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Problem capturing keys of showing in PRINTF

 
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omarsito12



Joined: 02 Oct 2009
Posts: 6

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Problem capturing keys of showing in PRINTF
PostPosted: Thu Feb 25, 2010 1:50 pm     Reply with quote
I need to capture 11 keypad digits and store them in a matrix of type char array of 11 positions (char n [11]) and then print this char [] by "printf" to talk with the GSM modem. Because I am making a communication PIC - ModemGSM but got many wrong and ugly symbols. I am seeing them by hyperterminal, which actually I use it only to see the conversation between the modem and the pic. my code is:
Code:

#include<18f97j60.h>
#device adc=10
#fuses HS, NODEBUG, NOWDT, NOPROTECT, NOIESO, NOETHLED
#FUSES
#use delay(CLOCK=25000000)
#use rs232(baud=115200,parity=N,bits=8,stop=1,xmit=PIN_C6,rcv=PIN_C7,enable=PIN_C5,errors)

#include<stdlib.h>
#include<string.h>
#include<stdio.h>
#include<flexy_lcd.c>
#include<flexy_kbd.c>
//////////*************MENSAJE GSM******************////////////

void msj_gsm()
{
char k,num;
char n[11];

int i;
int state=1;
lcd_init();
kbd_init();

while(true){
switch(state){

case 1:
i=0;
lcd_putc("\fPress numbers:\n#: ");

while(i<=10){   //captures 11 number or digits
  k=kbd_getc();  //waits for the keyboard been pressed
    if(k!=0){    ///if press the keyboard
      if(k=='#'){
        lcd_putc("\fExit\n");
      }else{  //when I press a number... get in here
        n[i]=k; //save the key pressed on keyboard, saving it in "n", but in the position of 'i'...of course!!!
        lcd_putc(k);//prints by the display
        ++i; ///move 'i' position
      }
   }
}
default 2:

printf("AT+CMGS=\"%s\"",n);//prints n
delay_ms(2000);
putc (0x0D);//enter
state=1;
break;
}
}
}
}

I dont get it nothing well in hyperterminal...
Quote:

ERROR
04445015555555555

ERROR
5
ý}}5555555555
2 5"AT+CMGS="88888888888
2 8"

I even tried to change the baud rate but I still do not have anything ...besides the modem works fine, I tried sending text messages, calls and even from a little program in java that I created, I can control it all. I work more on java, which is the reason why this language seems to me a little difficult ... in java STRINGS handling is very common, but here... I'm lost ....
So I dont know how to capture all keys pressed and show them by printf for the modem GSM....
Please help ... I gonna defend thesis in a few days and this is what is missing ... Thanks
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Thu Feb 25, 2010 2:31 pm     Reply with quote
Quote:

#include<flexy_kbd.c>

k=kbd_getc(); //waits for the keyboard been pressed

Does your keypad driver come from here, in the Code Library ?
http://www.ccsinfo.com/forum/viewtopic.php?t=26333
If so, the comment is wrong. It does not wait for a key.

To fix it, add this routine above main():
Code:

// Wait for a key to be pressed.  Then return it.
char keypad_getc(void)
{
char k;

while(1)
  {
   k = kbd_getc();
   if(k != 0)
      break;   
   
   delay_ms(10);
  }

return(k);
}

Then edit your program. Change the kbd_getc() line to call
keypad_getc() instead, as shown in bold below:
Quote:

while(i<=10){ //captures 11 number or digits
k=keypad_getc(); //waits for the keyboard been pressed
if(k!=0){ ///if press the keyboard
if(k=='#'){
lcd_putc("\fExit\n");
}else{ //when I press a number... get in here
n[i]=k; //save the key pressed on keyboard, saving it in "n", but in the position of 'i'...of course!!!
lcd_putc(k);//prints by the display
++i; ///move 'i' position
}
}
}
Wayne_



Joined: 10 Oct 2007
Posts: 681

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PostPosted: Fri Feb 26, 2010 2:56 am     Reply with quote
Another problem is that a string in c needs to be a null terminated aray of chars. You have the array and you fill it but you don't null terminate it. This is very easy to do.

First make sure you allocate 1 extra char in your array for the null '\0' or 0 char.
Then just set this when you have recieved your data:-

Code:

char n[12];


case 1:
i=0;
lcd_putc("\fPress numbers:\n#: ");

while(i<=10){   //captures 11 number or digits
  k=kbd_getc();  //waits for the keyboard been pressed
    if(k!=0){    ///if press the keyboard
      if(k=='#'){
        lcd_putc("\fExit\n");
      }else{  //when I press a number... get in here
        n[i]=k; //save the key pressed on keyboard, saving it in "n", but in the position of 'i'...of course!!!
        lcd_putc(k);//prints by the display
        ++i; ///move 'i' position
      }
   }
}
n[i] = 0;    // Null terminate the string.

default 2:


Your output is also a little confusing.

What is outputting the "ERROR" ?
How can you enter more than 11 chars "04445015555555555" ?
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