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learn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:start [2019/06/11 19:59] – [3. Logic Analyzer User Interface Overview] Boris Leonovlearn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:start [2021/06/02 23:49] (current) – Arthur Brown
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-====== Using the Logic Analyzer====== +====== Using the Logic Analyzer (REDIRECT) ====== 
- +~~REDIRECT>test-and-measurement/guides/waveforms-logic-analyzer~~ 
-{{:reference:instrumentation:analog-discovery-studio:hardware-reference-manual:logic-analyzer.png?nolink&800}} +~~NOSEMANTIC~~ 
- +{{tag>redirect}}
-===== Introduction ===== +
-This guide explains the use of the //Logic// instrument in WaveForms. This instrument is used to capture and view digital signals on the Test & Measurement Device's digital input channels. +
----- +
-===== Prerequisites ===== +
-  * A Digilent Test & Measurement Device with Digital Inputs +
-  * A Computer with WaveForms Software Installed +
- +
----- +
- +
-==== 1. Opening the Logic Analyzer==== +
- +
-<WRAP group> +
-<WRAP column half> +
-=== 1.1 === +
-Plug in the Test & Measurement Device, then start WaveForms and make sure the device is connected. +
- +
-If no device is connected to the host computer when WaveForms launches, the **Device Manager** will be launched. Make sure that the device is plugged in and turned on, at which point it will appear in the Device Manager's device list (1). Click on the device in the list to select it, then click the Select button (2) to close the Device Manager. +
- +
-**Note:** //“DEMO” devices are also listed, which allow the user to use WaveForms and create projects without a physical device.// +
- +
-**Note:** //The Device Manager can be reopened by clicking on the “Connected Device” button in the bottom right corner of the screen (3), or by selecting “Device Manager” from the “Settings” menu at the top of the screen.// +
-</WRAP> +
-<WRAP column half> +
-{{ :learn:instrumentation:tutorials:analog-discovery-studio-oscilloscope:waveforms-device-manager.png?600 |}} +
-</WRAP> +
-</WRAP> +
-<WRAP group> +
-<WRAP column half> +
-=== 1.2 === +
-Once the Welcome page loads, in the instrument panel at the left side of the window, click on the **Logic** button to open the //Logic Analyzer// instrument. +
-</WRAP> +
-<WRAP column half> +
-{{learn:instrumentation:tutorials:waveforms-instrument-panel:waveforms-instrument-panel-logic.png?600}} +
-</WRAP> +
-</WRAP> +
-<WRAP group> +
-<WRAP column half> +
-=== 1.3 === +
-Once the //Logic Analyzer// instrument opens, the window contains the data plot (1) showing captured data, the configuration panel (2) to left of the plot, and the control toolbar (3) at the top of the window. +
-</WRAP> +
-<WRAP column half> +
-{{learn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:1.3.png?600}} +
-</WRAP> +
-</WRAP> +
- +
----- +
- +
-==== 2. Using the Logic Analyzer==== +
-//This section walks through setting up the //Logic Analyzer// to capture an incoming data signal// +
- +
-<WRAP group> +
-<WRAP column half> +
-=== 2.1 Software Setup === +
-On the left panel, select the "Click to Add channels" (1 in image at right) or the green plus button ({{:learn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:symbol_plus.png?nolink}}). The menu that pops up allows signals to be added as individual lines, a bus, a standard protocol, or a custom protocol. To add individual lines, select "Signal" (2) and use CTRL and/or SHIFT to select multiple lines. For now, select DIO 0 and click "Ok". +
- +
-To use the //Logic Analyzer//, some signals must be applied to the digital input/outputs used. This guide uses the //Pattern Generator// instrument to apply a signal to DIO 0. For a detailed tutorial on using the //Pattern Generator// instrument, please see the [[learn:instrumentation:tutorials:analog-discovery-studio-pattern-generator|]] guide. +
- +
-Return to WaveForms' Welcome page by clicking on its tab at the top left of the screen and select //Patterns//. Alternatively, press the green plus button next to "Welcome" in the tab to add the instrument (3). On the left panel, select the "Click to Add channels" button or the green plus button ({{:learn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:symbol_plus.png?nolink}}). From "Signal" select DIO 0 and click "Ok". Under the **Type** column, choose //Clock// and leave the other settings in their default state.  +
-</WRAP> +
-<WRAP column half> +
