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  1. #81
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    Default Re: Graphical Displays with PBP3

    Your lib file looks more like an example file. Is it correct ?
    it is. it's the driver component to enable my graphics library to use a sharp memory display.
    post #1 has typical use demos!
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  2. #82
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    Default Re: Graphical Displays with PBP3

    update to ssd1306 include to allow easier configuration for 40x72 displays

    eg
    Code:
    '****************************************************************'*  Name    : SSD1306 FOR PIC 18 DEMO                           *
    '*  Author  :  Richard                                          *
    '*  Notice  :                                                   *
    '*          :                                                   *
    '*  Date    : 27/12/2023                                         *
    '*  Version : 1.0                                               *
    '*  Notes   :                                                   *
    '*          :18f26k22 @64Mhz                                    *
    '****************************************************************
    
    
    #CONFIG
      CONFIG  FOSC = INTIO67
      CONFIG  PLLCFG = ON
      CONFIG  PRICLKEN = ON
      CONFIG  FCMEN = OFF
      CONFIG  IESO = OFF
      CONFIG  PWRTEN = ON
      CONFIG  BOREN = SBORDIS
      CONFIG  BORV = 190
      CONFIG  WDTEN = ON
      CONFIG  WDTPS = 32768
      CONFIG  CCP2MX = PORTC1
      CONFIG  PBADEN = OFF
      CONFIG  CCP3MX = PORTB5                                
      CONFIG  T3CMX = PORTC0
      CONFIG  HFOFST = ON
      CONFIG  P2BMX = PORTB5
      CONFIG  MCLRE = EXTMCLR
      CONFIG  STVREN = ON
      CONFIG  LVP = OFF
      CONFIG  XINST = OFF
      CONFIG  DEBUG = OFF
      CONFIG  CP0 = OFF
      CONFIG  CP1 = OFF
      CONFIG  CP2 = OFF
      CONFIG  CP3 = OFF
      CONFIG  CPB = OFF
      CONFIG  CPD = OFF
      CONFIG  WRT0 = OFF
      CONFIG  WRT1 = OFF
      CONFIG  WRT2 = OFF
      CONFIG  WRT3 = OFF
      CONFIG  WRTC = OFF
      CONFIG  WRTB = OFF
      CONFIG  WRTD = OFF
      CONFIG  EBTR0 = OFF
      CONFIG  EBTR1 = OFF
      CONFIG  EBTR2 = OFF
      CONFIG  EBTR3 = OFF
      CONFIG  EBTRB = OFF
    #ENDCONFIG       
     DEFINE OSC 64
        ;set these  to match display
        ssd1306_addr con $78 
        #DEFINE colours 1   ;1 mono 2 rg or 3 rgb
        width  con 72;128      
        height con 40;64      
        h_offset con 28
        
        include "grx.pbpMOD" 
        include "SSD1306.pbpMOD"
        include "Arial_Narrow18x39.bas"
    '    include "bignum.bas"       
    '    include "bigchr.bas"
        BUFF     VAR BYTE[10]
        J VAR word
      
        ANSELB=0
        ANSELC=0
        ANSELA=0
        OSCCON=$70
        
      
        gosub glcd_init
        gosub grf_clr
        SETFONT Arial_Narrow18x39
        gosub show 
                  
    main:
         while j <1000
         colour=1
         fillrect 0,0,72,40
         ARRAYWRITE BUFF,[dec2 j/10,":",dec1 j,0]
         DMDSTR 1,0,buff,0
         gosub show 
         pause 10
         j=j+1
         wend
         j=0
    goto main
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  3. #83
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    Default Re: Graphical Displays with PBP3

    Nice and useful addition to a very handy include file.

    Though I wonder up to what age you can read that displays without eye glasses...

    Ioannis

  4. #84
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    Default Re: Graphical Displays with PBP3

    Though I wonder up to what age you can read that displays without eye glasses...
    that's kinda the purpose of this universal graphics method, fonts for it of a good size are simple to make and interchangeable
    between versions and displays.
    a 5x7 font on that display needs a magnifying glass and eye glasses for me.
    note i used a 18x39 font to test with. that i can read from many metres away easily
    Warning I'm not a teacher

  5. #85
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    Default Re: Graphical Displays with PBP3

    bmp bug fix
    Attached Files Attached Files
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  6. #86
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    Default Re: Graphical Displays with PBP3

    Quote Originally Posted by richard View Post
    bmp bug fix
    Working much better, but in my case it is cropping 6 columns off of the right side of the image (110x64). Using the pbp file I uploaded here

    Here are 2 images of what it should look like (using SSDBM vs what is being displayed using DMDBMP.

