def scan_loop(self):
rate = 100
points_per_channel = 10
low_chan = 0 # Ignored by a_in_scan when queue is enabled
high_chan = 3 # Ignored by a_in_scan when queue is enabled
num_channels = high_chan - low_chan + 1
total_count = points_per_channel * num_channels
# Ignored by a_in_scan when queue is enabled
range_ = self.ai_props.available_ranges[0]
# Allocate a buffer for the scan
if self.ai_props.resolution <= 16:
# Use the win_buf_alloc method for devices with a resolution <= 16
memhandle = ul.win_buf_alloc(total_count)
else:
# Use the win_buf_alloc_32 method for devices with a resolution >
# 16
memhandle = ul.win_buf_alloc_32(total_count)
# Check if the buffer was successfully allocated
if not memhandle:
messagebox.showerror("Error", "Failed to allocate memory")
return
try:
# Run the scan
ul.a_in_scan(self.board_num, low_chan, high_chan, total_count,
rate, range_, memhandle, 0)
# Convert the memhandle to a ctypes array
# Note: the ctypes array will only be valid until win_buf_free
# is called.
# A copy of the buffer can be created using win_buf_to_array
# or win_buf_to_array_32 before the memory is freed. The copy can
# be used at any time.
if self.ai_props.resolution <= 16:
# Use the memhandle_as_ctypes_array method for devices with a
# resolution <= 16
array = self.memhandle_as_ctypes_array(memhandle)
else:
# Use the memhandle_as_ctypes_array_32 method for devices with
# a resolution > 16
array = self.memhandle_as_ctypes_array_32(memhandle)
# Display the values
self.display_values(array, total_count)
self.after(1000, self.scan_loop)
except ULError as e:
self.show_ul_error(e)
finally:
# Free the allocated memory
ul.win_buf_free(memhandle)
def start_scan(self):
rate = 100
points_per_channel = 100
total_count = points_per_channel * self.num_chans
scan_options = ScanOptions.BACKGROUND | ScanOptions.CONTINUOUS
# Allocate a buffer for the scan
if self.resolution <= 16:
self.memhandle = ul.win_buf_alloc(total_count)
else:
self.memhandle = ul.win_buf_alloc_32(total_count)
# Check if the buffer was successfully allocated
if not self.memhandle:
messagebox.showerror("Error", "Failed to allocate memory")
self.start_button["state"] = tk.NORMAL
return
try:
# Run the scan
ul.daq_in_scan(
self.board_num, self.chan_list, self.chan_type_list,
self.gain_list, self.num_chans, rate, 0, total_count, self.memhandle,
scan_options)
# Cast the memhandle to a ctypes pointer
# Note: the ctypes array will only be valid until win_buf_free
# is called.
# A copy of the buffer can be created using win_buf_to_array
# or win_buf_to_array_32 before the memory is freed. The copy can
# be used at any time.
if self.resolution <= 16:
# Use the memhandle_as_ctypes_array method for devices with a
# resolution <= 16
self.array = self.memhandle_as_ctypes_array(self.memhandle)
else:
# Use the memhandle_as_ctypes_array_32 method for devices with a
# resolution > 16
self.array = self.memhandle_as_ctypes_array_32(self.memhandle)
except ULError as e:
# Free the allocated memory
ul.win_buf_free(self.memhandle)
self.show_ul_error(e)
return
# Start updating the displayed values
self.update_displayed_values()
def start_scan(self):
rate = 100
points_per_channel = 10
total_count = points_per_channel * self.num_chans
# Allocate a buffer for the scan
if self.resolution <= 16:
memhandle = ul.win_buf_alloc(total_count)
else:
memhandle = ul.win_buf_alloc_32(total_count)
# Check if the buffer was successfully allocated
if not memhandle:
messagebox.showerror("Error", "Failed to allocate memory")
self.start_button["state"] = tk.NORMAL
return
try:
# Run the scan
ul.daq_in_scan(self.board_num, self.chan_list, self.chan_type_list,
self.gain_list, self.num_chans, rate, 0,
total_count, memhandle, 0)
