noob need help understanding function parameters

Projects Programming
1

I want to pass a 2 char mnemonic to a function and have it return the index. I an very new to this world and cannot seem to get this to work. I get the parsed strings OK. I want to pass them to the function getmnemonic and have it give me the index. The memory stuff is fouling me up. Can someone please help.

#include <string.h>

int cp = 0; // char pointer 
boolean cfound = false; // complete command found 
boolean cstart = false; // start of command
char stringIn[50]; // commandbuffer 

char *parsed[10];   //parsed strings[/color]int counter = 0;   //initialise the counter
char *command[]={"FF","DF","SF","SD","pH","EC","CN","FR","FM","PR","PN","PC","SN"}; 

#define SOC '{' 
#define EOC '}'

void setup() {
 Serial.flush(); 
 Serial.begin(9600); 
 delay(500); 
 //Serial.print("(:H:)"); 
}

 void loop() {
 int sa; 
 char bt; 
 sa = Serial.available(); // count serial buffer bytes
 
 if (sa > 0) { // if buffer not empty process buffer content
  for (int i=0; i < sa; i++){ 
   bt = Serial.read(); // read one char from the serial buffer
     
   if (cstart ) 
   {
    stringIn[cp] = bt; 
    cp++;
   } 
   
   if (bt == SOC) { // got a start of command
    cstart = true;
    //Serial.println("start");
   }
     
   if (bt == EOC && cstart) { // check for last command char ) 
    cfound = true; 
    stringIn[--cp] = NULL;
    counter=0;
    break; // end for-loop 
   } 
  } 
 } 
 
 if (cfound) { 
   for (int i=0; i<cp; i++){
      Serial.print(stringIn[i]);   //data is correct at this point
    }
  
  char *token = strtok(stringIn, ":");
  
  if(token)
  {
   parsed[counter++] = strdup(token); // You've got to COPY the data pointed to
   token = strtok(NULL, ":"); // Keep parsing the same string
    
   while(token)
   {
      //Serial.println(atoi(parsed[0]));
      parsed[counter++] = strdup(token); // You've got to COPY the data pointed to
      token = strtok(NULL, ":");
   }
   
   if (counter > 0 ) 
    {
     processmessage();
    } 
   cp = 0;
   stringIn[cp] = NULL;
   cstart = false;
   cfound = false; 
   }
  }
 }
 
 //convert string to integer  int i = atoi(string);
 //convert string to float float x = float(string);
 //send float out serial Serial.print(x,2);  x is float to 2 decimal places
 
 void processmessage(void) 
  {
      
  Serial.println(counter);
  for (int i=0; i<counter; i++) {
  Serial.println( parsed[i]);
  }
  
  switch (getmnemonic(parsed[0])) {
    
   case 0: //FF Channel fill float
   Serial.println("Fill float");
   
   break;
   
   case 1: //DF Channel drain float
   Serial.println("Drain float");
   
   break;
  }
 } 

int getmnemonic(char* code )
 {
   
   Serial.println( code);
   for (int i=0; i< 12; i++) 
   {
    if (command[i] == code)
     {
      Serial.println("match");
      return(i);
      break;
     }
   } 
 }
2

Try something like this (returns 255 if invalid mnemonic):

unsigned char getmnemonic(char *s)
{  unsigned char i,r=255;
   for (i=0; i<(sizeof(command)/sizeof(char *)); i++)
   {  if (!strcmp(s,command[i]))
      {  r = i;
         break;
      }
   }
   return r;
}