problem with loops and voids and saving outputs in a SD card

hello, tying save analog output potentiometer , signal pwm (servo) in sd card ".txt" or ".csv", have code doesn't working, hope can find error. below attached photo of work.

code: [select]

#include <sd.h> // sd card library
#include <servo.h>

servo myservo;  // create servo object control servo
                // maximum of 8 servo objects can created

int pos = 0;    // variable store servo position
///int pin= 9;

//spi sd card pins
// mosi = pin 11
//miso = pin 12
//sclk = pin 13
int cs_pin=10; //chipselect
////int pow_pin = 8;//pin de poder


// entradas al arduino desde el servo y el potenciometro
int inservo = 4 ; // entrada digital desde el servo arduino/ input servo arduino
int outservo = 0 ;// entrada analoga desde potenciometro arduino/input potentiometer arduino


float refresh_rate = 0.0; //dataloger refresh rate
long id = 1; // use store id # of our reading.

void setup ()
{
  serial.begin(9600);
  serial.println("initializing card");
  //cs output
  pinmode(cs_pin, output);
  ////digitalwrite(pow_pin,high);
 
  //initialize card
  if (!sd.begin(cs_pin))
  {
    serial.println("card failure");
    return;
  }
  serial.println("card ready");
 
  /////write log file header
  file logfile = sd.open("log.csv",file_write);
  if (logfile)
  {
    logfile.println(", "); // leading blank line, incase tghere weas previuos data
    string header = "  inservo  ,  outservo  ";
    logfile.println(header);
    logfile.close();
    serial.println(header);
  }
  else
  {
    serial.println("couldn't open log file");
  }
 
   myservo.attach(9);  // attaches servo on pin 9 servo object
   pinmode(outservo,input);
   pinmode(inservo,input);


}

void my_loop(void)
{

while( 1 )

{
 
  //read analog inputs , digital outputs

  int inservo_val = digitalread(inservo);
 

  int outservo_val = analogread(outservo);
 
  //create data string storing sd card
  // use csv format
  string datastring= string(id) + "   ,    " + string(inservo_val) + "     ,     " + string(outservo_val);
 
  //open file write to
  //only 1 file can open @ time
  file logfile = sd.open("log.csv",file_write);
  if (logfile)
  {
    logfile.println(datastring);
    logfile.close();
    serial.println(datastring);
  }
  else
  {
    serial.println("couldn't open log file");
  }
 
  //incremet id number
  id++;
 
  delay(refresh_rate);


}
}

void loop()
{

  for(pos = 0; pos < 45; pos += 1)  // goes 0 degrees 45 degrees
  {                                  // in steps of 1 degree
    myservo.write(pos);              // tell servo go position in variable 'pos'
    delay(15);                       // waits 15ms servo reach position
  }
  for(pos = 45; pos>=0; pos-=1)     // goes 45 degrees 0 degrees
  {                               
    myservo.write(pos);              // tell servo go position in variable 'pos'
    delay(15);     // waits 15ms servo reach position
  }
  for(pos = 0; pos <45; pos+=1)
  {
    myservo.write(pos);
    delay(25);
  }
   for(pos = 45; pos <90; pos+=1)
  {
    myservo.write(pos);
    delay(15);
  }
   for(pos = 90; pos >=45; pos-=1)
  {
    myservo.write(pos);
    delay(15);
  }
   for(pos = 45; pos >=0; pos-=1)
  {
    myservo.write(pos);
    delay(15);
  }
}

 


thank much.

what my_loop() function ?  never called.  why there anyway ?

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