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ibg
Joined: 19 Nov 2003
Posts: 22
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| atoi conversion |
 Posted: Mon May 17, 2004 12:45 pm |
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Hi,
I'm parsing a string using the function 'strtok'. I want to assign the different elements I'm getting to integer variables (unsigned int32, unsigned long and unsigned int). The problem is that I don't get the right conversion if the string is greater than '255'. Any idea about how can I fix that?
The code is the following
| Code: |
#include <18F452.h> // The device (PIC 18F452) include file
#device *=16 ADC=10
#define RMC_LENGTH 85
#define FISH_LENGTH 25
#include <string.h>
#include <stdlib.h>
#use delay(clock=19660800) // Sets the speed for the PIC (it�s meausured in cycles per second)
#use fast_io(A) // Fast method of doing Input/Output
#use fast_io(B) // The direction register will be set later with the "set_tris_X()" instruction
#use fast_io(C)
#use fast_io(D)
// I/O ports are mapped in memory (Have a look to the Special Function Register (SFR) of PIC18F452)
#byte PORTA = 0xF80
#byte PORTB = 0xF81
#byte PORTC = 0xF82
#byte PORTD = 0xF83
#byte PORTE = 0xF84
#use rs232(baud=38400, xmit=PIN_C0, stream=DEBUG)
struct data_fish{
unsigned int32 frequency;
unsigned int pulses;
unsigned long signal_strength;
unsigned int32 time_unit;
};
struct data_fish fish_data;
//char rmc_string[RMC_LENGTH]= "GPRMC,124654.189,A,6537.0117,N,02208.2693,E,172.16,210.05,260603,,*35";
char fish_string[FISH_LENGTH]= "FISH,151424,10,150,5"; // Format -> $FISH,FREQUENCY,PULSES,SIGNAL STRENGTH,TIME_UNIT"
char delim[2]= ",";
char *pointer;
//-----------------------------------------------------------------------------------
// Functions used by the main program
void init();
//----------------------------------------------------------------------------------
// Main program
void main(void){
int counter= 1;
init();
fprintf(DEBUG, "Starting 1...\n\r");
fprintf(DEBUG, "\r\nFISH_STRING= %s \n", fish_string);
pointer= strtok(fish_string, delim);
while(pointer != 0)
{
if (counter == 2)
{
fprintf(DEBUG, "2) %s\n", pointer);
fish_data.frequency= (unsigned int32)atoi(pointer);
}
else if (counter == 3)
{
fprintf(DEBUG, "3) %s\n", pointer);
fish_data.pulses= (unsigned int)atoi(pointer);
}
else if (counter == 4)
{
fprintf(DEBUG, "4) %s\n", pointer);
fish_data.signal_strength= (unsigned long)atoi(pointer);
}
else if (counter == 5)
{
fprintf(DEBUG, "5) %s\n", pointer);
fish_data.time_unit= (unsigned int32)atoi(pointer);
}
pointer= strtok(0, delim);
counter++;
}
counter= 0;
fprintf(DEBUG, "DATA FISH INFO \n");
fprintf(DEBUG, "%lu\n", fish_data.frequency);
fprintf(DEBUG, "%d\n", fish_data.pulses);
fprintf(DEBUG, "%lu\n", fish_data.signal_strength);
fprintf(DEBUG, "%lu\n", fish_data.time_unit);
}
//----------------------------------------------------------------------------------
// Initialisation routine
void init()
{
// SET_TRIS is necessary when using fast_io (in order to establish the pin direction)
// Remember:
// 1 -> in
// 0 -> out
set_tris_a(0x00); // 0000 0000
set_tris_b(0x00); // 0000 0000
set_tris_c(0x00); // 0000 0000
set_tris_d(0x00); // 0000 0000
}
//----------------------------------------------------------------------------------
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Thanks for all,
ibg |
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Haplo
Joined: 06 Sep 2003
Posts: 659
Location: Sydney, Australia
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| Posted: Mon May 17, 2004 5:16 pm |
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Quoting from CCS manual:
| Quote: |
Syntax:
ivalue = atoi(string)
or
lvalue = atol(string)
or
i32value = atoi32(string)
Parameters:
string is a pointer to a null terminated string of characters.
Returns:
ivalue is an 8 bit int.
lvalue is a 16 bit int.
i32value is a 32 bit int..
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So you need to use atol() or atoi32(), depending on the size of your numbers. |
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Guest
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| It's working :-) |
| Posted: Wed May 19, 2004 11:34 am |
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Thanks for the help :-) It's working now.
Vi ses,
ibg |
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