309 lines
14 KiB
Plaintext
309 lines
14 KiB
Plaintext
This file documents changes in the firmware-only USB driver for atmel's AVR
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microcontrollers. New entries are always appended to the end of the file.
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Scroll down to the bottom to see the most recent changes.
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2005-04-01:
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- Implemented endpoint 1 as interrupt-in endpoint.
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- Moved all configuration options to usbconfig.h which is not part of the
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driver.
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- Changed interface for usbVendorSetup().
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- Fixed compatibility with ATMega8 device.
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- Various minor optimizations.
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2005-04-11:
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- Changed interface to application: Use usbFunctionSetup(), usbFunctionRead()
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and usbFunctionWrite() now. Added configuration options to choose which
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of these functions to compile in.
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- Assembler module delivers receive data non-inverted now.
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- Made register and bit names compatible with more AVR devices.
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2005-05-03:
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- Allow address of usbRxBuf on any memory page as long as the buffer does
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not cross 256 byte page boundaries.
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- Better device compatibility: works with Mega88 now.
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- Code optimization in debugging module.
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- Documentation updates.
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2006-01-02:
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- Added (free) default Vendor- and Product-IDs bought from voti.nl.
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- Added USBID-License.txt file which defines the rules for using the free
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shared VID/PID pair.
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- Added Readme.txt to the usbdrv directory which clarifies administrative
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issues.
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2006-01-25:
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- Added "configured state" to become more standards compliant.
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- Added "HALT" state for interrupt endpoint.
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- Driver passes the "USB Command Verifier" test from usb.org now.
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- Made "serial number" a configuration option.
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- Minor optimizations, we now recommend compiler option "-Os" for best
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results.
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- Added a version number to usbdrv.h
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2006-02-03:
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- New configuration variable USB_BUFFER_SECTION for the memory section where
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the USB rx buffer will go. This defaults to ".bss" if not defined. Since
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this buffer MUST NOT cross 256 byte pages (not even touch a page at the
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end), the user may want to pass a linker option similar to
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"-Wl,--section-start=.mybuffer=0x800060".
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- Provide structure for usbRequest_t.
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- New defines for USB constants.
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- Prepared for HID implementations.
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- Increased data size limit for interrupt transfers to 8 bytes.
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- New macro usbInterruptIsReady() to query interrupt buffer state.
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2006-02-18:
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- Ensure that the data token which is sent as an ack to an OUT transfer is
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always zero sized. This fixes a bug where the host reports an error after
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sending an out transfer to the device, although all data arrived at the
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device.
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- Updated docs in usbdrv.h to reflect changed API in usbFunctionWrite().
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* Release 2006-02-20
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- Give a compiler warning when compiling with debugging turned on.
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- Added Oleg Semyonov's changes for IAR-cc compatibility.
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- Added new (optional) functions usbDeviceConnect() and usbDeviceDisconnect()
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(also thanks to Oleg!).
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- Rearranged tests in usbPoll() to save a couple of instructions in the most
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likely case that no actions are pending.
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- We need a delay between the SET ADDRESS request until the new address
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becomes active. This delay was handled in usbPoll() until now. Since the
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spec says that the delay must not exceed 2ms, previous versions required
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aggressive polling during the enumeration phase. We have now moved the
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handling of the delay into the interrupt routine.
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- We must not reply with NAK to a SETUP transaction. We can only achieve this
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by making sure that the rx buffer is empty when SETUP tokens are expected.
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We therefore don't pass zero sized data packets from the status phase of
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a transfer to usbPoll(). This change MAY cause troubles if you rely on
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receiving a less than 8 bytes long packet in usbFunctionWrite() to
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identify the end of a transfer. usbFunctionWrite() will NEVER be called
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with a zero length.
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* Release 2006-03-14
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- Improved IAR C support: tiny memory model, more devices
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- Added template usbconfig.h file under the name usbconfig-prototype.h
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* Release 2006-03-26
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- Added provision for one more interrupt-in endpoint (endpoint 3).
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- Added provision for one interrupt-out endpoint (endpoint 1).
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- Added flowcontrol macros for USB.
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- Added provision for custom configuration descriptor.
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- Allow ANY two port bits for D+ and D-.
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- Merged (optional) receive endpoint number into global usbRxToken variable.
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- Use USB_CFG_IOPORTNAME instead of USB_CFG_IOPORT. We now construct the
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variable name from the single port letter instead of computing the address
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of related ports from the output-port address.
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* Release 2006-06-26
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- Updated documentation in usbdrv.h and usbconfig-prototype.h to reflect the
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new features.
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- Removed "#warning" directives because IAR does not understand them. Use
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unused static variables instead to generate a warning.
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- Do not include <avr/io.h> when compiling with IAR.
