avr-device 0.8.1

Register access crate for AVR microcontrollers
Documentation 
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# Patches for the Two-Wire-Interface peripheral (i2c)
#
# - Make the Control Register read-write with only the
#   "Write Collision Flag" being read-only
# - Fix the "Slave Address Mask" description
# - Fix the Prescaler enumerated values
TWI*:
  TWCR:
    _modify:
      TWWC:
        access: read-only
  TWAMR:
    _modify:
      TWAM*:
        description: "TWI (Slave) Address Mask Bits"
  TWSR:
    _modify:
      TWS:
        access: read-only
    TWPS:
      _replace_enum:
        PRESCALER_1: [0, "Prescaler Value 1"]
        PRESCALER_4: [1, "Prescaler Value 4"]
        PRESCALER_16: [2, "Prescaler Value 16"]
        PRESCALER_64: [3, "Prescaler Value 64"]