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AN ELECTRONIC LITESHOW DISPLAY

Part 2: Controlling the Lights with Software

by James Antonakos

Start ý Recap ý Software Initialization ý Building a Bit Pattern ý Outputting Data to the Display ý Scrolling the Display Pattern ý Handling Network Messages ý Other Uses ý Sources and PDF

SCROLLING THE DISPLAY PATTERN

The display pattern is scrolled from right to left by transferring data from the display bitmap to the display, delaying for a short period of time (typically 0.10 s), and then repeating with the transfer starting in the next column of the bitmap. Figure 3 illustrates this process. Bits from the display bitmap are copied into a temporary display buffer accessed by the DisplayBitmap() function.

Figure 3ýScrolling the display message is done by copying data from the bitmap buffer to the display and then moving the copy window one column to the right.

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