28128 Parallax Inc, 28128 Datasheet - Page 41

• 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

Reprogramming to Receive Serial Data
Enter Program Listing 2.2 into the BASIC Stamp Editor, and save it under the name
PL2_2R0.bs2.
' Basic Analog and Digital - PL2_2R0.bs2
' Program Listing 2.2 Revision 0.
' {$STAMP BS2}
' {$PBASIC 2.5}
n
d
INPUT 0
INPUT 1
FOR n = 1 TO 4
NEXT
DEBUG CR, CR, "Done shifting.", CR, CR
DEBUG "Decimal value: ", DEC2 d, CR, CR
The Output
The Debug Terminal will initially show a blank screen when you run the program.
Follow these instructions carefully to send the synchronous, serial data. First, press and
hold the right button. Then press and release the left button. The output should look like
Figure 2-5 below.
DO
LOOP UNTIL IN1=1
DO
LOOP UNTIL IN1=0
d = d << 1
d = d + IN0
DEBUG HOME, "Shifting in bits: ", BIN4 d
'Wait for high
'Wait for low
VAR
VAR
Nib
Nib