Maping sets of numbers function

[jsolarski 94]

Simple mapping function, used to "map" a value from one set of numbers to another. has been very use-full for mapping analog sensor readings to a usable range of numbers. its helped me in the past for a range of different projects

/* http://arduino.cc/en/Reference/Map

map is taken from the Arduino.cc site

 

value: the number to map

 

fromLow: the lower bound of the value's current range

 

fromHigh: the upper bound of the value's current range

 

toLow: the lower bound of the value's target range

 

toHigh: the upper bound of the value's target range

 

Returns

 

The mapped value.

Example:

Map an analog value to 8 bits (0 to 255)

void loop()

{

int val = analogRead(0);

val1 = map(val2, 0, 1023, 0, 255);

analogWrite(9, val);

}

*/

long map(long x, long in_min, long in_max, long out_min, long out_max)
{
 return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}

[bluehash 1,581]

Thats a very handy function when you try to map ADC values to real world engineering values. Thanks for sharing!

[gatesphere 45]

Hey jsolarski, do you mind if I include your function into my Arduino-like function library for the MSP430? I'm calling it MSPhere, and releasing it under the GPL once it's in a usable state.

[jsolarski 94]

go for it use it all you want, i actually used it from the arduino library and is open source, so please if you include it to give credit to the arduino website that i had borrowed it from

 

 

let me know when you finish your functions

[gatesphere 45]

Yeah, I just saw that on the Arduino site. My b.

 

Check my blog for an update, I just posted some info about it. I'm also going to start a new thread for it.