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.
168 lines
4.3 KiB
C
168 lines
4.3 KiB
C
/**
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* \file
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*
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* \brief System-specific implementation of the \ref _read 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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* \defgroup group_common_utils_stdio Standard I/O (stdio)
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*
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* Common standard I/O driver that implements the stdio
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* read and write functions on AVR and SAM devices.
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*
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* \{
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*/
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extern volatile void *volatile stdio_base;
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void (*ptr_get)(void volatile*, char*);
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// IAR common implementation
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#if ( defined(__ICCAVR32__) || defined(__ICCAVR__) || defined(__ICCARM__) )
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#include <yfuns.h>
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_STD_BEGIN
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#pragma module_name = "?__read"
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/*! \brief Reads a number of bytes, at most \a size, into the memory area
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* pointed to by \a buffer.
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*
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* \param handle File handle to read from.
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* \param buffer Pointer to buffer to write read bytes to.
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* \param size Number of bytes to read.
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*
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* \return The number of bytes read, \c 0 at the end of the file, or
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* \c _LLIO_ERROR on failure.
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*/
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size_t __read(int handle, unsigned char *buffer, size_t size)
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{
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int nChars = 0;
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// This implementation only reads from stdin.
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// For all other file handles, it returns failure.
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if (handle != _LLIO_STDIN) {
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return _LLIO_ERROR;
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}
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for (; size > 0; --size) {
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ptr_get(stdio_base, (char*)buffer);
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buffer++;
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nChars++;
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}
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return nChars;
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}
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/*! \brief This routine is required by IAR DLIB library since EWAVR V6.10
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* the implementation is empty to be compatible with old IAR version.
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*/
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int __close(int handle)
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{
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UNUSED(handle);
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return 0;
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}
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/*! \brief This routine is required by IAR DLIB library since EWAVR V6.10
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* the implementation is empty to be compatible with old IAR version.
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*/
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int remove(const char* val)
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{
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UNUSED(val);
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return 0;
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}
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/*! \brief This routine is required by IAR DLIB library since EWAVR V6.10
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* the implementation is empty to be compatible with old IAR version.
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*/
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long __lseek(int handle, long val, int val2)
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{
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UNUSED(handle);
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UNUSED(val2);
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return val;
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}
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_STD_END
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// GCC AVR32 and SAM implementation
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#elif (defined(__GNUC__) && !XMEGA && !MEGA)
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int __attribute__((weak))
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_read (int file, char * ptr, int len); // Remove GCC compiler warning
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int __attribute__((weak))
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_read (int file, char * ptr, int len)
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{
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int nChars = 0;
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if (file != 0) {
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return -1;
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}
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for (; len > 0; --len) {
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ptr_get(stdio_base, ptr);
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ptr++;
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nChars++;
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}
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return nChars;
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}
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// GCC AVR implementation
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#elif (defined(__GNUC__) && (XMEGA || MEGA) )
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int _read (int *f); // Remove GCC compiler warning
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int _read (int *f)
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{
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char c;
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ptr_get(stdio_base,&c);
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return c;
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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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