    Name:  20240222_111640.jpg
Views: 6954
Size:  343.9 KB Name:  20240223_133312.jpg
Views: 6975
Size:  322.1 KB
    Shawn

  7. #87
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    Default Re: Graphical Displays with PBP3

    the bmp image width needs to be a multiple of 8 by the look of it
    post the original bmp image if you want me to look further into it
    Warning I'm not a teacher

  8. #88
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    Default Re: Graphical Displays with PBP3

    Ok, I assume that is due to the horizontal vs vertical byte layout? I know on the SSDBM you said height must be multiple of 8 which I have been adhering to. I'll either stick to using the SSDBM with this driver as it seems to do exactly what I need or revise the bitmaps to make width a multiple of 8.
    Shawn

  9. #89
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    Default Re: Graphical Displays with PBP3

    i have had a look at how those programs [lcdassist and glcd tool] manage the remainder bits when a bitmap is not an 8bit multiple in width
    and it defeats me , i cannot get how the "stray" bits of the image width are packed into the data
    if you lay the data out to match the actual width x height as i have done here
    [the last column i filled in manually only partially to get an idea of what the data needs to look like ]
    the "left over" 48 bytes at the end somehow represents the extreme rhs 6 bits , i don't see how to extract the data correctly.
    6 bits * 48 bytes is 384 bits , the stray 6 bits of width x 64 lines of height is 384 bits so there is enough information at least.
    [assuming i have not misconstrued the original image]

    Code:
    OneIcon: '110x64 horiz
    @ db 112, 0x40 
    @ db 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,0xfc
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,0x04
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,0x04
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,0x04
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,0x04
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,0x04
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,0x04
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,0x04
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,0x04
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,0x04
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0F, 0xFF, 0xFF, 0x00, 0x00, 0x00 ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xFF, 0xFF, 0x80, 0x00, 0x00 ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xFF, 0xFF, 0x80, 0x00, 0x00,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xFF, 0xFF, 0x80, 0x00, 0x00 ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0xFF, 0xFF, 0xC0, 0x00, 0x00 ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0xFF, 0xFF, 0xC0, 0x00, 0x00 ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xFF, 0xFF, 0xE0, 0x00, 0x00 ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xF0, 0x00, 0x00 ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xF0, 0x00, 0x00 ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3F, 0xFF, 0xF8, 0x00, 0x00 ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3F, 0xFF, 0xF8, 0x00, 0x00 ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1F, 0xFF, 0xFE, 0x00, 0x00 ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0F, 0xFF, 0xFF, 0x00, 0x00 ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0F, 0xFF, 0xFF, 0x80, 0x00 ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xFF, 0xFF, 0x80, 0x00  ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0xFF, 0xFF, 0xC0, 0x00  ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xFF, 0xFF, 0xE0, 0x00 ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7F, 0xFF, 0xF0, 0x00  ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3F, 0xFF, 0xFC, 0x00 ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1F, 0xFF, 0xFE, 0x00 ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0F, 0xFF, 0xFF, 0x80 ,0
    @ db 0x87, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC0 ,0
    @ db 0x87, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xF8,0
    @ db 0x87, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFC ,0
    @ db 0x87, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF  ,0
    @ db 0x87, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF  ,0
    @ db 0x87, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF  ,0
    @ db 0x87, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF  ,0
    @ db 0x87, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF  ,0
    @ db 0x87, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF  ,0
    @ db 0x87, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF ,0
    @ db 0x87, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF  ,0
    @ db 0x87, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF ,0
    @ db 0x87, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF ,0
    @ db 0x87, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF ,0
    @ db 0x87, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF ,0
    @ db 0x87, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF ,0
    @ db 0x87, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 ,0
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,0x04
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,0x04
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,0x04
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,0x04
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,0x04
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,0x04
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,0x04
    @ db 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,0x04
    @ db 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,0xfc
    
