT, hal.HAL_IN)
h.newpin("sel3", hal.HAL_BIT, hal.HAL_IN)
h.newpin("out", hal.HAL_FLOAT, hal.HAL_OUT)
h.ready()
last_selection = 'in0'
try:
while 1:
time.sleep(0.005)
if h['sel0']:
last_selection = 'in0'
elif h['sel1']:
last_selection = 'in1'
elif h['sel2']:
last_selection = 'in2'
elif h['sel3']:
last_selection = 'in3'
h['out'] = h[last_selection]
except KeyboardInterrupt:
raise SystemExit
