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Hello, I have a Microcore11 microcontroller module from http://www.technologicalarts.com . I have been extremely pleased with it's performance over the 2 years which I have had it. I mainly use it for developing so it is reprogrammed quite often. I have come across a problem that I cannot seem to solve. I wrote a program about a month ago and downloaded it to the MCU; it worked fine then with no problems at all. Today I took the MCU out of it's static protection bag and plugged it into my breadboard, as I have done a hundred times, I proceeded to apply power to the board and nothing happened. The program did not work! So I thought that I would download the same program to the MCU to see if that would solve my problem, and to my dismay it did not. What did happen was the LED that is connected to PA6 of the MCU would blink about once every half second after reset, and it did not respond to any of my commands from my VB program. I knew that I had not written anything in the code that would make that light blink on and off like it was so naturally I went into troubleshooting mode. I downloaded the sample application provided by Technological arts only to find the same problem! This is code that I have not touched; how could this be malfunctioning so much? So now I am wondering how could this happen? Any suggestions would be great.LF ---------------------------------

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In a message dated 8/24/04 6:27:17 P.M. Eastern Daylight Time, writes: I downloaded the sample application provided by Technological arts only to find the same problem! ====================================== Do you use the tech arts microload program? I have a microcore.... to load a program, you must flip wr prot sw off, flip boot/run sw to boot, right? Maybe the serial port on your pc has gotten messed up... run a terminal prog and short 2 to 3 and see if it self echos..... [Non-text portions of this message have been removed]

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I found the Problem!!! Boy am I lucky too! I had been doing some soldering at my bench earlier yesterday, and apparently a tiny piece, about the size of a grain of salt, was stuck to two of the middle pins of the HC373 chip. Somehow that made the LED blink on and off. I am fortunate that this did not really mess up the MCU. Yes I do use the Batch file to download the program; I have downloaded literally thousands of programs and never had a problem. Thanks for the help though. I am going to keep this MCU board completely consealed from the world when I am not using it. It was inside the static protection bag and everything, but the bag was not fully closed. LF --- In , BobGardner@a... wrote: > > In a message dated 8/24/04 6:27:17 P.M. Eastern Daylight Time, > odddooo1@y... writes: > > I downloaded the sample application provided by Technological arts only to > find the same problem! > ====================================== > Do you use the tech arts microload program? I have a microcore.... to load a > program, you must flip wr prot sw off, flip boot/run sw to boot, right? Maybe > the serial port on your pc has gotten messed up... run a terminal prog and > short 2 to 3 and see if it self echos..... > [Non-text portions of this message have been removed]

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