    
    '@ db 0xFC, 0x01, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x04, 0x00, 0x03, 0x00, 0x01, 0x00, 0x04, 0x00
    '@ db 0x00, 0x00, 0x03, 0x00, 0x03, 0x00, 0x01, 0x00, 0x11, 0x00, 0x00, 0x00, 0x18, 0x00, 0x01, 0x00
    '@ db 0x1A, 0x00, 0x04, 0x00, 0x28, 0x00, 0x02, 0x00, 0x38, 0x00, 0x00, 0x00, 0x4A, 0x02, 0x00, 0x00
    Warning I'm not a teacher

  10. #90
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    Default Re: Graphical Displays with PBP3

    Is there a way to do 90 degree screen rotation (using the display in portrait mode) for the text using fonts to be displayed correct?

    Changing the SSDc $20 address to $01 seems to corrupt everything, so I'm not sure if I am going down the correct path with that, or if there is a simple way to accomplish this already built in?
    Last edited by spcw1234; - 24th February 2024 at 17:39.
    Shawn

  11. #91
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    Default Re: Graphical Displays with PBP3

    The display layout still isn't quite right. Here is a simple program that displays a 16x16 image in all 4 corners the ones on the left side are good, but the right side locations are wrong.

    Code:
    'PIC18F26K22
    #CONFIG
      CONFIG  FOSC = INTIO67
      CONFIG  PLLCFG = ON
      CONFIG  PRICLKEN = ON
      CONFIG  FCMEN = OFF
      CONFIG  IESO = OFF
      CONFIG  PWRTEN = ON
      CONFIG  BOREN = SBORDIS
      CONFIG  BORV = 190
      CONFIG  WDTEN = ON
      CONFIG  WDTPS = 32768
      CONFIG  CCP2MX = PORTC1
      CONFIG  PBADEN = OFF
      CONFIG  CCP3MX = PORTB5                                
      CONFIG  T3CMX = PORTC0
      CONFIG  HFOFST = ON
      CONFIG  P2BMX = PORTB5
      CONFIG  MCLRE = EXTMCLR
      CONFIG  STVREN = ON
      CONFIG  LVP = OFF
      CONFIG  XINST = OFF
      CONFIG  DEBUG = OFF
      CONFIG  CP0 = OFF
      CONFIG  CP1 = OFF
      CONFIG  CP2 = OFF
      CONFIG  CP3 = OFF
      CONFIG  CPB = OFF
      CONFIG  CPD = OFF
      CONFIG  WRT0 = OFF
      CONFIG  WRT1 = OFF
      CONFIG  WRT2 = OFF
      CONFIG  WRT3 = OFF
      CONFIG  WRTC = OFF
      CONFIG  WRTB = OFF
      CONFIG  WRTD = OFF
      CONFIG  EBTR0 = OFF
      CONFIG  EBTR1 = OFF
      CONFIG  EBTR2 = OFF
      CONFIG  EBTR3 = OFF
      CONFIG  EBTRB = OFF
    #ENDCONFIG       
    DEFINE OSC 64
        clear
        ssd1306_addr con $78 
        #DEFINE colours 1   ;1 mono 2 rg or 3 rgb
        width  con 128      
        height con 64      
        h_offset con 0
        
        include "grx.pbpMOD" 
        include "SSD1306.pbpMOD"
        BUFF     VAR BYTE[32]
        ANSELB=0
        ANSELC=0
        ANSELA=0
        OSCCON=$70
        OSCTUNE.6=1
        gosub glcd_init
        gosub grf_clr
        gosub show 
    
    main:     ' Rotate icon clockwise around display corners
        DMDBMP 0,0,TestIcon       'top left 16x16 CORRECT PLACEMENT!
        gosub show
        pause 1000
        gosub grf_clr
        gosub show
        
        DMDBMP 111,0,TestIcon       'top right 16x16 WRONT PLACEMENT!
        gosub show
        pause 1000
        gosub grf_clr
        gosub show   
        
        DMDBMP 111,47,TestIcon       'bottom right 16x16 WRONG PLACEMENT!
        gosub show
        pause 1000
        gosub grf_clr
        gosub show   
    
