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esp32-s2: Don't set PWMOut frequency to 0

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FeatherS2 crashes if you set the PWMOut frequency to 0.
This change will raise `ValueError: Invalid PWM frequency` if the requested frequency is 0.
(Lifted from the atmel-samd port)
This commit is contained in:
Randall Bohn 2021-05-03 07:15:39 -06:00 committed by GitHub
parent e6dc3e4686
commit 2db113f191
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 7 additions and 1 deletions
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6
ports/esp32s2/common-hal/pwmio/PWMOut.c
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@ -129,6 +129,12 @@ pwmout_result_t common_hal_pwmio_pwmout_construct(pwmio_pwmout_obj_t *self,
return PWMOUT_INITIALIZATION_ERROR; return PWMOUT_INITIALIZATION_ERROR;
} }
// check the frequency -- 0 is not valid
// maybe also want to reject frequency > system_clock / 2 ??
if (frequency == 0) {
return PWMOUT_INVALID_FREQUENCY;
}
// Make reservations // Make reservations
reserved_timer_freq[timer_index] = frequency; reserved_timer_freq[timer_index] = frequency;
reserved_channels[channel_index] = timer_index; reserved_channels[channel_index] = timer_index;