tuxduino:
ash901226:
tuxduino i notice that in reply #8 u said that my code change the global variable and then discarded. although i dont really follow what you mean, i wish to change my code to something better, so i hope you would help me tuxduino. How can i make it to become a better code, thus later on i could make it as a function and a class so that i could use it again for other led or what not.Just remove the return statements in turnon and turnoff, and declare them void.
Then, as I said before, change the names of ptimer and ntimer to something that matches their role in the code.
Your code looks a bit convoluted, though (at least to me), I'd start over by copying the blink without delay example (you find it in the IDE somewhere under File => examples)
BTW, do you know the difference between global and local variables, and do you know what "return value" means, when talking about functions ?
tuxduino actually i copied the blink without delay. i just thought that making it into a function will help reduce the complexity.before i was using void as it shouldn't return a thing but well my judgment get the best of me in saying no harm done if i put return. haha ok for the global and local variable. ok a global variable can be use and change by any part of the program this is consider as a bad programming practice that i still cant turn my head around. ok for local variable, only the particular section of the code where the variable is initialize could the variable be used.
return value means in function. urm i cant really explain it but i guess i could give you an idea of my understanding,
lets say that i have a fuction that could make a calculation of something
maybe
int Circle(int Radius)
{
int area=2*(22/7)*Radius;
return area;
}
so basically what it does is when the function circle is call with the radius of the circle inside the bracket, the function will make some calculation with the formula of 2 x phi x radius. the answer to that equation is the are of a circle,where by once complete the function will return the area to the loop in which the circle function is call.
am i rite will all this or is there any flaw in my logic/understanding it.