8f26d181c3
Everything works fine without USB being plugged in but faults (I think) when USB is plugged in. This is switched away from the USB code from the bootloader onto the USB code thats generated by Atmel Studio using the high level classes from ASF.
137 lines
3.5 KiB
C
137 lines
3.5 KiB
C
/**
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* \file
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*
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* \brief System-specific implementation of the \ref _write function used by
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* the standard library.
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*
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* Copyright (c) 2009-2015 Atmel Corporation. All rights reserved.
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*
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* \asf_license_start
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*
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* \page License
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. The name of Atmel may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* 4. This software may only be redistributed and used in connection with an
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* Atmel microcontroller product.
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*
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* THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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* EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* \asf_license_stop
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*
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*/
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/*
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* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
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*/
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#include "compiler.h"
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/**
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* \addtogroup group_common_utils_stdio
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*
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* \{
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*/
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volatile void *volatile stdio_base;
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int (*ptr_put)(void volatile*, char);
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#if ( defined(__ICCARM__))
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#include <yfuns.h>
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_STD_BEGIN
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#pragma module_name = "?__write"
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/*! \brief Writes a number of bytes, at most \a size, from the memory area
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* pointed to by \a buffer.
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*
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* If \a buffer is zero then \ref __write performs flushing of internal buffers,
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* if any. In this case, \a handle can be \c -1 to indicate that all handles
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* should be flushed.
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*
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* \param handle File handle to write to.
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* \param buffer Pointer to buffer to read bytes to write from.
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* \param size Number of bytes to write.
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*
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* \return The number of bytes written, or \c _LLIO_ERROR on failure.
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*/
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size_t __write(int handle, const unsigned char *buffer, size_t size)
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{
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size_t nChars = 0;
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if (buffer == 0) {
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// This means that we should flush internal buffers.
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return 0;
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}
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// This implementation only writes to stdout and stderr.
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// For all other file handles, it returns failure.
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if (handle != _LLIO_STDOUT && handle != _LLIO_STDERR) {
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return _LLIO_ERROR;
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}
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for (; size != 0; --size) {
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if (ptr_put(stdio_base, *buffer++) < 0) {
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return _LLIO_ERROR;
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}
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++nChars;
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}
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return nChars;
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}
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_STD_END
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#elif (defined(__GNUC__))
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int __attribute__((weak))
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_write (int file, char * ptr, int len);
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int __attribute__((weak))
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_write (int file, char * ptr, int len)
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{
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int nChars = 0;
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if ((file != 1) && (file != 2) && (file!=3)) {
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return -1;
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}
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for (; len != 0; --len) {
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if (ptr_put(stdio_base, *ptr++) < 0) {
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return -1;
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}
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++nChars;
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}
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return nChars;
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}
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#endif
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/**
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* \}
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*/
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