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diff --git a/test_src/uart_i.h b/test_src/uart_i.h
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+++ b/test_src/uart_i.h
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+/* uart_i.h */
+/*
+    This file is part of the AVR-uart_ni.
+    Copyright (C) 2009  Daniel Otte (daniel.otte@rub.de)
+
+    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 3 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/>.
+*/
+/**
+ * \file     uart_i.h
+ * \email    daniel.otte@rub.de
+ * \author   Daniel Otte 
+ * \date     2009-07-24
+ * \license  GPLv3 or later
+ * \ingroup  uart_i
+ * \brief    declaration for non-interrupt uart
+ */
+
+#ifndef UART_I_H_
+#define UART_I_H_
+
+#include "config.h"
+#include "circularbytebuffer.h"
+#include <stdint.h>
+
+typedef struct{
+	circularbytebuffer_t rxb;
+	circularbytebuffer_t txb;	
+#if UART0_HOOK
+	void(*hook)(uint8_t);
+	volatile uint8_t hook_running;
+#endif
+#if UART0_SWFLOWCTRL
+	volatile uint8_t txon;
+	volatile uint8_t rxon;
+#endif
+} uart0_ctx_t;
+
+
+typedef struct{
+	circularbytebuffer_t rxb;
+	circularbytebuffer_t txb;	
+#if UART1_HOOK
+	void(*hook)(uint8_t);
+	volatile uint8_t hook_running;
+#endif
+#if UART1_SWFLOWCTRL
+	volatile uint8_t txon;
+	volatile uint8_t rxon;
+#endif
+} uart1_ctx_t;
+
+#if UART0_I
+
+/** \fn uart0_init(void)
+ * \brief initialize uart0.
+ * This function initializes the first uart according to the parameter specifyed
+ * in config.h .
+ */
+void uart0_init(void);
+
+/** \fn uart0_putc(uint16_t)
+ * \brief send data through uart0.
+ * This function sends data through the first uart 
+ * (the data size is debfined in config.h).
+ * \param c data to send
+ */
+void uart0_putc(uint16_t c);
+
+/** \fn uart0_getc(void)
+ * \brief read data from uart0.
+ * This function reads data from the first uart 
+ * (the data size is debfined in config.h).
+ * \return data recived by uart0
+ */
+uint16_t uart0_getc(void);
+
+/** \fn uart0_dataavail(void)
+ * \brief checks if data is available.
+ * 
+ * This function checks the state of the input buffer of uart0 and
+ * returns if data is available or not.
+ * \return zero if no data is available else a value different from zero is returned
+ */
+uint8_t uart0_dataavail(void);
+
+#if	UART0_HOOK
+void uart0_sethook(void(*fpt)(uint8_t));
+#endif
+
+
+#endif /* UART0_I */
+
+#if UART1_I
+/** \fn uart1_init(void)
+ * \brief initialize uart1.
+ * This function initializes the second uart according to the parameter specifyed
+ * in config.h .
+ */
+void uart1_init(void);
+
+/** \fn uart1_putc(uint16_t)
+ * \brief send data through uart1.
+ * This function sends data through the second uart 
+ * (the data size is debfined in config.h).
+ * \param c data to send
+ */
+void uart1_putc(uint16_t c);
+
+/** \fn uart1_getc(void)
+ * \brief read data from uart1.
+ * This function reads data from the second uart 
+ * (the data size is debfined in config.h).
+ * \return data recived by uart1
+ */
+uint16_t uart1_getc(void);
+
+/** \fn uart1_dataavail(void)
+ * \brief checks if data is available.
+ * This function checks the state of the input buffer of uart1 and
+ * returns if data is available or not.
+ * \return zero if no data is available else a value different from zero is returned
+ */
+uint8_t uart1_dataavail(void);
+
+void uart0_sethook(void(*fpt)(uint8_t));
+#endif
+
+#endif /* UART_I_H_ */