Change printf behavior using a debugger present sentinel. #443
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2. Make the default behavior on hard fault to wait forever, and then print the error. 3. Add DidDebuggerAttach(). 4. Increase printf timeout, since it won't trigger if a debugger is not attached.
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1. Printf will wait up to 120ms at boot. 2. If printf has timed out, it will immediately continue. 3. If a debugger is reattached, it will keep printing. 4. If a debugger is attached, it will wait up to 120ms. Then continue at full speed.
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For printf: