If you have Processing, you can try my code. ![]() Hehe! That was just randomness (I've heard that it causes some glitch on the Mega, or something). The program takes samples of the current millis() and micros() timer output values sending them as fast as possible to the serial terminal. This is the physical result on real hardware showing the millisecond jitter at 42 ms. The next program shows the actual output from an Arduino Uno. For example, you could change the interval to a random time between 1mS, every time the LED goes on or off.īut without the the "!!!" unless you like mysteries. Arduino Program showing millis and micros output. You would probably only want to change it when the "time's up". I've haven't used interrupts on the Arduino, so someone else can jump-in and help with that.Īctually, you wouldn't want to change the time every-time through the loop. If you are doing something else complicated, or something else that can't be interrupted, and you only get-back to checking the time every 10 minutes. ![]() Sure! But, it's up to your program to be checking the time in a loop. For most timing applications, you want to keep the program going, while keeping track of the time in the background.Īlso, is millis() accurate enough to execute a task every 15 minutes? That is bad programming and must be avoided for the reasons being said. ![]() But did it the lazy way that is to disable global int. I'd say you should probably avoid using delay, unless you truly want to delay or pause. Who wrote millis() or micros() disabled interrupts with one pourpouse that is:-Prevent timer0millis and timer0overflowcount vars from being written on timer0 overflow in the middle of the read of that vars. You can change the interval every time throught the loop,* and you can have multiple intervals & multiple previous-times (with different variable names) for multiple-different timers running at the same time. It does not suffer from the integer overflow occurring after 50 days (millis) or 7 hours (micros), so it can run indefinitely. Take another look at the Blink Without Delay example. I just proposed a millis() or micros() based timer here.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |