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341 lines
15 KiB
HTML
Executable File
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>Procyon AVRlib Release Notes</title>
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<!--#config timefmt="%a %b %d, %Y" -->
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<h1 align="center">Procyon AVRlib Release Notes</h1>
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<center>Written by Pascal Stang | Updated:
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<!--#echo var="LAST_MODIFIED" -->
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</center>
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<hr>
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<p><strong>3/12/2005</strong>
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<ul>
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<li>Fixed AVRlib to comply to new WinAVR package (avr-libc has dropped several
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methods that were depricated causing the old AVRlib to fail to compile). Sorry
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about the delay. Please note that I've changed small parts of dozens of files.
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I may have introduced bugs that I haven't yet detected. Your feedback welcome.</li>
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</ul>
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<p><strong>1/30/2005</strong>
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<ul>
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<li>Added new <strong>lis3l02</strong> accelerometer library. This ST accelerometer
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incorporates a 3-axis sensor and A/D converter in one 28-pin SOIC package
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with I2C and SPI bus. Unfortunately, the production future of the digital
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version of this accelerometer is unknown.</li>
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<li>Added new <strong>extint</strong> external interrupt library. The library
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is not complete, but does work nicely for some processors. It is primarily
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designed to do two things:
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<ul>
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<li>abstract AVR external interrupts so that programs which use them can
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more easily cross-compile between different processors</li>
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<li>allow novice (and even advanced) users to be able to use external interrupts
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without looking up a bunch of register and bit defines in the datasheets.</li>
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</ul>
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</li>
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<li>Revised GPS library to standardize on units used for latitude/longitude
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angles</li>
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<li>Improved NMEA library. Packet processing function now returns type of packet
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decoded. Packet parsers reject valid but empty packets.</li>
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<li>MMC library has proper #defines to turn on/off debugging statements</li>
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<li>uartsw and uartsw2 libraries now support optional inversion of serial signal
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via #define in conf file</li>
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</ul>
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<p><strong></strong><strong>10/15/2004</strong>
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<ul>
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<li>Added new spieeprom library. Not quite sure if it works properly.</li>
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</ul>
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<p><strong></strong><strong>9/25/2004</strong>
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<ul>
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<li>Added a simple MultiMedia Card / SecureDigital Card interface library. The
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library allows you to read and write sector-sized (512 byte) data chunks.
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Please see mmc.h for information about how to connect the card to the microcontroller.</li>
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<li>Added uartGetByte() functions to uart.c and uart2.c. These functions emulate
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the typical getchar() function and return a received character if available,
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otherwise -1.</li>
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<li>Fixed bug causing incorrect I2C bus speed.</li>
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</ul>
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<p><strong>6/25/2004</strong>
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<ul>
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<li>Changed encoder library to new read-in scheme which is more technically
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correct and resistant to error. New scheme counts both rising and falling
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edges of PHASEA, so be prepared for twice the precision (you'll get double
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the usual number of counts per revolution).</li>
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<li>Added timer functions to exploit arbitrary frequency/precision PWM in new
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AVR processors</li>
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<li>Fixed timerPause() precision management bug in Timer/Timer128 libraries.<br>
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TimerPause function should now work correctly for longer delays</li>
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<li>Added timerXGetPrescaler() functions to timer libraries to avoid code maintenance
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issues and to reduce overall code size</li>
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<li>Fixed bug in Pulse library that cause wildly incorrect frequencies to be
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produced</li>
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</ul>
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<p><strong>5/04/2004</strong>
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<ul>
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<li>Added MegaIO directory with simple routines for accessing the MegaIO peripheral
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expander. MegaIO allows you to use a slave AVR processor as a peripheral expander
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and control it easily from a master AVR processor over the I2C bus. This gives
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your master processor easy access to: an extra buffered UART, extra PWM outputs,
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extra A/D inputs, extra I/O lines, extra RAM, and more.</li>
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</ul>
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<p><strong>2/27/2004</strong>
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<ul>
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<li>Improved original Software UART library (uartsw: uses Timer1 OC1A OC1B and
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IC1)</li>
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<li>Added new Software UART library (uartsw2: uses Timer0 and Timer2 and INT2)</li>
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<li>Fixed small but catastrophic bug in the Software Memory Bus (sramsw)</li>
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<li>Fixed small but catastrophic bug in the Timer library when using Timer 0
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Output Compare</li>
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<li>Fixed Timer128 library bug when using Timer 3 Output Compare B</li>
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<li>Added support for ICR top-count PWM when supported by processor</li>
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<li><strong>Thanks to all the users who have offered bugfixes and feedback!</strong></li>
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</ul>
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<p><strong>2/22/2004</strong>
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<ul>
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<li>Added ADS7828 I2C A/D Converter Library + example code</li>
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<li>Added DS1631 I2C Temperature Sensor Library + example code</li>
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<li>Timer/Timer128 Library</li>
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<ol>
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<li>For processor that support it, timerPause() will sleep the processor during the delay time,
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thereby reducing power consumption. All interrupts are still active so hopefully this shouldn't
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break anybody's code.</li>
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<li>The timer library will now compile properly for the processors with only timers 0,1
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(by excluding timer2 functions automatically)</li>
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<li>Bugfix on Timer3 initialization</li>
