[En-Nut-Discussion] How to write character filter with timeout?

Harald Kipp harald.kipp at egnite.de
Thu Aug 20 09:31:04 CEST 2009

Hi Ulrich,

Ulrich Prinz wrote:

> _ioctl(_fileno(dev), UART_SETREADTIMEOUT, &t);
> Is there a non-blocking function for fgetc() or do I have to do stream 
> parsing or is there any easier way?

When you set a read timeout on a specific device, then the related
fgetc() on that device will be non-blocking. When -1 is returned, you
can use feof() or ferror() to distinguish between timeout (end of file)
or error.



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