        DMDBMP 0,47,TestIcon       'bottom left 16x16 CORRECT PLACEMENT!
        gosub show
        pause 1000
        gosub grf_clr
        gosub show   
    goto main 
     
    end
    
    TestIcon:
    @ db 0x10,0x10 ;16x16
    @ db 0xFF,0xFF;
    @ db 0xC0,0x03;
    @ db 0xA0,0x05;
    @ db 0x90,0x09;
    @ db 0x88,0x11;
    @ db 0x84,0x21;
    @ db 0x82,0x41;
    @ db 0x81,0x81;
    @ db 0x81,0x81;
    @ db 0x82,0x41;
    @ db 0x84,0x21;
    @ db 0x88,0x11;
    @ db 0x90,0x09;
    @ db 0xA0,0x05;
    @ db 0xC0,0x03;
    @ db 0xFF,0xFF;
    Name:  Untitled-1.jpg
Views: 7046
Size:  310.6 KB Name:  Untitled-2.jpg
Views: 6976
Size:  292.2 KB Name:  Untitled-3.jpg
Views: 6878
Size:  280.0 KB Name:  Untitled-4.jpg
Views: 6895
Size:  277.8 KB
    Last edited by spcw1234; - 24th February 2024 at 20:04. Reason: Added images
    Shawn

  12. #92
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    Default Re: Graphical Displays with PBP3

    bmp placement fixed , note that horiz placement is byte aligned ie for a 128 bit wide display there are 16 bytes therefore 16 positions max
    Attached Files Attached Files
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  13. #93
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    Default Re: Graphical Displays with PBP3

    Excellent! All seems to be working perfectly!

    Now, how can I rotate the display for use in portrait mode?
    Shawn

  14. #94
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    Default Re: Graphical Displays with PBP3

    in theory portrait mode should be easier and faster than what i have now, the screen width 64 height 128
    and the buffer sent to the screen in horiz fill mode nice and sequentially [ might need bit reversal, could be upside down or mirrored]
    i will have a look one day time permitting
    Warning I'm not a teacher

  15. #95
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    Default Re: Graphical Displays with PBP3

    a portrait version

    Name:  shawn.jpg
Views: 6977
Size:  41.3 KB

    Code:
     
    '*******************************************************************
    '*  Name    : SSD1306p.pbpmod                                          *
    '*  Author  : richard                                                 *
    '*  Notice  : Copyright (c) 2021                                      *
    '*          :                                                         *
    '*  Date    : 28/12/2023                                              *
    '*  Version : 1.1                                                     *
    '*  Notes   : generic GRX graphics DRIVER FOR SSD1306                 *
    '*          :  HW I2C PIC18 ONLY                                      *
    '*          :  40x72 disp added                                       * 
    '*          :    portrait version                                                     * 
    '*          :                                                         *
    '*          :                                                         *
    '********************************************************************** 
           ;set these  to match display IN MAIN
    '    ssd1306_addr con $78 
    '    #DEFINE colours 1   ;1 mono 2 rg or 3 rgb
    '    width  con 128      
    '    height con 32 
    '    h_offset con 0   ;28 for 40x72
    
    
           
        glrot       var byte[8]
        glrb        var byte[8]
        gltmp       var byte[3] 
        glcd_rad    var WORD
        glcdData    VAR byte  'DATA
        glcdBC      VAR BYTE  'gca  var
        page        VAR WORD  'gca  var
        gy          var byte  'gca  pg   address
        gy_         var byte  'gca  pg   address
        gx          var byte  'gca  row  address
        gx_         var byte  'gca  row  address
        ssd_add     var byte
        USERCOMMAND "SENDBYTE"     ;BYTE
        USERCOMMAND "SSDC"      ;cmd BYTE TO SSD1306
        ssdheight con WIDTH/8-1      ; 7 = 8 PAGES  64*128 ,  3 = 4 pages 32*128
        ssdwidth  con HEIGHT-1    ; 128 PIXELS WIDE   
      