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<li>A big thanks to those that wrote in to report bugs or offer suggestions for improvement!</li>
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</ol>
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<li>Servo Library: optimized slightly</li>
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<li>UART/UART2 Library: Improved compile compatibility across more AVR processors</li>
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</ul>
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<p><strong>9/15/2003</strong>
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<ul>
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<li>I2C Library
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<ol>
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<li>A few bugfixes here. i2cMasterSend and i2cMasterReceive finally return
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error values if the target device is not present. This is especially important
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in the case of receive because that would otherwise hang. Some debugging
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has been added to the I2C interrupt state machine. Debugging can be turned
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on via #define but needs to be customized based on the processor in use.</li>
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</ol>
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</ul>
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<p><strong>7/23/2003</strong>
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<ul>
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<li>Cmdline Library (<strong>NEW</strong>)
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<ol>
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<li>This library is a complete fairly-easy-to-use command line interface
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complete with advanced line editing and history buffer. You add the commands
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and the functions to run for those commands. The arguments passed to your
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commands are available as strings or interpreted as decimal or hex integers.</li>
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</ol>
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<li>Uart/Uart2 Library
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<ol>
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<li>Added a new method uartAddToTxBuffer() which adds one character at a
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time to the uart transmit buffer. The function can be used the the same
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way as uartSendByte, but writes only to the buffer. This is helpful for
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printf-ing inside interrupts or time-critical sections.</li>
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</ol>
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<li>i2ceeprom function library
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<ol>
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<li>Fixed a compile bug that escaped last time.</li>
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<li>Bugfix: there was an endian-ness discrepancy between the read and write
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byte routines for the eeprom. Problem has been fixed thanks to feedback
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from users.</li>
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</ol>
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</ul>
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<p><strong>7/12/2003</strong>
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<ul>
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<li>General Note
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<ol>
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<li>CAUTION: The makefile and build process for AVRlib has changed to make
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installation and management simpler. You will need to define an AVRLIB
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environment variable to point to the location where you keep AVRlib. See
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the revised installation guide for more details.</li>
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<li>I made a lot of small fixes to various libraries without properly recording
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the changes. Sorry.</li>
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</ol>
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<li>STX/ETX function library
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<ol>
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<li>The receiving packet engine has been revised for the stx/etx protocol.
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It's somewhat less stupidly coded now and should perform better. Fixed
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a bug that made servicing an empty receive buffer excessively long.</li>
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</ol>
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<li>Timer/Timer128 function library
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<ol>
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<li>Since the creation of the timer library, the timerPause function had
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a bug/deficiency which caused it to be either slightly or grossly off
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in timing depending on the delay requested and the current prescaler setting.
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This bug is now fixed at the expense of a little extra code and timing
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performance should be considerably more accurate.</li>
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</ol>
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</ul>
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<p><strong>6/06/2003</strong>
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<ul>
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<li>General Note
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<ol>
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<li>I've recently seen the need for more project-dependent configurable
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settings in the core AVRlib libraries (uart, timer, rprintf). Rather than
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creating a smorgasboard of new "conf" files to handle the settings,
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I've decided to handle most things via #ifdefs and user-optional #defines.
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My feeling is that for core libraries, it nice to not have to lug around
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"conf" files all the time. We'll see how it goes...</li>
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</ol>
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<li>UART and UART2 function libraries
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<ol>
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<li>You can now override the default UART receive handling (placing of the
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data into the receive buffer), by using the uartSetRxHandler() function
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and providing your own function.</li>
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<li>You can now adjust the default size of the UART Rx/Tx buffers by #defining
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the size before including uart.h. I recommend placing such #defines in
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your global.h.</li>
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</ol>
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<li>UARTSW function library
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<ol>
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<li>Out of personal need, I have finally gotten the software-driven UART
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code working. Please consider this an alpha release. It works well, but
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the library is still in flux.</li>
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</ol>
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<li>A2D function library
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<ol>
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<li>Efforts are being made to make the A2D functions compatible (compile
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transparently) over a greater range of AVR processors including the new
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Mega8,16,32,64. Please be patient if proper support for your processor
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is temporarily broken.</li>
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</ol>
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<li>Timer/Timer128 function library
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<ol>
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<li>#defines have been added to specify the timer prescaler rates on RealTimeClock-equipped
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timer. You may have noticed that the RTC-equipped timer always has a different
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prescaler selection range than the other timers. You must use the new
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TIMERRTC_CLK_DIV defines instead of the TIMER_CLK_DIV defines on these
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timers, otherwise you will get wrong results. </li>
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<li>You can now change the default interrupt handler type (INTERRUPT vs.
