32305 Parallax Inc, 32305 Datasheet - Page 11

• Manufacturer Part Number: 32305
• Description: KIT EDUCATION PROPELLER
• Manufacturer: Parallax Inc
• Series: Propeller™r
• Type: MCUr

Specifications of 32305

• Contents: Propeller DIP Plus Kit, Prop Plug, PE Kit Project Parts, Breadboards and Storage Box
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: P8X32A
• For Use With: 130-32000 - KIT PROPELLER EDU PROJECT PARTS130-32305 - KIT PROPELLER DIP PLUS122-32000 - MANUAL PROPELLER
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

An Empty Program for the Next Circuit
Whenever you change a prototype circuit, it’s a good idea to load a program that doesn’t do anything
to the I/O pins into the propeller. This reduces the risk of the Propeller chip inadvertently sending a
high signal to a circuit that is sending a low signal, or visa versa. In either case, if no resistor is in
series, it could result in a damaged Propeller chip, or a damaged circuit, or both. Loading an “empty”
program now in anticipation of building new circuits in the future will help protect your Propeller
chip. Ending your experiments this way is a good habit.
'' File: DoNothing.spin
PUB main
Troubleshooting
Here are a list of symptoms and possible causes.
(1) If there is no apparent communication when you plug the Propeller Plug into the PC’s USB port,
(2) If the PE Platform’s power LED did not light when the battery was connected:
(3) If the voltage across the power rails is not 3.3 V, the most common culprits are faulty wiring and
(4) If the Power LED does not light when you plug the battery in after socketing the Propeller chip,
(5) If the Power LED does not glow faintly when you connect the Propeller Plug to the 4-pin header,
(6) Common causes of the “No Propeller Chip found…” message are:
follow the USB link on the Parallax home page. It will take you to the Installing USB Drivers
Page. If the steps on that page don’t fix the problem, follow the Troubleshooting link at the
bottom of that web page.
a faulty meter. If your meter is a lesser-quality model or has been subject to heavy use by other
students, check it against a known voltage before trusting its measurements. Assuming the
voltmeter’s measurements are correct, check wiring, part placement, and part orientation.
check for wiring errors to its pins. If a wire terminates at a row that is shared with a Propeller
chip I/O pin, it’s a prime suspect.
double-check the wiring of the header. The header should be placed in (A, 1) through (A, 4). The
TX pin of the Propeller Plug, (A, 2) must be connected to P31 of the Propeller chip, which is
accomplished with the jumper wire connecting (C, 2) and (C, 11).
Enter and run this program:
a. The LED may be plugged in backwards. Check to make sure the cathode is connected to
b. The battery leads may be plugged into the breadboard backwards. The battery’s +
c. There could be a wiring mistake causing a short circuit from one of the supply voltages to
a. Battery disconnected. Connect the battery.
b. Propeller Plug plugged in upside down. The parts side of the Propeller plug should be
c. Propeller Plug not plugged in to USB port.
Copyright © Parallax Inc. ● Application Note Title and Version ● 11/2/2006 ● Page 11 of 12
the resistor and the anode is connected to the 3.3 V supply rail. In other words, the pin
coming out by the flat spot at the base of the LED’s round plastic housing should be
plugged into (L, 10), and the other pin should be connected to (RED, 10).
terminal should connect to (L, 1) and the – terminal should connect to (L, 2).
ground. If you don’t have a multimeter, start visually checking your wiring again. With
a multimeter, you can check the resistance between the battery’s negative terminal, and
the 3 V power rail. Repeat for 5 V regulated output (G, 3) and for the battery inputs (G,
1). If any of these shows less than 1 Ω, that supply voltage has been shorted to ground.
facing up, and the logo side with the socket labels should be facing the breadboard.
' Empty main method