    goto overssd  
    ASM
    SSDC?C  macro Cin
        MOVE?CB  Cin , _glcdData
        L?CALL   _cmd_byte
       endm 
    SSDC?B  macro Cin
        MOVE?BB  Cin , _glcdData
        L?CALL   _cmd_byte
       endm    
    SENDBYTE?B  macro Dat 
        MOVE?BB    Dat ,_glcdData
        L?CALL _send_byte 
        endm 
    SENDBYTE?W  macro Dat 
        MOVE?WB    Dat ,_glcdData
        L?CALL _send_byte 
        endm      
    SENDBYTE?C  macro Dat 
        MOVE?CB    Dat ,_glcdData
        L?CALL _send_byte 
        endm  
     ENDASM
    glcd_init:
        bgcolour = 0
        colour  = 1
        SSPSTAT = 0 'High Speed Filter
        SSPADD = $14'400 kHz @64 MHz  ?
        SSPCON1 = 101000 'I2C Master Mode Enable
        SSPCON3 = 0
        ssd_add = ssd1306_addr 
        SSDc $AE ' Display OFF
        SSDc $d5 
        SSDc $80 
        SSDc $a8 : SSDc $3f 
        SSDc $D3 : SSDc $00 ; Set Display Offset Mode Set 0  
        if ssdheight > 4  then
            SSDc $40   ' Set display start line 0 
        elseif ssdheight > 3  then
            SSDc $68   ' Set display start line 
        else
            SSDc $60   ' Set display start line 4 
        endif 
        SSDc $8D : SSDc $14 ' Set Charge Pump Internal
        SSDc $20 : SSDc $01 ' Adressing mode Horizontal
        SSDc $A1   ' set segment remap column 127 as start
        SSDc $C0   ' Com Scan Direction, Flip display vertically
        SSDc $DA   ' set COM pins
        if ssdheight > 3  then
            SSDc$12  ' set COM pins = 128x64=$12   
        else
            SSDc$02  ' set COM pins = 128x32=$02
        endif 
        SSDc $81 : SSDc$7F  ' Set brightness to $01 to $FF  ($7F is default, $01 is faint)
        SSDc $DB : SSDc$40  ' Set VCOM Deselect Level
        SSDc $B0  ' Set Page Address From $B0 to $B7 
        SSDc $2e  ; scroll off
        SSDc $A4  ' display ON continue
        SSDc $A6  ' $A6=NORMAL MODE;  $A7=INVERSE MODE
        SSDc $AF  ' Display ON
    return
    show:
    '    gosub flip
        SSDc $22
        SSDc  0       
        SSDc  ssdheight 
        SSDc $21     
        SSDc  h_offset     
        SSDc  ssdwidth + h_offset
        SSPCON2.0 = 1 ; SEN - Start Condition Enable Bit 
        WHILE SSPCON2.0 = 1 : WEND ; Wait for Start to complete
        SSPBUF = ssd_add ; Move data to SSPBUF
        WHILE SSP1STAT.2 = 1 : WEND ; SSPSTAT = 1 Transmit in progress
        While SSP1CON2.6 = 1 : WEND ; Wait for Acknowledge from slave 
        SSPBUF = $40 ; Move data to SSPBUF
        WHILE SSPSTAT.2 = 1 : WEND ; SSPSTAT = 1 Transmit in progress
        While SSPCON2.6 = 1 : WEND ; Wait for Acknowledge from slave 
        for glcd_rad = 0 to  width/8 * height -1
            SENDBYTE fbr[glcd_rad ]
        next 
        SSPCON2.2 = 1 
    '    gosub flip    
    return
    send_byte :  'DATA
        SSPBUF = glcdData; Move data to SSPBUF
        WHILE SSPSTAT.2 = 1 : WEND ; SSPSTAT = 1 Transmit in progress
        While SSPCON2.6 = 1 : WEND ; Wait for Acknowledge from slave 
    return 
    cmd_byte:  'send command sequence "glcdData "
        SSPCON2.0 = 1 ; SEN - Start Condition Enable Bit 
        WHILE SSPCON2.0 = 1 : WEND ; Wait for Start to complete
        SSPBUF = ssd_add ; Move data to SSPBUF
        WHILE SSPSTAT.2 = 1 : WEND ; SSPSTAT = 1 Transmit in progress
        While SSPCON2.6 = 1 : WEND ; Wait for Acknowledge from slave 
        SSPBUF = 0 ; Move data to SSPBUF
        WHILE SSPSTAT.2 = 1 : WEND ; SSPSTAT = 1 Transmit in progress
        While SSPCON2.6 = 1 : WEND ; Wait for Acknowledge from slave 
        SSPBUF = glcdData ; Move data to SSPBUF
        WHILE SSPSTAT.2 = 1 : WEND ; SSPSTAT = 1 Transmit in progress
        While SSPCON2.6 = 1 : WEND ; Wait for Acknowledge from slave 
        SSPCON2.2 = 1 ; PEN - send stop bit
        While SSP1CON2.2 = 1 : Wend ; Wait for SSP to complete
    return  
     overssd:

