Ultimately though, projects like this are limited by how fast the data can be moved onto the display and how fast the display chip can move that into its own VRAM. I re-coded some of the Adafruit graphics library for this reason and saw a performance improvement that was utterly astonishing. Even the semaphores I've used to control stuff are operated at the bit level to save a few bytes. #Programming arduino for mac code#I'm not a huge advocate of many other similar short-forms because they make code harder to read and generally brittle, even for the original developer(s)! The biggest optimisation we can do on 8-bit is to do 8-bit - so only use 8-bits when you only *need* 8 bit rather than lazily declaring an integer (signed 16-bits by default). These days we don't need those optimisations so while I've allowed myself (for example) ternary operators for single line IF.ELSE.ENDIF constructs I eschew a lot of the more usual optimisations at source level you know the sort of thing like this: if (something is true) // code continues here (regardless of the condition) Which leads to brittle code because there are no braces to delimit the structure. My feeling with C is because it was written for Teletypes on the PDP11 if memory serves, every byte saved in the language definition was a good one. I tend to stay out of those forums for the very reason you've observed. C++) could be used to shave a little overhead, I'm already reasonably well-versed in slimming code down, although, naturally I'm facing the optimizations that the compiler already does which is why the code isn't minified to the point where it's unreadable. I come from the 4 & 8-bit days and although pure C (vs. It's not a sketch in traditional terms but a multi-file "epic" that needs Visual Code and Platform IO to be compiled. It's largely development code so a fair bit of untested/unlinked source remains there. You can see the code at Github to see why HotStuff (my first 'Ible) is so large but a huge amount of the available ram was devoured by the libraries necessary to just make the graphics work. 10uF would have been fine, but my 33uF capacitors were smaller than the 10uF capacitors I had on hand. The - side of the capacitor is connected to the black GND pin.Ī capacitor of several uF is fine, I used 33uF. The + side of the capacitor is connected to the extra pin, which is intended for the RST position of the completed connector. After putting the plastic shells back on, I realize next time I should make the wires on the capacitor slightly longer, by perhaps another 1/8 to 1/4 inch. This took some extra force to get the shell on, because the solder and capacitor wire made the connector a little thicker. Push the connectors back into the shells using a pin. Use a very small amount of solder, to keep it from wicking into the pin receptacle, which would prevent it from sliding onto the ICSP header on the Arduino.Ĭut the wire off of the extra Dupont wire connector we are putting the in the RST position of the completed connector end. Use locking forceps to clamp wires in place and to act as a heatsink to protect the wire insulation, and solder a capacitor to the connectors.
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