Lanner LEC-2110 - Manual (Page 26)

26
Programming Watchdog Timer
Embedded and Industrial Computing
Appendix A
On Linux
Executing the commands through the Command Line:
1. wd_tst --swtsr (Set Watchdog Timeout State to Reset)
2. wd_tst --swt xxx (Set Watchdog Timer 1-255 seconds)
3. wd_tst[*] --start (Start Watchdog Timer)
4. wd_tst --stop (Stop Watchdog Timer)
The following procedures are required for running the
watchdog program on DOS, Linux and FreeBSD.
Note:
For DOS environment, use DJGPP as compiler 4.
and the makefile: Makefile.dos.
For Linux, support kernel versions are 2.4.x and 5.
2.6.x. Use the makefile:Makefile.linux.
For FreeBSD, support version is FreeBSD 8.0. 6.
Use the makefile: Makefile.
Build
To build program source code on Linux platform, use the
following steps as a guideline:
Copy the proper makefile from the Driver and Manual 1.
CD to your system
Set the access mode with these two parameters
2.
by editing the Makefile.linux directly: DIRECT_IO_
ACCESS= [0|1] (enter either 1 or 0) and LANNER_
DRIVER= [0|1] (enter either 1 or 0). 1 is for direct access
and no driver is needed. You will only need to execute
the program directly. However, when it equaled to 0,
driver installation is needed. Refer to the following
Install section for more details.
Type make to build source code:
3.
make Makefile (Note: omit the file extensions)
After compiled, the executable program (bpwd_tst) and
the driver (bpwd_drv.ko) will be in the bin subdirectory.
Install
The installation procedures depend on the access mode
that you have set by using the above mentioned method.
If you have set DIRECT_IO_ACCESS=1, driver installation is
not necessary. Proceed to the next section on executing
If you have set DIRECT_IO_ACCESS=0, Lanner bypass
driver needs to be installed. Install the driver and create
a node in the /dev directory as shown in the following
example:
For Linux:
Insert module and create node in /dev as below
example:
#insmod wd_drv.[k]o
#mknod /dev/wd_drv c 241 0
For FreeBSD:
Insert module as below example:
#kldload -v ./wd_drv.ko
Execute
# wd_tst --swtsb (Set Watchdog Timeout State to Bypass
function)
# wd_tst --swtsr (Set Watchdog Timeout State to Reset
function)
# wd_tst --swt xxx (Set Watchdog Timer 1-255 seconds)
# wd_tst[*] --start (Start Watchdog Timer)
# wd_tst --stop (Stop Watchdog Timer)
Note:
wd_tst --start will not be available if 1.
DIRECT_IO_ACCESS=1, use the command: “./
wd_tst --swt xxx” to start the watchdog timer
instead .
Watchdog timer can support two functions, 2.
- system rest or LAN bypass. However, only
one function can be activated at a time. You
should modify the code or switch it to the
desired state/function accordingly.
For more details, refer to the README file 3.
contained within the program.