git subrepo clone https://github.com/libopencm3/libopencm3.git

subrepo:
  subdir:   "libopencm3"
  merged:   "88e91c9a7cce"
upstream:
  origin:   "https://github.com/libopencm3/libopencm3.git"
  branch:   "master"
  commit:   "88e91c9a7cce"
git-subrepo:
  version:  "0.4.3"
  origin:   "???"
  commit:   "???"

libopencm3/tests/shared/trace.c

@@ -0,0 +1,57 @@
+#include <stdint.h>
+#include <libopencm3/cm3/common.h>
+#include <libopencm3/cm3/memorymap.h>
+#include <libopencm3/cm3/itm.h>
+#include "trace.h"
+
+void trace_send_blocking8(int stimulus_port, char c)
+{
+	if (!(ITM_TER[0] & (1<<stimulus_port))) {
+		return;
+	}
+	while (!(ITM_STIM8(stimulus_port) & ITM_STIM_FIFOREADY));
+	ITM_STIM8(stimulus_port) = c;
+}
+
+void trace_send8(int stimulus_port, char val)
+{
+	if (!(ITM_TER[0] & (1<<stimulus_port))) {
+		return;
+	}
+	ITM_STIM8(stimulus_port) = val;
+}
+
+void trace_send_blocking16(int stimulus_port, uint16_t val)
+{
+	if (!(ITM_TER[0] & (1<<stimulus_port))) {
+		return;
+	}
+	while (!(ITM_STIM16(stimulus_port) & ITM_STIM_FIFOREADY));
+	ITM_STIM16(stimulus_port) = val;
+}
+
+void trace_send16(int stimulus_port, uint16_t val)
+{
+	if (!(ITM_TER[0] & (1<<stimulus_port))) {
+		return;
+	}
+	ITM_STIM16(stimulus_port) = val;
+}
+
+
+void trace_send_blocking32(int stimulus_port, uint32_t val)
+{
+	if (!(ITM_TER[0] & (1<<stimulus_port))) {
+		return;
+	}
+	while (!(ITM_STIM32(stimulus_port) & ITM_STIM_FIFOREADY));
+	ITM_STIM32(stimulus_port) = val;
+}
+
+void trace_send32(int stimulus_port, uint32_t val)
+{
+	if (!(ITM_TER[0] & (1<<stimulus_port))) {
+		return;
+	}
+	ITM_STIM32(stimulus_port) = val;
+}

libopencm3/tests/shared/trace.h

@@ -0,0 +1,32 @@
+/*
+ * File:   trace.h
+ * Author: karlp
+ *
+ * Created on November 21, 2013, 4:35 PM
+ */
+
+#ifndef TRACE_H
+#define	TRACE_H
+
+#include <stdint.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+void trace_send_blocking8(int stimulus_port, char c);
+void trace_send8(int stimulus_port, char c);
+
+void trace_send_blocking16(int stimulus_port, uint16_t val);
+void trace_send16(int stimulus_port, uint16_t val);
+
+void trace_send_blocking32(int stimulus_port, uint32_t val);
+void trace_send32(int stimulus_port, uint32_t val);
+
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* TRACE_H */
+

libopencm3/tests/shared/trace_stdio.c

@@ -0,0 +1,34 @@
+/*
+ * 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;
+}
+
+