blockdiag etm_channel {
    default_fontsize = 12;
    node_width = 200;
    node_height = 40;

    event_gpio [label = "GPIO Event", shape = "beginpoint", stacked];
    other_events [shape = "dots"];
    event_others [label = "Periph Event", shape = "beginpoint", stacked];
    channels0 [label = "Channel-N", stacked];
    channels1 [label = "Channel-M", stacked];
    other_channels [shape = "dots"];
    task_gpio [label = "GPIO Task", shape = "endpoint", stacked];
    task_others [label = "Other Tasks", shape = "endpoint", stacked];
    other_tasks [shape = "dots"];

    event_gpio -> channels0;
    event_others -> channels1;
    other_events -> other_channels;
    channels0 -> task_gpio;
    channels1 -> task_others;
    other_channels -> other_tasks;
}