B&B Electronics PC Watchdog Timer Card ATXWDT Dokumentacja Pobierz pdf (Strona 23)

Intel

EP80579 Software Drivers for Embedded Applications on FreeBSD*

September 2009 GSG

Order Number: 320152-005US 23

Runtime Configuration—EP80579 Integrated Processor

To load the FreeBSD EDMA driver, execute the following command from the directory

where the compiled executable resides:

kldload ./dma.ko

To unload the FreeBSD EDMA driver execute the following command:

kldunload dma.ko

The kldstat command may be used to confirm if a module has been loaded or

unloaded:

kldstat | grep dma

The output of the kldstat command lists all modules loaded in the system. Look for an

entry titled “dma”.

5.2.3 FreeBSD Sample Codelet

A codelet is provided to demonstrate how a sample application interfaces with the

EDMA driver. This codelet is intended to run on an Intel

EP80579 Integrated Processor

with Intel

QuickAssist Technology Development Board with FreeBSD installed. The

EP80579 Embedded Software kernel should also be installed, but the codelet works

even if it is not. Run the codelet as follows:

1. Log in as root. Root privileges are required for some of the operations.

2. Open a terminal window, change directory to /EP805XX_release/Embedded/

codelet/EDMA and execute the following C-shell script. Do not move the script to

another location.

[root@localhost ˜]# ./install.csh

The script checks for the EDMA and client drivers, runs all of the makefiles in the

correct order, loads the client driver, and runs the application.

The application and client driver output can be viewed in the terminal window.

3. For information about the EDMA codelet, refer to the Readme document located at

/EP805XX_release/Embedded/codelet/EDMA.

5.3 WDT - Watchdog Timer

5.3.1 FreeBSD Compilation Instructions

All source files for the FreeBSD release of the Watchdog Timer (WDT) driver are located

in the following directory within the FreeBSD compatible EP80579 embedded software

drivers release:

/EP805XX_release/Embedded/src/WDT

Compilation of the FreeBSD WDT driver separately from the rest of the software

package is possible. Enter the /EP805XX_release/Embedded/src/WDT directory and

execute the following commands:

make clean

make

make install (this will install the driver for persistency)

The WDT driver compiles, is installed, and the resulting iwdt.ko file is placed in the

/EP805XX_release/Embedded/build directory.

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