Comments (11)
Hi anubok,
BIP5VOLTS is a valid range when you are configured for differential input mode, but if you are configured for single ended, use BIP10VOLTS exclusively (same range works for differential).
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Hello Anushree,
You can programmatically change the front end configuration. You were close, Use this function instead:
ul.a_input_mode(board_num, input_mode)
Where board_num is the board number in InstaCal or created during Device Discovery()
input_mode = AnalogInputMode.SINGLE_ENDED
or
input_mode = AnalogInputMode.DIFFERENTIAL
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Yes, changing the board number is how you alternate between the different devices you have in your system/configuration.
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Hi Anushree
I believe I see where you went wrong. You are creating 1 single variable called device and then overwriting it each time with a different MCC Device.
I created a test app for this, so I could show it to you. Here are the important pieces:
Instance of 3 devices:
ul.ignore_instacal()
self.create_widgets()
self.discover_devices()
def discover_devices(self):
# Get the device inventory
self.inventory = ul.get_daq_device_inventory(InterfaceType.USB)
for self.board_num in range (0,3):
if len(self.inventory) > 0:
if self.board_num == 0:
self.device0 = self.inventory[self.board_num]
if self.board_num == 1:
self.device1 = self.inventory[self.board_num]
if self.board_num == 2:
self.device2 = self.inventory[self.board_num]
if self.device0 != None:
self.board_num = 0
ul.create_daq_device(self.board_num, self.device0)
ul.flash_led(self.board_num)
self.device_0_id_label["text"] = self.device0.unique_id
self.device_0_name_label["text"] = self.device0.product_name
ul.a_input_mode(self.board_num, AnalogInputMode.SINGLE_ENDED)
self.ai_props = AnalogInputProps(self.board_num)
self.ao_props = AnalogOutputProps(self.board_num)
if self.device1 != None:
self.board_num = 1
ul.create_daq_device(self.board_num, self.device1)
ul.flash_led(self.board_num)
self.device_1_id_label["text"] = self.device1.unique_id
self.device_1_name_label["text"] = self.device1.product_name
ul.a_input_mode(self.board_num, AnalogInputMode.SINGLE_ENDED)
self.ai_props = AnalogInputProps(self.board_num)
self.ao_props = AnalogOutputProps(self.board_num)
if self.device2 != None:
self.board_num = 2
ul.create_daq_device(self.board_num, self.device2)
ul.flash_led(self.board_num)
self.device_2_id_label["text"] = self.device2.unique_id
self.device_2_name_label["text"] = self.device2.product_name
ul.a_input_mode(self.board_num, AnalogInputMode.SINGLE_ENDED)
self.ai_props = AnalogInputProps(self.board_num)
self.ao_props = AnalogOutputProps(self.board_num)
###Note I created device0, device1, and device2
to read the various voltages:
def update_value(self):
try:
self.board_num = 0
channel = 0
ai_range = ULRange.BIP10VOLTS
value = ul.v_in(self.board_num, channel, ai_range)
self.value_0_label["text"] = '{:.4f}'.format(value)
self.board_num = 1
channel = 0
ai_range = ULRange.BIP10VOLTS
value = ul.v_in(self.board_num, channel, ai_range)
self.value_1_label["text"] = '{:.4f}'.format(value)
self.board_num = 2
channel = 0
ai_range = ULRange.BIP10VOLTS
value = ul.v_in(self.board_num, channel, ai_range)
self.value_2_label["text"] = '{:.4f}'.format(value)
if self.running:
self.after(100, self.update_value)
except ULError as e:
self.show_ul_error(e)
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Hi,
I am using Python 2.7.14 in Cygwin on a Windows 10 machine. I don't see installation tasks for this setup. Can you point me in the right direction to get this running?
Thanks,
Jack
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Also, I am evaluating an MC USB-1208FS device. Thanks, Jack
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Hello Jack,
Our drivers were never tested with Cygwin. It is not believed they are compatible.
Cygwin is a virtual Linux environment running on Windows and cannot use our Windows hardware drivers. Conversely, since Cygwin is emulating Linux, it cannot use our Linux hardware drivers either since it is running on Windows.
Best regards,
Jeff
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Related Issues (20)
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