com.dalsemi.system
Class BitPort

java.lang.Object
  |
  +--com.dalsemi.system.BitPort

public class BitPort

extends java.lang.Object

This class allows bit manipulation of available processor port pins, SMC Ethernet controller port pins (DS80C390 only) and provides abstracted methods of manipulating bits in memory mapped IO addresses through the DataPort class.

See Also:

DataPort

Field Summary

static byte	ETH_EEDO DS80C390: SMC EEDO, output ONLY, pin 4.
static byte	ETH_EESK DS80C390: SMC EESK, output ONLY, pin 7.
static byte	ETH_IOS0 DS80C390: SMC IOS0, input ONLY, pin 98.
static byte	ETH_IOS1 DS80C390: SMC IOS1, input ONLY, pin 99.
static byte	ETH_IOS2 DS80C390: SMC IOS2, input ONLY, pin 1.
int	latchValue The last written value.
static byte	Port1Bit0 DS80C400: P1.0, T2
static byte	Port1Bit1 DS80C400: P1.1, T2EX
static byte	Port1Bit2 DS80C400: P1.2, RXD1
static byte	Port1Bit3 DS80C400: P1.3, TXD1
static byte	Port1Bit4 DS80C400: P1.4, INT2, DCD4
static byte	Port1Bit5 DS80C400: P1.5, INT3, DTR4
static byte	Port1Bit6 DS80C400: P1.6, INT4, RTS4
static byte	Port1Bit7 DS80C400: P1.7, INT5, Quiet Boot Jumper
static byte	Port3Bit0 P3.0, RXD0, "serial 0", pin 4.
static byte	Port3Bit1 P3.1, TXD0, "serial 0", pin 5.
static byte	Port3Bit2 P3.2, /INT0, /SMCINT (Ethernet interrupt), pin 6.
static byte	Port3Bit3 P3.3, /INT1, /EXTINT (External interrupt), pin 7.
static byte	Port3Bit4 P3.4, T0, /SMCRST (Ethernet Reset), pin 10.
static byte	Port3Bit5 390: P3.5, T1, INTOW (Internal 1-Wire), pin 11.
static byte	Port5Bit0 P5.0, C0TX, I2C SCL, pin 21.
static byte	Port5Bit1 P5.1, C0RX, I2C SDA, pin 20.
static byte	Port5Bit2 390: P5.2, C1RX, RXD1, DS2480 RX, "serial 1", pin 19.
static byte	Port5Bit3 390: P5.3, C1TX, TXD1, DS2480 TX, "serial 1", pin 18.
static byte	Port5Bit4 P5.4, /PCE0, pin 17.
static byte	Port5Bit5 P5.5, /PCE1, pin 16.
static byte	Port5Bit6 P5.6, /PCE2, pin 15.
static byte	Port5Bit7 P5.7, /PCE3, pin 14.

Constructor Summary

BitPort(byte bitname)
Creates a new instance of BitPort using the bit specified.

BitPort(DataPort port)
Creates a new instance of BitPort using the DataPort object specified.

Method Summary

void	clear() Clears the port pin low.
void	clear(int bitpos) Clears the specified bit low.
int	read() Reads the port pin.
int	readBit(int bitpos) Reads the specified pin.
int	readLatch() Reads the current latch value.
int	readLatch(int bitpos) Reads the latch value of the specified pin.
void	set() Sets the pin high.
void	set(int bitpos) Sets the specified bit high.

Methods inherited from class java.lang.Object

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

Field Detail

Port5Bit0

public static final byte Port5Bit0

P5.0, C0TX, I2C SCL, pin 21.

Port5Bit1

public static final byte Port5Bit1

P5.1, C0RX, I2C SDA, pin 20.

Port5Bit2

public static final byte Port5Bit2

390: P5.2, C1RX, RXD1, DS2480 RX, "serial 1", pin 19. 400: P5.2, T3, LED

Port5Bit3

public static final byte Port5Bit3

390: P5.3, C1TX, TXD1, DS2480 TX, "serial 1", pin 18. 400: P5.3: available, connect for Net Boot jumper

Port5Bit4

public static final byte Port5Bit4

P5.4, /PCE0, pin 17.

Port5Bit5

public static final byte Port5Bit5

P5.5, /PCE1, pin 16.

Port5Bit6

public static final byte Port5Bit6

P5.6, /PCE2, pin 15.

Port5Bit7

public static final byte Port5Bit7

P5.7, /PCE3, pin 14.

