WDTCTL = WDTPW | WDTHOLD;
时间: 2023-11-01 17:48:02 浏览: 34
This line of code disables the watchdog timer (WDT) on a Texas Instruments MSP430 microcontroller.
The WDT is a feature that is used to prevent the microcontroller from getting stuck in an infinite loop or other malfunction. It works by resetting the microcontroller if it does not receive a signal from the program within a certain amount of time.
However, in some cases, such as during the development and testing stages of a program, it may be necessary to disable the WDT in order to prevent it from interfering with the program execution.
The line of code above achieves this by using two predefined constants, WDTPW and WDTHOLD, which are combined using the bitwise OR operator (|).
WDTPW is a password that is required to modify the WDT settings, while WDTHOLD is a flag that disables the WDT. By combining these two constants using the OR operator, the program gains access to the WDT settings and then sets the WDTHOLD flag, effectively disabling the WDT.
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