connection failed

General discussions about V-USB, our firmware-only implementation of a low speed USB device on Atmel's AVR microcontrollers
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connection failed

Post by civicoid » Sun Dec 17, 2006 1:42 pm

is there anybody out there who can help me to solve this problem ...

i built the avr-doper, seen at this site ...

i am very glad to find a programmer-solution via usb

the programmer works fine on my desktop-pc with xp-home sp2

but on my laptop, it is impossible to get a connection ...

the log file says:

Failed opening port
Returned status: Client: The com port could not be opened
Port closed
Returned status: Command succeeded

there is no firewall installed, witch could block this

please help me to use the programmer also mobile ;-)


Post by Civicoid » Mon Dec 18, 2006 10:50 am

:D Yippeyyy

it's alive ...

this great utility named sony erric**** sync station tool blocked my ports all the time ...

after uninstalling this driver my avr-doper works fine :-)

Objective Development
Objective Development
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Joined: Thu Nov 09, 2006 11:46 am

Post by christian » Mon Dec 18, 2006 12:11 pm

Implementing the CDC device class with AVR-USB is slightly outside the specs. It may therefore be unreliable on some computers. The driver you mentioned may change the USB timing and thus cause the CDC implementation to fail, although it's otherwise completely OK.

If you have a choice, I would recommend that you use AVR-Doper with avrdude in HID mode.

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