PIC16f877a with Nokia 5110 Display in assembly

kgavionics · Jul 12, 2013

HI
i have a nokia 5510 LCD display and i'm wondering if some one have try to use it with assembly,because the only tutorial i find on internet are written with C.

can someone tell me how can i do to initialize the display and write a simple string on it.

thanks in advance

Jinzpaul4u · Jul 12, 2013

Hi there,

Please check LCD communication is either serial or parallel ?

Best regards,

kgavionics · Jul 12, 2013

Hi
It's s serial Lcd
Here's the datasheet :
https://www.sparkfun.com/datasheets/LCD/Monochrome/Nokia5110.pdf

jayanth.devarayanadurga · Jul 12, 2013

Please post the C Code and mention your uC. I will try to implement the code in assembly language.

tpetar · Jul 12, 2013

kgavionics said:
Hi
It's s serial Lcd
Here's the datasheet :
https://www.sparkfun.com/datasheets/LCD/Monochrome/Nokia5110.pdf

Please we should know about which Nokia phone we talking and which LCD is involved.

Thread have name Nokia 5510 and supplied datasheet is for Nokia 5110, coplete two different phones and displays.

https://en.wikipedia.org/wiki/Nokia_5510

https://en.wikipedia.org/wiki/Nokia_5110

Best regards,
Peter

kgavionics · Jul 13, 2013

Hi all
This is the one i'm talking about
https://www.sparkfun.com/products/10168
This is a standalone display made by philips and intended to nokia phones.

tpetar · Jul 13, 2013

Interfacing Nokia 3510i and 5110 LCD with PIC Microcontroller
**broken link removed**

PIC and 5110 Interface with SPI hardware – PR3
**broken link removed**

Nokia 5110 LCD

Best regards,
Peter

kgavionics · Jul 13, 2013

Thanks peter for the link,unfortunately the programming language its not assembly.I'm trying to do a function to write a pixel to the Lcd.i know assembler is not very used often,but i like assembler because with it i can understand every aspect of hardware.with C language it's efficient with the pic18 and up,but with pic16 and down, better use of assembler.

tpetar · Jul 13, 2013

Controlling a nokia5110 lcd with software SPI on a pic16f84a
https://diytronics.blogspot.com/2011/05/controlling-nokia5110-lcd-with-software.html

Code:

Start    BSF  03h,5         ;switch from bank 0 to 1

    MOVLW  b'00000000' ;Out RB to output
    MOVWF 06h
    MOVLW  b'00000'       ;Out RA to output
    MOVWF 05h

    BCF 03h,5          ;switch from bank 1 to 0     
;RB0=sclk
;RB1=sda
;RB2=D_C
;RB3=Sce
;RB4=reset
;RB5=disp pwr
Begin
    bsf 06h,3 ;disable serial
    bsf 06h,5 ;power on display
    nop
    bcf 06h,4 ;reset
    nop
    bsf 06h,4 ;release from reset

; sel extended instruction set (h=1)
    movlw b'00100001'
    movwf 0Ch
    call spi_command

; set Vop (Contrast)
    movlw b'10111001'
    movwf 0Ch
    call spi_command

; sel normal instruction set (h=0)
    movlw b'00100000'
    movwf 0Ch
    call spi_command

; display normal mode
    movlw b'00001100'
    movwf 0Ch
    call spi_command

;---------------------------

; draw H
    movlw b'01111111'
    movwf 0Ch
    call spi_data
    movlw b'00001000'
    movwf 0Ch
    call spi_data
    movlw b'00001000'
    movwf 0Ch
    call spi_data
    movlw b'00001000'
    movwf 0Ch
    call spi_data
    movlw b'01111111'
    movwf 0Ch
    call spi_data

call _space

; draw e
    movlw b'00001110'
    movwf 0Ch
    call spi_data
    movlw b'00010101'
    movwf 0Ch
    call spi_data
    movlw b'00010101'
    movwf 0Ch
    call spi_data
    movlw b'00010101'
    movwf 0Ch
    call spi_data
    movlw b'00001100'
    movwf 0Ch
    call spi_data

call _space

; draw l
    movlw b'00000000'
    movwf 0Ch
    call spi_data
    movlw b'01000001'
    movwf 0Ch
    call spi_data
    movlw b'01111111'
    movwf 0Ch
    call spi_data
    movlw b'00000001'
    movwf 0Ch
    call spi_data
    movlw b'00000000'
    movwf 0Ch
    call spi_data

