Objective Development Forums

2k may be tight, but if it does not waste memory, it might suffice.

I have not seen a single upgrade on Windows (or any other major OS) where the memory consumption was actually decreased I think the delay in bootLoaderInit() is not absolutely required, it should work without it. And as a bonus, the next driver release will even have a couple of bytes less when comp...

Clock settings are done by setting fuse values. And it's impossible to change fuse values from within the firmware. Maybe the chip is blown, not bricked (and not stoned...). I therefore suspect a severe hardware problem. Oscillator calibration is only required if you run from the RC oscillator, not ...

You can implement a virtual COM port, but you need your own drivers on the Windows side. The big advantage of CDC mode is that drivers are already included with Windows. An example for an application layer driver based on libusb-win32 can be found in AVR-Doper. The "avrdebug" tool sends to...

You can also simply delete the call to the checksize script.

The fuse values depend on the chip you use. See the examples in the latest version of the driver (http://www.obdev.at/products/avrusb/download.html) for example values and more info. The fuse values can be found in the Makefile.

PowerSwitch is a custom class device. You should get a "new hardware found" dialog on Windows. Please download the newest version of the driver from m. It contains some examples which are less complex than PowerSwitch and they should run on almost any AVR with only very little changes. Wha...

You need to set the programmer type for avrdude with the "-c" option. Try



for a list of programmers. It's probably avrisp2 or avrisp.

If you really want a USB device (not a host), then this should be possible. You MUST make sure that interrupts are never disabled for longer than a couple of CPU instructions. This means that your SPI interrupt routine must re-enable all interrupts (sei instruction) before doing anything else, even ...

Use _delay_ms() from util/delay.h as in the latest examples included in the new avr-usb driver package. If it does not fit into 2k, upgrade to the latest driver, this version should save enough bytes so that it fits. If it still does not fit, consider using gcc 3 instead of gcc 4, it compiles smalle...

In usbFunctionSetup(), you receive the setup command, not the data sent to the device. You must implement usbFunctionWrite() to receive the data part. See the Automator example for how this is done in a HID compliant way.

The source can be compiled for the Mega8 as well, just change the target device and (optionally) the clock rate in Makefile.

You can test your hardware and fuse values with Thomas Fischl's original firmware. If that works, the hardware is OK. I know that I claimed support for USBasp hardware. This is reasonable since there are only very little changes with respect to metaboard. But it's still possible to make errors, even...

Sorry, I think I misunderstood your original posting: You're trying to run the AVR-Doper firmware on USBasp hardware and it does not work, right? In this case you don't need libusb-win32, of course. I must admit that I have not tested AVR-Doper on USBasp hardware because I don't have one available, ...

Have you enabled the watchdog? Please note that newer devices don't reset the watchdog during a CPU reset. Once it is enabled, it stays enabled until explicitly disabled. usbInit() can't crash, it just initializes some registers. Maybe sei() causes the crash, an interrupt may be enabled which has no...

You need avrdude and libusb-win32 for USBasp. Have you installed libusb-win32?