Objective Development Forums2009-09-17T21:33:34+02:00https://forums.obdev.at/app.php/feed/topic/32802009-09-17T21:33:34+02:002009-09-17T21:33:34+02:00https://forums.obdev.at/viewtopic.php?t=3280&p=10998#p10998<![CDATA[AVR crashed and reboots]]> I have a problem with the V-USB lib. I am especially interested in HID and boot-loader programs.
My hardware setup: -Atmega644 @ 12Mhz; 4,2V (it's running stabile) -USB pins pulled down with 3V6 Z-diodes according to the specs (D2, D3)
I did nothing else but downloading different projects and reconfiguring them for my hardware. But nothing seems to work. The controller simply always crashes and reboots for the boot-loader apps. I have absolutely no clue why. Syslog always reports:
usb 1-6.1.3: new low speed USB device using ehci_hcd and address XXX
I tried also two HID programs. Syslog recognizes both correctly as HID keyboards including the correct additional information of the programmers. Therefore I think the hardware is set up correctly. But as so as I tried to submit a char it crashes and reboots again. (Only once I was able to do so, but only for exactly one char)
Is their a problem if I use a Atmega644@12Mhz? Because I only found one app using an Atmega644. But for this app the controller is clocked with 20Mhz. If I recompile it with 12Mhz and it crashed. (I cannot try it with a 20Mhz crystal)
What am I doing wrong? Please help me. I am getting slightly mad. Juergen