stm32f4-nucleo-test/libopencm3/tests/shared/trace_stdio.c

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/*
* support for stdio output to a trace port
* Karl Palsson, 2014 <karlp@remake.is>
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include "trace.h"
#ifndef STIMULUS_STDIO
#define STIMULUS_STDIO 0
#endif
int _write(int file, char *ptr, int len);
int _write(int file, char *ptr, int len)
{
int i;
if (file == STDOUT_FILENO || file == STDERR_FILENO) {
for (i = 0; i < len; i++) {
if (ptr[i] == '\n') {
trace_send_blocking8(STIMULUS_STDIO, '\r');
}
trace_send_blocking8(STIMULUS_STDIO, ptr[i]);
}
return i;
}
errno = EIO;
return -1;
}