-{{learn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:2.1a.png?600}} +
-</WRAP> +
-</WRAP> +
-<WRAP group> +
-<WRAP column half> +
-=== 2.2 Capture Data  === +
-Click the //Pattern Generator's// Run button ({{:learn:instrumentation:tutorials:waveforms-buttons:waveforms-run.png?nolink}}) in the control bar (1 in the image to the right) to begin outputting the signal on digital input/output pin 0. +
- +
-Return to the //Logic Analyzer// instrument, then click the Run button (2). The signal being generated by the //Patterns// instruments will appear in the plot. +
- +
-Change the time scaling by selecting different value in **Base** (3), located in the top right of the instrument (see [[learn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:start#time_configuration|section 3.4]] for more on this). +
- +
-To save the captured data, select "File" (4) from the top of the window and choose either "Save Acquisition" (allows for WaveForms to reopen the instrument with the data preloaded) or "Export" (allows export of a .csv file or a screenshot). +
-</WRAP> +
-<WRAP column half> +
-{{learn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:2.2.png?600}} +
-</WRAP> +
-</WRAP> +
- +
----- +
-==== 3. Logic Analyzer User Interface Overview ==== +
-//This section walks through the wide variety of controls and features available in the //Logic Analyzer// instrument// +
- +
-<WRAP group> +
-<WRAP column half> +
-=== 3.1 Control Buttons === +
-The control bar near the top of the instrument window contains two buttons used to start/stop the capture of data. The Run button continues capturing data until it is stopped. The Single button will fill a buffer based around a pre-defined trigger (explained in following sections). The buffer size and position relative to the trigger are set by the **Position** and **Base** options (explained in [[learn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:start#time_configuration|section 3.4]]). +
-</WRAP> +
-<WRAP column half> +
-{{learn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:control_buttons.png}} +
-</WRAP> +
-</WRAP> +
-<WRAP group> +
-<WRAP column half> +
-=== 3.2 Buffer Configuration=== +
-To the right of the control buttons are various options for filling the buffer and selecting which buffer to look at.  +
-The **Mode** drop-down changes between the  five acquisition modes: //Repeated//, //Screen//, //Shift//, //Record//, and //Sync//.  +
- +
-//Record// mode repeatedly fills buffers with data and displays them on the screen as they're filled until the Stop button is pressed. +
- +
-//Screen// and //Shift// modes continuously add new data to the screen as it streams in instead of showing full buffers as in //Record//.  +
-//Screen// will fill the screen from left to right and then add new data on the left, overwriting the previous data set.  +
-//Shift// will show new data as it comes in from the right, in effect scrolling the data from right to left. +
- +
-//Record// allows for large amounts of data to be captured at a lower sample rate. This can be used for recording data from a sensor that needs to be monitored for several minutes or hours. +
- +
-//Sync// offers the ability to use an external clock to control when the //Logic Analyzer// records samples. Useful with communication protocols such as SPI, I2C, and UART. +
- +
-The **Buffer** option allows for selection of buffers, as each acquisition fills a new one (except in //Repeat// mode, where buffers are sequentially filled). The green plus button ({{learn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:symbol_plus.png?nolink}}) creates tabs for each buffer for easy switching. +
-</WRAP> +
-<WRAP column half> +
-{{learn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:buffer_control.png}} +
-</WRAP> +
-</WRAP> +
-<WRAP group> +
-<WRAP column half> +
-=== 3.3 Trigger Configuration=== +
-The **Trigger** drop-down allows for selection of the trigger type: //None//, //Auto//, and //Normal//. +
- +
-//None// starts the acquisition immediately after Run is clicked. +
- +
-//Auto// starts the acquisition either on the trigger event, or approximately 2 seconds after Run is pressed if the trigger event doesn't occur. +
-</WRAP> +
-<WRAP column half> +
-</WRAP> +
-</WRAP> +
-<WRAP group> +
-<WRAP column half> +
-//Normal// starts the acquisition only on the trigger event. +
- +
-The **Source** drop-down allows the user to trigger the oscilloscope based on events in other instruments. /*For more information, please see the **Cross-Triggering Guide** FIXME link.*/ +
- +