# Cast the memhandle to a ctypes pointer
# Note: the ctypes array will only be valid until win_buf_free
# is called.
# A copy of the buffer can be created using win_buf_to_array
# or win_buf_to_array_32 before the memory is freed. The copy can
# be used at any time.
if self.resolution <= 16:
# Use the memhandle_as_ctypes_array method for devices with a
# resolution <= 16
array = cast(memhandle, POINTER(c_ushort))
else:
# Use the memhandle_as_ctypes_array_32 method for devices with
# a resolution > 16
array = cast(memhandle, POINTER(c_ulong))
# Display the values
self.display_values(array, total_count)
except ULError as e:
show_ul_error(e)
finally:
# Free the allocated memory
ul.win_buf_free(memhandle)
self.start_button["state"] = tk.NORMAL
def start_scan(self):
rate = 100
total_count = 10
# Allocate a buffer for the scan
memhandle = ul.win_buf_alloc_32(total_count)
# Check if the buffer was successfully allocated
if not memhandle:
messagebox.showerror("Error", "Failed to allocate memory")
self.start_button["state"] = tk.NORMAL
return
try:
mode = CounterMode.ENCODER + CounterMode.ENCODER_MODE_X1 \
+ CounterMode.ENCODER_MODE_CLEAR_ON_Z_ON
debounce_time = CounterDebounceTime.DEBOUNCE_NONE
debounce_mode = 0
edge_detection = CounterEdgeDetection.RISING_EDGE
tick_size = CounterTickSize.TICK20PT83ns
mapped_channel = 2
# Configure the first counter channel for Encoder mode
ul.c_config_scan(self.board_num, self.chan_num, mode,
debounce_time, debounce_mode, edge_detection,
tick_size, mapped_channel)
# Run the scan
ul.c_in_scan(self.board_num, self.chan_num, self.chan_num,
total_count, rate, memhandle, 0)
# Convert the memhandle to a ctypes array
# Note: the ctypes array will only be valid until win_buf_free
# is called.
# A copy of the buffer can be created using win_buf_to_array_32
# before the memory is freed. The copy can be used at any time.
array = self.memhandle_as_ctypes_array_32(memhandle)
# Display the values
self.display_values(array, total_count)
except ULError as e:
self.show_ul_error(e)
finally:
# Free the allocated memory
ul.win_buf_free(memhandle)
self.start_button["state"] = tk.NORMAL
def start_scan(self):
low_chan = self.get_low_channel_num()
high_chan = self.get_high_channel_num()
if low_chan > high_chan:
messagebox.showerror(
"Error", "Low Channel Number must be greater than or equal "
"to High Channel Number")
self.start_button["state"] = tk.NORMAL
return
rate = 100
points_per_channel = 10
num_channels = high_chan - low_chan + 1
total_count = points_per_channel * num_channels
# Allocate a buffer for the scan
memhandle = ul.win_buf_alloc_32(total_count)
# Check if the buffer was successfully allocated
if not memhandle:
messagebox.showerror("Error", "Failed to allocate memory")
self.start_button["state"] = tk.NORMAL
return
try:
# Run the scan
ul.c_in_scan(self.board_num, low_chan, high_chan, total_count,
rate, memhandle, 0)
# Convert the memhandle to a ctypes array
# Note: the ctypes array will only be valid until win_buf_free
# is called.
# A copy of the buffer can be created using win_buf_to_array_32
# before the memory is freed. The copy can be used at any time.
array = self.memhandle_as_ctypes_array_32(memhandle)
# Display the values
self.display_values(array, total_count, low_chan, high_chan)
except ULError as e:
self.show_ul_error(e)
finally:
# Free the allocated memory
ul.win_buf_free(memhandle)
self.start_button["state"] = tk.NORMAL
def start_scan(self):
rate = 390
total_count = 100
# Allocate a buffer for the scan
memhandle = ul.win_buf_alloc_32(total_count)
# Check if the buffer was successfully allocated
if not memhandle:
messagebox.showerror("Error", "Failed to allocate memory")
self.start_button["state"] = tk.NORMAL
return
try:
# Configure the counter
ul.c_config_scan(
self.board_num, self.chan_num, CounterMode.DECREMENT_ON,
CounterDebounceTime.DEBOUNCE_NONE, 0,
CounterEdgeDetection.FALLING_EDGE,
CounterTickSize.TICK20PT83ns, 1)
# Run the scan
ul.c_in_scan(
self.board_num, self.chan_num, self.chan_num, total_count,
rate, memhandle, 0)
