hey folks!
I wonder if I can get something in Arduino Duemilanove programming that could help me in making a look up table. I mean, I want to read an analog signal and for every value that is read by Arduino it should correspond to certain constant value. say, for 2v-100, 3v-200,4v-300 etc...
{2,3,4...} -------->{100,200,300...}
is this gettable?
help me..
thnq,
chiru
A simple formula might be a better answer in your situation. You can use a look-up table but, it would not be near as efficient.
x = (y * 100) - 100
Or you could try the "map" function.
Or if the mapping is non linear and you want to interpolate between values you could use multimap() - Arduino Playground - MultiMap -
Or if you don't want to interpollate you can write a gettable() function yourself
int gettable(int in)
{
if (in == 2) return 100;
if (in == 3) return 200;
etc.
return 0; // keeps compiler happy ;)
}
which can be made more efficient with an array - see reference section
int table[] = {100,200,300,400,500, ...};
int gettable(int in)
{
return table[in-2]; // assuming the input values start with 2 ..
}