-The **Inputs** drop-down (pictured on the right) is available for Digilent's **Digital Discovery** to specify which DIO pins to use at a specified frequency. +
- +
-</WRAP> +
-<WRAP column half> +
-{{learn:instrumentation:tutorials:analog-discovery-studio-pattern-generator:dd_sample_rate.png}} +
-</WRAP> +
-</WRAP> +
-<WRAP group> +
-<WRAP column half> +
-The three buttons labeled "Simple", "Pulse", and "Protocol" allow for customization of trigger conditions. +
-</WRAP> +
-<WRAP column half> +
-</WRAP> +
-</WRAP> +
-<WRAP group> +
-<WRAP column half> +
-//Simple// is used in conjunction with the Trigger column (labeled T in the //Logic Analyzer// instrument, see image at right). Each channel can be set to trigger on various events: Ignore ({{learn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:x.png?nolink}}), Low ({{learn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:0.png?nolink}}), High ({{learn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:1.png?nolink}}), Rise ({{learn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:rising.png?nolink}}), Fall ({{learn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:falling.png?nolink}}), and Edge ({{learn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:edge.png?nolink}}). +
- +
-//Pulse// opens a menu to configure a trigger on a pulse that is either shorter than a specified time (**Glitch**), longer than a specified time (**Timeout**), the exact length of specified time (**Length**), or after a specified number of edges (**Counter**).  +
- +
-//Protocol// is used in conjunction with a Bus configuration or one of the standard protocols (SPI, I2C, UART, CAN, I2S, and 1Wire) available when adding channels to the //Logic Analyzer// instrument. A protocol-specific menu will pop up to configure the trigger. +
-</WRAP> +
-<WRAP column half> +
-{{:learn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:trig_config.png}} +
-</WRAP> +
-</WRAP> +
-<WRAP group> +
-<WRAP column half> +
-=== 3.4 Time Configuration=== +
-By default, the Time group in the Configuration panel contains the **Position** and **Base** fields.  +
- +
-The **Position** field centers the plot on the selected time, measured from the trigger. This can be used to view data captured before and after the trigger event.  +
- +
-The **Base** field configures the scale used for the horizontal axis of the plot.  +
- +
-Using these two settings can be thought of as “panning” and “zooming” the plot. +
-</WRAP> +
-<WRAP column half> +
-</WRAP> +
-</WRAP> +
-<WRAP group> +
-<WRAP column half> +
-The gear button ({{:learn:instrumentation:tutorials:waveforms-buttons:waveforms-gear.png?nolink}}) opens a menu (pictured on the right) that can be used to modify the Position and Base field units, and the acquisition behavior.  +
- +
-//Position as a division// toggles the position units between seconds and divisions. +
- +
-**Range Mode** drop-down has the options //Full//, //Division//, and //PlusMinus//. +
- +
-//Full// changes the units in Base to the full length of the buffer in seconds. +
- +
-//Division// changes the unis in Base to the number of seconds per division (note there are always 10 divisions in the //Logic Analyzer// instrument). +
- +
-//PlusMinus// changes the units in Base to the number of seconds before and after the Position point.  +
- +
-The **Clock** drop-down changes between the //Internal// and //External// clocks. This option is only available for certain pieces of hardware, and therefore may be grayed out. +
- +
-//Noise// toggles the option to acquire noise samples in half of the buffer. +
- +
-The **Edge** drop-down allows for selection of the rising, falling, or edge for the external or internal trigger signals. +
- +
-The **Buffers** drop-down selects the number of buffers to store in the PC. This changes the maximum value in **Buffer** in section 3.1. +
- +
-The "Clear buffers" button ({{learn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:symbol_clear.png?nolink}}) clears all the PC buffers. +
- +
-//Draw while recording// toggles drawing while in //Record// and //Sync// modes, somewhat resembling //Scan// and //Screen// behavior while collecting data over a long period +
- +
-The **Update** drop-down sets the update rate of the //Logic Analyzer// instrument display. +
- +
- +
-</WRAP> +
-<WRAP column half> +
-{{learn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:time_config.png}} +
-</WRAP> +
-</WRAP> +
-<WRAP group> +
-<WRAP column half> +
-</WRAP> +
-</WRAP> +
-<WRAP group> +
-<WRAP column half> +
-=== 3.5 Additional Configuration Options === +
