{
  "signal": [
    {"name":"clk",   "wave":"p.........."},
    {"name":"rst_n", "wave":"10........."},
    {"name":"valid", "wave":"0.1..0.1..."},
    {"name":"ready", "wave":"0...1..0.1."},
    {"name":"data",  "wave":"x.3.4..5..x","data":["A5","B2","C3"]},
    {"name":"last",  "wave":"0....10...."}
  ],
  "head": {"text":"Waveform Editor"},
  "foot": {"tock":0},
  "config": {"hscale": 1}
}