--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cs/system/bootloader/inc/serial.h	Fri May 15 01:28:16 2020 +0000
@@ -0,0 +1,46 @@
+/*******************************************************************************
+ *
+ * SERIAL.H
+ *
+ * This module contains functions to send or receive commands on the USART 8251.
+ * Only polled mode is used.
+ * 
+ * (C) Texas Instruments 1998
+ *
+ ******************************************************************************/
+
+#ifndef __SERIAL_H__
+#define __SERIAL_H__
+
+#include "main/sys_types.h"
+
+/*
+ * ser_receive_command and ser_receive_char have 2 modes:
+ *      SER_INFINITE : Waits until a command is received.
+ *      SER_IMMEDIATE: Returns imediately even if no character is received.
+ */
+
+enum {
+    SER_INFINITE,
+    SER_IMMEDIATE
+};
+
+/*
+ * Return values of ser_receive_data_for_flash.
+ */
+
+enum {
+    SER_DATA_READY,
+    SER_DATA_ERROR,
+    SER_END_OF_FILE
+};
+
+extern void ser_wait_no_activity (SYS_UWORD8 device_id);
+extern long ser_send_command (SYS_UWORD8 *command, SYS_UWORD8 device_id);
+extern SYS_UWORD8 ser_receive_command (SYS_UWORD8 *command, int mode);
+extern long ser_receive_data_for_flash (SYS_UWORD32 *address, SYS_UWORD16 *data, SYS_UWORD8 device_id);
+extern void ser_initialize_flash_data_detection (void);
+extern void ser_initialize_serial_link (void);
+extern void ser_wait_last_character_sent (SYS_UWORD8 device_id);
+
+#endif /* __SERIAL_H__ */
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