RGB Code not working.

hi, im wanting change colour of rgb led. using fsr (force sensitive resistor), have arduino reading fsr pressure not changing colour of rgb.
any appreciated.

thanks

code: [select]

/*
* script following:
* 1. gets analog sensor input touch sensor
* 2. processes sensor data in 4 state machine
* 3. adjusts rgb led color based on toouch sensor pressure using pwm
*
* written by: jacek spiewla (jacekspi@umich.edu)
* date created:   2/23/2009
* date modified:  3/17/2009
*/

//setup pins
int senspin = 2;    // set touch sensor (analog) input pin on arduino
int redpin = 11;    // set pwm (analog) output pin on arduino controlling red anode
int grnpin = 9;        // set pwm (analog) output pin on arduino controlling green anode
int blupin = 10;    // set pwm (analog) output pin on arduino controlling blue anode

//setup initial values
int val = 0;            // initial value touch sensor input
int state = 1;        // initial machine state

//initialize variables
int redval;         // pulse width variable red anode
int grnval;         // pulse width variable green anode
int bluval;        // pulse width variable blue anode

void setup() {
 pinmode(redpin, output);   // set led pins output
 pinmode(grnpin, output);
 pinmode(blupin, output);
 serial.begin(9600);
}

void loop() {
 val = analogread(senspin);           // read touch sensor values
 serial.println(val);

 if (state == 1) {sleep();}        // turn off led
 else if (state == 2) {redin();}    // fade in red color
 else if (state == 3) {grnin();}    // fade in green color
 else if (state == 4) {bluin();}    // fade in blue color
}

void sleep() {
 alloff();                                  // turn off led

 if (val > 20 && val <= 500)  {state = 2;}   // test low pressure
 if (val > 500 && val <= 850) {state = 3;}   // test medium pressure
 if (val > 850) {state = 4;}              // test high pressure
}

void redin() {                  // function fade in red color , transition other states
 grnval = 0;
 analogwrite(grnpin, grnval);  // turn off green in case last state green

 if (redval == 255) {            // if red @ maximum, continue light up
   analogwrite(redpin, redval);
 } else {                    // else fade in red color
   redval ++;
   analogwrite(redpin, redval);
 }

 if (val < 20) {state = 1;}    // turn off led if no pressure detected
 if (val > 500) {state = 3;}   // fade in green if pressure has increased
}

void grnin() {                  // function fade in green color , transition other states
 redval = 0;
 bluval = 0;
 analogwrite(redpin, redval);    // turn off red in case last state blue
 analogwrite(blupin, bluval);  // turn off blue in case last state blue

 if (grnval == 255) {            // if green @ maximum, continue light up
   analogwrite(grnpin, grnval);
 } else {                    // else fade in green color
   grnval ++;
   analogwrite(grnpin, grnval);
 }

 if (val <= 500) {state = 2;}    // fade in red if pressure has decrease
 if (val >= 850) {state = 4;}    // fade in blue if pressure has increased
}

void bluin() {                  // function fade in blue color , transition other states
 grnval = 0;
 analogwrite(grnpin, grnval);    // turn off green in case last state green

 if (bluval == 255) {            // if blue @ maximum, continue light up
   analogwrite(blupin, bluval);
 } else {                    // else fade in blue color
   bluval ++;
   analogwrite(blupin, bluval);
 }

 if (val <= 850) {state = 3;}    // fade in green if pressure has decreased
}

void alloff() { // function turn off led
 redval = 0;
 grnval = 0;
 bluval = 0;

 analogwrite(redpin,  redval);
 analogwrite(grnpin,  grnval);
 analogwrite(blupin,  bluval);
}


moderator edit: please use[font=verdana] [[/font]code] [font=verdana][[/font]/code] tags when posting code.

your setting of state inconsistent.

sleep() sets state 1, 2, or 3.
redin() might set 1 or 3.
grnin() might set 2 or 4.
bluin() might set 3.

serial.print() or state in each pass through loop necessary. not jerking state around in functions necessary, too.

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