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Diffstat (limited to 'docs/library/pyb.Timer.rst')
| -rw-r--r-- | docs/library/pyb.Timer.rst | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/docs/library/pyb.Timer.rst b/docs/library/pyb.Timer.rst index c644e38d7..0e9e49c0e 100644 --- a/docs/library/pyb.Timer.rst +++ b/docs/library/pyb.Timer.rst @@ -62,7 +62,7 @@ Constructors Methods ------- -.. method:: Timer.init(*, freq, prescaler, period, mode=Timer.UP, div=1, callback=None, deadtime=0, brk=Timer.BRK_OFF) +.. method:: Timer.init(*, freq, prescaler, period, mode=Timer.UP, div=1, callback=None, deadtime=0, brk=Timer.BRK_OFF, hard=True) Initialise the timer. Initialisation must be either by frequency (in Hz) or by prescaler and period:: @@ -115,6 +115,18 @@ Methods ``mode=Pin.ALT, alt=Pin.AFn_TIMx``. The pin's GPIO input features are available in alt mode - ``pull=`` , ``value()`` and ``irq()``. + - ``hard`` can be one of: + + - ``True`` - The callback will be executed in hard interrupt + context, which minimises delay and jitter but is subject to the + limitations described in :ref:`isr_rules` including being unable + to allocate on the heap. + - ``False`` - The callback will be scheduled as a soft interrupt, + allowing it to allocate but possibly also introducing + garbage-collection delays and jitter. + + The default value of this option is True. + You must either specify freq or both of period and prescaler. .. method:: Timer.deinit() |