http://www.8051projects.net/ Learn to make simple microcontroller projects, pic, 8051, avr and arm projects. download 8051 projects, tutorials, libraries, sample codes. join the microcontroller discussion forum and ask doubts regarding electronics. the best source for 8051 over internet. en-gb 2009-01-08T05:45:52-08:00 contact@nospam.com hourly 1 2000-01-01T12:00+00:00 http://www.8051projects.net/forum-t14695.html 2009-01-08T05:45:52-08:00 Hello I have been trying to interface PIC16F877 with Sony Ericsson T610 but i cant. For a start up Iam just sending AT to the phone but i dont receive "OK" Iam using the serial data cable for the phone directly connected to the serial of the PIC http://www.8051projects.net/forum-t14695.html 2009-01-08T05:45:52-08:00 Ajay Hi Izzal, Please provide the code will be easy to help.. http://www.8051projects.net/forum-t14695.html 2009-01-08T05:45:52-08:00 ExperimenterUK According to Wikipedia and others,the 610 has Bluetooth ,Infrared and USB.None of which are practical to connect to a PIC16F877.I have seen no mention of a serial connection able to connect to a PC's serial port. http://www.8051projects.net/forum-t14695.html 2009-01-08T05:45:52-08:00 Izzal Hello Ajay thanks for your replyI have attached the code http://www.8051projects.net/forum-t14695.html 2009-01-08T05:45:52-08:00 Ajay ExperimenterUK, PC has got all that where as a tiny 8051 has just got a serial port so thats the only available option http://www.8051projects.net/forum-t14695.html 2009-01-08T05:45:52-08:00 Izzal Sorry the code is as followsCODE:#include <16F877.h>#device *=16 // This allows auto variables over location 0xFF and set
#use delay(clock=4000000)
#fuses XT,NoWDT
#use rs232 (baud = 9600, BITS = 8, parity = N, rcv = PIN_c6, xmit = PIN_c7)
#opt 9
#include "lcd_driver.c"
#include<string.h>main (){

char str[3], okay[10];
char c[2];
int i;

 lcd_init();  // Initialise the LCD
 lcd_putc('\f');  // clear the screen

  lcd_putc("WELCOME"); // to test for LCD
  delay_ms(2000);
  lcd_putc('\f');

printf("AT");
putc(13);
putc(10);


for (i=0 ; i<4 ; i++)
{   c[i] = getc();
    delay_ms(5);

}


delay_ms(100);

 for(i=0; i < 4 ; i++)
    {
     lcd_putc(c[i]);     // Show what the phone sends on LCD
     delay_ms(100);
    }
}
  http://www.8051projects.net/forum-t14695.html 2009-01-08T05:45:52-08:00 ExperimenterUK Ajay wrote ...ExperimenterUK, PC has got all that where as a tiny 8051 has just got a serial port so thats the only available option I meant was that as far as I can see this phone has no serial port meant for AT commandtype communication.It may have a serial link for flashing and special purposes, but that is not clear from what I have seen.Of course Izzal's method may be fine, but it is worth checking before going further. http://www.8051projects.net/forum-t14695.html 2009-01-08T05:45:52-08:00 Ajay Pinouts says it has serial output, and my friends have used that phone in a project. Also people on forum like Abbas has used it too. So probably it has serial output http://www.8051projects.net/forum-t14695.html 2009-01-08T05:45:52-08:00 Izzal Hello.. Thanks for your reply..Therefore I have to try with a lower voltage MAX232. I think MAX232 also inverts the data bit. Please correct me if i'am wrong. Thanks I am working on it now http://www.8051projects.net/forum-t14695.html 2009-01-08T05:45:52-08:00 Izzal The Phone has serial output. I have already tested the AT-Commands using PC (Tera Term software) and it works fine. So after that I tried it with PIC16F877 but i could not communicate. I used MAX232 between the phone and PIC communication when it didnt work I used Transistor circuit but both methods failed. http://www.8051projects.net/forum-t14695.html 2009-01-08T05:45:52-08:00 ExperimenterUK OK I'm convinced A couple of points to consider, (actually three).The 610 interface is 3 volts so may need a low voltage MAX232.The data bits may need to be inverted.I have seen the baud rate for the 610 given as 9600 and 115200.An XP "9600" baud modem actually defaults to a com port speed of 115200. http://www.8051projects.net/forum-t14695.html 2009-01-08T05:45:52-08:00 Ajay Max232 do not involve data inversion, but its just a bus driver.for lower voltage you can make use of Max3232 works on 3V check datasheet for more info http://www.8051projects.net/forum-t14695.html 2009-01-08T05:45:52-08:00 Izzal I have designed MAX 232 circuit still the same thing.. What to do now Ajay , Experiment UK .. http://www.8051projects.net/forum-t14695.html 2009-01-08T05:45:52-08:00 ExperimenterUK OK no problem Have you got the PIC to talk to the PC using Hyperterminal.I'd rather you used Hyperterminal as we all have that.If no.. then please do that now If yes, were the settings identical to those used to talk to the T610 ? http://www.8051projects.net/forum-t14695.html 2009-01-08T05:45:52-08:00 Ajay are you using a datacable? to connect your phone with PIC? http://www.8051projects.net/forum-t14695.html 2009-01-08T05:45:52-08:00 gambler_2006 plz help me outi m new in this field i want to interface mobile to controllercan u tell me how http://www.8051projects.net/forum-t14695.html 2009-01-08T05:45:52-08:00 Izzal Yes Iam using the data cable for the phone to connect to the PIC. My PIC can talk with PC, and also Phone to PC, but not PIC to Phone.Hey gambler i will let u know if mine is workingThanks http://www.8051projects.net/forum-t14695.html 2009-01-08T05:45:52-08:00 Izzal My setting are Identical to the one with hyperterminal. What else could be the problem. http://www.8051projects.net/forum-t14695.html 2009-01-08T05:45:52-08:00 ExperimenterUK Izzal wrote ...Yes Iam using the data cable for the phone to connect to the PIC. My PIC can talk with PC, and also Phone to PC, but not PIC to Phone.Hey gambler i will let u know if mine is workingThanksOK there must be something you are missing here.If things were as you see them the system would work When connecting the PIC to the PC does the PIC send ATcr/lf and what happens when you send OK cr/lf back.Using hyperterminal can you be talking to the phone, then unplug the phone, connect the PIC and carry on with no other changes.Install the trial version of port logging software from here to see the detailsof what is happening.http://www.hhdsoftware.com/Products/home/serial-monitor.htmlIf you can do all these things, make up a back to back crossover connector for the D9 plugs.Your data cable may have a built in MAX232 which draws its power from the PC serial port.You will have to supply this power when looped back or connected to the PIC board.Generally PC output pins such as DTR etc are expected to be at +12 volts http://www.8051projects.net/forum-t14695.html 2009-01-08T05:45:52-08:00 Izzal Thanks very much Experiment UK!! I really appreciate it.. Currently iam working on what you that told me.. thanks again. Will let you know the results http://www.8051projects.net/forum-t14695.html 2009-01-08T05:45:52-08:00 Izzal Hello using the software Experiment UK advised me to use I have noticed the phone sends ..OK.. not straight OK . So i tried changing my codes to get in ..OK.. however I cant get. Still the same problem. what now..