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SIGNAL) used for the timers by #defining it before including timer.h.
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I recommend placing such #defines in your global.h.</li>
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</ol>
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</ul>
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<p><strong>5/29/2003</strong>
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<ul>
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<li>Pulse function library
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<ol>
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<li>There are two new functions PulseT1AStop() and PulseT1BStop(), that
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allow the stopping of pulse output regardless of the previously programmed
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number of pulses to be output. The new stop commands are crucial when
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using the continuous pulse output mode.</li>
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</ol>
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</ul>
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<p><strong>5/1/2003</strong>
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<ul>
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<li>KS0108 Graphic LCD driver library
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<ol>
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<li>Made some improvements to the code structure and #define names, eliminates
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some unnecessary lines.</li>
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<li>Implemented <font color="#FF0000">untested</font> support for up to
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4 controller chips (240x64 pixel display).</li>
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</ol>
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<li>rprintf library
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<ol>
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<li>Thanks to some feedback, and some testing, I recently realized I had
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doubled the compiled size of the printf library when I added a floating-point
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print function a several months ago.</li>
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<li>The floating-point print can now be enabled or disabled in the rprintfconf.h
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file. (it is disabled by default)</li>
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</ol>
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</li>
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</ul>
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<p><strong>4/30/2003</strong>
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<ul>
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<li>Uart function library
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<ol>
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<li>Like the timer library, you can now universally switch from SIGNAL-type
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interrupt handlers to INTERRUPT-type handlers by changing a #define in
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uart.h or uart2.h. Note, for the time being, I'm avoiding creating a "conf"
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file for the uart libraries because of their widespread use. Don't want
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to confuse users any mor than I have to.</li>
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</ol>
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<li>Pulse function library </li>
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<ol>
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<li>Fixed a major bug which caused some pulse output requests to idle until
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the timer overflowed</li>
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</ol>
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<li>ATA/IDE interface driver</li>
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<ol>
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<li>Brought this code out of basic disrepair and into service again - effort
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will continue as time permits</li>
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</ol>
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<li>FAT filesystem driver
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<ol>
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<li>Brought this code out of basic disrepair and into service again - effort
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will continue as time permits</li>
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<li>Will attempt to improve the overall interface for FAT as well as begin
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to support file writing</li>
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</ol>
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</li>
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</ul>
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<p><strong>3/13/2003</strong>
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<ul>
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<li>New "debug" function library
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<ol>
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<li>Added a new library for general functions useful when debugging. Currently
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the only available function is for nicely formatted hex/ascii table dumps
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(useful when inspecting memory or buffers).</li>
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</ol>
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</li>
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</ul>
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<p><strong>3/2/2003</strong>
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<ul>
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<li>I2C Library
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<ol>
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<li>Continued updating of I2C library - NOTE: some old functions have changed
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names slightly to clarify their purpose and relationship to new functions.</li>
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<li>Added two function pointers designed to be set by the user to handle
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incoming Slave Receive and Slave Transmit operations.</li>
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<li>Added i2cMasterTransfer function which does the common write-then-read
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operation with repeated start in between so control of the bus is not
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lost. This kind of access is common when accessing memories or register
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based devices where the address must be written before reading back a
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value. </li>
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<li>NOTE: Structure of the library continues to change but has solidified
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substantially.</li>
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</ol>
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</li>
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</ul>
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</p>
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<p><strong>2/24/2003</strong>
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<ul>
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<li>Encoder Library
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<ol>
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<li>Improved interrupt flexibility and processor compatibility for this library</li>
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<li>Unfortunately, the complexity comes at the cost of a somewhat more complicated
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encoderconf.h which the user must edit to suit their specific needs on a per-project basis.</li>
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</ol>
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</li>
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<li>I2C Library
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<ol>
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<li>Second major revision of I2C library in an attempt to make it general enough to use for
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any common I2C operations.</li>
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<li>Changes include the "functionalizing" of basic low-level I2C operations
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such as generate start,stop, and send address/data.</li>
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<li>NOTE: Structure of the library has changed somewhat and will likely continue to be refined.</li>
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</ol>
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</li>
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<li>Timer128 Library
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<ol>
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<li>Added missing PWM on and off functions in Timer128 library</li>
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</ol>
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</li>
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</ul>
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</p>
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<p><strong>2/24/2003</strong>
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<ul>
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<li>Release Notes Started</li>
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</ul>
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</p>
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<hr>
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<center>Written by Pascal Stang | Updated:
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<!--#echo var="LAST_MODIFIED" -->
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</center>
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</body>
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</html>
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