    with demo


    Code:
    'PIC18F26K22#CONFIG
      CONFIG  FOSC = INTIO67
      CONFIG  PLLCFG = ON
      CONFIG  PRICLKEN = ON
      CONFIG  FCMEN = OFF
      CONFIG  IESO = OFF
      CONFIG  PWRTEN = ON
      CONFIG  BOREN = SBORDIS
      CONFIG  BORV = 190
      CONFIG  WDTEN = ON
      CONFIG  WDTPS = 32768
      CONFIG  CCP2MX = PORTC1
      CONFIG  PBADEN = OFF
      CONFIG  CCP3MX = PORTB5                                
      CONFIG  T3CMX = PORTC0
      CONFIG  HFOFST = ON
      CONFIG  P2BMX = PORTB5
      CONFIG  MCLRE = EXTMCLR
      CONFIG  STVREN = ON
      CONFIG  LVP = OFF
      CONFIG  XINST = OFF
      CONFIG  DEBUG = OFF
      CONFIG  CP0 = OFF
      CONFIG  CP1 = OFF
      CONFIG  CP2 = OFF
      CONFIG  CP3 = OFF
      CONFIG  CPB = OFF
      CONFIG  CPD = OFF
      CONFIG  WRT0 = OFF
      CONFIG  WRT1 = OFF
      CONFIG  WRT2 = OFF
      CONFIG  WRT3 = OFF
      CONFIG  WRTC = OFF
      CONFIG  WRTB = OFF
      CONFIG  WRTD = OFF
      CONFIG  EBTR0 = OFF
      CONFIG  EBTR1 = OFF
      CONFIG  EBTR2 = OFF
      CONFIG  EBTR3 = OFF
      CONFIG  EBTRB = OFF
    #ENDCONFIG       
    DEFINE OSC 64
        clear
        ssd1306_addr con $78 
        #DEFINE colours 1   ;1 mono 2 rg or 3 rgb
        width  con 64      
        height con 128      
        h_offset con 0
        DEFINE DEBUG_REG PORTB
        DEFINE DEBUG_BIT 7
        DEFINE DEBUG_BAUD 9600
        DEFINE DEBUG_MODE 0
        LATB.7=1
        trisb.7=0
        include "grx.pbpMOD" 
        include "SSD1306p.pbpMOD"
        include "font.bas" 
        BUFF     VAR BYTE[32]
        ANSELB=0
        ANSELC=0
        ANSELA=0
        OSCCON=$70
        OSCTUNE.6=1
        SETFONT FONT5x7
        gosub glcd_init
       
    main:    
       gosub grf_clr
        gosub show 
        ARRAYWRITE BUFF,["GLCD",0]
        DMDSTR 3,75,buff,1
        DMDBMP 0,0,TestIcon
        gosub show 
        pause 5000
          
    goto main 
     
    end
    
    
    TestIcon:
    @ db 0x10,0x10 ;16x16
    @ db 0xFF,0xFF;
    @ db 0xC0,0x03;
    @ db 0xA0,0x05;
    @ db 0x90,0x09;
    @ db 0x88,0x11;
    @ db 0x84,0x21;
    @ db 0x82,0x41;
    @ db 0x81,0x81;
    @ db 0x81,0x81;
    @ db 0x82,0x41;
    @ db 0x84,0x21;
    @ db 0x88,0x11;
    @ db 0x90,0x09;
    @ db 0xA0,0x05;
    @ db 0xC0,0x03;
    @ db 0xFF,0xFF;
    Warning I'm not a teacher

  16. #96
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    Default Re: Graphical Displays with PBP3

    Excellent work Richard!!!