call _space

; draw l
    movlw b'00000000'
    movwf 0Ch
    call spi_data
    movlw b'01000001'
    movwf 0Ch
    call spi_data
    movlw b'01111111'
    movwf 0Ch
    call spi_data
    movlw b'00000001'
    movwf 0Ch
    call spi_data
    movlw b'00000000'
    movwf 0Ch
    call spi_data

call _space

; draw o
    movlw b'00001110'
    movwf 0Ch
    call spi_data
    movlw b'00010001'
    movwf 0Ch
    call spi_data
    movlw b'00010001'
    movwf 0Ch
    call spi_data
    movlw b'00010001'
    movwf 0Ch
    call spi_data
    movlw b'00001110'
    movwf 0Ch
    call spi_data

call _space

; goto y=1,x=0
    movlw b'00000001'
    movwf 0Ch
    movlw b'00000000'
    movwf 0Dh
    call setxy

; draw W
    movlw b'01111110'
    movwf 0Ch
    call spi_data
    movlw b'00000001'
    movwf 0Ch
    call spi_data
    movlw b'00001110'
    movwf 0Ch
    call spi_data
    movlw b'00000001'
    movwf 0Ch
    call spi_data
    movlw b'01111110'
    movwf 0Ch
    call spi_data

call _space

; draw o
    movlw b'00001110'
    movwf 0Ch
    call spi_data
    movlw b'00010001'
    movwf 0Ch
    call spi_data
    movlw b'00010001'
    movwf 0Ch
    call spi_data
    movlw b'00010001'
    movwf 0Ch
    call spi_data
    movlw b'00001110'
    movwf 0Ch
    call spi_data

call _space

; draw r
    movlw b'00011111'
    movwf 0Ch
    call spi_data
    movlw b'00001000'
    movwf 0Ch
    call spi_data
    movlw b'00010000'
    movwf 0Ch
    call spi_data
    movlw b'00010000'
    movwf 0Ch
    call spi_data
    movlw b'00001000'
    movwf 0Ch
    call spi_data

call _space

; draw l
    movlw b'00000000'
    movwf 0Ch
    call spi_data
    movlw b'01000001'
    movwf 0Ch
    call spi_data
    movlw b'01111111'
    movwf 0Ch
    call spi_data
    movlw b'00000001'
    movwf 0Ch
    call spi_data
    movlw b'00000000'
    movwf 0Ch
    call spi_data

call _space

; draw d
    movlw b'00001110'
    movwf 0Ch
    call spi_data
    movlw b'00010001'
    movwf 0Ch
    call spi_data
    movlw b'00010001'
    movwf 0Ch
    call spi_data
    movlw b'00001001'
    movwf 0Ch
    call spi_data
    movlw b'01111111'
    movwf 0Ch
    call spi_data

call _space

; draw !
    movlw b'01111101'
    movwf 0Ch
    call spi_data

;---------------------------
; goto y=5,x=0
    movlw b'00000101'
    movwf 0Ch
    movlw b'00000000'
    movwf 0Dh
    call setxy
;draw image block 4
    movlw b'10000111';1
    movwf 0Ch
    call spi_data
    movlw b'11111101';2
    movwf 0Ch
    call spi_data
    movlw b'10000001';3
    movwf 0Ch
    call spi_data
    movlw b'01100001';4
    movwf 0Ch
    call spi_data
    movlw b'00010001';5
    movwf 0Ch
    call spi_data
    movlw b'11001001';6
    movwf 0Ch
    call spi_data
    movlw b'00100101';7
    movwf 0Ch
    call spi_data
    movlw b'00100101';8
    movwf 0Ch
    call spi_data
    movlw b'11100001';9
    movwf 0Ch
    call spi_data
    movlw b'00011001';10
    movwf 0Ch
    call spi_data
    movlw b'00000101';11
    movwf 0Ch
    call spi_data
    movlw b'00000011';12
    movwf 0Ch
    call spi_data
    movlw b'00000011';13
    movwf 0Ch
    call spi_data
    movlw b'00000001';14
    movwf 0Ch
    call spi_data
    movlw b'00111001';15
    movwf 0Ch
    call spi_data
    movlw b'11101101';16
    movwf 0Ch
    call spi_data
    movlw b'00000111';17
    movwf 0Ch
    call spi_data

