diff options
| -rw-r--r-- | ports/rp2/machine_pwm.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/ports/rp2/machine_pwm.c b/ports/rp2/machine_pwm.c index 2952a4306..d2cb93795 100644 --- a/ports/rp2/machine_pwm.c +++ b/ports/rp2/machine_pwm.c @@ -91,7 +91,7 @@ STATIC mp_obj_t mp_machine_pwm_freq_get(machine_pwm_obj_t *self) { uint32_t source_hz = clock_get_hz(clk_sys); uint32_t div16 = pwm_hw->slice[self->slice].div; uint32_t top = pwm_hw->slice[self->slice].top; - uint32_t pwm_freq = 16 * source_hz / div16 / top; + uint32_t pwm_freq = 16 * source_hz / div16 / (top + 1); return MP_OBJ_NEW_SMALL_INT(pwm_freq); } @@ -123,7 +123,7 @@ STATIC void mp_machine_pwm_freq_set(machine_pwm_obj_t *self, mp_int_t freq) { mp_raise_ValueError(MP_ERROR_TEXT("freq too small")); } pwm_hw->slice[self->slice].div = div16_top; - pwm_hw->slice[self->slice].top = top; + pwm_hw->slice[self->slice].top = top - 1; } STATIC mp_obj_t mp_machine_pwm_duty_get_u16(machine_pwm_obj_t *self) { |