plz help me in activating the serial interrupt of at89c2051

[mohsin_032]

plz help me in actavting the serial interrupt of at89c2051

 

[bassa]

Re: plz help me in actavting the serial interrupt of at89c2051

Refer IE register

**broken link removed**

ES - enables or disables serial interrupt:

0 - UART system cannot generate an interrupt.
1 - UART system enables an interrupt.

 

[mohsin_032]

Re: plz help me in actavting the serial interrupt of at89c2051

thanks for reply...
but when i used at89c51 it works...when i used at89c2051 it does'nt work...
when i send sms ..i receive nothing....plz help me....

 

[bassa]

It is better if you can post your program to check further

 

[mohsin_032]

#include <reg2051.h>
#include <string.h>
#include <stdio.h>
#define CR 13
#define SUB 26
#define dot 46
sbit gps_en=P1^6;
void ms_delay(unsigned int t);
void cell_init();
void read_gps();
void read_str(unsigned char l1,unsigned char l2);
unsigned char recv_ser();
void send_cmd(unsigned char l1,unsigned char l2);
void send_msg();
void send_num();
void send_ser(unsigned char dat);
void del_msg();
void serial();
unsigned char cell_nubmer[13]="+923334705266";
unsigned char cmd[66]="AT+CMGF=1 AT+CNMI=2,1,0,0,0 AT+CMGR=1 AT+CMGD=1 AT+CMGS=,145 ALTO,";
unsigned char str[24]={0};

void ser_init()
{
SCON=0x50;
TMOD=0x20;
TH1=-6;
TR1=1;
}
void send_ser(unsigned char dat)
{
SBUF=dat;
while(TI==0);
TI=0;
}
unsigned char recv_ser()
{
unsigned char dat=0;
while(RI==0);
dat=SBUF;
while(RI==0);
RI=0;
return dat;
}
void read_str(unsigned char l1,unsigned char l2)
{
unsigned char loop=0;
for(loop=l1;loop<=l2;loop++)
str[loop]=recv_ser();
}
void read_gps()
{
start:
while('$'!=recv_ser());
read_str(0,5);
if((strncmp(str,"GPGGA",5))==0)
{
read_str(0,10); //avoid initial data of gps
read_str(0,23); //read earth co-ordinates
}
else
goto start;
}
void send_cmd(unsigned char l1,unsigned char l2)
{
unsigned char loop=0;
for(loop=l1;loop<=l2;loop++)
{ send_ser(cmd[loop]);
ms_delay(10);
}
}
void send_num()
{
unsigned char loop=0;
send_ser('"');
for(loop=0;loop<=12;loop++)
{
send_ser(cell_nubmer[loop]);
ms_delay(10);
}
send_ser('"');
}
void send_msg()
{
unsigned char loop;
send_cmd(0,8);
send_ser(CR);
ms_delay(1000);
send_cmd(48,55);
send_num();
send_cmd(56,59);
send_ser(CR);
ms_delay(500);
send_cmd(61,65);
for(loop=0;loop<=1;loop++)
{
send_ser(str[loop]);
ms_delay(10);
}
send_ser(dot);
for(loop=2;loop<=3;loop++)
{
send_ser(str[loop]);
ms_delay(10);
}
for(loop=5;loop<=9;loop++)
{
send_ser(str[loop]);
ms_delay(10);
}
for(loop=13;loop<=14;loop++)
{
send_ser(str[loop]);
ms_delay(10);
}
send_ser(dot);
for(loop=15;loop<=16;loop++)
{
send_ser(str[loop]);
ms_delay(10);
}
for(loop=18;loop<=21;loop++)
{
send_ser(str[loop]);
ms_delay(10);
}
send_ser(CR);
ms_delay(10);
send_ser(SUB);
send_ser(CR);
ms_delay(1000);
}
void serial(void)interrupt 4 .......... here is the problem.........
{
unsigned char loop=0,x='+';
if('+'==SBUF)

RI=0;
read_str(0,4);
ms_delay(1000);
if((strncmp(str,"+CMTI",5))==0)
{
ms_delay(500);
gps_en=1;
ms_delay(500);
gps_en=0;
ms_delay(500);
read_gps();
ms_delay(500);
gps_en=1;
send_msg();
//del_msg();
}
}
else
RI=0;
}
void del_msg()
{
unsigned char loop;
unsigned char loop1;
unsigned char i='1';
for(loop1=0;loop1<5;loop1++)
{
for(loop=38;loop<=45;loop++)
{
send_ser(cmd[loop]);
ms_delay(10);
}
send_ser(i);
ms_delay(10);
send_ser(13);
ms_delay(500);
i++;
}
ms_delay(1000);
}
void cell_init()
{
ms_delay(10000);
send_cmd(0,8);
ms_delay(10000);
send_cmd(0,8);
send_ser(CR);
ms_delay(1000);
send_cmd(10,26);
send_ser(CR);
ms_delay(1000);
del_msg();
}
void ms_delay(unsigned int t)
{
unsigned int j,k;
for(j=0;j<t;j++)
for(k=0;k<114;k++);
}

void main()
{

ser_init();
cell_init();

EA=1;
ES=1;
while(1)
{}




}

---------- Post added at 16:35 ---------- Previous post was at 16:26 ----------

my project name is gps gsm tracking system...when i send a sms to gsm module it should send me the coordinates...all the work is done only the interrupt problem...controller does not receive sms..plz help me...

 

[bassa]

Write EA=1; and ES=1; before cell_init(); routine

Also make sure that your circuit and check whether the correct pin connections when you use the same circuit for at89c51 and at89c2051

 

[mohsin_032]

i did it...but its not working...all the connections are same...is there any problem in controller...???

 

[bassa]

It is also possible if you have extra controllers. However check whether the serial send and receive functions work properly.