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8051 Gsm Interfacing

hi

i wanted to know how exactly handshaking signals (RTS and CTS) be included in the program.

we are using a wavecom modem that use AT commands.

we have also included MAX232 for ttl to rs232 conversion.

command to accept call is ATA. i wanted to know whether to trasmit ATA command as a string through Serial port(TXD) or transmit chatracters A,T,A separately or is there some other equivalent code that is being transmitted when using the hyperterminal

Thanks

Parents
  • i have developed a program for blinking LED which is

    i am not getting the syntax right here please manage
    to read through this

    while(1)
    {

    LED=~LED;//LED is sbit LED=P1.0 defined earlier//
    delay(); // delay is subroutine defined to be delay of .5 seconds have used timer1 for delay of 50ms then a for loop for 21 loop approx .5 seconds
    }

    this works fine but this program doesn't

    this is for blinking LED 5times then stop

    for(k=1,k<=10;k++)
    { LED=~LED; delay();
    }

    note that there is no overall while loop in second case

    will this effect the result when i am implementing
    in hardware not in keil

Reply
  • i have developed a program for blinking LED which is

    i am not getting the syntax right here please manage
    to read through this

    while(1)
    {

    LED=~LED;//LED is sbit LED=P1.0 defined earlier//
    delay(); // delay is subroutine defined to be delay of .5 seconds have used timer1 for delay of 50ms then a for loop for 21 loop approx .5 seconds
    }

    this works fine but this program doesn't

    this is for blinking LED 5times then stop

    for(k=1,k<=10;k++)
    { LED=~LED; delay();
    }

    note that there is no overall while loop in second case

    will this effect the result when i am implementing
    in hardware not in keil

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