    This will work well for my use, but with a little more tweaking it would be nice to have a define to set 1 of 4 different viewing directions to make a more universal driver.
    Shawn

  17. #97
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    Default Re: Graphical Displays with PBP3

    Hi Richard,
    I've been using your display drivers with 12864 ST7920 LCDs and one thing that's annoying (for me) is randomly on startup I'll be getting 3 large(ish) zeros in the top left corner of the display. If they appear, there's no getting rid of them without cutting power to the display. Any idea what I'm missing here? I can still write stuff to the display, but the zeros will remain there irrespective of screen clearing. Even filling the screen with a filled (black) rectangle - the zeros are still there but just colour inverted.
    You can see if they're going to appear with the initialisation call to st7920_init as the areas around there is more populated with random dots than neighbouring areas. Sometimes it's clear enough to make them out before calling a screen clear and show.

    Could this be a timing problem on my initialisation? It's happened on various displays (same model) and various completely different programs.

    Troy
    Last edited by rocket_troy; - 8th October 2024 at 02:58.

  18. #98
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    Default Re: Graphical Displays with PBP3

    Could this be a timing problem on my initialisation?
    most likely, the displays have two screen memory regions one for graphics the other for the normal lcd character display
    at power up display is in lcd mode, the init routine sets it to graphics, lcds are slow to powerup they cannot be hurried.
    if the display is written to before graphics mode is established then its possible some lcd chrs will be displayed accidently.
    lcd chrs can only be cleared if the display is in lcd mode , graphic pixels can only be set in graphics mode
    both memories are visible on screen no matter what mode is set.
    Warning I'm not a teacher

  19. #99
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    Default Re: Graphical Displays with PBP3

    Quote Originally Posted by richard View Post
    most likely, the displays have two screen memory regions one for graphics the other for the normal lcd character display
    at power up display is in lcd mode, the init routine sets it to graphics, lcds are slow to powerup they cannot be hurried.
    if the display is written to before graphics mode is established then its possible some lcd chrs will be displayed accidently.
    lcd chrs can only be cleared if the display is in lcd mode , graphic pixels can only be set in graphics mode
    both memories are visible on screen no matter what mode is set.
    Yeah, what you've said does make sense. I've played around with all sorts of timings - like up to 10s pause after calling the st7920_init and 2s prior, but I don't think it's my writing to the display that's causing the issue as the signs are already there when I call st7920_init.

    So, are you aware of any commands I can call to initialise the "character" memory before calling st7920_init?

    Thanks,

    Troy

  20. #100
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    Default Re: Graphical Displays with PBP3

    as in my demo
    Code:
        Pause  1500      ' LCD initialize time
        lcdout $FE,1
        gosub st7920_init    'graphic mode
    Warning I'm not a teacher

  21. #101
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    Default Re: Graphical Displays with PBP3

    [mega facepalm] DUH!!!

    Thanks Richard.

    Troy

  22. #102
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    Default Re: Graphical Displays with PBP3

    Well, the zeros are still appearing even with up to 5 consecutive commands to clear the character memory. However, probably not as often. Definitely is text in the character display memory that's causing it - no doubt about it, but I'm also sure I'm doing something wrong with either the wiring or initialisation. Probably tolerable for now.

    Troy

  23. #103
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    Default Re: Graphical Displays with PBP3

    at one stage i did init like this

    st7920_init:
    lcdout $FE,$24 'In same instruction cannot alter DL, RE and G at once. Make sure that change DL or G first and then RE.
    Pause 5
    lcdout $FE,$26
    Pause 5
    bgcolour = 0
    colour = 1
    return


    also look at defines' these may need a fiddle if you display is slower than mine
    DEFINE LCD_COMMANDUS 1000 'defines the delay after LCDOUT statement DEFINE LCD_DATAUS 40 'delay in micro seconds


    ps i changed to serial mode, perhaps thats why , i forget
    Warning I'm not a teacher

  24. #104
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    Default Re: Graphical Displays with PBP3

