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

[Ole Reinhardt]

Hi Ulrich,

> _ioctl(_fileno(dev), UART_SETREADTIMEOUT, &t);

what's about the following code (more or less pseudo code)

u_long timeout = 500; // 500ms
u_long start_time;
u_long time_diff;
char   ch;

read_time = NutGetMillis();

while ((time_diff = NutGetMillis() - start_time) < timeout) {
	register u_long to = timeout - time_diff;
	_ioctl(_fileno(dev), UART_SETREADTIMEOUT, &to);
	ch = fgetc(dev);
	if (ch == the_char_to_search) break;
}

Bye,

Ole Reinhardt

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