28128 Parallax Inc, 28128 Datasheet - Page 56

• 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

We'll modify the code so that it also displays the decimal conversion of the 8-bit binary
number. Next we'll add some more code to adjust the number to a 5 volt scale. Make sure
your circuit is constructed correctly and your programming cable and power source are
connected, then run the program.
' -----[ Title ]-----------------------------------------------------------
' Basic Analog and Digital - PL3_1R0.bs2
' Program Listing 3.1 Revision 0.
' {$STAMP BS2}
' {$PBASIC 2.5}
' -----[ Declarations ]----------------------------------------------------
adcBits
v
r
v2
v3
' -----[ Initialization ]--------------------------------------------------
CS
CLK
DataOutput
DEBUG CLS
' -----[ Main Routine ]----------------------------------------------------
DO
LOOP
' -----[ Subroutines ]-----------------------------------------------------
ADC_Data:
RETURN
Calc_Volts:
RETURN
Display:
RETURN
GOSUB ADC_Data
GOSUB Calc_Volts
GOSUB Display
HIGH CS
LOW CS
LOW CLK
PULSOUT CLK, 210
SHIFTIN DataOutput,CLK,MSBPOST,[adcBits\8]
DEBUG HOME
DEBUG "8-bit binary value:
VAR
VAR
VAR
VAR
VAR
PIN
PIN
PIN
Byte
Byte
Byte
Byte
Byte
0
1
2
", BIN8 adcBits
'Start display.