# Convert the memhandle to a ctypes array
# Note: the ctypes array will only be valid until win_buf_free
# is called.
# A copy of the buffer can be created using win_buf_to_array_32
# before the memory is freed. The copy can be used at any time.
array = cast(memhandle, POINTER(c_ulong))
# Display the values
self.display_values(array, total_count)
except ULError as e:
show_ul_error(e)
finally:
# Free the allocated memory
ul.win_buf_free(memhandle)
self.start_button["state"] = tk.NORMAL
def start_scan(self):
self.low_chan = self.get_low_channel_num()
self.high_chan = self.get_high_channel_num()
self.num_chans = self.high_chan - self.low_chan + 1
if self.low_chan > self.high_chan:
messagebox.showerror(
"Error",
"Low Channel Number must be greater than or equal to High "
"Channel Number")
self.set_ui_idle_state()
return
rate = 100
points_per_channel = 1000
total_count = points_per_channel * self.num_chans
ai_range = self.ai_info.supported_ranges[0]
# Allocate a buffer for the scan
if self.ai_info.resolution <= 16:
# Use the win_buf_alloc method for devices with a resolution <=
# 16
self.memhandle = ul.win_buf_alloc(total_count)
# Convert the memhandle to a ctypes array
# Use the memhandle_as_ctypes_array method for devices with a
# resolution <= 16
self.ctypes_array = cast(self.memhandle, POINTER(c_ushort))
else:
# Use the win_buf_alloc_32 method for devices with a resolution
# > 16
self.memhandle = ul.win_buf_alloc_32(total_count)
# Use the memhandle_as_ctypes_array_32 method for devices with a
# resolution > 16
self.ctypes_array = cast(self.memhandle, POINTER(c_ulong))
# Note: the ctypes array will no longer be valid after
# win_buf_free is called.
# A copy of the buffer can be created using win_buf_to_array
# or win_buf_to_array_32 before the memory is freed. The copy
# can be used at any time.
# Check if the buffer was successfully allocated
if not self.memhandle:
messagebox.showerror("Error", "Failed to allocate memory")
self.set_ui_idle_state()
return
# Create the frames that will hold the data
self.recreate_data_frame()
try:
# Start the scan
ul.a_in_scan(self.board_num, self.low_chan, self.high_chan,
total_count, rate, ai_range, self.memhandle,
ScanOptions.BACKGROUND)
except ULError as e:
show_ul_error(e)
self.set_ui_idle_state()
return
# Start updating the displayed values
self.update_displayed_values()
def start_scan(self):
low_chan = self.get_low_channel_num()
high_chan = self.get_high_channel_num()
if low_chan > high_chan:
messagebox.showerror(
"Error", "Low Channel Number must be greater than or equal to "
"High Channel Number")
self.start_button["state"] = tk.NORMAL
return
rate = 1000
points_per_channel = 10
num_channels = high_chan - low_chan + 1
total_count = points_per_channel * num_channels
range_ = self.ai_props.available_ranges[0]
trig_type = TrigType.TRIG_ABOVE
low_threshold_volts = 0.1
high_threshold_volts = 1.53
# Allocate a buffer for the scan
if self.ai_props.resolution <= 16:
# Use the win_buf_alloc method for devices with a resolution <= 16
memhandle = ul.win_buf_alloc(total_count)
else:
# Use the win_buf_alloc_32 method for devices with a resolution >
# 16
memhandle = ul.win_buf_alloc_32(total_count)
# Check if the buffer was successfully allocated
if not memhandle:
messagebox.showerror("Error", "Failed to allocate memory")
self.start_button["state"] = tk.NORMAL
return
try:
low_threshold, high_threshold = self.get_threshold_counts(
range_, low_threshold_volts, high_threshold_volts)
ul.set_trigger(self.board_num, trig_type, low_threshold,
high_threshold)
# Run the scan
ul.a_in_scan(self.board_num, low_chan, high_chan, total_count,
rate, range_, memhandle, ScanOptions.EXTTRIGGER)
