WDTCTL = WDTPW | WDTHOLD;
时间: 2023-11-01 21:24:59 浏览: 102
MSP430 定时器B与看门狗定时器(1)
This line of code disables the watchdog timer on a Texas Instruments MSP430 microcontroller.
The watchdog timer is a hardware component that can reset the microcontroller if it is not periodically refreshed by the software. It is meant to provide a safety mechanism in case the software gets stuck in an infinite loop or encounters some other fault.
By default, the watchdog timer is enabled on the MSP430, but it can be disabled by setting the WDTCTL register to a specific value. The WDTPW (watchdog timer password) and WDTHOLD (watchdog timer hold) bits are combined using a bitwise OR operator to create the desired value.
The WDTPW bit is a password that must be set to write any changes to the WDTCTL register. The WDTHOLD bit disables the watchdog timer, preventing it from resetting the microcontroller.
Therefore, the line of code "WDTCTL = WDTPW | WDTHOLD;" sets the WDTCTL register to the correct value to disable the watchdog timer on the MSP430.
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