    Quote Originally Posted by richard View Post
    at one stage i did init like this

    st7920_init:
    lcdout $FE,$24 'In same instruction cannot alter DL, RE and G at once. Make sure that change DL or G first and then RE.
    Pause 5
    lcdout $FE,$26
    Pause 5
    bgcolour = 0
    colour = 1
    return


    also look at defines' these may need a fiddle if you display is slower than mine
    DEFINE LCD_COMMANDUS 1000 'defines the delay after LCDOUT statement DEFINE LCD_DATAUS 40 'delay in micro seconds


    ps i changed to serial mode, perhaps thats why , i forget

    No luck. Maybe 1 in 10 starts I still get the zeros. Tried increasing the DEFINE LCD_COMMANDUS 1000 to 1500 and DEFINE LCD_DATAUS to 100 and inserted the code you suggested. I didn't mention I need to call the graphic mode initialisation routine a few times to get a reasonably reliable initialisation which might trigger alarm bells? So, my hunch is the display might be slightly different or my wiring is missing something: I've wired up RS, E, RW and the 4 high bits of the data bus and 5V rails. I can't think of anything else?

    Troy

  25. #105
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    Default Re: Graphical Displays with PBP3

    does it make a difference if you power it down verses a reset >\?

    also if you look at the data sheet you can see what commands are needed to make a routine to revert to lcd mode, do a clear screen then return to graphics mode
    Warning I'm not a teacher

  26. #106
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    Default Re: Graphical Displays with PBP3

    Quote Originally Posted by richard View Post
    does it make a difference if you power it down verses a reset >\?

    also if you look at the data sheet you can see what commands are needed to make a routine to revert to lcd mode, do a clear screen then return to graphics mode
    Haven't tried 1st suggestion yet, but I've been playing around with your 2nd suggestion... well... I can't find a datasheet for my displays so I've been playing the old game of finding a ST7920 DS with commands that might be close enough. So, I found one that lists a command that turns the graphics display on / off. So, I've tried simulating the issue and it goes like this:

    init code
    ...
    run some st7920_init calls with pauses
    ...
    ...
    your extra LCD commands...
    ...
    pause 1000
    lcdout $FE, %00100100 'Command to turn off graphics mode
    pause 1000
    lcdout $FE,1,"123" 'clear screen and display 123 in top left corner in text mode - the numbers 123 *are* displayed in the top left
    pause 1000
    lcdout $FE,1 'Clear screen for text mode - screen *is* cleared
    pause 1000

    lcdout $FE, %00100110 'command to turn graphics mode back on - screen still cleared (replacing this with "gosub st7920_init" produces the same outcome)

    gosub grf_clr 'clear graphics display
    colour = 1
    FILLRECT 5,35,120,8
    ARRAYWRITE BUFF2,["WAITING FOR LOAD CELL",0]
    DMDSTR 5,10, BUFF2,1
    ARRAYWRITE BUFF3,["SERIAL STREAM",0]
    DMDSTR 5,25, BUFF3,1
    gosub show 'here the stuff just here (supposed to be displayed) is displayed BUT my 123 text in the top left has also reappeared which is supposed to be cleared whilst in text mode

    ?????

  27. #107
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    Default Re: Graphical Displays with PBP3

    if you are using 4 bit mode for lcd then the DL bit must remain unset in the command
    my code assumes 4 bit mode

    to get to lcd mode RE bit must be 0

    so more like
    lcdout $FE, %00100010 'command to turn extended command set off ; might need to swap ext/gph around of maybe they can be done together - not sure
    pause 5
    lcdout $FE, %00100000 'Command to turn off graphics mode
    pause 5
    lcdout $FE,1,"123" 'clear screen and display 123 in top left corner in text mode - the numbers 123 *are* displayed in the top left
    pause 1000
    lcdout $FE,1 'Clear screen for text mode - screen *is* cleared
    pause 5

    lcdout $FE, %00100100 'command to turn extended command set on ; we know this works
    pause 5
    lcdout $FE, %00100110 'command to turn graphics mode back on
    outcome)
    Warning I'm not a teacher

  28. #108
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    Default Re: Graphical Displays with PBP3

    Thanks Richard. I had to park the project since Friday but I've just reopened it and I can see my mistake: as you said, the RE bit was the killer in my character mode command. Seems to be clearing okay now

    Cheers,

    Troy

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