LCD

Action

Send constant or variable to LCD display.

 

 

Syntax

LCD x

 

 

Remarks

X	Variable or constant to display.

 

More variables can be displayed separated by the ; -sign

 

LCD a ; b1 ; "constant"

 

The LCD statement behaves just like the PRINT statement. So SPC() can be used too.

The only difference with PRINT is that no CR+LF is added when you send data to the LCD.

 

 

See also

$LCD , $LCDRS , CONFIG LCD , SPC , CLS , INITLCD , SHIFTLCD , SHIFTCURSOR , CURSOR , LCDCMD, LCDDATA

 

 

Example

'-----------------------------------------------------------------------------------------
'name : lcd.bas
'copyright : (c) 1995-2005, MCS Electronics
'purpose : demo: LCD, CLS, LOWERLINE, SHIFTLCD, SHIFTCURSOR, HOME
' CURSOR, DISPLAY
'micro : Mega8515
'suited for demo : yes
'commercial addon needed : no
'-----------------------------------------------------------------------------------------
 
$regfile = "m8515.dat" ' specify the used micro
$crystal = 4000000 ' used crystal frequency
$baud = 19200 ' use baud rate
$hwstack = 32 ' default use 32 for the hardware stack
$swstack = 10 ' default use 10 for the SW stack
$framesize = 40 ' default use 40 for the frame space
 
 
$sim
'REMOVE the above command for the real program !!
'$sim is used for faster simulation
 
 
'note : tested in PIN mode with 4-bit
 
'Config Lcdpin = Pin , Db4 = Portb.1 , Db5 = Portb.2 , Db6 = Portb.3 , Db7 = Portb.4 , E = Portb.5 , Rs = Portb.6
Config Lcdpin = Pin , Db4 = Porta.4 , Db5 = Porta.5 , Db6 = Porta.6 , Db7 = Porta.7 , E = Portc.7 , Rs = Portc.6
'These settings are for the STK200 in PIN mode
'Connect only DB4 to DB7 of the LCD to the LCD connector of the STK D4-D7
'Connect the E-line of the LCD to A15 (PORTC.7) and NOT to the E line of the LCD connector
'Connect the RS, V0, GND and =5V of the LCD to the STK LCD connector
 
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 1 , 225 , 227 , 226 , 226 , 226 , 242 , 234 , 228 ' replace ? with number (0-7)
Deflcdchar 0 , 240 , 224 , 224 , 255 , 254 , 252 , 248 , 240 ' 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 ------------
_temp1 = 1 'value into ACC
!rCall _write_lcd 'put it on LCD
REM BETTER USE LCDCMD
End

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