28128 Parallax Inc, 28128 Datasheet - Page 33

• Manufacturer Part Number: 28128
• Description: KIT BASIC ANALOG/DIGI PARTS ONLY
• Manufacturer: Parallax Inc

Specifications of 28128

• Accessory Type: ADC, DAC
• Product: Microcontroller Accessories
• For Use With/related Products: BASIC Stamp® 2 and Board of Education
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

' Basic Analog and Digital - PL2_1R0.bs2
' Program Listing 2.1 Revision 0.
' {$STAMP BS2}
' {$PBASIC 2.5}
a
b
d
INPUT 0
INPUT 1
OUTPUT 4
OUTPUT 5
DEBUG CLS
DO
LOOP
The Output
Here's how the program should work. When no pushbuttons are pressed, the Debug
Terminal output should match Figure 2-4, and both LEDs should be off. Try pressing the
right button (in Figure 2-3). Did the right LED light up? Did the state of P0 in the Debug
Terminal change to 1? Is the decimal equivalent 1? If so, it looks like your circuit and
program are working well so far.
a = IN0
b = IN1
OUT4 = b
OUT5 = a
d = (2*b) + (1*a)
DEBUG HOME, "State of pin P0 is ", BIN a, CR
DEBUG "State of pin P1 is ", BIN B, CR, CR
DEBUG "2-bit binary number: ", CR
DEBUG "P1
DEBUG " ", BIN b, "
DEBUG "Decimal equivalent: ", DEC1 d, CR
VAR
VAR
VAR
P0", CR
Bit
Bit
Nib
", BIN a, CR, CR