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/* ==========================================================================
Licensed under BSD 2clause license See LICENSE file for more information
Author: Michał Łyszczek <michal.lyszczek@bofc.pl>
========================================================================== */
#include "embedlog.h"
#include <termios.h>
int main(void)
{
/*
* first we nned to initialize logger to known state
*/
el_init();
/*
* to use logger you need to enable at least one output, without it logs
* will be printed to /dev/null. Here we set output to serial device.
*/
el_option(EL_OUT, EL_OUT_TTY);
/*
* enbaling tty output is not enough, we still need to configure which
* device we want to use and at what speed. Transmission parameters are
* 8N1 by default. Baudrate should be taken from termios (3).
*/
if (el_option(EL_TTY_DEV, "/dev/ttyUSB1", B9600) != 0)
{
perror("tty set failed");
return 1;
}
/*
* now we can simply print messages like we would do it with ordinary
* printf - we just need to log level macro as a first argument
*/
el_print(ELI, "Info message");
el_print(ELF, "Fatal message with additional argument %d", 42);
el_print(ELD, "Debug message that won't be printed due to log level");
/*
* we can change log level in runtime as we see fit, now enable debug
* prints
*/
el_option(EL_LEVEL, EL_DBG);
el_print(ELD, "But now debug will be printed");
/*
* altough embedlog does not use dynamic allocation by itself, system may
* allocate some resources (like opened file descriptors when printing to
* file), with el_cleanup, we can make sure all resources are freed. In
* this example, this function will close opened tty file descriptor.
*/
el_cleanup();
return 0;
}
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