lcd.bas

Bascom 8051 LCD program

'--------------------------------------------------------------
'                 (c) 1997-2001 MCS Electronics
'--------------------------------------------------------------
'  file: LCD.BAS
'  demo: LCD, CLS, LOWERLINE, SHIFTLCD, SHIFTCURSOR, HOME
'        CURSOR, DISPLAY
'--------------------------------------------------------------
$sim
Rem The $sim statement will remove long delays for the simulator
Rem It is important to remove this statement when compiling the final file

'Config Lcdpin = Pin , Db4 = P3.1 , Db5 = P3.2 , Db6 = P3.3 , Db7 = P3.4 , E = P3.5 , Rs = P3.6
Rem with the config lcdpin statement you can override the compiler settings


Dim A As Byte
Config Lcd = 16 * 2                     'configure lcd screen
'other options are 16 * 4 and 20 * 4, 20 * 2 , 16 * 1a
'When you dont include this option 16 * 2 is assumed
'16 * 1a is intended for 16 character displays with split addresses over 2 lines

'$LCD = address will turn LCD into 8-bit databus mode
'       use this with uP with external RAM and/or ROM
'       because it aint need the port pins !

Cls                                     'clear the LCD display
Lcd "Hello world."                      'display this at the top line
Wait 1
Lowerline                               'select the lower line
Wait 1
Lcd "Shift this."                       'display this at the lower line
Wait 1
For A = 1 To 10
   Shiftlcd Right                       'shift the text to the right
   Wait 1                               'wait a moment
Next

For A = 1 To 10
   Shiftlcd Left                        'shift the text to the left
   Wait 1                               'wait a moment
Next

Locate 2 , 1                            'set cursor position
Lcd "*"                                 'display this
Wait 1                                  'wait a moment

Shiftcursor Right                       'shift the cursor
Lcd "@"                                 'display this
Wait 1                                  'wait a moment

Home Upper                              'select line 1 and return home
Lcd "Replaced."                         'replace the text
Wait 1                                  'wait a moment

Cursor Off Noblink                      'hide cursor
Wait 1                                  'wait a moment
Cursor On Blink                         'show cursor
Wait 1                                  'wait a moment
Display Off                             'turn display off
Wait 1                                  'wait a moment
Display On                              'turn display on
'-----------------NEW support for 4-line LCD------
Thirdline
Lcd "Line 3"
Fourthline
Lcd "Line 4"
Home Third                              'goto home on line three
Home Fourth
Home F                                  'first letteer also works
Locate 4 , 1 : Lcd "Line 4"
Wait 1

'Now lets build a special character
'the first number is the characternumber (0-7)
'The other numbers are the rowvalues
'Use the LCD tool to insert this line
Deflcdchar 0 , 31 , 17 , 17 , 17 , 17 , 17 , 31 , 0' replace ? with number (0-7)
Deflcdchar 1 , 16 , 16 , 16 , 16 , 16 , 16 , 16 , 31' replace ? with number (0-7)
Cls                                     'select data RAM
Rem it is important that a CLS is following the deflcdchar statements because it will set the controller back in datamode
Lcd Chr(0) ; Chr(1)                     'print the special character

'----------------- Now use an internal routine ------------
Acc = 1                                 'value into ACC
Call Write_lcd                          'put it on LCD
End