You are currently browsing the Pilot’s Logbook weblog archives for the day 28. April 2008.
- 1. March 2010: Solve this!
- 29. January 2010: PIC32 Starter Kits Software v2.0
- 27. January 2010: Animation on the MikroE PIC32MX4 Multimedia Board
- 26. December 2009: Merry Christmas and Happy New Year
- 18. November 2009: MikroE MX4 Multimedia Board
- 30. September 2009: Good old printf() (continued)
- 26. August 2009: Changing habits... and dreaming a bit
- 24. July 2009: Where is my RAM?
- 15. July 2009: Olimex PIC-P32MX board
- 28. June 2009: A Great New Board from mikroElektronika
Archive for 28. April 2008
Optimizing the graphic library
28. April 2008 by pilot.
While working on the porting to the PIC32 of the code developed for the original PIC24 book it occurred to me that there were some obvious optimizations I had yet to explore.
For a starter, the graphic.c library was using several resources including Timer3, the Output Compare 3 module, the Output Compare 4 module and the SPI1 port in addition to one general purpose I/O (RG0 in this case). The OC3 module was used to generate the Horizontal Synchronization pulse portion of the composite video signal, but the module output pin RD2 (active as soon as the module is enabled) was not used. Rather RG0 was “manually” set during the OC3 interrupt service routine and reset during the Timer3 interrupt service routine. This added unnecessary overhead to the application as the OC3 module could easily be configured to do it all by itself…
Posted in Graphics, Tips and Tricks | 1 Comment »