receiving a string

[jaime]

Hello

I'm trying to connect the 628A to a cell phone and i need to receive a string that i dont know the lenght.

I'm doing something like this in the main

char temp[];

and in the interrupt

temp[x]=getc;
x++;

but in the end i do
printf(temp);
i get a lot of char that i didt'n receive.
What should i do?

Jaime

[jaime]

the problem is that i need to send AT and then receive OK.

Who can i do it? thanks

[PCM programmer]

Even if you don't know the length, you still need to set the maximum
array size.

#define BUFFER_SIZE 80

char temp[BUFFER_SIZE];


Then, presumably the string that you're receiving from the cell phone
has some character that shows the end of the message. Perhaps it's
a Carriage Return ? That would be 0x0d in hex. So check each
incoming character to see if it's the end-of-message character.
If it is, then write a 0x00 byte to the "temp" buffer, at the current
index. Remember, a string must end with a 0x00 byte. That's how
other functions know where the end of the string is.

Also, when you're putting characters into the buffer, you should check
if the current index will exceed the limits of the array. If so, don't put
any more chars in the array. If the array can hold 80 bytes, the last
available index value is 79 (in decimal). (The first index is 0).

[KamPutty]

[jaime]

I'm trying all morning and nothing..

here's my program... I can get out of my state 1. The program don't receive data. Can anyone help me??

Other problem is that i make
#define size 50 ;
char temp, buffer[size];

and the compiler said that is expecting a ] ?!?!?!?!?

Thanks just for read this...

---------------------------------------------------------------------------------
#include <16F628A.h>
#include <string.h>
#use delay (clock=20000000)
#use rs232(baud=9600, xmit=pin_b2, rcv=pin_b1)
#fuses HS, nowdt, put, nobrownout, mclr, nolvp

#define size 50 ;

short int ok=false, ring=false, busy=false, error=false, no_dial=false;
short int start_pack=false, stop_pack=false, middle_pack=false, ok_pack=false;
short int command_send=false, receive_pack=false;
int x=0, state=0;
char temp, buffer[50];

////////////////////////////////////////////////////////////////////////////////
#int_rda
void trata_rda()
{
/*
two examples that we can receive
LF CR O K CR LF
LF CR + C P B R: * * * CR LF O K CR LF
the program must detect only the LF if it's not CR or LF thw program puts in the buffer[x]
*/

temp=getc();

if(temp==0x0A)
{
if(!start_pack)
{
start_pack=true; //start of message
x=0;
}
else if(buffer[0]=='+')
{
if(!middle_pack) middle_pack=true;
else if(!ok_pack) ok_pack=true;
}
else
{
stop_pack=true; //end of message
receive_pack=true; //we got the message
buffer[x]=0;
}
}
else if((temp==!0x0D || temp==!0x0A) && (x<50))
{
buffer[x]=temp;
x++;
}

}

////////////////////////////////////////////////////////////////////////////////
void debug_data()
{
if (buffer[0]=='O' && buffer[1]=='K')
ok=true;
if (buffer[0]=='R' && buffer[1]=='I')
ring=true;
}


main()
{
while(1)
{
switch(state)
{
case 0: //state 0. led on. enable int
output_high(pin_b5);
delay_ms (2000);
enable_interrupts(int_rda);
enable_interrupts(global);
state=1;
break;
case 1: //state 1. ATE0. waits OK
if(!command_send)
{
printf("ATE0\r");
command_send=true;
}
else if(receive_pack)
{
disable_interrupts(int_rda);
disable_interrupts(int_timer1);
debug_data();
if(ok)
{
state=2;
command_send=false;
}
else if(error || busy || no_dial)
command_send=false;
}
break;
case 2: //state 2. AT+CALM=0. waits OK
if(!command_send)
{
printf("AT+CALM=0\r");
command_send=true;
}
else if(receive_pack)
{
disable_interrupts(int_rda);
disable_interrupts(int_timer1);
debug_data();
if(ok)
{
state=3;
command_send=false;
}
else if(error || busy || no_dial)
command_send=false;
}
break;
case 3: //state 3. AT+CVIB=0. waits OK
if(!command_send)
{
printf("AT+CVIB=0\r");
command_send=true;
}
else if(receive_pack)
{
disable_interrupts(int_rda);
disable_interrupts(int_timer1);
debug_data();
if(ok)
{
state=4;
command_send=false;
}
else if(error || busy || no_dial)
command_send=false;
}
break;
case 4: //state 4. led off.
output_low(pin_b5);
disable_interrupts(int_timer1);
while(!receive_pack)
{
#asm
nop
#endasm
}
while(receive_pack)
{
disable_interrupts(int_rda);
debug_data();
if(ring)
output_high(pin_a3); //only for teste
}
break;
}
}
}

[jaime]

this is why the CCS Forum is so good.

I post my program and i found my errors!!!!!!

well i still want to make the project so id anyone is interessed in help i apreciate!!!

thanks

[PCM programmer]