; goto y=4,x=0
    movlw b'00000100'
    movwf 0Ch
    movlw b'00000000'
    movwf 0Dh
    call setxy
;draw image block 3
    movlw b'00000111';1
    movwf 0Ch
    call spi_data
    movlw b'00111100';2
    movwf 0Ch
    call spi_data
    movlw b'01100100';3
    movwf 0Ch
    call spi_data
    movlw b'01010011';4
    movwf 0Ch
    call spi_data
    movlw b'11110000';5
    movwf 0Ch
    call spi_data
    movlw b'00111000';6
    movwf 0Ch
    call spi_data
    movlw b'11111001';7
    movwf 0Ch
    call spi_data
    movlw b'11111011';8
    movwf 0Ch
    call spi_data
    movlw b'10010011';9
    movwf 0Ch
    call spi_data
    movlw b'11110100';10
    movwf 0Ch
    call spi_data
    movlw b'11110100';11
    movwf 0Ch
    call spi_data
    movlw b'01110100';12
    movwf 0Ch
    call spi_data
    movlw b'01110000';13
    movwf 0Ch
    call spi_data
    movlw b'00010000';14
    movwf 0Ch
    call spi_data
    movlw b'00100100';15
    movwf 0Ch
    call spi_data
    movlw b'10011111';16
    movwf 0Ch
    call spi_data
    movlw b'11010000';17
    movwf 0Ch
    call spi_data
    movlw b'01110000';18
    movwf 0Ch
    call spi_data

; goto y=3,x=0
    movlw b'00000011'
    movwf 0Ch
    movlw b'00000000'
    movwf 0Dh
    call setxy
;draw image block 2
    movlw b'00011100';1
    movwf 0Ch
    call spi_data
    movlw b'00010110';2
    movwf 0Ch
    call spi_data
    movlw b'00010010';3
    movwf 0Ch
    call spi_data
    movlw b'00010010';4
    movwf 0Ch
    call spi_data
    movlw b'00010011';5
    movwf 0Ch
    call spi_data
    movlw b'00010001';6
    movwf 0Ch
    call spi_data
    movlw b'00110001';7
    movwf 0Ch
    call spi_data
    movlw b'00100000';8
    movwf 0Ch
    call spi_data
    movlw b'01100000';9
    movwf 0Ch
    call spi_data
    movlw b'01000000';10
    movwf 0Ch
    call spi_data
    movlw b'11000000';11
    movwf 0Ch
    call spi_data
    movlw b'10000000';12
    movwf 0Ch
    call spi_data
    movlw b'00000000';13
    movwf 0Ch
    call spi_data
    movlw b'00000010';14
    movwf 0Ch
    call spi_data
    movlw b'00011111';15
    movwf 0Ch
    call spi_data
    movlw b'01110001';16
    movwf 0Ch
    call spi_data
    movlw b'11000000';17
    movwf 0Ch
    call spi_data

; goto y=2,x=12
    movlw b'00000010'
    movwf 0Ch
    movlw b'00001100'
    movwf 0Dh
    call setxy
;draw image block 1
    movlw b'00000001';12
    movwf 0Ch
    call spi_data
    movlw b'00000001';13
    movwf 0Ch
    call spi_data
    movlw b'00000011';14
    movwf 0Ch
    call spi_data
    movlw b'00000010';15
    movwf 0Ch
    call spi_data
    movlw b'00000010';16
    movwf 0Ch
    call spi_data
    movlw b'00000011';17
    movwf 0Ch
    call spi_data

a goto a

;----------------------------

spi_command
    bcf 06h,3 ;start serial transmission
    bcf 06h,2 ;D_C=0
        btfss 0Ch,7
        goto c1
        call one
        goto c1n
    c1    call zero
    c1n    btfss 0Ch,6
        goto c2
        call one
        goto c2n
    c2    call zero
    c2n    btfss 0Ch,5
        goto c3
        call one
        goto c3n
    c3    call zero
    c3n    btfss 0Ch,4
        goto c4
        call one
        goto c4n
    c4    call zero
    c4n    btfss 0Ch,3
        goto c5
        call one
        goto c5n
    c5    call zero
    c5n    btfss 0Ch,2
        goto c6
        call one
        goto c6n
    c6    call zero
    c6n    btfss 0Ch,1
        goto c7
        call one
        goto c7n
    c7    call zero
    c7n    btfss 0Ch,0
        goto cd
        call one
        goto cdn
    cd    call zero
cdn    bcf 06h,0
    bsf 06h,3 ;end serial transmission
return

