28029 Parallax Inc, 28029 Datasheet - Page 195

• Manufacturer Part Number: 28029
• Description: KIT PARTS SMART SENSORS W/TEXT
• Manufacturer: Parallax Inc

Specifications of 28029

• Accessory Type: Parts Kit
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: BASIC Stamp® or Javelin Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: 28029PAR

Here’s a third step you can use to test and verify that it works:
Re-Drawing the Background
Up to this point, all of our plots accumulated asterisks as we entered more values in the
Transmit windowpane. The net effect we want for game control is to make the asterisk
disappear from its old location and appear in its new location whenever we redefine it, to
give the appearance of one asterisk moving.
(3) Add
√
DO
DEBUG CRSRXY, x, y, "*"
Start with the original, unmodified version of PlotXYGraph.bs2, save it under
the name PlotXYGraphRecall.bs2, and try the modifications just discussed in
steps (1) through (3) above. Keep in mind that both values displayed will be in
terms of Debug Terminal coordinates. Also keep in mind that the first time
through, the old coordinates will be (0, 0) since all variables initialize to zero in
PBASIC.
Why are
When working with signed values, word variables store both the value and the sign.
At the particular place that
values that range from 0 to 12, so all we need are nibble variables.
DEBUG
xOld = x
yOld = y
DEBUG "Type X coordinate: "
DEBUG CRSRXY, 0, 10,
DEBUG CRSRXY, 0, 11,
DEBUG CRSRXY, 0, 12, "Press any Key..."
DEBUGIN temp
statements to display the current and previous values of x, y.
"Current entry:
DEC x, ",", DEC y, ")"
"Previous entry: (",
DEC xOld, ",", DEC yOld, ")"
x
and
y
words while
xOld
(",
xOld
and
and
yOld
Chapter 5: Accelerometer Gaming Basics · Page 183
yOld
are used in the program, they are only storing
are nibbles?
' <--- Add
' <--- Add
' <--- Add
' <--- Add
' <--- Modify