# Convert the memhandle to a ctypes array
# Note: the ctypes array will only be valid until win_buf_free
# is called.
# A copy of the buffer can be created using win_buf_to_array
# or win_buf_to_array_32 before the memory is freed. The copy can
# be used at any time.
if self.ai_props.resolution <= 16:
# Use the memhandle_as_ctypes_array method for devices with a
# resolution <= 16
array = self.memhandle_as_ctypes_array(memhandle)
else:
# Use the memhandle_as_ctypes_array_32 method for devices with
# a resolution > 16
array = self.memhandle_as_ctypes_array_32(memhandle)
# Display the values
self.display_values(array, range_, total_count, low_chan,
high_chan)
except ULError as e:
self.show_ul_error(e)
finally:
# Free the allocated memory
ul.win_buf_free(memhandle)
self.start_button["state"] = tk.NORMAL
def start_scan(self):
low_chan = self.get_low_channel_num()
high_chan = self.get_high_channel_num()
if low_chan > high_chan:
messagebox.showerror(
"Error",
"Low Channel Number must be greater than or equal to High "
"Channel Number")
self.start_button["state"] = tk.NORMAL
return
rate = 100
points_per_channel = 10
num_channels = high_chan - low_chan + 1
total_count = points_per_channel * num_channels
ai_range = self.ai_info.supported_ranges[0]
# Allocate a buffer for the scan
if self.ai_info.resolution <= 16:
# Use the win_buf_alloc method for devices with a resolution
# <= 16
memhandle = ul.win_buf_alloc(total_count)
else:
# Use the win_buf_alloc_32 method for devices with a resolution
# > 16
memhandle = ul.win_buf_alloc_32(total_count)
# Check if the buffer was successfully allocated
if not memhandle:
messagebox.showerror("Error", "Failed to allocate memory")
self.start_button["state"] = tk.NORMAL
return
try:
# Run the scan
ul.a_in_scan(self.board_num, low_chan, high_chan, total_count,
rate, ai_range, memhandle, 0)
# Cast the memhandle to a ctypes pointer
# Note: the ctypes array will only be valid until win_buf_free
# is called.
# A copy of the buffer can be created using win_buf_to_array
# or win_buf_to_array_32 before the memory is freed. The copy
# can be used at any time.
if self.ai_info.resolution <= 16:
# Use the memhandle_as_ctypes_array method for devices with
# a resolution <= 16
array = cast(memhandle, POINTER(c_ushort))
else:
# Use the memhandle_as_ctypes_array_32 method for devices
# with a resolution > 16
array = cast(memhandle, POINTER(c_ulong))
# Display the values
self.display_values(array, ai_range, total_count, low_chan,
high_chan)
except ULError as e:
show_ul_error(e)
finally:
# Free the allocated memory
ul.win_buf_free(memhandle)
self.start_button["state"] = tk.NORMAL
def start_input_scan(self):
self.input_low_chan = self.get_input_low_channel_num()
self.input_high_chan = self.get_input_high_channel_num()
self.num_input_chans = (self.input_high_chan - self.input_low_chan + 1)
self.periodtime = int(
self.periodbox.get()) # variable of the duration in sec
self.periodtimevar = self.periodtime # a placeholder of periodtime which can be changed
if self.input_low_chan > self.input_high_chan:
messagebox.showerror(
"Error",
"Low Channel Number must be greater than or equal to High "
"Channel Number")
self.set_input_ui_idle_state()
return
rate = int(
self.input_Samplingrate.get()) # data sampling rate per second
# self.samplingrate = rate
points_per_channel = self.test_time()
total_count = points_per_channel * self.num_input_chans
range_ = self.ai_props.available_ranges[0]
scan_options = ScanOptions.BACKGROUND | ScanOptions.CONTINUOUS
# Allocate a buffer for the scan
if self.ai_props.resolution <= 16:
# Use the win_buf_alloc method for devices with a resolution <=
# 16
self.input_memhandle = ul.win_buf_alloc(total_count)
else:
# Use the win_buf_alloc_32 method for devices with a resolution
# > 16
self.input_memhandle = ul.win_buf_alloc_32(total_count)
if not self.input_memhandle:
messagebox.showerror("Error", "Failed to allocate memory")
self.set_input_ui_idle_state()
return
# Create the frames that will hold the data
self.recreate_input_data_frame()
try:
# Run the scan
ul.a_in_scan(self.board_num, self.input_low_chan,
self.input_high_chan, total_count, rate, range_,
self.input_memhandle, scan_options)
except ULError as e:
self.show_ul_error(e)
self.set_input_ui_idle_state()
