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Diffstat (limited to 'docs/library/pyb.Timer.rst')
| -rw-r--r-- | docs/library/pyb.Timer.rst | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/docs/library/pyb.Timer.rst b/docs/library/pyb.Timer.rst index af28fb678..d2a299bd2 100644 --- a/docs/library/pyb.Timer.rst +++ b/docs/library/pyb.Timer.rst @@ -37,9 +37,13 @@ class Timer -- control internal timers tim.callback(lambda t: ...) # set callback for update interrupt (t=tim instance) tim.callback(None) # clear callback - *Note:* Timer 3 is reserved for internal use. Timer 5 controls - the servo driver, and Timer 6 is used for timed ADC/DAC reading/writing. - It is recommended to use the other timers in your programs. + *Note:* Timer(2) and Timer(3) are used for PWM to set the intensity of LED(3) + and LED(4) respectively. But these timers are only configured for PWM if + the intensity of the relevant LED is set to a value between 1 and 254. If + the intensity feature of the LEDs is not used then these timers are free for + general purpose use. Similarly, Timer(5) controls the servo driver, and + Timer(6) is used for timed ADC/DAC reading/writing. It is recommended to + use the other timers in your programs. *Note:* Memory can't be allocated during a callback (an interrupt) and so exceptions raised within a callback don't give much information. See @@ -56,7 +60,7 @@ Constructors Construct a new timer object of the given id. If additional arguments are given, then the timer is initialised by ``init(...)``. - ``id`` can be 1 to 14, excluding 3. + ``id`` can be 1 to 14. Methods ------- |