Hello everyone,
I’m currently working on the analysis of I2C signals, I’m trying to check if the correct address for the slave is being send in the I2C data frame. For now, I’m using the demo/simulation device for Logic Pro 16.
I see this is possible by directly using the GUI(Address is visible):
This and it has to be automated, in order to do so, with little modification for selecting the I2C analyzer, I’ve modified the provided startup example in the documentation main page: Getting Started — Saleae 1.0.6 documentation
With small modifications it ends up like this:
from saleae import automation
import os
import os.path
from datetime import datetime
# Connect to the running Logic 2 Application on port `10430`.
# Alternatively you can use automation.Manager.launch() to launch a new Logic 2 process - see
# the API documentation for more details.
# Using the `with` statement will automatically call manager.close() when exiting the scope. If you
# want to use `automation.Manager` outside of a `with` block, you will need to call `manager.close()` manually.
with automation.Manager.connect(port=10430) as manager:
# Configure the capturing device to record on digital channels 0, 1, 2, and 3,
# with a sampling rate of 10 MSa/s, and a logic level of 3.3V.
# The settings chosen here will depend on your device's capabilities and what
# you can configure in the Logic 2 UI.
device_configuration = automation.LogicDeviceConfiguration(
enabled_digital_channels=[0, 1],
digital_sample_rate=10_000_000,
digital_threshold_volts=3.3,
)
# Record 5 seconds of data before stopping the capture
capture_configuration = automation.CaptureConfiguration(
capture_mode=automation.TimedCaptureMode(duration_seconds=30.0)
)
# Start a capture - the capture will be automatically closed when leaving the `with` block
# Note: The serial number 'F4241' is for the Logic Pro 16 demo device.
# To use a real device, you can:
# 1. Omit the `device_id` argument. Logic 2 will choose the first real (non-simulated) device.
# 2. Use the serial number for your device. See the "Finding the Serial Number
# of a Device" section for information on finding your device's serial number.
with manager.start_capture(
device_id='F4241',
device_configuration=device_configuration,
capture_configuration=capture_configuration) as capture:
# Wait until the capture has finished
# This will take about 5 seconds because we are using a timed capture mode
capture.wait()
# Add an analyzer to the capture
# Note: The simulator output is not actual SPI data
spi_analyzer = capture.add_analyzer('I2C', label=f'Test Analyzer', settings={
'SDA': 0,
'SCL': 1,
})
# Store output in a timestamped directory
output_dir = os.path.join(os.getcwd(), f'output-{datetime.now().strftime("%Y-%m-%d_%H-%M-%S")}')
os.makedirs(output_dir)
# Export analyzer data to a CSV file
analyzer_export_filepath = os.path.join(output_dir, 'i2c_export.csv')
capture.export_data_table(
filepath=analyzer_export_filepath,
analyzers=[spi_analyzer]
)
# Export raw digital data to a CSV file
capture.export_raw_data_csv(directory=output_dir, digital_channels=[0, 1])
# Finally, save the capture to a file
capture_filepath = os.path.join(output_dir, 'example_capture.sal')
capture.save_capture(filepath=capture_filepath)
However, while executing, I can see that in the GUI annotations from logic analyzer are not shown:
After execution, the saved CSV data table does not correctly show the fields as it is done in the GUI:
Saved data table:
Shown in GUI:
am I doing something wrong?, why the fields for “ack”, “address”, “read” and “data” are not shown in the CSV file when using the export_data_table method?