help with raven usb stick(Target voltage outside range")

Go To Last Post
4 posts / 0 new
Author
Message
#1
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Hi all. I have an RZUSBSTICK which i tried to flash the new killerbee framework with avrdude. after a misspell I did to the firmware image avrdude game me reply that flashed the firmware installed but couldn't install the new one(ofc as i misspelled it, sorry i don't have screenshot) From that point light stopped working but as i saw in another thread that is probably cause there is no USB activity and I hope it's not dead. avrdude is giving me now JTAG fuse errors and I'm really anxious. So i installed ATMEL STUDIO 7 in order to install firmware and  also to try to "sense" the device to see at least if it is alive. But as you can see from the screenshot below I have an error that voltage sensed is outside limits. It is also variating a bit(0.1-0.2Volts). Any ideas??? Is it dead?

Last Edited: Tue. May 30, 2017 - 02:14 PM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 1

 

Have you done any successful programming using that connector? Did you recently install it?  Check for shorts between pins.

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Have you checked the actual supply voltages on the target board?

 

 

Top Tips:

  1. How to properly post source code - see: https://www.avrfreaks.net/comment... - also how to properly include images/pictures
  2. "Garbage" characters on a serial terminal are (almost?) invariably due to wrong baud rate - see: https://learn.sparkfun.com/tutorials/serial-communication
  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillatorhttps://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
  6. Beginner's "Getting Started" tips: https://www.avrfreaks.net/comment...
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

@dak664 yes the connector has been used many times successfully. 

@awneil I checked all supply voltages. First I began with 50 mil connectors pins(as i was afraid for short circuit as well) and respective output pins from mcu. All were variating from 0.8V to 0.9V.

Then I started at the USB supply(as it's a Chinese charger I don't trust either) and it was 4.8V. Then I moved according to schematics to the voltage regulator "LP2985A-33DBV" I suppose that's converting the 5V supply from USB to 3.3V. Well there I measured 1.1V-1.2V on the output. Should I assume there is the problem?

Please tell me I'm missing o a scenario where the regulator is not fried ...sad

Last Edited: Sat. Jun 3, 2017 - 09:04 PM