[En-Nut-Discussion] Loosing characters on debug interface (uart) using printf

Ole Reinhardt ole.reinhardt at kernelconcepts.de
Mon Jun 7 15:07:29 CEST 2004


Hi,

I noticed a strange behavior of Nut/Os when I'm using printf.

I first register devDebug0 and assign it as stdout:

NutRegisterDevice(&devDebug0, 0, 0);
freopen("uart0", "w", stdout);
_ioctl(_fileno(stdout), UART_SETSPEED, &baud);

When I now use printf the output is written to uart0. But I often loose
characters or even whole strings. Especially while producing high output
traffic.

Is this a known problem or normal behavior? Any fixes or workarounds?

Regards,

Ole Reinhardt

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