Kernel version: 2.6.28
Software platform: Ubuntu 11.04
Kernel version: 2.6.39
Cross compiler: arm-linux-gcc 3.4.1
Original work, please indicate the source when reprinting
1. Load the watchdog driver
insmod wdt.ko
wdt.ko is the driver file name. If no parameters are added and the dog is not fed, the interrupt function will be executed when the counter reaches 0 (set the state of the LED, then feed the dog, and reset the value of WTCNT)
Optional parameters
module_param(tmr_margin, int, 0);
module_param(tmr_atboot, int, 0);
module_param(nowayout, int, 0);
module_param(soft_noboot, int, 0);
module_param(debug, int, 0);
When soft_noboot is set to 0, if the dog is not fed, the development board will reset insmod wdt.ko soft_noboot = 0
For details of the driver, see: http://blog.csdn.net/yming0221/article/details/6595265
In this way, the watchdog device file is automatically generated under /dev/
Just enter the content into the file to start the watchdog
echo 1>/dev/watchdog
In this way, you can see the LED light on the development board flashing regularly, indicating that the transplantation is successful.
To stop the watchdog, execute
echo V > /dev/watchdog
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