spi_data
    bcf 06h,3 ;start serial transmission
    bsf 06h,2 ;D_C=1
        btfss 0Ch,0
        goto b1
        call one
        goto b1n
    b1    call zero
    b1n    btfss 0Ch,1
        goto b2
        call one
        goto b2n
    b2    call zero
    b2n    btfss 0Ch,2
        goto b3
        call one
        goto b3n
    b3    call zero
    b3n    btfss 0Ch,3
        goto b4
        call one
        goto b4n
    b4    call zero
    b4n    btfss 0Ch,4
        goto b5
        call one
        goto b5n
    b5    call zero
    b5n    btfss 0Ch,5
        goto b6
        call one
        goto b6n
    b6    call zero
    b6n    btfss 0Ch,6
        goto b7
        call one
        goto b7n
    b7    call zero
    b7n    btfss 0Ch,7
        goto d
        call one
        goto dn
    d    call zero
dn    bcf 06h,0
    bsf 06h,3 ;end serial transmission
return

zero
    bcf 06h,0
    bcf 06h,1 ;0
    bsf 06h,0 ;sclk pulse
return

one
    bcf 06h,0
    bsf 06h,1 ;1
    bsf 06h,0 ;sclk pulse
return

_space ;send byte='00000000', draw space
    movlw b'00000000'
    movwf 0Ch
    call spi_data
return

setxy
    bsf 0Ch,6
    call spi_command
    bsf 0Dh,7
    movf 0Dh,0
    movwf 0Ch
    call spi_command
return

end

Best regards,
Peter

;-)

bigdogguru · Jul 13, 2013

The 5110 and 3310 displays are quite similar, same controller, resolution, and almost the same pinout.

The following blog includes assembly source for the PIC16F84, which can be easily ported to virtually any PIC16F series, including the PIC16F877A.

Code ASM - [expand]
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; ###### lcd test for nokia 3310 display ######
;               AC 7/8/08
;
; The display is connected as follows:
; RB0   SDI     Data line               
; RB1   SCK     Serial clock- clock data in on rising edge
; RB2   SCE     Serial Clock enable- active low
; RB3   D/C     Data/Command select, high = data; low = command
; RB4   RES     Reset   
 
        ; just a few assembler directives
        list    p=16f84
        include <p16F84.inc>
        __config        _CP_OFF & _PWRTE_OFF & _WDT_OFF & _XT_OSC
 
        
        ;Bank 0 special function file registers
status  equ     0x03            ; Status register.
porta   equ     0x05            ; Port A
portb   equ     0x06            ; Port B
eedata  equ     0x08            ; EEPROM Data register
eeaddr  equ     0x09            ; EEPROM Address register
intcon  equ     0x0b            ; Interrupt control register
 
        ;Bank 0 file registers above 0b for general use
count1  equ     0x0c            ; General Use loop counter
count2  equ     0x0d            ; General Use loop counter
count3  equ     0x0e            ; General Use loop counter      
count4  equ     0x0f            ; loop ctr, used in display clear
count5  equ     0x10            ; as above      
outbyt  equ     0x11            ; byte to send to display
sck     equ     0x12            ; used for serial clocking count
 
        ;bank 1 special function file registers
trisa   equ     0x85            ; Port A direction control
trisb   equ     0x86            ; Port B direction control
eecon1  equ     0x88            ; EEPROM Control register 1
eecon2  equ     0x89            ; EEPROM Control register 2     
                
        org     0x00            ; Set program memory base at reset vector 0x00
 
reset
        goto    start           ; Go to start of the main program
        org     0x04            ; Set program memory base to beginning of user code
 
start
        ; set up the ports with RA 0-3 output, RA4 input
        ; RB0-7 output
        bsf     status, 5       ;go to bank 1
        movlw   0x10            ;send 00010000  
        movwf   trisa           ;to TRISA
        movlw   0x00            ;send 00000000
        movwf   trisb           ;to TRISB
        bcf     status, 5       ;and return to bank 0   
        
