Echo windows driver download

The following instructions show you how to install and test the sample driver. Here's the general syntax for the devcon tool that you will use to install the driver:.

The INF file required for installing this driver is echo. The inf file contains the hardware ID for installing the echo. Navigate to your driver package folder, and enter the following command:. Select Install this driver anyway to proceed. If you have any issues with the installation, check the following file for more information. On the target computer, in a Command Prompt window, enter devmgmt open Device Manager. In Device Manager, on the View menu, choose Devices by type.

Type echoapp to start the test echo app to confirm that the driver is functional. In Section 5, you will set the symbol path and use kernel debugger commands to display information about the KMDF echo sample driver.

If you closed the debugger, open it again using the following command in the administrator command prompt window. To set the symbols path to the Microsoft symbol server in the WinDbg environment, use the. To add your local symbol location to use your local symbols, add the path using. Note The. In some cases, this command also reloads or unloads the module itself.

Note You must load the proper symbols to use advanced functionality that WinDbg provides. If you do not have symbols properly configured, you will receive messages indicating that symbols are not available when you attempt to use functionality that is dependent on symbols. There are a number of approaches that can be used to work with symbols. In many situations, you can configure the PC to access symbols from a symbol server that Microsoft provides when they are needed.

This walkthrough assumes that this approach will be used. If the symbols in your environment are in a different location, modify the steps to use that location.

For additional information, see Symbol path for Windows debugger. To perform source debugging, you must build a checked debug version of your binaries. The compiler will create symbol files. These symbol files will show the debugger how the binary instructions correspond to the source lines. The actual source files themselves must also be accessible to the debugger. The symbol files do not contain the text of the source code.

For debugging, it is best if the linker does not optimize your code. Source debugging and access to local variables are more difficult, and sometimes nearly impossible, if the code has been optimized.

If you are having problems viewing local variables or source lines, set the following build options:. Type the following in the command area of the debugger to display information about the echo driver :. For information, see lm. For information, see x Examine Symbols. Your output should be similar to the text shown below. Type the following to change the default debug bit mask so that all debug messages from the target system will be displayed in the debugger.

Set the mask to 0x if you would like to reduce the amount of information that is displayed. In Section 6, you will display information about the echo sample device driver and where it lives in the Plug and Play device tree. Information about the device driver in the Plug and Play device tree can be useful for troubleshooting.

For example, if a device driver is not resident in the device tree, there may an issue with the installation of the device driver.

For more information about the device node debug extension, see! To see all the device nodes in the Plug and Play device tree, enter the! The echo device driver should be loaded. Use the! The output displayed in the previous command includes the PDO associated with the running instance of our driver, in this example it is 0xffffeb71a Enter the!

Use the PDO address that! The output displayed in the! The output shows that we have a fairly simple device driver stack. The echo driver is a child of the PnPManager node. The PnPManager is a root node. Note For more information about more complex driver stacks, see Driver stacks and Device nodes and device stacks.

To be able to step through code and check the values of variables in real time, we need to enable breakpoints and set a path to the source code. Breakpoints are used to stop code execution at a particular line of code. You can then step forward in the code from that point, to debug that specific section of code.

Sets a breakpoint that is unresolved when the module is unloaded and re-enables when the module reloads. Sets a breakpoint for a symbol. We will use the x command to examine the symbols associated with the echo driver to determine the function name to use for the breakpoint. Alternatively, we could review the source code to locate the desired function name for our breakpoint. Set the breakpoint with the bm command using the name of the driver, followed by the function name for example AddDevice where you want to set the breakpoint, separated by an exclamation mark.

We will use AddDevice to watch the driver being loaded. For more information, see Conditional breakpoints in WinDbg and other Windows debuggers.

List the current breakpoints to confirm that the breakpoint was set by typing the bl command. The "e" in the output shown above indicates that the breakpoint number 1 is enabled to fire.

Restart code execution on the target system by typing the go command g. In Windows, open Device Manager using the icon or by entering mmc devmgmt. In Device Manager, expand the Samples node. When the driver is enabled, the AddDevice debug breakpoint should fire, and the execution of the driver code on the target system should halt.

When the breakpoint is hit, the execution should be stopped at the start of the AddDevice routine. The debug command output will display "Breakpoint 1 hit". Step through the code line-by-line by typing the p command or pressing F10 until you reach the following end of the AddDevice routine.

In the next section, we will examine the state of the variables after the DeviceAdd code has executed. Note that the breakpoint dialog box only works with existing breakpoints. New breakpoints must be set from the command line. You can also set breakpoints that fire when a memory location is accessed. Between hitting the site won t allow us. Is there a setting in Sonar that I am missing?

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