avrora.sim.mcu
Class ATMega128L.SimImpl.Timer16Bit.PairedRegister

java.lang.Object
  avrora.sim.State.RWIOReg
      avrora.sim.mcu.ATMega128L.SimImpl.Timer16Bit.PairedRegister

All Implemented Interfaces:

State.IOReg

Direct Known Subclasses:

ATMega128L.SimImpl.Timer16Bit.OCRnxPairedRegister

Enclosing class:

ATMega128L.SimImpl.Timer16Bit

protected class ATMega128L.SimImpl.Timer16Bit.PairedRegister

extends State.RWIOReg

The PairedRegister class exists to implement the shared temporary register for the high byte of the 16-bit registers corresponding to a 16-bit timer. Accesses to the high byte of a register pair should go through this temporary byte. According to the manual, writes to the high byte are stored in the temporary register. When the low byte is written to, both the low and high byte are updated. On a read, the temporary high byte is updated when a read occurs on the low byte. The PairedRegister should be installed in place of the low register. Reads/writes on this register will act accordingly on the low register, as well as initiate a read/write on the associated high register.

Field Summary

Fields inherited from class avrora.sim.State.RWIOReg

value

Method Summary

byte	read() The read() method reads the 8-bit value of the IO register as a byte.
boolean	readBit(int bit) The readBit() method reads a single bit from the IO register.
void	write(byte val) The write() method writes an 8-bit value to the IO register as a byte.
void	writeBit(int bit, boolean val) The writeBit() method writes a single bit value into the IO register at the specified bit offset.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

write

public void write(byte val)

Description copied from class: State.RWIOReg

The write() method writes an 8-bit value to the IO register as a byte. For simple RWIOReg instances, this simply writes the internally stored value.

Specified by:

write in interface State.IOReg

Overrides:

write in class State.RWIOReg

Parameters:

val - the value to write

writeBit

public void writeBit(int bit,
                     boolean val)

Description copied from interface: State.IOReg

The writeBit() method writes a single bit value into the IO register at the specified bit offset.

Specified by:

writeBit in interface State.IOReg

Overrides:

writeBit in class State.RWIOReg

read

public byte read()

Description copied from class: State.RWIOReg

The read() method reads the 8-bit value of the IO register as a byte. For simple RWIOReg instances, this simply returns the internally stored value.

Specified by:

read in interface State.IOReg

Overrides:

read in class State.RWIOReg

Returns:

the value of the register as a byte

readBit

public boolean readBit(int bit)

Description copied from class: State.RWIOReg

The readBit() method reads a single bit from the IO register.

Specified by:

readBit in interface State.IOReg

Overrides:

readBit in class State.RWIOReg

Parameters:

bit - the number of the bit to read

Returns:

the value of the bit as a boolean