UNO test

//Testing an UNO, typing pins in on the serial monitor.
//In setup, pins are set for input or output. Must be done before uploading.
//For use, just type number for pin in serial send.
//If input, state is shown, if output, state is toggled. If on goes off, if off goes on.
//If pin is higher than 13, its a analog pin and is allways read as analog.

#include <string.h>

char readstring[20];
char tmpstr[20];
int t=0;
int pinType[20];
bool pinState[20];


void setup()
{
    Serial.begin(9600);
    Serial.println("serial on/off ");
    pinModeSet(2,INPUT);
    pinModeSet(3,INPUT);
    pinModeSet(4,INPUT);
    pinModeSet(5,INPUT);
    pinModeSet(6,INPUT);
    pinModeSet(7,INPUT);
    pinModeSet(8,INPUT);
    pinModeSet(9,OUTPUT);
    pinModeSet(10,INPUT);
    pinModeSet(11,INPUT);
    pinModeSet(12,INPUT);
    pinModeSet(13,OUTPUT);
    for(int t=14; t<20; t++)
        pinModeSet(t,INPUT); //analog channels, can't be output. A0=14, A1=15 etc

}

void loop()
{
    t=0;
    int num,val;

    while(Serial.available())
    {
        delay(3);
        char c = Serial.read();
        if(c=='\n') c='\0';
        readstring[t]= c;
        t++;
    }

    if(strlen(readstring)>0)
    {
        Serial.println(readstring);
        num=atoi(readstring);
        if(num>1&&num<20)
        {
            if(pinType[num]==INPUT)
            {
                if(num<14)
                {
                    val=digitalRead(num);
                    Serial.print("Digital read on pin: ");
                }
                else
                {
                    val=analogRead(num);
                    Serial.print("Analog read on pin: ");
                }
                Serial.print(num);
                Serial.print(" has value : ");
                Serial.println(val);
            }
            if(pinType[num]==OUTPUT)
            {
                if(num<14)
                {
                    if(pinState[num]==LOW)
                        pinState[num]=HIGH;
                    else
                        pinState[num]=LOW;
                    digitalWrite(num,pinState[num]);
                    Serial.print("Digital write on pin: ");
                    Serial.print(num);
                    Serial.print(" set to state : ");
                    Serial.println(pinState[num]);
                }
            }
        }
    }
    readstring[0]='\0';
}

void pinModeSet(int n,int type)
{
    pinMode(n,type);
    pinType[n]=type;
    pinState[n]=LOW;
}

void printstrhex(char *st)
{
  int l=strlen(st);
  for(int t=0; t<l; t++)
  {
    Serial.print(st[t],HEX);
    Serial.print("-");
  }
  Serial.println();
}

void cpystr(char * dst, char *sst, int t)
{
    int l=strlen(sst);
    int c=0;

    for(int n=t; n<=l; n++)
    {
        dst[c]=sst[n];
        c++;
    }
}