Objective Development Forums

Yo know, I saw that example, but at the bottom he says there's an error with it. Now that I'm looking at it again, even that error would appear to prove that the USB initializes. But I'm a little confused at one thing... why does he calibrate the internal oscillator from 16.5 down to 8.25? If I'm u...

Hmm ok. My zener are hole-mounted, and reads 3.17. Yours read 4.0. They are rated at 3.6... But this the nature of zenerdiods, they are unpredictable. But at the same time, mine reads practicle the same in both cases. Strange indeed.

This is a strange problem but I'm determined to find a solution. I have a few V-USB-based designs, two based on ATTiny25 without a crystal ("No 1" & No 2") and one with a 461 and a 12MHz crystal ("No3"). No1 & No2 has 47u and 0.1u over the supply lines. No 1 and No 2...

My devices works with Ubuntu 9.10 if connected to a hub, but not if connected directly to the USB-ports on the computer. I once saw a bug-report about that, will see if I find it again.

You might try to describe your problem a bit more. What's happening and what's not happening?

I haven't worked with HID myself, my plan for a volume control includes libusb, a potentiometer and Linux amixer.

There is a setting in usbconfig.h (I think) about "self-powered" device.
I would try to use this, and connect the USB 5V to a I/O-pin. That can then be used in the code detect if USB is connected or not.

Well I remember how much I searched for information and the hours spend to understand So I can give some answers, although the Wiki is essential reading: 1/ The Attiny25/45/85 can be used with their internal oscillator, no crystal needed. 2/ The "ADC"-pins are not just "ADC"-pins...

Hello!
No sorry, I don't have a Studio project for this. I've just used Studio to set the fuses, the rest is done with a text editor, avr-gcc and avrdude.

My goal is to create the simplest possible V-USB based device. It won't to anything, just be visible to the system as a Libusb device. May not sound too interesting, but see it as a framework for further developement. Hardware Based on a ATTiny25. Two 1N4148 in the USB power line, 100n and 10-47u ca...

To start with, I'm an AVR beginner... I've got interested in the EasyLogger and build a circuit, but only had an ATTiny25 at hand. I've tried to modify the code somewhat and removed the Led-functions, but the code is still a bit to large för the '25. avr-objcopy -j .text -j .data -O ihex main.bin ma...