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Note behavior in documentation

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Thea Flowers 2019-10-25 10:56:41 -07:00
parent 4b742f88d9
commit 6782948751
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1 changed files with 11 additions and 0 deletions
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11
shared-bindings/pulseio/PWMOut.c
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@ -162,6 +162,11 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pulseio_pwmout___exit___obj, 4, 4, pu
//| 16 bit value that dictates how much of one cycle is high (1) versus low //| 16 bit value that dictates how much of one cycle is high (1) versus low
//| (0). 0xffff will always be high, 0 will always be low and 0x7fff will //| (0). 0xffff will always be high, 0 will always be low and 0x7fff will
//| be half high and then half low. //| be half high and then half low.
//|
//| Depending on how PWM is implemented on a specific board, the internal
//| representation for duty cycle might have less than 16 bits of resolution.
//| Reading this property will return the value from the internal representation,
//| so it may differ from the value set.
STATIC mp_obj_t pulseio_pwmout_obj_get_duty_cycle(mp_obj_t self_in) { STATIC mp_obj_t pulseio_pwmout_obj_get_duty_cycle(mp_obj_t self_in) {
pulseio_pwmout_obj_t *self = MP_OBJ_TO_PTR(self_in); pulseio_pwmout_obj_t *self = MP_OBJ_TO_PTR(self_in);
check_for_deinit(self); check_for_deinit(self);
@ -193,6 +198,12 @@ const mp_obj_property_t pulseio_pwmout_duty_cycle_obj = {
//| 32 bit value that dictates the PWM frequency in Hertz (cycles per //| 32 bit value that dictates the PWM frequency in Hertz (cycles per
//| second). Only writeable when constructed with ``variable_frequency=True``. //| second). Only writeable when constructed with ``variable_frequency=True``.
//| //|
//| Depending on how PWM is implemented on a specific board, the internal value
//| for the PWM's duty cycle may need to be recalculated when the frequency
//| changes. In these cases, the duty cycle is automatically recalculated
//| from the original duty cycle value. This should happen without any need
//| to manually re-set the duty cycle.
//|
STATIC mp_obj_t pulseio_pwmout_obj_get_frequency(mp_obj_t self_in) { STATIC mp_obj_t pulseio_pwmout_obj_get_frequency(mp_obj_t self_in) {
pulseio_pwmout_obj_t *self = MP_OBJ_TO_PTR(self_in); pulseio_pwmout_obj_t *self = MP_OBJ_TO_PTR(self_in);
check_for_deinit(self); check_for_deinit(self);