122-28176 Parallax Inc, 122-28176 Datasheet - Page 57

• Manufacturer Part Number: 122-28176
• Description: GUIDE STUDENT PROCESS CONTROL
• Manufacturer: Parallax Inc

Specifications of 122-28176

• Accessory Type: Manual
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: Propeller Education (PE) Kit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

LED
DigIn
ADC_CS
ADC_Clk
ADC_Dout
' -----[ Initialize ] -----------------------------------------------------
OUTPUT LED
PAUSE 1000
' -----[ Main Routine ]----------------------------------------------------
DO
LOOP
' -----[ Subroutines ]-----------------------------------------------------
ReadData:
RETURN
PlotData:
RETURN
Figure 3-2 shows an example test in which the threshold voltage was found to be
approximately 1.45 V. The digital trace at the top goes high and low as the analog
voltage goes above or below the threshold voltage.
GOSUB ReadData
LED = DigIn
GOSUB PlotData
PAUSE 500
LOW ADC_CS
DigDataIn = DigIn
SHIFTIN ADC_Dout, ADC_Clk, MSBPOST,[ADC_DataIn\9] ' Clock in data from ADC
HIGH ADC_CS
DEBUG IBIN DigDataIn,CR ' Plot indicated binary value
DEBUG "[",
√
√
√
√
√
Close the Debug Terminal.
Load StampPlot with the macro sic_pc_data_monitoring.spm
Connect and plot.
Adjust the potentiometer. The analog voltage and plotted value should change
accordingly.
HIGH/LOW status of P8.
Note the voltage at which the input P8 changes between HIGH and LOW logic
levels. This is the threshold voltage.
DEC ADC_DataIn, ' Analog data
",*,.0196]",CR
PIN 0
PIN 8
PIN 13
PIN 14
PIN 15
LED
' Read ADC 0831
' Enable chip
' Read digital input value to coincide with ADC read
' Disable ADC
' Send data to StampPlot
' Bracket for StampPlot math operation
' Convert ADC value to voltage by StampPlot
' LED output pin
' Digital input pin monitored
' ADC Chip Select pin
' ADC Clock pin
' ADC Data output
' Set LED as output
' Allow connection to stabilize
1
, on the BASIC Stamp output pin P0, indicates the