Objective Development Forums

usbasp and an Intel Mac w/ OS X (device not recognized)

2007-12-01T20:20:48+02:00

I have reboot the laptop and It's Ok now.

Thanks for help.

Statistics: Posted by Guest — Sat Dec 01, 2007 8:20 pm

usbasp and an Intel Mac w/ OS X (device not recognized)

2007-12-01T18:47:05+02:00

Thanks,

I have changed some components on my board and now it work.
(I have added two zener of 3,6V and changed input filter to 2.2kOhms and 4,7UF)

But now ... it's my USB to serial converter that don't want to work.

I have tried the command :
rombook:~ rom1$ tail -f /var/log/system.log
Dec 1 17:43:29 RomBook kernel[0]: USBF: 23820.140 AppleUSBUHCI[0x3863000]::UIMCheckForTimeouts Too many loops around
Dec 1 17:43:30 RomBook kernel[0]: USBF: 23821.140 AppleUSBUHCI[0x3863000]::UIMCheckForTimeouts Too many loops around
Dec 1 17:43:31 RomBook kernel[0]: USBF: 23822.140 AppleUSBUHCI[0x3863000]::UIMCheckForTimeouts Too many loops around

and so more.

Statistics: Posted by Guest — Sat Dec 01, 2007 6:47 pm

usbasp and an Intel Mac w/ OS X (device not recognized)

2007-12-01T13:40:15+02:00

Before you connect the programmer, please run the following command in a Terminal window:

tail -f /var/log/system.log

Then connect the device and watch the messages in the Terminal window. This may provide more information.

Statistics: Posted by christian — Sat Dec 01, 2007 1:40 pm

usbasp and an Intel Mac w/ OS X (device not recognized)

2007-12-01T12:29:04+02:00

Hello,

I'm a student with an Intel MacBook. And it don't recognise my usbasp too.

I have nothing in "information system" on mac os.

board is immediately recognised on my windows laptop.

And when usbasp is connected, i'm feeling that mac os is lagging. and usb port seems hot.

does anyone had same problem ?

Statistics: Posted by Guest — Sat Dec 01, 2007 12:29 pm

usbasp and an Intel Mac w/ OS X (device not recognized)

2007-08-22T13:50:06+02:00

Well, I haven't been able to get ahold of a usb hub, but thanks for the suggestion. I'll be home soon, and back to my desktop. Things should be fine from there

andrew

Statistics: Posted by chardson — Wed Aug 22, 2007 1:50 pm

usbasp and an Intel Mac w/ OS X (device not recognized)

2007-08-13T23:06:02+02:00

No, I don't have one since I'm far from home for a while longer. I'll see if my coworkers have anything. I'm desperate, I'm losing precious hacking time! If only I could live in my office...

Statistics: Posted by chardson — Mon Aug 13, 2007 11:06 pm

usbasp and an Intel Mac w/ OS X (device not recognized)

2007-08-13T12:32:34+02:00

No, none that I know of. Have you tried a USB 2.0 hub between the host and the device? If that works, it's very likely an electrical problem.

Statistics: Posted by christian — Mon Aug 13, 2007 12:32 pm

usbasp and an Intel Mac w/ OS X (device not recognized)

2007-08-11T14:19:43+02:00

I connected the zeners (3.6V as in the original usbasp schematic), but to no avail. Could it be a OSX patch that caused the problem?

Statistics: Posted by chardson — Sat Aug 11, 2007 2:19 pm

usbasp and an Intel Mac w/ OS X (device not recognized)

2007-08-09T19:34:40+02:00

I see. I will try and run town to the radio store tomorrow (I have to leave work early). The multimeter claims the voltage difference between D+ and D- is 3.87 V, which I would expect to be below peak, so zeners are a good idea.

Thanks for your reply (a lot). It probably wouldn't have crossed my mind (I didn't know why they would be there when I looked at the original schematic). If this does fix it, I might suggest to T.Fischl that he put a note in the readme, or add a noe in the designs without zeners.

Andrew

Statistics: Posted by chardson — Thu Aug 09, 2007 7:34 pm

usbasp and an Intel Mac w/ OS X (device not recognized)

2007-08-08T16:07:28+02:00

AVR-USB devices work well on my MacBook Pro / Intel, even without zener diodes in D+ and D-.

If you have omitted the zener diodes, please try adding them. Some host controllers don't tolerate 5 V levels, although many hosts do tolerate them.

Statistics: Posted by christian — Wed Aug 08, 2007 4:07 pm