In SX Microcontrollers, SX/B Compiler and SX-Key Tool, tdg8934 wrote:

Let me get back to the original issue that using my routine:

[code]

DISPLAY_RGB1:        
  FOR tmpB1 = 0 TO 255 step 8
    tmpB2 = tmpB1
    tmpB3 = 0
    
    LOW ChipSel
    DELAY_MS 1
    [b]DO WHILE tmpB3 < 64    'or use    DO WHILE tmpB3 < 128    for 2 displays...[/b]
     
      READINC Ltr_Space + tmpB2, tmpB4                                 
      tmpB4 = tmpB4 * color
        SHIFTOUT DataIn, Clock, MSBFIRST, tmpB4
      INC tmpB3
    LOOP
        DELAY_MS 1
        HIGH ChipSel
      DELAY_MS 100
  NEXT
  RETURN
 
[/code]

I can still marquee scroll across from right to left on 1 SPI LED display. The problem is when I connect 2 displays which requires the "DO WHILE tmpB3 < 64" to get set to a higher value like 128. This is when the "ghost" imaging appears offset from the correct scrolling. So I am saying that I can scroll correctly across 2 displays with "DO WHILE tmpB3 < 128" - BUT I also get the "ghost" imaging of the same scrolling faintly offset in the background making the regular scrolling unusable across 2 displays.

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