Introduction
USB Logic Analyzer System
Setting Up - Installation
Setting Up - Test Probe Connections
Sample Capture Session
Software Menus
More Help
The USBee is a complete digital test bench in one compact and easy to use pod. Combined with powerful Windows® software, the USBee performs the following functions:
· Data Logger
· Remote Controller
· Logic Analyzer
· Signal/Pattern Generator
· I2C Controller
· Async Serial Controller
· Frequency Counter
· And many more to come&ldots;
This manual details the USBee Logic Analyzer.
The USBee Logic Analyzer System consists of the USBee pod connected to your Windows® 98 PC through the USB cable, and to your digital circuit using the multicolored test leads and clips. Once connected and installed, the USBee Logic Analyzer can provide the following functions:
· Capture up to 8 digital signals
· Real time display of current signal state when not capturing
· Trigger on any state of any signal, or a combination of multiple signals.
· Up to 3MHz sample rate per sample
· View over 6000 samples
· Display logged samples in List, Waveform, and D to A modes
· 2 measurement cursors show time and state
· Search for signal pattern
· Print current screen or captured data
· Easy setup and use through Windows® 98 interface
1. Download the Logic Analyzer Software for FREE from here..
2. Unzip the file into a new directory. Click Here if you need WINZIP.
2. Choose "Start|Run" from the Windows® 98 Start Menu
3. Press Browse and select the file "SETUP.EXE" in the new unzipped directory
4. Click OK
5. Follow the instructions on the screen to install the rest of the USBee Logic Analyzer software on your hard drive.
6. Now, plug the USBee cable into a free USB port on your computer.
7. You should see a dialog box indicating that it found new hardware and is installing the software for it. Please wait while this finishes.
8. The Logic Analyzer Software is now installed.
Setting Up - Test Probe connections
The following table shows the use of the 12 USBee test probes while using the Logic Analyzer Software.
|
Pod Signal Name |
Lead Color |
Data Logger Function |
Where to connect |
|
0 |
BLACK |
Input Signal 0 |
To a test signal |
|
1 |
BROWN |
Input Signal 1 |
To a test signal |
|
2 |
RED |
Input Signal 2 |
To a test signal |
|
3 |
ORANGE |
Input Signal 3 |
To a test signal |
|
4 |
YELLOW |
Input Signal 4 |
To a test signal |
|
5 |
GREEN |
Input Signal 5 |
To a test signal |
|
6 |
BLUE |
Input Signal 6 |
To a test signal |
|
7 |
PURPLE |
Input Signal 7 |
To a test signal |
|
CLK |
GRAY |
OUTPUT ONLY: provides the sample clock |
You may use this in your circuit. |
|
+5V |
RED |
+5V power supply from USB cable (up to 300mA) |
To your circuits +5V supply line if you need the USBee to supply +5V (do NOT connect if you already have +5V on your board) |
|
+3.3V |
WHITE |
+3.3V regulated power supply (up to 300mA) |
To your circuits +3.3V supply line if you need the USBee to supply +3.3V (do NOT connect if you already have +3.3V on your board) |
|
GND |
BLACK |
Pod and power supply ground |
To you circuit ground |
The following is a step by step description of a sample logging session. Follow along to get a quick understanding of the Logic Analyzer software.
1. Now choose "Start|Programs|USBee Digital Workbench|USBee Logic Analyzer" to start the logic analyzer program.
2. You will see the following screen
3. Notice the 8 signal lines that include the bit number (0-7), the Signal Name, and the current signal level of each signal lead. Touch one signal lead (Bit 0 BLACK) to the GND lead (BLACK) and watch the Now level go to 0. Disconnect it and you will see the Now level go back to 1. This is due to the internal pull-up resistor on Bit 0.
4. Let's start a capture session. Press the "Start Capture" button and you will see the following menu:
5. Click on any of the colored labels "signal name" to edit the signal names to your match the names of the signals you are connecting the corresponding leads to.
6. Select the "Sample Interval". This can be from 333ns (3MHz) to 100us (10kHz). For this example, choose 333ns.
7. Press "Start Capture" and you will see the following screen.
8. The USBee pod is now waiting for the signals to match the trigger specification.
9. To interrupt the capture before the trigger occurs, press the "Terminate Capture" button..
11. Once the trigger event occurs, you will see the following screen that shows the captured data in the List View.
12. In the Menu at the top of the window, select "View|Waveform". You will then be switched to Waveform View that allows you to see each signal as a digital wave. You can use the scroll bars and zoom in and out as in the following picture.
13. In the Waveform Window, click the Left button to drop the X Cursor and click the Right button to drop the O Cursor. Notice at the top of the screen the values of the signals and sample times at each cursor and between cursors.
14. In the Menu at the top of the window, select "View|D to A". You will then be switched to D to A View that allows you to see all 8 signals represented as an 8 bit value which is then plotted as a single signal. You can use the scroll bars and zoom in and out as in the following picture
15. Finally, from the menu select "File|Print Current Window". This will send the current Logic Analyzer window to your default printer exactly as it appears on your screen.
File - New Capture - Starts a new logic analyzer capture. Old data is lost unless it is saved to a file.
File - Open Capture File - Prompts for a filename of an existing capture file. Then loads and displays the data
File - Save As - Prompts for a new filename and saves the data to the file including the labels of the signal names
File - Print Current Window - Prints the current window to the default printer. To change printers, use the Windows® Printer Settings
File - Print Capture Data - Prints all or part of the captured data in a listing format
File - Exit - Exits the program
View - List View - Changes the view mode to the List mode
View - Waveform View - Changes the view mode to the Waveform mode
View - D to A view - Changes the view mode to the D to A mode
View - Search for Pattern - Searches the captured data for a pattern and places the found data at the cursor
View - Color Waveforms - Colors the waveforms and list data for easier reading
View - Black and White Waveforms - Changes data to black and white (for printing on some printers)
Data Capture - Start Capture - Starts a new capture session. Old data is lost unless saved to a file
Data Capture - Stop Capture - Stops the current capture in progress before trigger has occured
Help - Display the Help text
You can find more information at www.usbee.com including Frequently Asked Questions (FAQ). If you can not find your answers on the web site, you can contact CWAV technical support at support@usbee.com. Please provide a detailed description of your problem and steps needed to reproduce the problem and our support staff will promptly suggest solutions.
-
8 Digital Input Signals
-
Output sample clock (CLK)
-
Vil = 0.6V Vih = 1.4V
-
Variable sample rates in discrete steps from 333ns to 100us per sample. Sample Rate is +/- 100ppm.
-
Logic Analyzer capture capability is up to 6144 samples.
-
+5V Output Voltage depends on your PC. Typically this level is +5V +/- 5% but can vary if there are many USB devices connected to the USB bus.
-
+5V Max Current: 300mA
-
+3.3V Output Voltage: +3.3V +/- 1%
-
+3.3V Max Current: 300mA
Copyright(c) 2003 CWAV. All rights reserved.
support@usbee.com