def test_simple_cool(self):
linkam = LinkamT95StreamInterface()
linkam_device = SimulatedLinkamT95()
linkam.device = linkam_device
linkam_device.process() # Initialize
# Issue T command to get into stopped state
linkam.get_status()
linkam_device.process()
# Set up to cool from 24.0 C to 4.0 C at 20.00 C/min
linkam.set_rate('2000')
linkam.set_limit('40')
linkam.start()
linkam_device.process()
# Cool for almost a minute but not quite
linkam_device.process(59.5)
status_bytes = linkam.get_status()
self.assertEqual(status_bytes[0], '\x20') # Cooling status set
self.assertNotEqual(status_bytes[6:10], '0028') # Temp != 4.0 C
# Finish off cooling (and overshoot a bit)
linkam_device.process(5)
status_bytes = linkam.get_status()
self.assertEqual(status_bytes[6:10], '0028') # Temp == 4.0 C
# Should hold now, so temperature should not change
linkam_device.process(10)
status_bytes = linkam.get_status()
self.assertEqual(status_bytes[0], '\x30') # Auto-holding at limit
self.assertEqual(status_bytes[6:10], '0028') # Temp == 4.0 C
def test_pump_command(self):
linkam = LinkamT95StreamInterface()
linkam_device = SimulatedLinkamT95()
linkam.device = linkam_device
linkam_device.process() # Initialize
# Issue T command to get into stopped state
linkam.get_status()
linkam_device.process()
# Set up to cool from 24.0 C to 4.0 C at 20.00 C/min
linkam.set_rate('2000')
linkam.set_limit('40')
linkam.start()
linkam_device.process()
# Since the pump feature is not fully implemented,
# we can only make sure all valid input is accepted
assertRaisesNothing(self, linkam.pump_command, 'm0') # Manual
linkam_device.process()
for int_value, char_value in enumerate(
"0123456789:;<=>?@ABCDEFGHIJKLMN"):
assertRaisesNothing(self, linkam.pump_command,
char_value) # Characters mean speeds 0 - 30
linkam_device.process()
status_bytes = linkam.get_status()
self.assertEqual(
status_bytes[2],
chr(0x80
| int_value)) # Verify Pump Status Byte reflects speed
assertRaisesNothing(self, linkam.pump_command, 'a0') # Auto
linkam_device.process()
def test_stop_command(self):
linkam = LinkamT95StreamInterface()
linkam_device = SimulatedLinkamT95()
linkam.device = linkam_device
linkam_device.process() # Initialize
# Issue T command to get into stopped state
linkam.get_status()
linkam_device.process()
# Set up to heat from 24.0 C to 44.0 C at 20.00 C/min
linkam.set_rate('2000')
linkam.set_limit('440')
linkam.start()
linkam_device.process()
# Process for some time and then stop
linkam_device.process(10)
linkam.stop()
linkam_device.process()
# Ensure status byte reports stopped
status_bytes = linkam.get_status()
self.assertEqual(ord(status_bytes[0]), 0x01)
def test_error_flag_overcool(self):
linkam = LinkamT95StreamInterface()
linkam_device = SimulatedLinkamT95()
linkam.device = linkam_device
linkam_device.process() # Initialize
# Issue T command to get into stopped state
linkam.get_status()
linkam_device.process()
# Ensure flag is not set
status_bytes = linkam.get_status()
self.assertFalse(ord(status_bytes[1]) & 0x01)
# Set up to cool from 24.0 C to 4.0 C at 51.00 C/min
linkam.set_rate('5100')
linkam.set_limit('40')
linkam.start()
linkam_device.process()
# Ensure flag is set after running a bit
linkam_device.process(0.1)
status_bytes = linkam.get_status()
self.assertTrue(ord(status_bytes[1]) & 0x01)
def test_simple_heat(self):
linkam = LinkamT95StreamInterface()
linkam_device = SimulatedLinkamT95()
linkam.device = linkam_device
linkam_device.process() # Initialize
# Issue T command to get into stopped state
linkam.get_status()
linkam_device.process()
