Module regs

Structs

• Ccr
  Clock control register
• Cr1
  Control register 1
• Cr2
  Control register 2
• Dr
  Data register
• Fltr
  FLTR register
• Oar1
  Own address register 1
• Oar2
  Own address register 2
• Sr1
  Status register 1
• Sr2
  Status register 2
• Trise
  TRISE register