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T290i with Pic16f628


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turker1

Sun Aug 10 2008, 08:01AM

Registered Member #6471

Joined: Wed Mar 05 2008, 11:52PM

Posts: 69
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Hi again. I connected T290i with pc. I get "OK" from hyperterminal.And I connect phone to mcu.

CODE:

#include <16F628.h>

#use delay(clock=4000000)

#use rs232(baud=9600,parity=N,xmit=PIN_A2,rcv=PIN_A1,bits=8)

void main()

{

printf("AT\r\n");

delay_ms(1000);

printf("ATD8091\r\n");

}

This code calling 8091 . i tried it is ok.
But when i want to get result a command , i cant.

CODE:

#include <16F628.h>

#use delay(clock=4000000)

#use rs232(baud=9600,parity=N,xmit=PIN_A2,rcv=PIN_A1,bits=8)

void main()

{

printf("AT\r\n");

if (getc()=='O') output_high(PIN_A0);

}

For this code I sent "AT" .So the message "OK" came. The first letter "O". The mcu doesnt output PIN_A0 high.
I think the problem is speed. MCU or phone is faster than the other one. How can i solve this problem.
Thanks for advice.

electronic lover

16f628 delay ms ms 40 output pin xmit

turker1

Sun Aug 10 2008, 02:08PM

Registered Member #6471

Joined: Wed Mar 05 2008, 11:52PM

Posts: 69
Thanked 0 times in 0 posts

Hi.One more thing , if i use max232 i cant send commands. first codes doesnt work if i use max232.
maybe i must use resistors with mcu and phone?

electronic lover

mcu resistors

Ajay

Mon Aug 11 2008, 01:21AM

Rickey's World Admin

Registered Member #1

Joined: Fri Feb 24 2006, 04:56AM

Posts: 4042
Thanked 752 times in 711 posts

you dont get OK as it is.. modem sends string in this way..

\r\nOK\r\n

so you need to check for the above received chars for correct response.

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correct response chars modem nok

turker1

Mon Aug 11 2008, 04:03AM

Registered Member #6471

Joined: Wed Mar 05 2008, 11:52PM

Posts: 69
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With this code sometimes nothing appears on LCD, sometimes 'e' appears, sometimes 'ATe' appears. What is the problem?I used "lcd_putc("e");" to see what happens.

CODE:

include <16F628.h>

#use delay(clock=4000000)

#define use_portb_lcd TRUE

#include <LCD.C>

#use rs232(baud=9600,parity=N,xmit=PIN_A2,rcv=PIN_A1,bits=8)

char s[30];

void main()

{

lcd_init();

printf("ATE0\r\n");

delay_ms(1000);

printf("AT\r\n");

gets(s);

printf(lcd_putc,s);

lcd_putc("e");

}