timer

C++ implementation

node {
    bool state = false;
    bool next;

    uint32_t last = 0;
    uint32_t min;

    void reset() {
        next = false;
        min = millis() % 1000;
    }

    void evaluate(Context ctx) {
        if (isInputDirty<input_RST>(ctx)) {
            reset();
            emitValue<output_MS>(ctx, last = 0);
            emitValue<output_DONE>(ctx, true);
        } else if (isInputDirty<input_TGL>(ctx)) {
            state = !state;
            if (state) {
                reset();
                emitValue<output_MS>(ctx, last);
            } else {
                last = getValue<output_MS>(ctx);
            }
        } else if (state) {
            uint32_t ms = (millis() - min + last) % 1000;
            emitValue<output_MS>(ctx, ms);
            if (ms > min) {
                next = true;
            } else if (next) {
                emitValue<output_NEXT>(ctx, next = false);
            }
        }
    }
}