2 * FreeRTOS Kernel V10.5.0
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3 * Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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5 * SPDX-License-Identifier: MIT AND BSD-3-Clause
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7 * Permission is hereby granted, free of charge, to any person obtaining a copy of
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8 * this software and associated documentation files (the "Software"), to deal in
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9 * the Software without restriction, including without limitation the rights to
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10 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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11 * the Software, and to permit persons to whom the Software is furnished to do so,
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12 * subject to the following conditions:
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14 * The above copyright notice and this permission notice shall be included in all
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15 * copies or substantial portions of the Software.
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17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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19 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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20 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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21 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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24 * https://www.FreeRTOS.org
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25 * https://github.com/FreeRTOS
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29 /*This file is prepared for Doxygen automatic documentation generation.*/
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30 /*! \file *********************************************************************
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32 * \brief System-specific implementation of the \ref __read function used by
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33 the standard library.
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35 * - Compiler: IAR EWAVR32
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36 * - Supported devices: All AVR32 devices with a USART module can be used.
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39 * \author Atmel Corporation (Now Microchip):
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40 * https://www.microchip.com \n
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41 * Support and FAQ: https://www.microchip.com/support/
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43 ******************************************************************************/
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46 * Copyright (c) 2007, Atmel Corporation All rights reserved.
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48 * Redistribution and use in source and binary forms, with or without
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49 * modification, are permitted provided that the following conditions are met:
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51 * 1. Redistributions of source code must retain the above copyright notice,
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52 * this list of conditions and the following disclaimer.
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54 * 2. Redistributions in binary form must reproduce the above copyright notice,
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55 * this list of conditions and the following disclaimer in the documentation
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56 * and/or other materials provided with the distribution.
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58 * 3. The name of ATMEL may not be used to endorse or promote products derived
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59 * from this software without specific prior written permission.
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61 * THIS SOFTWARE IS PROVIDED BY ATMEL ``AS IS'' AND ANY EXPRESS OR IMPLIED
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62 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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63 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY AND
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64 * SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT,
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65 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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66 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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67 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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68 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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69 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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70 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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75 #include <avr32/io.h>
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82 #pragma module_name = "?__read"
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85 extern volatile avr32_usart_t *volatile stdio_usart_base;
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88 /*! \brief Reads a number of bytes, at most \a size, into the memory area
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89 * pointed to by \a buffer.
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91 * \param handle File handle to read from.
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92 * \param buffer Pointer to buffer to write read bytes to.
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93 * \param size Number of bytes to read.
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95 * \return The number of bytes read, \c 0 at the end of the file, or
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96 * \c _LLIO_ERROR on failure.
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98 size_t __read(int handle, uint8_t *buffer, size_t size)
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102 // This implementation only reads from stdin.
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103 // For all other file handles, it returns failure.
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104 if (handle != _LLIO_STDIN)
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106 return _LLIO_ERROR;
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109 for (; size > 0; --size)
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111 int c = usart_getchar(stdio_usart_base);
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