# Delayed Pulse

Process

Generates a delayed pulse at the output when triggered by a rising edge on the input

Delayed Pulse

Delayed Pulse ver: 1

# Inputs

ID	Abbrev	Name	Type	Default	Description
`input`	`I`	Input	BOOLEAN	`false`	Input trigger signal. A rising edge starts the delayed pulse sequence.

# Outputs

ID	Abbrev	Name	Type	Default	Description
`output`	`O`	Output	BOOLEAN	`false`	Output pulse signal. Goes high after the configured delay duration and stays high for the configured pulse duration.

# Configuration

ID	Name	Type	Default	Unit	Description
`delay`	Duration of delay	NUMBER	`2`	s	Delay duration before the output pulse is generated after a rising edge on the input Details: ≥ 0
`pulse`	Duration of output pulse	NUMBER	`0.1`	s	Duration of the output pulse that is generated after the delay Details: ≥ 0

# State

ID	Name	Type	Default	Unit	Description
`last_input_state`	Last input state	BOOLEAN	`false`		Stores the previous state of the input to detect rising edges

# Source Code

View Volang source

channel = input::channel()
value = input::value()

delay_ms = math::round(config::get("delay") * 1000)

// Handle callback execution
extern fn onCallback(value) {
    if (value == 1) {
        // Delay complete - start output pulse
        pulse_ms = math::round(config::get("pulse") * 1000)
        output::set("output", true)
        if (pulse_ms > 0) {
            callback::set(pulse_ms, "onCallback", 2)
        } else {
            // Zero pulse duration - immediately turn off
            output::set("output", false)
        }
        return
    }

    if (value == 2) {
        // Pulse complete - turn off output
        output::set("output", false)
        return
    }
}

// Handle input changes - detect rising edge
if (channel == "input") {
    last_input_state = state::get("last_input_state")

    // Detect rising edge
    if (value and !last_input_state) {
        state::set("last_input_state", true)

        // Cancel any pending callbacks and reset output
        callback::clear()
        output::set("output", false)

        // Schedule delay
        if (delay_ms > 0) {
            callback::set(delay_ms, "onCallback", 1)
        } else {
            // Zero delay - immediately start pulse
            pulse_ms = math::round(config::get("pulse") * 1000)
            output::set("output", true)
            if (pulse_ms > 0) {
                callback::set(pulse_ms, "onCallback", 2)
            } else {
                output::set("output", false)
            }
        }
    }

    // Track falling edge
    if (!value and last_input_state) {
        state::set("last_input_state", false)
    }
}