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Send notifications to ExtUI for M0/M1 (#13344)

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- Send notifications to ExtUI for M0/M1

- wait_for_user can be non-volatile (not changed by interrupt)
  C / C++ compilers don't optimize away reads of non-volatile variables when a function call is used between accesses, because *any* variable could be changed by the function call. Since `wait_for_user` can't be changed without a function call, it should be non-volatile so the compiler can optimize away cases where it is read more than once without an intervening function call.
This commit is contained in:
Tobias Frost
2019-03-09 21:13:50 +01:00
committed by Scott Lahteine
parent 00fc43144a
commit 60e82e3929
6 changed files with 25 additions and 4 deletions
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2
Marlin/src/Marlin.cpp
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@ -183,7 +183,7 @@ volatile bool wait_for_heatup = true;
// For M0/M1, this flag may be cleared (by M108) to exit the wait-for-user loop
#if HAS_RESUME_CONTINUE
volatile bool wait_for_user; // = false;
bool wait_for_user; // = false;
#endif
#if HAS_AUTO_REPORTING || ENABLED(HOST_KEEPALIVE_FEATURE)