require "ad4"
require "ad4_defines"

io.write("USB-AD Test of Analog IO\n")

x = ad4.open("usb-ad")
if x == -1 then
  print("Error")
else
 print("USB-AD opened.")
end

io.write("\nConnect MemADA-Dongle to USB-AD\n")
io.write("\nConnect An7 to GND - press any key\n")
io.read()

ret, volt = ad4.analog_in(x, An7, Range) 		-- Read Channel An3, Range +/- 5 V
print("Voltage =", volt)

io.write("\nConnect An12 to VCC - press any key\n")
io.read()

ret, volt = ad4.analog_in(x, An12, Range) 		-- Read Channel An12, Range +/- 5 V
print("Voltage =", volt)

io.write("\nConnect An12 to Aout - press any key\n")
io.read()

for v = 0, 5, 0.01 do
	ret, volt = ad4.analog_out(x, Aout, 1, v)
	--print(v,volt)										-- Wait one second for setup
	ret, volt = ad4.analog_in(x, An12, Range) 	-- Read Channel An12, Range +/- 5 V
	io.write(string.format("Aout = %.2f   Ain12 = %7.4f   Ain12-Aout = %7.4f\n", v, volt, volt-v))
end

x = ad4.close(x)
if x == 0 then
  print("USB-AD closed.")
else
  print("Error")
end