28029 Parallax Inc, 28029 Datasheet - Page 40

• 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 28 · Smart Sensors and Applications
Example Program - TestScrollingSubroutine.bs2
' -----[ Title ]--------------------------------------------------------------
' Smart Sensors and Applications - TestScrollingSubroutine.bs2
' Scroll a text message across a four character wide window in the LCD.
' {$STAMP BS2}
' {$PBASIC 2.5}
' -----[ DATA Directives ]----------------------------------------------------
Message1
Message2
Message3
Message4
' -----[ I/O Definitions ]----------------------------------------------------
LcdPin
' -----[ Constants ]----------------------------------------------------------
T9600
LcdCls
LcdCr
LcdOff
LcdOn
Line0
Line1
TimeOn
TimeOff
' -----[ Variables ]----------------------------------------------------------
' Functional variables for Scroll_Message subroutine.
cursorStart
head
tail
pointer
character
√
√
√
Review the code blocks in the Main Routine of the program and predict how
wide the scrolling window will be, what text will be displayed, and how many
characters at a time the message will shift.
Enter, save, and run TestScrollingSubroutine.bs2.
Compare your predictions to what actually occurred and reconcile any
differences.
DATA @ 2, "Message "
DATA
DATA
DATA
PIN
CON
CON
CON
CON
CON
CON
CON
CON
CON
VAR
VAR
VAR
VAR
VAR
"again"
"Larger message, going faster..."
14
84
12
13
21
22
128
148
250
0
Byte
Byte
Byte
Byte
Byte
' BASIC Stamp Directive
' PBASIC Directive
' LCD I/O pin
' True, 8-bits, no parity, 9600
' Form feed -> clear screen
' Carriage return
' Turns display off
' Turns display on
' Line 0, character 0
' Line 1, character 0
' Character on time
' Character fade time
' First character location
' Start of displayed text
' End of displayed text
' EEPROM address pointer
' Stores a character