1 /* This source file is part of the ATMEL FREERTOS-0.9.0 Release */
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3 /*This file is prepared for Doxygen automatic documentation generation.*/
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4 /*! \file *********************************************************************
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6 * \brief System-specific implementation of the \ref __write function used by
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7 the standard library.
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9 * - Compiler: IAR EWAVR32
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10 * - Supported devices: All AVR32 devices with a USART module can be used.
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13 * \author Atmel Corporation: http://www.atmel.com \n
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14 * Support email: avr32@atmel.com
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16 ******************************************************************************/
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18 /* Copyright (c) 2007, Atmel Corporation All rights reserved.
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20 * Redistribution and use in source and binary forms, with or without
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21 * modification, are permitted provided that the following conditions are met:
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23 * 1. Redistributions of source code must retain the above copyright notice,
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24 * this list of conditions and the following disclaimer.
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26 * 2. Redistributions in binary form must reproduce the above copyright notice,
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27 * this list of conditions and the following disclaimer in the documentation
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28 * and/or other materials provided with the distribution.
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30 * 3. The name of ATMEL may not be used to endorse or promote products derived
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31 * from this software without specific prior written permission.
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33 * THIS SOFTWARE IS PROVIDED BY ATMEL ``AS IS'' AND ANY EXPRESS OR IMPLIED
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34 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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35 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY AND
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36 * SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT,
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37 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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38 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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39 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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40 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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41 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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42 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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47 #include <avr32/iouc3a0512.h>
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54 #pragma module_name = "?__write"
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57 //! Pointer to the base of the USART module instance to use for stdio.
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58 __no_init volatile avr32_usart_t *volatile stdio_usart_base;
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61 /*! \brief Writes a number of bytes, at most \a size, from the memory area
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62 * pointed to by \a buffer.
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64 * If \a buffer is zero then \ref __write performs flushing of internal buffers,
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65 * if any. In this case, \a handle can be \c -1 to indicate that all handles
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66 * should be flushed.
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68 * \param handle File handle to write to.
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69 * \param buffer Pointer to buffer to read bytes to write from.
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70 * \param size Number of bytes to write.
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72 * \return The number of bytes written, or \c _LLIO_ERROR on failure.
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74 size_t __write(int handle, const unsigned char *buffer, size_t size)
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80 // This means that we should flush internal buffers.
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84 // This implementation only writes to stdout and stderr.
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85 // For all other file handles, it returns failure.
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86 if (handle != _LLIO_STDOUT && handle != _LLIO_STDERR)
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91 for (; size != 0; --size)
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93 if (usart_putchar(stdio_usart_base, *buffer++) < 0)
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