0.96" OLED SPI Display with SSD1306

[kent_twt4]

So here is a modified GLCD_SSD1306.h file to add the SPI/serial 4 wire interface, like here: http://www.electrodragon.com/product/0-96-12864-oled-display-iicspi/

Also attached is the demonstration code to try out the GLCD commands.

[Anobium]

Thanks Kent.

The is some code that is commented out - in the .h. It would be really good if you could remove.

May I pick these files up and move into the next release?

[kent_twt4]

Alright, cleaned up the commented code I think, let me know. Thanks for looking.

Yes, good to go on using the files.

Using "#startup" for the INIT_GLCD_SSD1306 is a little tricky to negotiate. There is the possiblity of running the code before the data direction pins are set. The new library has to handle that by setting the data direction pins inside the INIT_GLCD_SSD1306.

[kent_twt4]

Sorry to report a hiccup with code. During development having the programmer hooked up fulltime masked an intitial startup problem on power up. The RES pin is now pulsed low briefly per datasheet, instead of tied to Vcc. No gibberish now.

[Anobium]

Thanks.

A few question:

Why INITGLCD_SSD1306? Can you try without this? What happens? If the #startup is not working then we should fix.

Do yoy have a few moments to test a fully set of GLCD capabilities? add this to the demo.

; ----- Define variables

  Dim BYTENUMBER, CCOUNT as Byte

  CCount = 0
  dim longNumber as long
  longNumber = 123456 ' max value = 4294967290
  dim wordNumber as Word
  dim outstring as string
  wordNumber = 0
  byteNumber = 0

; ----- Main program

  GLCDCLS
  GLCDPrint 0, 0, "Great Cow Basic"
  GLCDPrint (0, 16, "Anobium 2015")


  wait 3 s
  GLCDCLS

  ' Prepare the static components of the screen
  GLCDPrint ( 0,   0, "PrintStr")                                ; Print some text
  GLCDPrint ( 64,  0, "@")                                    ; Print some more text
  GLCDPrint ( 72,  0, ChipMhz)                                   ; Print chip speed
  GLCDPrint ( 86, 0, "Mhz")                                     ; Print some text
  GLCDDrawString( 0,8,"DrawStr")                                 ; Draw some text
  box 0,0,GLCD_WIDTH-1, GLCD_HEIGHT-1                            ; Draw a box
  box GLCD_WIDTH-5, GLCD_HEIGHT-5,GLCD_WIDTH-1, GLCD_HEIGHT-1    ; Draw a box
  Circle( 44,41,15)                                              ; Draw a circle
  line 64,31,0,31                                                ; Draw a line

  DO forever
     for CCount = 31 to 127
          GLCDPrint ( 64 ,  36,  hex(longNumber_E ) )                 ; Print a HEX string
          GLCDPrint ( 76 ,  36,  hex(longNumber_U ) )                 ; Print a HEX string
          GLCDPrint ( 88 ,  36,  hex(longNumber_H ) )                 ; Print a HEX string
          GLCDPrint ( 100 ,  36, hex(longNumber   ) )                 ; Print a HEX string
          GLCDPrint ( 112 ,  36, "h" )                                ; Print a HEX string


          GLCDPrint ( 64 ,  44, pad(str(wordNumber), 5 ) )           ; Print a padded string
          GLCDPrint ( 64 ,  52, pad(str(byteNumber), 3 ) )           ; Print a padded string


          box (46,9,56,19)                                           ; Draw a Box
          GLCDDrawChar(48, 9, CCount )                               ; Draw a character
          outString = str( CCount )                                  ; Prepare a string
          GLCDDrawString(64, 9, pad(outString,3) )                   ; Draw a string

          filledbox 3,43,11,51, wordNumber                           ; Draw a filled box

          FilledCircle( 44,41,9, longNumber xor 1)                   ; Draw a filled box
          line 0,63,64,31                                            ; Draw a line

                                                                     ; Do some simple maths
          longNumber = longNumber + 7 : wordNumber = wordNumber + 3 : byteNumber++
      NEXT
  LOOP
  end

And, could you add the standard header? This will then enable it to be loaded into GCGB without messing up. So, add and edit the following:

'''A demonstration program for GCGB and GCB.
'''--------------------------------------------------------------------------------------------------------------------------------
'''This program is a simple GLCD demonstration of the '''A demonstration program for GCGB and GCB.
'''--------------------------------------------------------------------------------------------------------------------------------
'''This program is a simple GLCD demonstration of the SSD1306 GLCD capabilities.
'''This program draws lines, boxes, circles and prints strings and numbers.
'''The SSD1306 controller a small graphical OLED, suitable for a lot of various projects.
'''The display is 38*35 mm, with an active display surface of 0.96inches , and a 128*64 pixel resolution.
'''The display is easy to interface, using an I2C type of communication.
'''The GLCD is connected to the microprocessor as shown in the hardware section of this code.
'''@author  Kent
'''@licence GPL
'''@version ??
'''@date    ??
'''********************************************************************************

I will update the .h file with licensing etc but I cannot test a demo file with this specific SPI configuration. Hence, no point in me making these changes which would be untested.

If you can make these changes then send or upload a new version that would be great!

[kent_twt4]

Good catch, no reason whatsoever for the INITGLCD_SSD1306 as glcd.h handles that. Guess I'm so used to handling initialization calls in program, OR what was once commented, became uncommented?

Another stab at the GLCD demonstration program, I just added some more of the commands to previous example. Everything is printing properly.

[Anobium]

You posted the asm... lol Not the source file.

[kent_twt4]

Fixed? Oh my, the grey matter isn't performing too well today, :-)

[Anobium]

@Kent. The .h and the demo is now included in the next build. I have updated the Gold build with both files.

[kent_twt4]

Thanks much, onward and upward we go.