# Set up to heat from 24.0 C to 44.0 C at 20.00 C/min
linkam.set_rate("2000")
linkam.set_limit("440")
linkam.start()
linkam_device.process()
# Heat for almost a minute but not quite
linkam_device.process(59.5)
status_bytes = linkam.get_status()
self.assertEqual(0x10, status_bytes[0], "Heating status set")
self.assertNotEqual(status_bytes[6:10], b"01b8") # Temp != 44.0 C
# Finish off heating (and overshoot a bit)
linkam_device.process(5)
status_bytes = linkam.get_status()
self.assertEqual(status_bytes[6:10], b"01b8") # Temp == 44.0 C
# Should hold now, so temperature should not change
linkam_device.process(10)
status_bytes = linkam.get_status()
self.assertEqual(0x30, status_bytes[0], "Auto-holding at limit")
self.assertEqual(status_bytes[6:10], b"01b8") # Temp == 44.0 C
def test_hold_and_resume(self):
linkam = LinkamT95StreamInterface()
linkam_device = SimulatedLinkamT95()
linkam.device = linkam_device
linkam_device.process() # Initialize
# Issue T command to get into stopped state
linkam.get_status()
linkam_device.process()
# Set up to cool from 24.0 C to 4.0 C at 20.00 C/min
linkam.set_rate('2000')
linkam.set_limit('40')
linkam.start()
linkam_device.process()
# Cool for a while
linkam_device.process(30)
status_bytes = linkam.get_status()
self.assertEqual(status_bytes[0], '\x20') # Cooling status set
self.assertNotEqual(status_bytes[6:10], '0028') # Temp != 4.0 C
# Hold for a while
linkam.hold()
linkam_device.process(30)
status_bytes = linkam.get_status()
self.assertEqual(status_bytes[0], '\x50') # Manually holding
self.assertNotEqual(status_bytes[6:10], '0028') # Temp != 4.0 C
# Cool some more
linkam.cool()
linkam_device.process(15)
status_bytes = linkam.get_status()
self.assertNotEqual(status_bytes[6:10], '0028') # Temp != 4.0 C
# Hold again
linkam.hold()
linkam_device.process(30)
status_bytes = linkam.get_status()
self.assertEqual(status_bytes[0], '\x50') # Manually holding
self.assertNotEqual(status_bytes[6:10], '0028') # Temp != 4.0 C
# Finish cooling via heat command (should also work)
linkam.heat()
linkam_device.process(15)
status_bytes = linkam.get_status()
self.assertEqual(status_bytes[6:10], '0028') # Temp == 4.0 C
# Make sure transitions to auto-holding
linkam_device.process()
status_bytes = linkam.get_status()
self.assertEqual(status_bytes[0], '\x30') # Auto-holding at limit
def test_default_status(self):
linkam = LinkamT95StreamInterface()
linkam.device = SimulatedLinkamT95()
status_bytes = linkam.get_status()
self.assertEqual(len(status_bytes), 10, "Byte array should always be 10 bytes")
self.assertFalse(b"\x00" in status_bytes, "Byte array may not contain zeroes")
self.assertEqual(0x01, status_bytes[0], "Status byte should be 1 on startup")
self.assertEqual(
0x80, status_bytes[1], "No error flags should be set on startup"
)
self.assertEqual(
0x80, status_bytes[2], "The pump should not be active on startup"
)
self.assertEqual(b"00f0", status_bytes[6:10], "Starting temperature 24C")
def test_default_status(self):
linkam = LinkamT95StreamInterface()
linkam.device = SimulatedLinkamT95()
status_bytes = linkam.get_status()
self.assertEqual(len(status_bytes),
10) # Byte array should always be 10 bytes
self.assertFalse('\x00'
in status_bytes) # Byte array may not contain zeroes
self.assertEqual(status_bytes[0],
'\x01') # Status byte should be 1 on startup
self.assertEqual(status_bytes[1],
'\x80') # No error flags should be set on startup
self.assertEqual(status_bytes[2],
'\x80') # The pump should not be active on startup
self.assertEqual(status_bytes[6:10],
'00f0') # Starting temperature 24C