UART application on NEEK

I had already tried Hello and it worked. But I have more difficlulties when static or dynamic libraries are needed.

I use ocm_spi_mmu and I wonder if the uclibc is really used?

I can use under uClinux the ttyS0 device, for instance

> cat hello.txt > /dev/ttyS0

and it prints to RS232 port (connected to my PC).

Anyway, when I wrote a small C code for printing a sentence :

# include <stdio.h># include <string.h>

char msg[]="Bonjour le monde";

int main(void)

{

FILE *fp;

fp = fopen("/dev/ttyS0", "r+");

if(fp)

{

printf("Ouverture du port reussit\n");

fwrite(msg, strlen(msg), 1, fp);

fprintf(fp, "Closing the UART file.\n");

fclose(fp);

}

else

{

printf("Erreur à l ouverture de /dev/ttyS0\n");

return (1);

}

return(0);

}

The code is correct (I can not tested on my PC) ?

I have no error and receive nothing at RS232 port ???

Is there a conflict with the ttyS0 already open at kernel level?

thanks