Simple C program for detecting the start of a message

[tom_hanks]

Hi,
I want to detect the incoming string with following message......

"01,F0,F1" as a start of message flag....

i am storing the incoming data in
static char comm[128];

can any one, guide me, to detect the start of message ?

TIA,
tom

 

[sharadbags]

Re: simple C program ?

you can input the message on a character by character basis
using getchar()

and keep a check when is the getchar() first being called
for that case write the printf function with what you wish to display

 

[ahmedsalah00]

simple C program ?

#include <conio.h>
main()
{
char c=0;
static char comm[128];

c=getche();

if (c==0x01)
{
c=getche();
if (c==0xF0)
{
c=getche();
if (c==0xF1)
{
for (char i=0;i<128;i++)
{
c=getche();
comm=c;
}
}
}
}
}

 

[btbass]

simple C program ?

The SLIP protocol is good for this sort of thing and quite easy to impliment.
Just type slip into google, look for 'Serial Line Internet Protocol'

 

[shabab]

simple C program ?

take input character by character then check it by if statements if mached then print what you want

 

[goosecool]

Re: simple C program ?

I would say, depending on the type of machine, XOR can be used. Just XOR the incoming signal with the FLAG and if the result is Zero thats the FLAG.