| 0,0 → 1,62 |
|---|
| AVRcam Release 1.4 |
| 1/16/2005 |
| |
| Whats New in v1.4: |
| -Greatly improved the issue where the AVRcam would potentially |
| lock up in particular situations (especially after lots of frame |
| dumps). This was due to a combination of bugs, which have all been fixed: |
| -turned off interrupts in certain critical sections that were missed |
| previously |
| -only allow PCLK to be piped into timer1 when needed (i.e., when dumping |
| a line or tracking a frame). |
| -allowed the main executive to check both the fast event bitmask as well |
| as the normal event queue on each pass of the main executive |
| |
| I'll be curious to hear if this has completely fixed the issue (I haven't |
| seen it happen after ~500 frame dumps, but the real test is when |
| others try it :-). Also note: an input voltage below 6 volts will |
| cause the system to work sometimes and lock up others. The input voltage |
| regulator really wants to see a 6V minimum. I had drained |
| 8 AA NiMH batteries down to where they were only providing ~4.8 V at the |
| input. The system worked for a little while, and then started locking |
| up. I immediately changed batteries and everything was fine. |
| |
| -Improved how the colorMap gets written to EEPROM. Now, before |
| each byte in the colorMap is written to EEPROM, a check of the |
| current value in EEPROM is made to see if the old value matches |
| the new value. If so, the write is skipped. Also, after a value |
| is written, it is read back to ensure that it is correct, and |
| will re-write up to three times if needed. |
| |
| -Moved the UART rx ISR to the UartInterface.c file, instead of having |
| it in its own UartInterfaceAsm.S file. The ISR is in C now. |
| |
| -Added a revision history to each source file so that people can |
| see the changes on a per-version basis. |
| |
| |
| ---Misc Info about AVRcam--- |
| |
| * The AVRcam source files were built using the WinAVR distribution |
| (version 3.3.1 of GCC). I haven't tested other versions of GCC, |
| but they should compile without too much difficulty. The makefile |
| used to build the source is included. |
| |
| * Currently, the AVRcam only works at a baud rate of 115.2 kbps. I |
| am in the process of working on autobaud routines that will set the |
| baud rate automatically at start up. I'm pretty sure the system |
| should be able to track 8 objects all the way down to a baud rate |
| of 38.4 kbps. Check back to www.jrobot.net for more info about the |
| AVRcam. |
| |
| * Different portions of the code are #ifdef'ed in or out to show |
| the various debugging that can be turned on in the system. The |
| debugging mechanisms are typically for dumping additional information |
| out to a serial terminal for viewing, and are not intended to work |
| with the AVRcamVIEW PC application. The code, as released, doesn't |
| have any debugging features turned on. |
| |
| * For more info about the AVRcam, check out http://www.jrobot.net |
| |
| John Orlando |
| January 16, 2005 |