PWM and LEDC

PWM/LEDC is a source-board ESP32 surface. It is useful for LED brightness and servo pulses, but it is not part of the Froth Machine workshop front door.

Timer And Channel Setup

ledc.timer-config: (speed_mode, timer, freq, resolution) -> nil

Configures one LEDC timer.

ledc.timer-config: 0, 0, 1000, 10

ledc.channel-config: (pin, speed_mode, channel, timer, duty) -> nil

Attaches one pin to one LEDC channel.

ledc.channel-config: LED_BUILTIN, 0, 0, 0, 0

Duty And Frequency

ledc.set-duty: (speed_mode, channel, duty) -> nil

Sets duty but does not apply it.

ledc.update-duty: (speed_mode, channel) -> nil

Applies the duty change.

ledc.set-duty: 0, 0, 512
ledc.update-duty: 0, 0

ledc.get-duty: (speed_mode, channel) -> Int

Reads duty.

ledc.set-freq: (speed_mode, timer, freq) -> nil

Changes timer frequency.

ledc.get-freq: (speed_mode, timer) -> Int

Reads timer frequency.

ledc.stop: (speed_mode, channel, idle_level) -> nil

Stops PWM output for a channel.

Fade

ledc.fade-install: () -> nil

Installs the ESP32 fade helper.

ledc.fade-with-time: (speed_mode, channel, target_duty, time_ms) -> nil

Configures a fade.

ledc.fade-start: (speed_mode, channel, fade_mode) -> nil

Starts the configured fade.

The Fade an LED tutorial shows both a Froth-level software fade and the hardware fade helper.