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replication of SX tech Ckt, give communication connection failed after download — Parallax Forums

replication of SX tech Ckt, give communication connection failed after download

jmokiejmokie Posts: 13
edited 2006-10-20 03:24 in General Discussion
Hi, new to this forum and to this micro.· Have replicated the power & SX-key ckt from SX Tech board on a board for my robot.· When trying to download program for the first time, I get a "communication connection failed" error, but it shows that the program was downloaded.· Same chip installed in the SX Tech board downloads without problem.

Any idea?
Jerry

Comments

  • Ken GraceyKen Gracey Posts: 7,403
    edited 2006-10-20 02:23
    Jerry,

    I've had a problem·similar to·this when the SX-Key is wiggling around during programming. Is the robot moving by chance while you're trying to program? However, communication errors imply the program wasn't downloaded to the chip successfully.

    Have you ever made a successful connection, or is this problem new?

    Ken Gracey
    Parallax, Inc.
  • jmokiejmokie Posts: 13
    edited 2006-10-20 03:24
    Ken
    Thanks for the quick comeback. I shot the question off too soon. I found an intermittent solder bridge on the reset line. So it was resetting all the time. Next step is to hook up the sensors & motor driver.
    Thanks again.
    Jerry
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