EEPROM PropStick Issues

sstone86

While in the process of learning how to use the Propeller I think I managed to damage the EEPROM on my PropStick. It all started happening after I mistakenly wired some push button inputs on pins 31-28. Now every time I try to run my program, it keeps resetting every 2-3 seconds. This issue is temporarily fixed when I load the program into the RAM, but when I turn it off and on, the issue comes back(Yes I did load the code into the EEPROM with F11).

Did I really damage the EEPROM? I used 10k resistors on the push buttons with a 3.3v source. The Propeller Education Kit box insert shows these as valid pins, without showing reference to them being for the EEPROM and Prop Plug. I had to look in the book to find that out; but that's also a diagram for the DIP-40 version.

If so, can Parallax replace this for me(for a fee of course if no warranty applies)? Or do I have to practice my SMD soldering skills?

Mike Green

It's hard to damage the EEPROM with voltages within its normal range (0-3.3V), particularly with 10K pullup resistors and a pushbutton to ground. The Propeller pins (28-31) are even harder to damage. Make sure you've got everything external disconnected from pins 28-29. What happens when you download your program to EEPROM? What program are you using? Usually the Propeller Tool will get an error when it tries to program the EEPROM if there's a problem with it.

Parallax's support people will either help you get this to work or generally will replace the PropStick if you call them on Monday.

Post Edited (Mike Green) : 8/9/2009 7:42:50 PM GMT

sstone86

Thanks for the reply,

It loads into the EEPROM fine, no errors. It even runs the program and works. Its when I disconnect power completely and reset, it starts to bug out. I'm going to try some very simple LED blink programs from the book to confirm its not a programming error(which would be weird because it works fine though the RAM)