{signal: [
  {name: 'clk', wave: 'p..', period: 4, phase: 3},
  {name: 'en', wave: '10.......'},
  {name: 'ctrl', wave: '1..0.....'},
  {name: 'addr', wave: 'x2.......', data: ['0']},
  {name: 'd_out', wave: 'xxx2.....', data: ['0x12345678']},
  {name: 'x', wave: 'x....2...', data: ['0x12345678']}
]}