return
# Convert the input_memhandle to a ctypes array
# Note: the ctypes array will no longer be valid after win_buf_free is called.
# A copy of the buffer can be created using win_buf_to_array
# or win_buf_to_array_32 before the memory is freed. The copy can
# be used at any time.
if self.ai_props.resolution <= 16:
# self.copied_array = ul.win_buf_to_array(self.iput_memhandle)
# Use the memhandle_as_ctypes_array method for devices with a
# resolution <= 16
self.ctypes_array = self.memhandle_as_ctypes_array(
self.input_memhandle)
else:
# Use the memhandle_as_ctypes_array_32 method for devices with a
# resolution > 16
self.ctypes_array = self.memhandle_as_ctypes_array_32(
self.input_memhandle)
# Start updating the displayed values
self.update_input_displayed_values(range_)
# Start the arena output
self.tempo = 2.2
self.update_arena_output()
def run_example():
board_num = 0
rate = 100
points_per_channel = 1000
if use_device_detection:
ul.ignore_instacal()
if not util.config_first_detected_device(board_num):
print("Could not find device.")
return
ai_props = AnalogInputProps(board_num)
if ai_props.num_ai_chans < 1:
util.print_unsupported_example(board_num)
return
low_chan = 0
high_chan = min(3, ai_props.num_ai_chans - 1)
num_chans = high_chan - low_chan + 1
total_count = points_per_channel * num_chans
ai_range = ai_props.available_ranges[0]
scan_options = ScanOptions.BACKGROUND
if ScanOptions.SCALEDATA in ai_props.supported_scan_options:
# If the hardware supports the SCALEDATA option, it is easiest to
# use it.
scan_options |= ScanOptions.SCALEDATA
memhandle = ul.scaled_win_buf_alloc(total_count)
# Convert the memhandle to a ctypes array.
# Use the memhandle_as_ctypes_array_scaled method for scaled
# buffers.
ctypes_array = util.memhandle_as_ctypes_array_scaled(memhandle)
elif ai_props.resolution <= 16:
# Use the win_buf_alloc method for devices with a resolution <= 16
memhandle = ul.win_buf_alloc(total_count)
# Convert the memhandle to a ctypes array.
# Use the memhandle_as_ctypes_array method for devices with a
# resolution <= 16.
ctypes_array = util.memhandle_as_ctypes_array(memhandle)
else:
# Use the win_buf_alloc_32 method for devices with a resolution > 16
memhandle = ul.win_buf_alloc_32(total_count)
# Convert the memhandle to a ctypes array.
# Use the memhandle_as_ctypes_array_32 method for devices with a
# resolution > 16
ctypes_array = util.memhandle_as_ctypes_array_32(memhandle)
# Note: the ctypes array will no longer be valid after win_buf_free is
# called.
# A copy of the buffer can be created using win_buf_to_array or
# win_buf_to_array_32 before the memory is freed. The copy can be used
# at any time.
# Check if the buffer was successfully allocated
if not memhandle:
print("Failed to allocate memory.")
return
try:
# Start the scan
ul.a_in_scan(board_num, low_chan, high_chan, total_count, rate,
ai_range, memhandle, scan_options)
# Create a format string that aligns the data in columns
row_format = "{:>12}" * num_chans
# Print the channel name headers
labels = []
for ch_num in range(low_chan, high_chan + 1):
labels.append("CH" + str(ch_num))
print(row_format.format(*labels))
# Start updating the displayed values
status, curr_count, curr_index = ul.get_status(board_num,
FunctionType.AIFUNCTION)
while status != Status.IDLE:
# Make sure a data point is available for display.
if curr_count > 0:
# curr_index points to the start of the last completed
# channel scan that was transferred between the board and
# the data buffer. Display the latest value for each
# channel.
display_data = []
for data_index in range(curr_index, curr_index + num_chans):
if ScanOptions.SCALEDATA in scan_options:
# If the SCALEDATA ScanOption was used, the values
# in the array are already in engineering units.
eng_value = ctypes_array[data_index]
else:
# If the SCALEDATA ScanOption was NOT used, the
# values in the array must be converted to
# engineering units using ul.to_eng_units().
eng_value = ul.to_eng_units(board_num, ai_range,
ctypes_array[data_index])
display_data.append('{:.3f}'.format(eng_value))
print(row_format.format(*display_data))
# Wait a while before adding more values to the display.
time.sleep(0.5)
status, curr_count, curr_index = ul.get_status(
board_num, FunctionType.AIFUNCTION)
# Stop the background operation (this is required even if the
# scan completes successfully)
ul.stop_background(board_num, FunctionType.AIFUNCTION)
print("Scan completed successfully.")
