Using Nokia LCD

[astanapane]

hi all again,

i see that a lot of you having problem to write on the nokia lcd using the pic16f628a.

i'm also stragling to do it and i havent been able to fix my problems.

i'm trying to use the following files from the page http://www.picbasic.co.uk/forum/cont...Nokia-3310-LCD but no luck.

a very simple code i'm trying to display is the following.

DEFINE OSC 4

@ DEVICE pic16F628A, INTRC_OSC, WDT_OFF, PWRT_OFF, BOD_OFF, MCLR_ON, LVP_OFF, CPD_OFF, PROTECT_OFF 

include "modedefs.bas"
include "LCD_3310.pbp"


        TRISB = %00011100        			'portB configuration  0=out 1=in
        TRISA = %10100000        			'portA configuration
        PortA = %11100000        
        CMCON = 7                		
        VRCON = 0                		
        INTCON = 0              

OPTION_REG=%00000111   					'weak pullups on, TMRO prescale = 256
                                                
Lcd_DC      var PortB.0 
Lcd_SDA     var PortA.3
Lcd_RST     var PortA.4
Lcd_CLK     var PortA.2

start:

@ PrintStr  0,0, "I love being"
@ PrintStr  0,1, "able to print "
@ PrintStr  0,2, "so easily!"

goto start

i will post later on the full code using the pic16f628a. It is seems that is been compiled but i dont see anything on the screen. I have checked connection and everything is ok.

I have also checked the nokia lcd with a circuit that work and didnt see a problem.

[fratello]

Maybe must to do this in your "LCD_3310.pbp" file :

'Port Mapping                   'Change to match your application
Lcd_CLK         VAR Portc.3     'LCD Clock
Lcd_DC          VAR Portf.6     'LCD Data/Command
Lcd_SCE          VAR Portf.7     'LCD Chip Enable
Lcd_RES         VAR Portd.3     'LCD Reset
'Lcd_VCC         VAR Porte.2     'LCD Power (always powered for this hardware)
Lcd_SDO         VAR Portc.5     'LCD Data

I use a lot of 16F628A (and 648A) in my projects (see http://www.picbasic.co.uk/forum/show...204#post103204 and topic) and works verry fine !

[astanapane]

fratello,

thank you very much for your info and nice to meet you.

I've read all the articles here from you.

I only want to use the Nokia LCD for one of my RFID projects.

Nokia LCDs are fearly cheap and hopefully i manage to get them work.

Once i go home i will try to change as you suggested.

thanks again.

Lcd_DC      var PortB.0 
Lcd_SDA     var PortA.3
Lcd_RST     var PortA.4
Lcd_CLK     var PortA.2

with this

'Port Mapping                   'Change to match your application
Lcd_CLK         VAR Porta.2    'LCD Clock
Lcd_DC          VAR Portb.0     'LCD Data/Command
Lcd_SCE          VAR Port     'LCD Chip Enable ??? here i also need to assign a port for enable??? or this goes to ground?
Lcd_RES         VAR Porta.4     'LCD Reset
'Lcd_VCC         VAR Port?     'LCD Power (always powered for this hardware) any port assigned to give power????
Lcd_SDO         VAR Porta.3    'LCD Data

[fratello]

I ALWAYS use this LCD with SCE to ground . Try to find Nokia 5110 display ; it's more easy to "interfacing".
LE : I don't use LCD_VCC from PIC's. Just be careful to power with maxim 3.3 volts !!! Now I use this (second) schematic, with good results !

[astanapane]

i will follow your schematics,

i will post what error i get now after compiling the following program

DEFINE OSC 4
@ device  P16F628A
@ __INTRC_OSC, WDT_OFF, PWRT_OFF, BOD_OFF, MCLR_ON, LVP_OFF, CPD_OFF, PROTECT_OFF 

include "modedefs.bas"
include "3310.inc"

        TRISB = %00011100        			'portB configuration  0=out 1=in
        TRISA = %10100000        			'portA configuration
        PortA = %11100000        
        CMCON = 7                		
        VRCON = 0                		
        INTCON = 0                  		              

OPTION_REG=%00000111   					'weak pullups on, TMRO prescale = 256


start:

@ PrintStr  0,0, "I love being"
@ PrintStr  0,1, "able to print "
@ PrintStr  0,2, "so easily!"

goto start

[astanapane]

i get the following error

[mister_e]

1. Must use MPASM to compile
2. You need to change the way you set the config fuses, check the FAQ.
3. I've never used this program, so I can't tell if this will grandpa 16F628's codespace, may need to use a 'bigger' one.

[fratello]

@ DEVICE pic16F628A, intOSC_osc_noclkout, WDT_OFF, PWRT_OFF, BOD_OFF, MCLR_ON