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- Introduced USB_CFG_DESCR_PROPS_* in usbconfig.h to configure how each
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USB descriptor should be handled. It is now possible to provide descriptor
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data in Flash, RAM or dynamically at runtime.
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- STALL is now a status in usbTxLen* instead of a message. We can now conform
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to the spec and leave the stall status pending until it is cleared.
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- Made usbTxPacketCnt1 and usbTxPacketCnt3 public. This allows the
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application code to reset data toggling on interrupt pipes.
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* Release 2006-07-18
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- Added an #if !defined __ASSEMBLER__ to the warning in usbdrv.h. This fixes
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an assembler error.
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- usbDeviceDisconnect() takes pull-up resistor to high impedance now.
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* Release 2007-02-01
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- Merged in some code size improvements from usbtiny (thanks to Dick
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Streefland for these optimizations!)
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- Special alignment requirement for usbRxBuf not required any more. Thanks
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again to Dick Streefland for this hint!
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- Reverted to "#warning" instead of unused static variables -- new versions
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of IAR CC should handle this directive.
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- Changed Open Source license to GNU GPL v2 in order to make linking against
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other free libraries easier. We no longer require publication of the
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circuit diagrams, but we STRONGLY encourage it. If you improve the driver
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itself, PLEASE grant us a royalty free license to your changes for our
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commercial license.
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* Release 2007-03-29
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- New configuration option "USB_PUBLIC" in usbconfig.h.
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- Set USB version number to 1.10 instead of 1.01.
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- Code used USB_CFG_DESCR_PROPS_STRING_DEVICE and
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USB_CFG_DESCR_PROPS_STRING_PRODUCT inconsistently. Changed all occurrences
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to USB_CFG_DESCR_PROPS_STRING_PRODUCT.
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- New assembler module for 16.5 MHz RC oscillator clock with PLL in receiver
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code.
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- New assembler module for 16 MHz crystal.
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- usbdrvasm.S contains common code only, clock-specific parts have been moved
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to usbdrvasm12.S, usbdrvasm16.S and usbdrvasm165.S respectively.
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* Release 2007-06-25
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- 16 MHz module: Do SE0 check in stuffed bits as well.
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* Release 2007-07-07
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- Define hi8(x) for IAR compiler to limit result to 8 bits. This is necessary
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for negative values.
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- Added 15 MHz module contributed by V. Bosch.
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- Interrupt vector name can now be configured. This is useful if somebody
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wants to use a different hardware interrupt than INT0.
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* Release 2007-08-07
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- Moved handleIn3 routine in usbdrvasm16.S so that relative jump range is
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not exceeded.
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- More config options: USB_RX_USER_HOOK(), USB_INITIAL_DATATOKEN,
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USB_COUNT_SOF
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- USB_INTR_PENDING can now be a memory address, not just I/O
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* Release 2007-09-19
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- Split out common parts of assembler modules into separate include file
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- Made endpoint numbers configurable so that given interface definitions
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can be matched. See USB_CFG_EP3_NUMBER in usbconfig-prototype.h.
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- Store endpoint number for interrupt/bulk-out so that usbFunctionWriteOut()
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can handle any number of endpoints.
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- Define usbDeviceConnect() and usbDeviceDisconnect() even if no
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USB_CFG_PULLUP_IOPORTNAME is defined. Directly set D+ and D- to 0 in this
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case.
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* Release 2007-12-01
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- Optimize usbDeviceConnect() and usbDeviceDisconnect() for less code size
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when USB_CFG_PULLUP_IOPORTNAME is not defined.
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* Release 2007-12-13
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- Renamed all include-only assembler modules from *.S to *.inc so that
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people don't add them to their project sources.
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- Distribute leap bits in tx loop more evenly for 16 MHz module.
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- Use "macro" and "endm" instead of ".macro" and ".endm" for IAR
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- Avoid compiler warnings for constant expr range by casting some values in
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USB descriptors.
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* Release 2008-01-21
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- Fixed bug in 15 and 16 MHz module where the new address set with
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SET_ADDRESS was already accepted at the next NAK or ACK we send, not at
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the next data packet we send. This caused problems when the host polled
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too fast. Thanks to Alexander Neumann for his help and patience debugging
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this issue!
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* Release 2008-02-05
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- Fixed bug in 16.5 MHz module where a register was used in the interrupt
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handler before it was pushed. This bug was introduced with version
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2007-09-19 when common parts were moved to a separate file.
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- Optimized CRC routine (thanks to Reimar Doeffinger).
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* Release 2008-02-16
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- Removed outdated IAR compatibility stuff (code sections).
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- Added hook macros for USB_RESET_HOOK() and USB_SET_ADDRESS_HOOK().