Port3Bit0

public static final byte Port3Bit0

P3.0, RXD0, "serial 0", pin 4.

Port3Bit1

public static final byte Port3Bit1

P3.1, TXD0, "serial 0", pin 5.

Port3Bit2

public static final byte Port3Bit2

P3.2, /INT0, /SMCINT (Ethernet interrupt), pin 6.

Port3Bit3

public static final byte Port3Bit3

P3.3, /INT1, /EXTINT (External interrupt), pin 7.

Port3Bit4

public static final byte Port3Bit4

P3.4, T0, /SMCRST (Ethernet Reset), pin 10.

Port3Bit5

public static final byte Port3Bit5

390: P3.5, T1, INTOW (Internal 1-Wire), pin 11. 400: P3.5, T1, CLKO

ETH_EESK

public static final byte ETH_EESK

DS80C390: SMC EESK, output ONLY, pin 7. WARNING: This pin may also be used as serial flow control by the serial driver. Be aware of resource usage. You have been warned!

ETH_EEDO

public static final byte ETH_EEDO

DS80C390: SMC EEDO, output ONLY, pin 4. WARNING: This pin may also be used as serial flow control by the serial driver. Be aware of resource usage. You have been warned!

ETH_IOS0

public static final byte ETH_IOS0

DS80C390: SMC IOS0, input ONLY, pin 98. WARNING: This pin may also be used as serial flow control by the serial driver. Be aware of resource usage. You have been warned!

ETH_IOS1

public static final byte ETH_IOS1

DS80C390: SMC IOS1, input ONLY, pin 99. WARNING: This pin may also be used as serial flow control by the serial driver. Be aware of resource usage. You have been warned!

ETH_IOS2

public static final byte ETH_IOS2

DS80C390: SMC IOS2, input ONLY, pin 1. WARNING: This pin may also be used as serial flow control by the serial driver. Be aware of resource usage. You have been warned!

Port1Bit0

public static final byte Port1Bit0

DS80C400: P1.0, T2

Port1Bit1

public static final byte Port1Bit1

DS80C400: P1.1, T2EX

Port1Bit2

public static final byte Port1Bit2

DS80C400: P1.2, RXD1

Port1Bit3

public static final byte Port1Bit3

DS80C400: P1.3, TXD1

Port1Bit4

public static final byte Port1Bit4

DS80C400: P1.4, INT2, DCD4

Port1Bit5

public static final byte Port1Bit5

DS80C400: P1.5, INT3, DTR4

Port1Bit6

public static final byte Port1Bit6

DS80C400: P1.6, INT4, RTS4

Port1Bit7

public static final byte Port1Bit7

DS80C400: P1.7, INT5, Quiet Boot Jumper

latchValue

public int latchValue

The last written value.

Constructor Detail

BitPort

public BitPort(byte bitname)

Creates a new instance of BitPort using the bit specified.

Parameters:

bitname - descriptor of bit to twiddle (e.g. Port5Bit0)

BitPort

public BitPort(DataPort port)

Creates a new instance of BitPort using the DataPort object specified.

Parameters:

port - An eight bit wide field of bits to twiddle

Method Detail

set

public void set()

Sets the pin high.

clear

public void clear()

Clears the port pin low.

read

public int read()

Reads the port pin.

Returns:

pin value

readLatch

public int readLatch()

Reads the current latch value. This is always the last value written. To read the current value of the pin, call the read method.

Returns:

latch value

set

public void set(int bitpos)
         throws IllegalAddressException

Sets the specified bit high.

Parameters:

bitpos - value 0-7 of bit to set

Throws:

IllegalAddressException - if DataPort reports an exception during the operation

clear

public void clear(int bitpos)
           throws IllegalAddressException

Clears the specified bit low.

Parameters:

bitpos - value 0-7 of bit to clear

Throws:

IllegalAddressException - if DataPort reports an exception during the operation

readBit

public int readBit(int bitpos)
            throws IllegalAddressException

Reads the specified pin.
Side effect: Will update all bits in the byte.

Parameters:

bitpos - value 0-7 of bit to read.

Returns:

port pin value

Throws:

IllegalAddressException - if DataPort reports an exception during the operation

readLatch

public int readLatch(int bitpos)

Reads the latch value of the specified pin. This is always the last value written. To read the current value of the pin, call the read method.

Parameters:

bitpos - value 0-7 of bit to read.

Returns:

latch value