pic18f调试-重置WDT问题

你的问题是WDT导致了一个不象陷阱或ISR的重置。虽然您可以检测到重置是由WDT引起的，但是您没有调用堆栈或类似程序来帮助您确定发生WDT重置时MCU的状态。您可能能够创建用于保持代码当前状态的持久全局变量（或两个）。比如-在函数“X”中，在ISR“y”中，“在主循环中空闲”等。通过使变量持久化，它不会被运行时代码重置（假设您正在用C编程），并且在WDT重置的“main”的开始有一个测试权限，并使用它来设置断点，可以看到这些持久变量的状态，并开始了解发生了什么。不是100%有效，但是它可以给你一些想法。苏珊



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    The issue you have is that the WDT causes a reset which is not like a trap or ISR. While you can detect the fact that the reset was caused by the WDT, you don't have a call stack or similar to help you determine the state of the MCU when the WDT reset occurred.
You might be able to create a persistent global variable (or two) that you use to keep the current state of your code. Something like - In function 'X', In ISR 'y', 'Idling in the main loop' etc.
By making the variable persistent, it will not be reset by the runtime code (assuming you are programming in C) and by having a test right at the start of the 'main' for the WDT reset and using that to set a breakpoint, you can see the state of those persistent variables and start to get an idea of what happened.
Not 100% effective but it can give you ideas.
Susan

谢谢，真的很有帮助！同样发现问题：当等待设置TMRxIF标志时，它挂起，但是由于另一个问题，计时器可能被意外地禁用。这发生在中断发生时，直接在主循环设置某个内存地址之后。主循环要做的下一件事是禁用中断，但是在此之前，isr有机会弄乱刚刚设置的地址，最终导致对T2CON寄存器（可能还有其他寄存器）的不希望的写入！…



      以下为原文

    Thanks, that's helpful indeed! Found the issue too: it hangs when waiting on a TMRxIF flag to be set, but due to another issue said timer can be unintendedly disabled. That happened when my interrupt occurs, directly after the main loop sets up a certain memory address. The very next thing the main loop does is disable interrupts, but before that the isr has a chance to mess up the address that was just set up, ultimately causing an unwanted write to the T2CON register (and probably others!)...

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