        ; Initialise the I/O ports as necessary.
        movlw   0x00
        movwf   porta           ;set port a to zeros
        movlw   0x1C            ;set LCD lines on port b as follows:
                                ;RES high
                                ;D/C high
                                ;SCE high
                                ;SCK low
        movwf   portb           ;SDA low
        
 
main    
        bcf   portb, 4          ;take reset line low
        call  delay1            ;wait 5mS
        bsf   portb, 4          ;and set it high again
        bcf   portb, 3          ;take D/C line low (go to command mode)
        movlw 0x21              ;Activate chip and H=1
        call  dispout   
        movlw 0xC2              ;Set LCD voltage to 7v
        call  dispout
        movlw 0x13              ;Set bias
        call  dispout
        movlw 0x20              ;Set horizontal addressing and H=0
        call  dispout
        movlw 0x09              ;Activate all segments
        call  dispout                   
        bsf   portb, 3          ;set D/C line low
        call  clrdisp           ;clear display RAM
        bcf   portb, 3          ;set D/C line high again
        movlw 0x08              ;Blank display
        call  dispout   
        movlw 0x0C              ;Display normal
        call  dispout   
        bsf   portb, 3          ;set D/C line high
        call  home              ;and goto top left
 
        ;write greeting to display
        movlw 0x7f              ;H
        call dispout            ;
        movlw 0x08              ;
        call dispout            ;
        movlw 0x08              ;       
        call dispout            ;
        movlw 0x08              ;
        call dispout            ;
        movlw 0x7f              ;
        call dispout            ;
        movlw 0x00              ;
        call dispout            ;
        movlw 0x38              ;e
        call dispout            ;
        movlw 0x54              ;
        call dispout            ;
        movlw 0x54              ;       
        call dispout            ;
        movlw 0x54              ;
        call dispout            ;
        movlw 0x18              ;
        call dispout            ;
        movlw 0x00              ;
        call dispout            ;
        movlw 0x00              ;l
        call dispout            ;
        movlw 0x41              ;
        call dispout            ;
        movlw 0x7f              ;       
        call dispout            ;
        movlw 0x40              ;
        call dispout            ;
        movlw 0x00              ;
        call dispout            ;
        movlw 0x00              ;
        call dispout            ;
        movlw 0x00              ;l
        call dispout            ;
        movlw 0x41              ;
        call dispout            ;
        movlw 0x7f              ;       
        call dispout            ;
        movlw 0x40              ;
        call dispout            ;
        movlw 0x00              ;
        call dispout            ;
        movlw 0x00              ;
        call dispout            ;
        movlw 0x38              ;o
        call dispout            ;
        movlw 0x44              ;
        call dispout            ;
        movlw 0x44              ;       
        call dispout            ;
        movlw 0x44              ;
        call dispout            ;
        movlw 0x38              ;
        call dispout            ;
        movlw 0x00              ;
        call dispout            ;
        movlw 0x00              ;space
        call dispout            ;
        movlw 0x00              ;
        call dispout            ;
        movlw 0x00              ;       
        call dispout            ;
        movlw 0x00              ;
        call dispout            ;
        movlw 0x00              ;
        call dispout            ;
        movlw 0x00              ;
        call dispout            ;
        movlw 0x3f              ;W
        call dispout            ;
        movlw 0x40              ;
        call dispout            ;
        movlw 0x38              ;       
        call dispout            ;
        movlw 0x40              ;
        call dispout            ;
        movlw 0x3f              ;
        call dispout            ;
        movlw 0x00              ;
        call dispout            ;
        movlw 0x38              ;o
        call dispout            ;
        movlw 0x44              ;
        call dispout            ;
        movlw 0x44              ;       
        call dispout            ;
        movlw 0x44              ;
        call dispout            ;
        movlw 0x38              ;
        call dispout            ;
        movlw 0x00              ;
        call dispout            ;
        movlw 0x7c              ;r
        call dispout            ;
        movlw 0x08              ;
        call dispout            ;
        movlw 0x04              ;       
        call dispout            ;
        movlw 0x04              ;
        call dispout            ;
        movlw 0x08              ;
        call dispout            ;
        movlw 0x00              ;
        call dispout            ;
        movlw 0x00              ;l
        call dispout            ;
        movlw 0x41              ;
        call dispout            ;
        movlw 0x7f              ;       
        call dispout            ;
        movlw 0x40              ;
        call dispout            ;
        movlw 0x00              ;
        call dispout            ;
        movlw 0x00              ;
        call dispout            ;
        movlw 0x38              ;d
        call dispout            ;
        movlw 0x04              ;
        call dispout            ;
        movlw 0x44              ;       
        call dispout            ;
        movlw 0x48              ;
        call dispout            ;
        movlw 0x7f              ;
        call dispout            ;
        movlw 0x00              ;
        call dispout            ;
        movlw 0x02              ;?
        call dispout            ;
        movlw 0x01              ;
        call dispout            ;
        movlw 0x51              ;       
        call dispout            ;
        movlw 0x09              ;
        call dispout            ;
        movlw 0x06              ;
        call dispout            ;
        movlw 0x00              ;
        call dispout            ;
        movlw 0x00              ;space
        call dispout            ;
        movlw 0x00              ;
        call dispout            ;
        movlw 0x00              ;       
        call dispout            ;
        movlw 0x00              ;
        call dispout            ;
        movlw 0x00              ;
        call dispout            ;
        movlw 0x00              ;
        call dispout            ;
testbars:       
        call delay2
        movlw 0xff      
        call dispout
        
