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Diffstat (limited to 'docs/library/micropython.rst')
| -rw-r--r-- | docs/library/micropython.rst | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/docs/library/micropython.rst b/docs/library/micropython.rst index c13a7391bb..d1f923e31f 100644 --- a/docs/library/micropython.rst +++ b/docs/library/micropython.rst @@ -112,5 +112,14 @@ Functions the heap may be locked) and scheduling a function to call later will lift those restrictions. - There is a finite stack to hold the scheduled functions and `schedule` + Note: If `schedule()` is called from a preempting IRQ, when memory + allocation is not allowed and the callback to be passed to `schedule()` is + a bound method, passing this directly will fail. This is because creating a + reference to a bound method causes memory allocation. A solution is to + create a reference to the method in the class constructor and to pass that + reference to `schedule()`. This is discussed in detail here + :ref:`reference documentation <isr_rules>` under "Creation of Python + objects". + + There is a finite stack to hold the scheduled functions and `schedule()` will raise a `RuntimeError` if the stack is full. |