| /*This file is prepared for Doxygen automatic documentation generation.*/ |
| /*! \file ********************************************************************* |
| * |
| * \brief System-specific implementation of the \ref __write function used by |
| the standard library. |
| * |
| * - Compiler: IAR EWAVR32 |
| * - Supported devices: All AVR32 devices with a USART module can be used. |
| * - AppNote: |
| * |
| * \author Atmel Corporation (Now Microchip): |
| * https://www.microchip.com \n |
| * Support and FAQ: https://www.microchip.com/support |
| * |
| ******************************************************************************/ |
| |
| /* Copyright (c) 2007, Atmel Corporation All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * |
| * 3. The name of ATMEL may not be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY ATMEL ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY AND |
| * SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, |
| * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| |
| #include <yfuns.h> |
| #include <avr32/io.h> |
| #include "usart.h" |
| |
| |
| _STD_BEGIN |
| |
| |
| #pragma module_name = "?__write" |
| |
| |
| //! Pointer to the base of the USART module instance to use for stdio. |
| __no_init volatile avr32_usart_t *volatile stdio_usart_base; |
| |
| |
| /*! \brief Writes a number of bytes, at most \a size, from the memory area |
| * pointed to by \a buffer. |
| * |
| * If \a buffer is zero then \ref __write performs flushing of internal buffers, |
| * if any. In this case, \a handle can be \c -1 to indicate that all handles |
| * should be flushed. |
| * |
| * \param handle File handle to write to. |
| * \param buffer Pointer to buffer to read bytes to write from. |
| * \param size Number of bytes to write. |
| * |
| * \return The number of bytes written, or \c _LLIO_ERROR on failure. |
| */ |
| size_t __write(int handle, const uint8_t *buffer, size_t size) |
| { |
| size_t nChars = 0; |
| |
| if (buffer == 0) |
| { |
| // This means that we should flush internal buffers. |
| return 0; |
| } |
| |
| // This implementation only writes to stdout and stderr. |
| // For all other file handles, it returns failure. |
| if (handle != _LLIO_STDOUT && handle != _LLIO_STDERR) |
| { |
| return _LLIO_ERROR; |
| } |
| |
| for (; size != 0; --size) |
| { |
| if (usart_putchar(stdio_usart_base, *buffer++) < 0) |
| { |
| return _LLIO_ERROR; |
| } |
| |
| ++nChars; |
| } |
| |
| return nChars; |
| } |
| |
| |
| _STD_END |