Move print/debug files to quantum (#12069)

* move print/debug files to quantum

* Update comments

1 files changed, 33 insertions, 0 deletions

diff --git a/quantum/logging/sendchar.h b/quantum/logging/sendchar.h
new file mode 100644
index 0000000000..edcddaa6bb
--- /dev/null
+++ b/quantum/logging/sendchar.h
@@ -0,0 +1,33 @@
+/*
+Copyright 2011 Jun Wako <wakojun@gmail.com>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#pragma once
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef int8_t (*sendchar_func_t)(uint8_t c);
+
+/* transmit a character.  return 0 on success, -1 on error. */
+int8_t sendchar(uint8_t c);
+
+#ifdef __cplusplus
+}
+#endif