-Pressing the green arrow ({{learn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:arrow.png}}) below the gear icon will display options for setting the number of samples to collect and sample rate. Changing these options overrides the Base selections +
- +
-**Samples** selects the number of data points to collect. +
- +
-**Rate** selects the sampling rate. Together with the values selected in the Samples drop-down this will determine the Base value. +
-</WRAP> +
-<WRAP column half> +
-{{learn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:addtnl_config.png}} +
-</WRAP> +
-</WRAP> +
-<WRAP group> +
-<WRAP column half> +
-=== 3.6 Adding Protocol Channels === +
-Protocol channels can be used to aid interpretation of digital communication protocol transactions. For example, SPI, UART, I2C, and other protocol channels can be used to represent data words in a variety of different formats (including binary, decimal, hexadecimal, ASCII, and many others). Data words are aligned with the appropriate flags (start, select, acknowledge, etc), based on user-defined settings. +
- +
-In order to add a protocol channel to the plot, follow the steps in [[#software_setup|Section 2.1]] of this guide and select the appropriate protocol from the list. This will cause a menu with settings specific to that protocol to pop up, allowing for selection of DIO channels for each signal line. Protocol-specific options such as endianness, polarity, bit order, etc can also be defined. +
- +
-After being added to the plot, protocol channel settings can be modified by clicking the Properties icon ({{learn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:symbol_properties.png?nolink}}) for that channel (1 in the image at right). +
- +
-The Protocol and Bus modes will display the data seen on each individual line, as well as the overall value of that combination of channels. These values are marked by 2's in the image at right. +
-</WRAP> +
-<WRAP column half> +
-{{learn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:protocol_channels.png}} +
-</WRAP> +
-</WRAP> +
-<WRAP group> +
-<WRAP column half> +
-=== 3.7 View Options === +
-The **View** menu is located at the top of the //Logic Analyzer// instrument window, right above Run. Selecting any of the views in that menu will open a tabbed window on the right side of the instrument window. The available views are //Data//, //Events//, //Logging//, //Measurements//, //Cursors//, and //Notes// (see image at right). +
-</WRAP> +
-<WRAP column half> +
- +
-</WRAP> +
-</WRAP> +
-<WRAP group> +
-<WRAP column half> +
-//Data// displays a table of all acquired samples. If using the Bus or a protocol, only the overall values (as discussed in 3.5) are displayed. +
- +
-//Events// only displays data when it changes. This provides a more compact view than Data, but only displays one channel at a time. Channels can be selected in the drop-down presented at the top of the Events view, as well as filtered by various methods. +
- +
-//Measurements// shows the list of selected measurements. These available measurements are cycles, frequency, period, positive/negative duty cycles, and positive/negative pulse widths. +
- +
-//Logging// uses scripts to automate the capture of multiple data sequences, and save the captured data to file/s. +
- +
-//Cursors// are used to display time reference markers with respect to the capture-triggering event. The drop-down menus contain adjustment controls for the position, reference cursor, and delta x value. +
- +
-//Notes// allows for adding of notes and descriptions into projects. +
-</WRAP> +
-<WRAP column half> +
-{{learn:instrumentation:tutorials:analog-discovery-studio-logic-analyzer:view_options.png}} +
-</WRAP> +
-</WRAP> +
----- +
-==== Next Steps ==== +
- +
-/* +
-If voltage values seen in the //Voltmeter// are significantly different from the expected voltage output of the //Supplies//, please calibrate the device by following the **Calibration Guide**. FIXME link +
-*/ +
- +
-For more guides on how to use the Digilent Test & Measurement Device, return to the device's Resource Center, linked from [[reference:instrumentation:start|Instrumentation]] page of this wiki. +
- +
-For more information on WaveForms visit the [[reference:software:waveforms:waveforms-3:reference-manual|WaveForms Reference Manual]].  +
- +
-For technical support, please visit the [[https://forum.digilentinc.com/forum/8-scopes-instruments/|Scopes and Instruments]] section of the Digilent Forums. +
- +
-{{tag>analog-discovery-studio tutorial}}+