Arduino mega pin configuration1/18/2024 ![]() ![]() Implemented and tested for standard Arduino (Uno) and Arduino Mega.Main features of the new digital I/O implementation I tried various options (described at the end of this article) and came up with the solution presented here. I wondered if the digital I/O could be made faster, but also portable and easy to use. Moreover, you need to understand the I/O registers to be able to use them. if you move from Arduino Uno to Arduino Mega). While digitalWrite will work with any Arduino board, this approach will only work with one board and you will have to modify the code to use it with different board (e.g. But by this you lose the portability of your program. In other words, get closer to the hardware. In this new article I finally present my solution.Ĭertainly, there is the ultimate solution - use the I/O registers directly. This article was mostly about why the functions are slow it did not offer any easy-to-use solution. Some time ago I wrote an article about this topic - ' Why is the digital I/O in Arduino slow and what can be done about it?'. Sure, for most users it does not matter whether it takes 0.1 or 4 microseconds, it is still fast enough, but there are situations where the speed or power consumption are critical. It takes about 4 microseconds to change the logical level of an output pin (for example, to turn on an LED) using the Arduino digitalWrite function, while it takes less than 0.1 microsecond if you write the code 'natively', using the I/O registers of the Atmel AVR microcontroller (which is the brain of the Arduino board). It is rather well known that the functions for digital I/O in Arduino are quite slow. If you just want to try the new functions, feel free to go directly to "Using the code" section, otherwise, read on for some introduction to the problem. This article describes my version of digital input/output functions for Arduino, which work faster than the 'built-in' functions while remaining as easy to use and portable as the original ones. Download source code and examples - dio2.zip - 26.9 KB. ![]()
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |