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fix(ledc): duty_start bit should wait for its self-clear before next set on esp32

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Song Ruo Jing
2025-07-22 15:05:10 +08:00
parent 92b84443f3
commit d87de032df
14 changed files with 38 additions and 41 deletions
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components/hal/esp32/include/hal/ledc_ll.h
+5 -3
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@@ -481,13 +481,15 @@ static inline void ledc_ll_set_sig_out_en(ledc_dev_t *hw, ledc_mode_t speed_mode
* @param hw Beginning address of the peripheral registers
* @param speed_mode LEDC speed_mode, high-speed mode or low-speed mode
* @param channel_num LEDC channel index (0-7), select from ledc_channel_t
* @param duty_start The duty start
*
* @return None
*/
static inline void ledc_ll_set_duty_start(ledc_dev_t *hw, ledc_mode_t speed_mode, ledc_channel_t channel_num, bool duty_start)
static inline void ledc_ll_set_duty_start(ledc_dev_t *hw, ledc_mode_t speed_mode, ledc_channel_t channel_num)
{
hw->channel_group[speed_mode].channel[channel_num].conf1.duty_start = duty_start;
// wait until the last duty change took effect (duty_start bit will be self-cleared when duty update or fade is done)
// this is necessary on ESP32 only, otherwise, internal logic might mess up (later targets with SOC_LEDC_SUPPORT_FADE_STOP allow to re-configure parameters while last update is still in progress)
while (hw->channel_group[speed_mode].channel[channel_num].conf1.duty_start);
hw->channel_group[speed_mode].channel[channel_num].conf1.duty_start = 1;
}
/**