Objective Development Forums

... and you will also need better ADC ... The ATMega ADC are not fast enough for such application.

It must be something else. My own project runs for days without problems.
Is the ATTiny85 using internal oscilator or a crystal ?
Maybe try another chip such atmega328 ...

Very good analysis !

The host appetite described in the blog could also probably explains problems I’ve got with CDC-ACM …
( see viewtopic.php?f=8&t=8838 )
I will probably plug a Saleae logic analyser to confirm that)

Did you got chance to try it with another computer, because it is maybe your computer that has a ground problem. (my 2 cents)

You can maybetry the HIDSerialMonitor client provided in the package from https://github.com/rayshobby/hid-serial
It is a HID client in Java, I didn't tried it under Windows, but it helped me to troubleshoot my HID device under Linux.

Hi Cube, Unfortunately, I don't have much more idea to suggest... Or, maybe this little one : Try to use the HIDSerialMonitor client provided in this package m. (When I experimented HID on my Linux host to write Kernel Driver, I've used that tool to do diagnostics) You can also compare its firmware ...

Hi Cube,

I don't see any problem with your schematic and usbconfig.h.
But why are you using timer to do the polling ? Did you have tried with an infinite loop which call the poll function ?

Hi,

I've found this thread ...

viewtopic.php?f=8&t=1030

Is this still true that we have to recompile Linux kernel driver to make CDC-ACM working fine even after more than 5 years ?

Hi blargg, Glad to see your feedback that it is suppose to work. I presume you didn't have to do any changes to the original package ? Unfortunately, it still doesn't work for me. (I'm running 12.04 too, so it should not be a driver issue.) I've ran your test script, AVR is receiving string properly...

Hi, I'm trying to implement a CDC-ACM (CDC-232) using V-USB on a small atmega328p board. I've wrote my code inspired by cdc232.2011-06-24 archive from m. It works fine in one direction but not in the other ! From gtkterm, I can send characters to the atmega328, and it is receiving it properly in the...