In Nordic mesh sdk 2.2:
void log_callback_stdout(uint32_t dbg_level, const char * p_filename, uint16_t line,
uint32_t timestamp, const char * format, va_list arguments)
{
printf("<t: %10u>, %s, %4d, ",timestamp, p_filename, line);
(void) vprintf(format, arguments);
}
Where can I find definition of printf and vprintf?
Do they use UART on chip?