Trouble with AVR Dragon, It can read the device ID only once!

Discussion in 'Embedded Systems and Microcontrollers' started by francesco_rossi, May 31, 2013.

  1. francesco_rossi

    Thread Starter New Member

    May 31, 2013
    Hi all,

    I have an avr dragon connected via ISP to an atmega32a mounted in a breadboard. For now I don't pretend more than to read the device id. I'm using AVRStudio 6.0 to comunicate with the microcontroller and I have a strange problem. The first time I try to read the device id all goes fine but the next time it fails...I have to switch off/on the supply to read again the ID but only for one time...

    I have a 1uF bypass capacitors between both Vcc-GND and Avcc-GND and the ISP cable lenght is very short, about 100mm.

    I don't know what to do to solve the problem, if someone has any advice I'll appreciate it very much.