except ULError as e:
util.print_ul_error(e)
finally:
# Free the buffer in a finally block to prevent errors from causing
# a memory leak.
ul.win_buf_free(memhandle)
if use_device_detection:
ul.release_daq_device(board_num)
def start_scan(self):
self.low_chan = self.get_low_channel_num()
self.high_chan = self.get_high_channel_num()
self.num_chans = self.high_chan - self.low_chan + 1
if self.low_chan > self.high_chan:
messagebox.showerror(
"Error",
"Low Channel Number must be greater than or equal to High "
"Channel Number")
self.set_ui_idle_state()
return
rate = 100
points_per_channel = 1000
# Some hardware requires that the total_count is an integer multiple
# of the packet size. For this case, calculate a points_per_channel
# that is equal to or just above the points_per_channel selected
# which matches that requirement.
if self.ai_props.continuous_requires_packet_size_multiple:
packet_size = self.ai_props.packet_size
remainder = points_per_channel % packet_size
if remainder != 0:
points_per_channel += packet_size - remainder
total_count = points_per_channel * self.num_chans
range_ = self.ai_props.available_ranges[0]
scan_options = ScanOptions.BACKGROUND | ScanOptions.CONTINUOUS
# Allocate a buffer for the scan
if self.ai_props.resolution <= 16:
# Use the win_buf_alloc method for devices with a resolution <=
# 16
self.memhandle = ul.win_buf_alloc(total_count)
else:
# Use the win_buf_alloc_32 method for devices with a resolution
# > 16
self.memhandle = ul.win_buf_alloc_32(total_count)
if not self.memhandle:
messagebox.showerror("Error", "Failed to allocate memory")
self.set_ui_idle_state()
return
# Create the frames that will hold the data
self.recreate_data_frame()
try:
# Run the scan
ul.a_in_scan(self.board_num, self.low_chan, self.high_chan,
total_count, rate, range_, self.memhandle,
scan_options)
except ULError as e:
self.show_ul_error(e)
self.set_ui_idle_state()
return
# Convert the memhandle to a ctypes array
# Note: the ctypes array will no longer be valid after win_buf_free
# is called.
# A copy of the buffer can be created using win_buf_to_array
# or win_buf_to_array_32 before the memory is freed. The copy can
# be used at any time.
if self.ai_props.resolution <= 16:
# Use the memhandle_as_ctypes_array method for devices with a
# resolution <= 16
self.ctypes_array = self.memhandle_as_ctypes_array(self.memhandle)
else:
# Use the memhandle_as_ctypes_array_32 method for devices with a
# resolution > 16
self.ctypes_array = self.memhandle_as_ctypes_array_32(
self.memhandle)
# Start updating the displayed values
self.update_displayed_values(range_)
def run_example():
board_num = 0
rate = 100
points_per_channel = 10
if use_device_detection:
ul.ignore_instacal()
if not util.config_first_detected_device(board_num):
print("Could not find device.")
return
ai_props = AnalogInputProps(board_num)
if ai_props.num_ai_chans < 1:
util.print_unsupported_example(board_num)
return
low_chan = 0
high_chan = min(3, ai_props.num_ai_chans - 1)
num_chans = high_chan - low_chan + 1
total_count = points_per_channel * num_chans
ai_range = ai_props.available_ranges[0]
scan_options = ScanOptions.FOREGROUND
if ScanOptions.SCALEDATA in ai_props.supported_scan_options:
# If the hardware supports the SCALEDATA option, it is easiest to
# use it.
scan_options |= ScanOptions.SCALEDATA
memhandle = ul.scaled_win_buf_alloc(total_count)
# Convert the memhandle to a ctypes array.
# Use the memhandle_as_ctypes_array_scaled method for scaled
# buffers.
ctypes_array = util.memhandle_as_ctypes_array_scaled(memhandle)
elif ai_props.resolution <= 16:
# Use the win_buf_alloc method for devices with a resolution <= 16
memhandle = ul.win_buf_alloc(total_count)
