Re: [avr-gcc-list] Problems with ATMEGA8 USART

[Hugo González Monteverde]

You have to be consistent with your frame format. How do you know when a 
  "command" begins and ends?  In any case you should use a terminating 
character for your command, such as CR, that triggers command 
interpretation and buffer clearing.

Can you post your initialization code and your ISR as well??? There may 
be something I'm not getting here. The actual hardware buffer is only 1 
byte, if I'm not mistaken...

Hugo

juan antonio jimenez martinez wrote:
> Hi, Im experimenting some details setting the ATMEGA8 usart, for 
> example, I have an interrupt driven routine for receiving data, may 
> problem is how can I clean the buffer in orther to let it ready for the 
> next reception, I mean, when I send  two chars from my computer to the 
> ATMEGA, the interrupt routine do what I want , but when I send 10 chars, 
> the buffer that I use to read the incomming data, reads the two chars 
> that I have send before plus the new data and as a result I got  the 10 
> chars message incomplete due the two chars that I have sent before
>
> I hope some one know an answer, because I have tryed with the RXC flag 
> and it seems not work,  or how can I select the sise in bytes to read at 
> one time, and again flush all the RX usart buffers
>
>
> thanks
>
> Jimenez
>
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