' Name        : LCDINX.pbp
' Compiler    : PICBASIC PRO Compiler 2.6
' Assembler   : PM or MPASM
' Target PIC  : 40-pin 16F877A, 18F452 or similar
' Hardware    : LAB-X1 Experimenter Board
' Oscillator  : 4MHz external crystal
' Keywords    : LCDIN, LCDOUT
' Description : PICBASIC PRO program to display "hello world" on LCD,
' then use LCDIN to read the first letter of each line and change it
' to upper case.
'

' Define LOADER_USED to allow use of the boot loader.
' This will not affect normal program operation.
Define LOADER_USED 1

' Define LCD registers and bits
Define LCD_DREG  PORTD
Define LCD_DBIT  4
Define LCD_RSREG PORTE
Define LCD_RSBIT 0
Define LCD_EREG  PORTE
Define LCD_EBIT  1
Define LCD_RWREG PORTE
Define LCD_RWBIT 2

character VAR BYTE

   ADCON1 = 7      ' Set PORTA and PORTE to digital
   Low PORTE.2     ' LCD R/W line low (W)
   Pause 100       ' Wait for LCD to start up

mainloop:
   LCDOut $FE, 1   ' Clear screen
   Pause 500       ' Wait .5 second

   LCDOut "hello"  ' Display "hello"
   Pause 500       ' Wait .5 second

   LCDOut $fe, $C0, "world"     ' Move to line 2  and display "world"
   Pause 500                    ' Wait .5 second

   LCDIN $80, [character]       ' Read value of first character, first line
   LCDOut $FE, $80, (character - $20) ' Change character to upper case
   Pause 500                    ' Wait .5 second

   LCDIN $C0, [character]       ' Read value of first character, second line
   LCDOut $FE, $C0, (character - $20) ' Change character to upper case
   Pause 500                    ' Wait .5 second
   GoTo mainloop                ' Do it forever

   End