# Convert the memhandle to a ctypes array.
# Use the memhandle_as_ctypes_array method for devices with a
# resolution <= 16.
ctypes_array = util.memhandle_as_ctypes_array(memhandle)
else:
# Use the win_buf_alloc_32 method for devices with a resolution > 16
memhandle = ul.win_buf_alloc_32(total_count)
# Convert the memhandle to a ctypes array.
# Use the memhandle_as_ctypes_array_32 method for devices with a
# resolution > 16
ctypes_array = util.memhandle_as_ctypes_array_32(memhandle)
# Note: the ctypes array will no longer be valid after win_buf_free is
# called.
# A copy of the buffer can be created using win_buf_to_array or
# win_buf_to_array_32 before the memory is freed. The copy can be used
# at any time.
# Check if the buffer was successfully allocated
if not memhandle:
print("Failed to allocate memory.")
return
try:
# Start the scan
ul.a_in_scan(board_num, low_chan, high_chan, total_count, rate,
ai_range, memhandle, scan_options)
print("Scan completed successfully. Data:")
# Create a format string that aligns the data in columns
row_format = "{:>5}" + "{:>10}" * num_chans
# Print the channel name headers
labels = []
labels.append("Index")
for ch_num in range(low_chan, high_chan + 1):
labels.append("CH" + str(ch_num))
print(row_format.format(*labels))
# Print the data
data_index = 0
for index in range(points_per_channel):
display_data = [index]
for _ in range(num_chans):
if ScanOptions.SCALEDATA in scan_options:
# If the SCALEDATA ScanOption was used, the values
# in the array are already in engineering units.
eng_value = ctypes_array[data_index]
else:
# If the SCALEDATA ScanOption was NOT used, the
# values in the array must be converted to
# engineering units using ul.to_eng_units().
eng_value = ul.to_eng_units(board_num, ai_range,
ctypes_array[data_index])
data_index += 1
display_data.append('{:.3f}'.format(eng_value))
# Print this row
print(row_format.format(*display_data))
except ULError as e:
util.print_ul_error(e)
finally:
# Free the buffer in a finally block to prevent errors from causing
# a memory leak.
ul.win_buf_free(memhandle)
if use_device_detection:
ul.release_daq_device(board_num)
def run_example():
# By default, the example detects and displays all available devices and
# selects the first device listed. Use the dev_id_list variable to filter
# detected devices by device ID (see UL documentation for device IDs).
# If use_device_detection is set to False, the board_num variable needs to
# match the desired board number configured with Instacal.
use_device_detection = True
dev_id_list = []
board_num = 0
rate = 100
points_per_channel = 10
memhandle = None
try:
if use_device_detection:
config_first_detected_device(board_num, dev_id_list)
daq_dev_info = DaqDeviceInfo(board_num)
if not daq_dev_info.supports_analog_input:
raise Exception('Error: The DAQ device does not support '
'analog input')
print('\nActive DAQ device: ',
daq_dev_info.product_name,
' (',
daq_dev_info.unique_id,
')\n',
sep='')
ai_info = daq_dev_info.get_ai_info()
low_chan = 0
high_chan = min(3, ai_info.num_chans - 1)
num_chans = high_chan - low_chan + 1
total_count = points_per_channel * num_chans
ai_range = ai_info.supported_ranges[0]
scan_options = ScanOptions.FOREGROUND
if ScanOptions.SCALEDATA in ai_info.supported_scan_options:
# If the hardware supports the SCALEDATA option, it is easiest to
# use it.
scan_options |= ScanOptions.SCALEDATA
memhandle = ul.scaled_win_buf_alloc(total_count)
# Convert the memhandle to a ctypes array.
# Use the memhandle_as_ctypes_array_scaled method for scaled
# buffers.
ctypes_array = cast(memhandle, POINTER(c_double))
elif ai_info.resolution <= 16:
# Use the win_buf_alloc method for devices with a resolution <= 16
memhandle = ul.win_buf_alloc(total_count)
# Convert the memhandle to a ctypes array.
# Use the memhandle_as_ctypes_array method for devices with a
# resolution <= 16.
ctypes_array = cast(memhandle, POINTER(c_ushort))
else:
# Use the win_buf_alloc_32 method for devices with a resolution > 16
memhandle = ul.win_buf_alloc_32(total_count)
