LCD code makes no sense

[Michael]

Here is a page that has code to run the LCD with PBP. I have no experince with LCDOUT so looking for decent tutorials (aren't any really).

http://melabs.com/samples/PBP-mixed/lcd.htm


Huh ? !

It has a lot of references in comments to the LCD connections but nothing in the main code. ? I haven't tested it because it doesn't make any sense.
What if I wanted to use different ports etc.

Where is there a decent tutorial on LCDOUT ? The Picbasic manual also is rather vague.

[Michael]

Nevermind. Got it now.

Didn't know it actually has default pins for LCDOUT.

[Scampy]

' LCD should be connected as follows:
12
' LCD   PIC
13
' DB4   PortA.0
14
' DB5   PortA.1
15
' DB6   PortA.2
16
' DB7   PortA.3
17
' RS    PortA.4 (add 4.7K pullup resistor to 5 volts)
18
' E     PortB.3
19
' RW    Ground
20
' Vdd   5 volts
21
' Vss   Ground
22
' Vo    20K potentiometer (or ground)
23
' DB0-3 No connect

The comments give you a clue as to how to connect the LCD !

You don't have to use "dedicated" pins, but you do need to define what pins you use for the connections

This works with an LCD connected to port B

'*******************************************************************************
' LCD (20 x 4) set up 
'*******************************************************************************

DEFINE LCD_DREG  PORTB                  ' LCD Data port
DEFINE LCD_DBIT  0                      ' starting Data bit (0 or 4)
DEFINE LCD_EREG  PORTB                  ' LCD Enable port
DEFINE LCD_EBIT  5                      '     Enable bit  (on EasyPIC 5 LCD)
DEFINE LCD_RSREG PORTB                  ' LCD Register Select port
DEFINE LCD_RSBIT 4                      '     Register Select bit   (on EasyPIC 5 LCD)
DEFINE LCD_BITS  4                      ' LCD bus size (4 or 8 bits)
DEFINE LCD_LINES 4                      ' number of lines on LCD
DEFINE LCD_COMMANDUS 2000               ' Command delay time in us 
DEFINE LCD_DATAUS 50                    ' Data delay time in us