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V-USB 2012-12-06

• Define a separate type for usbMsgPtr so that projects using a tiny memory model can define it to an 8 bit type in usbconfig.h. This change also saves a couple of bytes when using a scalar 16 bit type.
• Inserted "const" keyword for all PROGMEM declarations because new GCC requires it.
• Fixed problem with dependence of usbportability.h on usbconfig.h. This problem occurred with IAR CC only.

V-USB 2012-01-09

• Fixed bug in usbDriverSetup() which prevented descriptor sizes above 255 bytes.
• Fixed wrong hex value for some IDs in USB-IDs-for-free.txt.

V-USB 2010-07-15

• Use vector INT0_vect instead of SIG_INTERRUPT0 if defined. This makes V-USB compatible with the new "p" suffix devices (e.g. ATMega328p).
• USB_CFG_CLOCK_KHZ setting is now required in usbconfig.h (no default anymore).
• New option USB_CFG_DRIVER_FLASH_PAGE allows boot loaders on devices with more than 64 kB flash.
• Other minor fixes.

V-USB 2009-08-22

• Fixed a bug in the 12.8 MHz module: End Of Packet detection was made in the center between bit 0 and 1 of each byte. This is where the data lines are expected to change and the sampled data may therefore be unstable. We therefore check EOP only if bits 0 and 1 have both been read as 0 on D-.
• Fixed a bit-stuffing problem in the 16 MHz module: If bit 6 was stuffed, the unstuffing code in the receiver routine was ca. 1 cycle too long. If multiple bytes had the unstuffing in bit 6, the error summed up until the receiver was out of sync.
• Updated bits in Configuration Descriptor’s bmAttributes according to USB 1.1 (in particular bit 7, it is a must-be-set bit now).
• Included option for faster CRC routine (thanks to Sławomir Fraś for the code).
• Improved documentation about USB-IDs.

V-USB 2009-04-15

• Hid-mouse example used settings from hid-data example, fixed that.
• Renamed project to V-USB due to a trademark issue with Atmel®.

V-USB 2009-03-23

• Integrated a module with CRC checks at 18 MHz by Lukas Schrittwieser.
• Removed libusb-win32 dependency for hid-data example in Makefile.windows. It was never required and confused many people.
• Added extern uchar usbRxToken to usbdrv.h.

V-USB 2008-11-26

• Fixed assembler code in example code osctune.h. Previous version did not work when the OSCCAL register was outside the I/O addressable range.
• Code can now be licensed under GPL version 3 or version 2, it’s your choice.

V-USB 2008-10-22

• Fixed bug in libs-host/hiddata.c function usbhidGetReport().
• Fixed bug with long transfers (above 254 bytes total).
• AVR’s internal RC oscillator is now supported at 12.8 MHz.
• Added hook to SOF code so that oscillator can be tuned to USB frame clock.
• Added example code for oscillator tuning to libs-device.
• New options USB_CFG_CHECK_DATA_TOGGLING and USB_CFG_SUPPRESS_INTR_CODE.
• Use control transfer recipient "device" instead of "interface" in HID examples.
• Fixed USB Reset detection for high speed CPU clocks.
• Added timeout to waitForJ loop. Helps preventing unexpected hangs.
• Code size optimizations.

V-USB 2008-05-13

• New configuration option USB_CFG_LONG_TRANSFERS for transfer sizes above 254 bytes.
• Added support for 20 MHz CPU clock, the assembler module was contributed by Jeroen Benschop.
• Better code size optimization with gcc 4.
• Restructured usbdrv.c so that it is easier to read and understand.
• Built-in configuration descriptor allows up to two interrupt-in endpoints now.

V-USB 2008-04-18

• USB_INITIAL_DATATOKEN defaults to USBPID_DATA1 now, which means that we begin interrupts transfers with USBPID_DATA0.
• Changed defaults in usbconfig-prototype.h (is now an example for a custom class device).
• Added free USB VID/PID pair for MIDI class devices.
• Restructured AVR-USB as separate package, not part of PowerSwitch anymore.

V-USB 2008-02-28

• Added hooks so that application firmware can be informed about USB reset and address assignment.
• Added optional routine usbMeasureFrameLength() which can be used to calibrate the AVR’s internal RC oscillator based on the USB frame time.

V-USB 2008-02-16

• Fixed a bug in 16.5 MHz module where interrupt handler modified a register before it was pushed. This bug was introduced with code restructuring in version 2007-12-01.
• Optimized CRC computation (saved a couple of bytes in code size).

V-USB 2008-02-05

• Fixed bug in 15 and 16 MHz module which caused USB enumeration to fail on some hosts.

V-USB 2008-01-21

• Renamed all include-only assembler files from *.S to *.inc so that users don’t accidentally link them.
• Distribute leap bits more evenly in transmit loop of 16 MHz module.

Older Releases

For changes in oder versions please see the PowerSwitch project.