com.embeddedunveiled.serial

Enum SerialComManager.PARITY

java.lang.Object

java.lang.Enum<SerialComManager.PARITY>

com.embeddedunveiled.serial.SerialComManager.PARITY

All Implemented Interfaces:

Serializable, Comparable<SerialComManager.PARITY>

Enclosing class:

SerialComManager

public static enum SerialComManager.PARITY
extends Enum<SerialComManager.PARITY>

Pre-defined enum constants for enabling type of parity in a serial frame.

Enum Constant Summary

Enum Constants

Enum Constant and Description
P_EVEN The number of bits in the frame with the value one is even.
P_MARK The parity bit is set to the mark signal condition (logical 1).
P_NONE The uart frame does not contain any parity bit.
P_ODD The number of bits in the frame with the value one is odd.
P_SPACE The parity bit is set to the space signal condition (logical 0).

Method Summary

Methods

Modifier and Type	Method and Description
int	getValue()
static SerialComManager.PARITY	valueOf(String name) Returns the enum constant of this type with the specified name.
static SerialComManager.PARITY[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

P_NONE

public static final SerialComManager.PARITY P_NONE

The uart frame does not contain any parity bit. Errors are handled by application for example using CRC algorithm.

P_ODD

public static final SerialComManager.PARITY P_ODD

The number of bits in the frame with the value one is odd. If the sum of bits with a value of 1 is odd in the frame, the parity bit's value is set to zero. If the sum of bits with a value of 1 is even in the frame, the parity bit value is set to 1, making the total count of 1's in the frame an odd number.

P_EVEN

public static final SerialComManager.PARITY P_EVEN

The number of bits in the frame with the value one is even. The number of bits whose value is 1 in a frame is counted. If that total is odd, the parity bit value is set to 1, making the total count of 1's in the frame an even number. If the count of ones in a frame a is already even, the parity bit's value remains 0.

Odd parity may be more fruitful since it ensures that at least one state transition occurs in each character, which makes it more reliable as compared even parity.

Even parity is a special case of a cyclic redundancy check (CRC), where the 1-bit CRC is generated by the polynomial x+1.

P_MARK

public static final SerialComManager.PARITY P_MARK

The parity bit is set to the mark signal condition (logical 1). An application may use the 9th (parity) bit for some form of addressing or special signaling.

P_SPACE

public static final SerialComManager.PARITY P_SPACE

The parity bit is set to the space signal condition (logical 0). The mark and space parity is uncommon, as it adds no error detection information.

Method Detail

values

public static SerialComManager.PARITY[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (SerialComManager.PARITY c : SerialComManager.PARITY.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static SerialComManager.PARITY valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

getValue

public int getValue()