I currently have the ARM7 board, and I want to add a temperature sensor to it. I chose the Analog Devices TMP03 due to its relatively low power consumption, and the cool feature of digital modulation- it outputs a pulse with a width directly proportional to the temperature measured. Being new to this whole SRV thing, I was wondering if a) connecting it to the open UART port would be reasonable, and b) how complicated would it be to get the temperature information sent from the robot to the base computer?

I just soldered a digital temp sensor to pin 6 on the LPC board, which corresponds to P0.5. I put this code in utils.c to read the value of P0.5:
 
//Read Pin 5 for temp sensor
unsigned char P05_read()  
{
     return (unsigned char)((IOPIN0 & 0x00000020) >> 5);
}
 
since I saw that was how the other pins were read. After adding another case, I called GetTemp to measure the pulse width of the temp sensor (see below), and everything kept freezing. I couldn't find anything on initializing p0.05, so do I have to initialize P0.05 as an input, or is it one by default?
 
int GetTemp(void) {
 
     unsigned char a;
     unsigned int b;
     int T2 =0;
     int T1=10; //T1 is 10 ms for temps < 75 C
 
     
     //wait until 1 in P05 (T1 is high)
     do { a = P05_read(); }
     while(a==0);
 
     //wait for 0 to read values (T2)
     do { a = P05_read(); }
     while(a==1);
 
     //for 25 ms, which is max length of T2
     for (b=0;b<25;b++)  
     {
 
           a = P05_read();
 
           if(a!= 1)  
           {  
           T2++;  
           }
 
           delayUs(1000);      //delay 1 ms
     }
 
     //Do math to find Temp in degrees F: T=455 - (720*T1)/(T2)
     T1=720*T1;
     T1=T1/T2;
     T1=455-T1;
 
     return T1;
}