LCD for PIC tutorials

[c828]

hello!
I am newcomer with PIC (I have used Pic19f84)
But i don't know to control and display LCD
I want a tutorial about it
Can you help me?
Thanks a lot

 

[Nigel Goodwin]

hello!
I am newcomer with PIC (I have used Pic19f84)
But i don't know to control and display LCD
I want a tutorial about it
Can you help me?
Thanks a lot

Try reading the 'sticky' at the top of this forum, and check my PIC tutorials!.

 

[amindzo]

Hi,
please try this:

' Set LCD Data port
DEFINE LCD_DREG PORTB
' Set starting Data bit (0 or 4) if 4-bit bus
DEFINE LCD_DBIT 4
' Set LCD Register Select port
DEFINE LCD_RSREG PORTB
' Set LCD Register Select bit
DEFINE LCD_RSBIT 1
' Set LCD Enable port
DEFINE LCD_EREG PORTB
' Set LCD Enable bit
DEFINE LCD_EBIT 0
' Set LCD bus size (4 or 8 bits)
DEFINE LCD_BITS 4
' Set number of lines on LCD
DEFINE LCD_LINES 2
pause 100
lcdout $fe,1,"Hello"
end


LCD Connection
Pin1=Vss: connect to ground
Pin2=Vdd: connect to Vcc=5V
Pin3=Vo: connect to middle pin of the POT(20K) to control brightness
Pin4=RS(register select): connect to micro pins that specify in the software(RB1)
Pin5=RW(Read/Write): connect to ground because we want to only write
Pin6=E(Enable): connect to micro pin that specify in the software(RB0)
Pin7 to 10: No connection
Pin 11 to 14: connect to RB4 to RB7
Pin15: connect to Vcc with a resistor(100 or 200 ohm resistor is good)
Pin16: connect to ground.
pin 16 and pin 16 are for backlights

the other two pins of pot should connect to VCC and ground and you should connect the MCLR with a 4.7K or 10K resistor to the VCC.

 

[Pommie]

What version of basic is this?

Mike.

 

[amindzo]

Hi,
it is an old one.
micro code studio picbasic pro 2.41

 

[atferrari]

And this? Pic19f84

 

[Nigel Goodwin]

And this? Pic19f84

Presumably a typo?, it should be the obselete 16F84.

 

[c828]

Thank you very much!
But I write in ASM, I don't write by PicBasic
Can you help me again?

 

[Nigel Goodwin]

Thank you very much!
But I write in ASM, I don't write by PicBasic
Can you help me again?

Didn't you read my previous post? - consult my tutorials which have excellent assembler LCD routines!.