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- Added optional routine usbMeasureFrameLength() for calibration of the
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internal RC oscillator.
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* Release 2008-02-28
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- USB_INITIAL_DATATOKEN defaults to USBPID_DATA1 now, which means that we
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start with sending USBPID_DATA0.
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- Changed defaults in usbconfig-prototype.h
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- Added free USB VID/PID pair for MIDI class devices
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- Restructured AVR-USB as separate package, not part of PowerSwitch any more.
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* Release 2008-04-18
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- Restructured usbdrv.c so that it is easier to read and understand.
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- Better code optimization with gcc 4.
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- If a second interrupt in endpoint is enabled, also add it to config
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descriptor.
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- Added config option for long transfers (above 254 bytes), see
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USB_CFG_LONG_TRANSFERS in usbconfig.h.
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- Added 20 MHz module contributed by Jeroen Benschop.
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* Release 2008-05-13
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- Fixed bug in libs-host/hiddata.c function usbhidGetReport(): length
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was not incremented, pointer to length was incremented instead.
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- Added code to command line tool(s) which claims an interface. This code
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is disabled by default, but may be necessary on newer Linux kernels.
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- Added usbconfig.h option "USB_CFG_CHECK_DATA_TOGGLING".
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- New header "usbportability.h" prepares ports to other development
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environments.
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- Long transfers (above 254 bytes) did not work when usbFunctionRead() was
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used to supply the data. Fixed this bug. [Thanks to Alexander Neumann!]
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- In hiddata.c (example code for sending/receiving data over HID), use
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USB_RECIP_DEVICE instead of USB_RECIP_INTERFACE for control transfers so
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that we need not claim the interface.
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- in usbPoll() loop 20 times polling for RESET state instead of 10 times.
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This accounts for the higher clock rates we now support.
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- Added a module for 12.8 MHz RC oscillator with PLL in receiver loop.
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- Added hook to SOF code so that oscillator can be tuned to USB frame clock.
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- Added timeout to waitForJ loop. Helps preventing unexpected hangs.
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- Added example code for oscillator tuning to libs-device (thanks to
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Henrik Haftmann for the idea to this routine).
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- Implemented option USB_CFG_SUPPRESS_INTR_CODE.
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* Release 2008-10-22
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- Fixed libs-device/osctune.h: OSCCAL is memory address on ATMega88 and
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similar, not offset of 0x20 needs to be added.
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- Allow distribution under GPLv3 for those who have to link against other
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code distributed under GPLv3.
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* Release 2008-11-26
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- Removed libusb-win32 dependency for hid-data example in Makefile.windows.
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It was never required and confused many people.
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- Added extern uchar usbRxToken to usbdrv.h.
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- Integrated a module with CRC checks at 18 MHz by Lukas Schrittwieser.
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* Release 2009-03-23
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- Hid-mouse example used settings from hid-data example, fixed that.
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- Renamed project to V-USB due to a trademark issue with Atmel(r).
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- Changed CommercialLicense.txt and USBID-License.txt to make the
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background of USB ID registration clearer.
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* Release 2009-04-15
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- Changed CommercialLicense.txt to reflect the new range of PIDs from
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Jason Kotzin.
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- Removed USBID-License.txt in favor of USB-IDs-for-free.txt and
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USB-ID-FAQ.txt
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- Fixed a bug in the 12.8 MHz module: End Of Packet decection was made in
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the center between bit 0 and 1 of each byte. This is where the data lines
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are expected to change and the sampled data may therefore be nonsense.
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We therefore check EOP ONLY if bits 0 AND 1 have both been read as 0 on D-.
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- Fixed a bitstuffing problem in the 16 MHz module: If bit 6 was stuffed,
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the unstuffing code in the receiver routine was 1 cycle too long. If
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multiple bytes had the unstuffing in bit 6, the error summed up until the
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receiver was out of sync.
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- Included option for faster CRC routine.
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Thanks to Slawomir Fras (BoskiDialer) for this code!
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- Updated bits in Configuration Descriptor's bmAttributes according to
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USB 1.1 (in particular bit 7, it is a must-be-set bit now).
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* Release 2009-08-22
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- Moved first DBG1() after odDebugInit() in all examples.
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- Use vector INT0_vect instead of SIG_INTERRUPT0 if defined. This makes
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V-USB compatible with the new "p" suffix devices (e.g. ATMega328p).
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- USB_CFG_CLOCK_KHZ setting is now required in usbconfig.h (no default any
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more).
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- New option USB_CFG_DRIVER_FLASH_PAGE allows boot loaders on devices with
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more than 64 kB flash.
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- Built-in configuration descriptor allows custom definition for second
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endpoint now.
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* Release 2010-07-15
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