Package org.deepjava.runtime.zynq7000.driver

Class HD44780U

java.lang.Object

org.deepjava.runtime.arm32.Task

org.deepjava.runtime.zynq7000.driver.HD44780U

All Implemented Interfaces:

FlinkDefinitions, Iarm32, Actionable

public class HD44780U
extends Task
implements FlinkDefinitions

Driver for character display with 2 - 4 rows and 16 columns.
Display controller: HD44780U

Connected to flink gpios of the Zynq7000.

  GPIO:     Display:
  gpio[0]   D0 (data line)
  gpio[1]   D1 (data line)
  gpio[2]   D2 (data line)
  gpio[3]   D3 (data line)
  gpio[4]   D4 (data line)
  gpio[5]   D5 (data line)
  gpio[6]   D6 (data line)
  gpio[7]   D7 (data line)
  gpio[8]   RS (Data/Instruction)
  gpio[9]   E (Enable)
  gpio[10]  R/W' (Read/Write)
 

Base setting: Display On, Cursor On, Blink On, Increment, no shift.

Field Summary

Fields inherited from class org.deepjava.runtime.arm32.Task

done, firstErr, maxNofTasks, nextTime, nofActivations, period, periodNs, safe, time

Fields inherited from interface org.deepjava.flink.core.FlinkDefinitions

ANALOG_INPUT_INTERFACE_ID, ANALOG_OUTPUT_INTERFACE_ID, CHANNEL_OFFSET, COUNTER_INTERFACE_ID, GPIO_INTERFACE_ID, HEADER_SIZE, INFO_DEVICE_ID, INFO_DEVICE_SIZE, INTERFACE_TYPE_MASK, MOD_CONF_OFFSET, MOD_STATUS_OFFSET, PPWA_INTERFACE_ID, PWM_INTERFACE_ID, REGISTER_WIDTH, REGISTER_WIDTH_BIT, SIZE_OFFSET, SUBHEADER_SIZE, TOTAL_HEADER_SIZE, TYPE_OFFSET, UART_INTERFACE_ID, UNIQUE_ID_OFFSET, WD_INTERFACE_ID

Fields inherited from interface org.deepjava.runtime.arm32.Iarm32

ACTLR, CPACR, CPSR, D0, D1, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D2, D20, D21, D22, D23, D24, D25, D26, D27, D28, D29, D3, D30, D31, D4, D5, D6, D7, D8, D9, FPSCR, ID_ISAR0, ID_ISAR1, ID_ISAR2, ID_ISAR3, LR, LR_ABT, LR_FIQ, LR_IRQ, LR_MON, LR_SVC, LR_UND, LR_USR, MIDR, MPIDR, MPUIR, PC, R0, R1, R10, R10_FIQ, R11, R11_FIQ, R12, R12_FIQ, R2, R3, R4, R5, R6, R7, R8, R8_FIQ, R9, R9_FIQ, S0, S1, S10, S11, S12, S13, S14, S15, S16, S17, S18, S19, S2, S20, S21, S22, S23, S24, S25, S26, S27, S28, S29, S3, S30, S31, S4, S5, S6, S7, S8, S9, SCTLR, SP, SP_ABT, SP_FIQ, SP_IRQ, SP_MON, SP_SVC, SP_UND, SP_USR, SPSR_ABT, SPSR_FIQ, SPSR_IRQ, SPSR_MON, SPSR_SVC, SPSR_UND

Method Summary

Modifier and Type	Method	Description
void	action()	Do not call this method!
void	clearDisplay()	Clears the display.
static HD44780U	getInstance()	Returns an instance of Display Driver HD44780U
void	init(int nofRows)	Initialisation of the display.
void	onOff(boolean displayOn, boolean cursorOn, boolean blinkOn)	Manages the displays and the cursor functions.
void	setCursor(int row, int column)	Sets the cursor on desired destination.
void	writeChar(char ch)	Writes a character ch on the display at current cursor position.
void	writeInt(int i, int fieldLen)	Writes an integer value on the display.
void	writeLn()	Writes a line feed.

Methods inherited from class org.deepjava.runtime.arm32.Task

install, remove, time

Methods inherited from class java.lang.Object

equals, getClass, hashCode, toString

Method Detail

setCursor

public void setCursor(int row,
                      int column)

Sets the cursor on desired destination.

Parameters:

row - row: starting with row 0.

column - column: starting with 0.

writeChar

public void writeChar(char ch)

Writes a character ch on the display at current cursor position.

Parameters:

ch - character to write.

writeLn

public void writeLn()

Writes a line feed.

writeInt

public void writeInt(int i,
                     int fieldLen)

Writes an integer value on the display.

Parameters:

i - value to write.

fieldLen - number of characters which should be used to display the value.

clearDisplay

public void clearDisplay()

Clears the display.

onOff

public void onOff(boolean displayOn,
                  boolean cursorOn,
                  boolean blinkOn)

Manages the displays and the cursor functions.

Parameters:

displayOn - true: switch on the display.

cursorOn - true: The position of the cursor are displayed with an underline

blinkOn - true: Cursor is blinking

action

public void action()

Do not call this method!

Specified by:

action in interface Actionable

Overrides:

action in class Task

init

public void init(int nofRows)

Initialisation of the display.

Parameters:

nofRows - number of rows present in the display: 2, 3 or 4.

getInstance

public static HD44780U getInstance()

Returns an instance of Display Driver HD44780U

Returns:

Instance of display driver HD44780U