28029 Parallax Inc, 28029 Datasheet - Page 200

• 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

Page 188 · Smart Sensors and Applications
Animation and Redrawing the Background
Here is an example of something you can do if you use individual characters, but it won't
work if you try to redraw the entire display with a
ACTIVITY #3: TILT THE BUBBLE GRAPH
This activity combines the graphics concepts introduced in Activities #1 and #2 with the
accelerometer tilt measurement techniques introduced in Chapter 3. The result is an
asterisk “bubble” that illustrates the movement of the heated gas pocket inside the
MX2125’s chamber. Figure 5-11 on the next page shows what the Debug Terminal in
this activity displays when the accelerometer is tilted up and to the left.
Parts Required
(2) 3-inch Jumper Wires
(2) Resistors – 220 Ω
(1) Memsic MX2125 Dual-Axis Accelerometer
√
√
√
√
Save EepromBackgroundRefresh.bs2 as ExampleAnimation.bs2.
Replace the Main Routine in the program with the one shown here.
Run it and observe the effect.
DO
LOOP
Connect the accelerometer module using Figure 5-10 as your guide.
FOR y = 0 TO 6
NEXT
FOR temp = 1 TO 2
NEXT
FOR x = 0 TO 12
NEXT
IF (temp.BIT0 = 1) THEN
ELSE
ENDIF
PAUSE 50
DEBUG CRSRXY, x, y, "*"
index = (14 * yOld) + xOld + 1
READ index, character
DEBUG CRSRXY, xOld, yOld, character
xOld = x
yOld = y
DEBUG
command.