 
        goto  testbars          ;lets do it all again
 
        ;Subroutines start here
 
clrdisp:
        ;clears display by writing 0x00 504 times i.e to all RAM locations
        call home               ;start at top left
        movlw   0x7E
        movwf   count4
        movlw   0x03
        movwf   count5
cdloop: 
        movlw   0x00                    
        call dispout    
        decfsz  count4, 1
        goto    cdloop
        decfsz  count5, 1
        goto    cdloop                  
        return
        
        
home:   
        ;resets addressing to top left
        bcf     portb, 3
        movlw   0x40
        call    dispout
        movlw   0x80
        call    dispout
        bsf     portb, 3
        return
 
dispout:
        bcf     portb, 2        ;take SCE line low
        movwf   outbyt          ;save what's in w to outbyt
        movlw   0x08            ;we're going to clock out 8 bits
        movwf   sck             ;so set up the clock counter
        
ckloop:
        bcf     portb, 0        ;set SDA low for now...
        btfsc   outbyt, 7       ;test bit 7 of outbyt
        bsf     portb, 0        ;set SDA high if bit 7 is high  
        bsf     portb, 1        ;take SCK high
        bcf     portb, 1        ;and low again to clock the bit in      
        rlf     outbyt          ;rotate outbyt left to be ready with next bit
        decfsz  sck, 1          ;all bits sent?
        goto    ckloop          ;no, do next
        bsf     portb, 2        ;yes, take SCE line high 
        return                  ;done.
 
delay2  ; 1 second delay
        movlw   0x8d            ;count however many iterations of delay1
        movwf   count3          ;
dl2lp1                          ;this means delay 2 loop 1
        call delay1             ;
        decfsz  count3,1        ;
        goto    dl2lp1          ;
        return                  ;and then exit
 
delay1  ; 5 mS delay
        movlw   0xff            ;preset the variables to their starting values
        movwf   count1          ;
        movlw   0x09            
        movwf   count2
dl1lp1
        decfsz  count1,1        ;run around this loop 255 times
        goto    dl1lp1          ;
        decfsz  count2,1
        goto    dl1lp1
        return                  ;exit on completion
 
        
        
 
        
        
        
        end

I would also add that although the 5110 display is often advertised as 5v tolerant or even can be operated at 5v, doing so will drastically short the lifespan of the unit which was design to operate at 2.7v to 3.3v range.

BigDog

kgavionics · Jul 13, 2013

Thank you guys i'll try to program my 16f877a with one of these codes and i'll give you a feedback.

kgavionics · Jul 18, 2013

hi guys
i have studied how spi protocol works, and i did a liltle project
https://www.edaboard.com/threads/293925/#post1256894
now to talk with the LCD i have a little question: In pic16f877a datasheet they say that the slave must send data and the master must check the sent data to continue sending the new data.
with the NOKIA LCD i don,t have the SDO output to tie it to the pic, so how can i do to solve this problem?

thanks in advance

jayanth.devarayanadurga · Jul 19, 2013

If the slave does not have SDO it means it can only read in data and not send data. You only have to send data to the device. Post a datasheet of the device or the driver chip used in the display. Looking at the timing diagram it can be said how to send data to the device.

kgavionics · Jul 19, 2013

jayanth.devarayanadurga said:
If the slave does not have SDO it means it can only read in data and not send data. You only have to send data to the device. Post a datasheet of the device or the driver chip used in the display. Looking at the timing diagram it can be said how to send data to the device.

that's what i thought, i was a little bit confused with microchip datasheet,because they said even though you don't need the data sent by the slave you must read them and throw them away.

jayanth.devarayanadurga · Jul 19, 2013

How much did you pay for the LCD 5110?

kgavionics · Jul 19, 2013

jayanth.devarayanadurga said:
How much did you pay for the LCD 5110?

i payed 15 bucks for 5 displays on ebay with free shipping.very good deal.

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