mirror of https://github.com/raphnet/4nes4snes
84 lines
3.8 KiB
Plaintext
84 lines
3.8 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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