# Convert the memhandle to a ctypes array.
# Use the memhandle_as_ctypes_array_32 method for devices with a
# resolution > 16
ctypes_array = cast(memhandle, POINTER(c_ulong))
# Note: the ctypes array will no longer be valid after win_buf_free is
# called.
# A copy of the buffer can be created using win_buf_to_array or
# win_buf_to_array_32 before the memory is freed. The copy can be used
# at any time.
# Check if the buffer was successfully allocated
if not memhandle:
raise Exception('Error: Failed to allocate memory')
# Start the scan
ul.a_in_scan(board_num, low_chan, high_chan, total_count, rate,
ai_range, memhandle, scan_options)
print('Scan completed successfully. Data:')
# Create a format string that aligns the data in columns
row_format = '{:>5}' + '{:>10}' * num_chans
# Print the channel name headers
labels = ['Index']
for ch_num in range(low_chan, high_chan + 1):
labels.append('CH' + str(ch_num))
print(row_format.format(*labels))
# Print the data
data_index = 0
for index in range(points_per_channel):
display_data = [index]
for _ in range(num_chans):
if ScanOptions.SCALEDATA in scan_options:
# If the SCALEDATA ScanOption was used, the values
# in the array are already in engineering units.
eng_value = ctypes_array[data_index]
else:
# If the SCALEDATA ScanOption was NOT used, the
# values in the array must be converted to
# engineering units using ul.to_eng_units().
eng_value = ul.to_eng_units(board_num, ai_range,
ctypes_array[data_index])
data_index += 1
display_data.append('{:.3f}'.format(eng_value))
# Print this row
print(row_format.format(*display_data))
except Exception as e:
print('\n', e)
finally:
if memhandle:
# Free the buffer in a finally block to prevent a memory leak.
ul.win_buf_free(memhandle)
if use_device_detection:
ul.release_daq_device(board_num)
def run():
DaqDeviceScan(master=tk.Tk()).mainloop()
board_num = 0
rate = 1000
points_per_channel = 30
if use_device_detection:
ul.ignore_instacal()
if not configDevice(board_num):
print("Gerät konnte nicht gefunden werden!")
return
ai_props = aiProps(board_num)
low_channel = 0
high_channel = min(7, ai_props.num_ai_chans - 1)
num_channels = high_channel - low_channel + 1
total_amount = points_per_channel * num_channels
ai_range = ai_props.available_ranges[0]
scan_opt = ScanOptions.FOREGROUND
if ScanOptions.SCALEDATA in ai_props.supported_scan_options:
scan_opt |= ScanOptions.SCALEDATA
memhandle = ul.scaled_win_buf_alloc(total_amount)
c_array = memhandle_as_ctypes_array_scaled(memhandle)
elif ai_props.resolution <= 16:
memhandle = ul.win_buf_alloc(total_amount)
c_array = memhandle_as_ctypes_array(memhandle)
else: memhandle = ul.win_buf_alloc_32(memhandle)
if not memhandle:
print("Speicher konnte nicht allokiert werden")
restart = False
try:
wr = csv.writer(open("test5.csv","w"),delimiter=";")
ul.a_in_scan(board_num, low_channel, high_channel, total_amount, rate, ai_range, memhandle, scan_opt)
print("Scan erfolgreich!")
print("Daten: ")
test = ul.a_in_32(board_num, 0, ai_range, scan_opt)
test = ul.to_eng_units_32(board_num, ai_range, test)
print("test value:")
print(test)
row_format = "{:>5}" + "{:>10}" * num_channels
labels = []
labels.append("Index")
for ch_num in range(low_channel, high_channel + 1):
labels.append("CH" + str(ch_num))
print(row_format.format(*labels))
data_index = 0
for index in range(points_per_channel):
display_data = [index]
for _ in range(num_channels):
if ScanOptions.SCALEDATA in scan_opt:
eng_value = c_array[data_index]
else:
eng_value = ul.to_eng_units(
board_num, ai_range, c_array[data_index])
data_index += 1
display_data.append('{:.3f}'.format(eng_value))
wr.writerow(display_data)
print(row_format.format(*display_data))
except ULError as e:
pass
finally:
ul.win_buf_free(memhandle)
if use_device_detection:
ul.release_daq_device(board_num)
