1 files changed, 81 insertions, 0 deletions
diff --git a/app/stdio.c b/app/stdio.c
new file mode 100644
index 0000000..286d4d2
--- /dev/null
+++ b/app/stdio.c
@@ -0,0 +1,81 @@
+#include "project.h"
+
+int
+_open (const char *name,
+       int         flags,
+       int         mode)
+{
+  errno = ENOSYS;
+  return -1;                    /* Always fails */
+
+}       /* _open () */
+
+int
+_close (int   file)
+{
+  errno = EBADF;
+  return -1;                    /* Always fails */
+
+}       /* _close () */
+
+int
+_write (int   file,
+        char *buf,
+        int   nbytes)
+{
+
+  int ret;
+
+
+  ret = usart6_write (buf, nbytes, 1);
+
+  if (ret < 0) {
+    errno = -ret;
+    return -1;
+  }
+
+  return ret;
+}       /* _write () */
+
+
+int
+_read (int   file,
+       char *buf,
+       int   nbytes)
+{
+
+  errno = -EAGAIN;
+  return -1;                          /* EOF */
+
+}       /* _read () */
+
+int
+_fstat (int          file,
+        struct stat *st)
+{
+  st->st_mode = S_IFCHR;
+  return  0;
+
+}       /* _fstat () */
+
+int
+_lseek (int   file,
+        int   offset,
+        int   whence)
+{
+  return  0;
+
+}       /* _lseek () */
+
+int
+isatty (int   file)
+{
+  return  1;
+
+}       /* _isatty () */
+
+
+void stdio_drain (void)
+{
+  usart6_drain();
+}