AVR-Chat

thanks for your help
actually i don't use interrupt
and if it didn't receive data , i want it to skip the getchar command
so can i use

if(getchar())        //instead of if(rx_counter0)
{
ch = getchar();
}


On 7/8/11, Dave McLaughlin <dave_mclaughlin@nerdshack.com> wrote:
> Hi there,
>
>
>
> I am assuming you are using an interrupt driven serial port here? Best
> option by the way as it gets filled under interrupts so less likely to lose
> data. The following applies if this is turned on.
>
>
>
> You need to check the variable rx_counter0 (check your code for the correct
> name) before calling getchar()
>
>
>
> If this is non-zero it indicates there is data in the buffer.
>
>
>
> if(rx_counter0)
>
> {
>
>           ch = getchar();
>
> }
>
>
>
> You can actually check this for a certain value if you happen to know the
> length of the data otherwise, you have to deal with variable length input.
>
>
>
> Hope this helps?
>
> Dave.
>
>
>
> From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf
> Of Ahmed Mostafa
> Sent: 08 July 2011 01:40
> To: AVR-Chat@yahoogroups.com
> Subject: [AVR-Chat] time of getchar
>
>
>
>
>
> command "getchar()"
> if it didn't receive serial data
> does it skips this command or what
> and if it skips it , how long does it take
> since this command "getchar()" is executed until it skips it ?
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
>