Difference between revisions of "Unit HD44780"

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<pre style="border: 0; padding-bottom:0px;">function HD44780ConsoleDestroy(Console:PConsoleDevice):LongWord;</pre>
 
<pre style="border: 0; padding-bottom:0px;">function HD44780ConsoleDestroy(Console:PConsoleDevice):LongWord;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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'''HD44780 console functions'''
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<pre style="border: 0; padding-bottom:0px;">function HD44780ConsoleOpen(Console:PConsoleDevice):LongWord;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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<pre style="border: 0; padding-bottom:0px;">function HD44780ConsoleClose(Console:PConsoleDevice):LongWord;</pre>
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<pre style="border: 0; padding-bottom:0px;">function HD44780ConsoleClear(Console:PConsoleDevice; Color:LongWord):LongWord;</pre>
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<pre style="border: 0; padding-bottom:0px;">function HD44780ConsoleScroll(Console:PConsoleDevice; X1,Y1,X2,Y2,Count,Direction:LongWord):LongWord;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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<pre style="border: 0; padding-bottom:0px;">function HD44780ConsoleDrawChar(Console:PConsoleDevice; Handle:TFontHandle; Ch:Char; X,Y,Forecolor,Backcolor:LongWord):LongWord;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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<pre style="border: 0; padding-bottom:0px;">function HD44780ConsoleDrawText(Console:PConsoleDevice; Handle:TFontHandle; const Text:String; X,Y,Forecolor,Backcolor,Len:LongWord):LongWord;</pre>
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<pre style="border: 0; padding-bottom:0px;">function HD44780ConsoleDrawBlock(Console:PConsoleDevice; X1,Y1,X2,Y2,Color:LongWord):LongWord;</pre>
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! '''Note'''
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| None documented
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<pre style="border: 0; padding-bottom:0px;">function HD44780ConsoleDrawWindow(Console:PConsoleDevice; Handle:TWindowHandle):LongWord;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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! '''Note'''
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| Caller must hold the Window lock
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<pre style="border: 0; padding-bottom:0px;">function HD44780ConsoleGetPosition(Console:PConsoleDevice; Position:LongWord; var X1,Y1,X2,Y2:LongWord):LongWord;</pre>
 
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Revision as of 00:38, 14 October 2016

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Description

The Hitachi HD44780 is a dot matrix liquid crystal display controller. It supports 5x8 or 5x10 characters and includes a 240 character font in ROM, 80 bytes of character RAM and 64 bytes of character generator RAM for custom characters.

The device support 4 bit or 8 bit modes, and has a range of standard functions for display clear, display on/off, cursor on/off, character blink, cursor shift etc.

This unit creates a Console device to represent the LCD and provides the standard console device functions (where appropriate) to draw text, clear the screen, scroll text and manage the cursor.

Currently only 4 bit mode is supported but extension to include 8 bit mode is possible with some additional setup and support functions.

Constants

To be documented

Type definitions

To be documented

Public variables

To be documented

Function declarations


HD44780 functions 

function HD44780ConsoleCreate(GPIO:PGPIODevice; const Name:String; Width,Height,RS,RW,EN,D4,D5,D6,D7:LongWord):PConsoleDevice;
Description: To be documented
Note None documented 


function HD44780ConsoleDestroy(Console:PConsoleDevice):LongWord;
Description: To be documented
Note None documented


HD44780 console functions 

function HD44780ConsoleOpen(Console:PConsoleDevice):LongWord;
Description: To be documented
Note None documented 


function HD44780ConsoleClose(Console:PConsoleDevice):LongWord;
Description: To be documented
Note None documented 


function HD44780ConsoleClear(Console:PConsoleDevice; Color:LongWord):LongWord;
Description: To be documented
Note None documented 


function HD44780ConsoleScroll(Console:PConsoleDevice; X1,Y1,X2,Y2,Count,Direction:LongWord):LongWord;
Description: To be documented
Note None documented 


function HD44780ConsoleDrawChar(Console:PConsoleDevice; Handle:TFontHandle; Ch:Char; X,Y,Forecolor,Backcolor:LongWord):LongWord;
Description: To be documented
Note None documented 


function HD44780ConsoleDrawText(Console:PConsoleDevice; Handle:TFontHandle; const Text:String; X,Y,Forecolor,Backcolor,Len:LongWord):LongWord;
Description: To be documented
Note None documented 


function HD44780ConsoleDrawBlock(Console:PConsoleDevice; X1,Y1,X2,Y2,Color:LongWord):LongWord;
Description: To be documented
Note None documented 


function HD44780ConsoleDrawWindow(Console:PConsoleDevice; Handle:TWindowHandle):LongWord;
Description: To be documented
Note Caller must hold the Window lock 


function HD44780ConsoleGetPosition(Console:PConsoleDevice; Position:LongWord; var X1,Y1,X2,Y2:LongWord):LongWord;
Description: To be documented
Note None documented


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