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https://github.com/marqs85/ossc
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81 lines
3.4 KiB
C
81 lines
3.4 KiB
C
/******************************************************************************
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* *
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* License Agreement *
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* *
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* Copyright (c) 2015 Altera Corporation, San Jose, California, USA. *
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* All rights reserved. *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* copy of this software and associated documentation files (the "Software"), *
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* to deal in the Software without restriction, including without limitation *
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* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
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* and/or sell copies of the Software, and to permit persons to whom the *
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* Software is furnished to do so, subject to the following conditions: *
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* *
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* The above copyright notice and this permission notice shall be included in *
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* all copies or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE *
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING *
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *
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* DEALINGS IN THE SOFTWARE. *
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* *
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* This agreement shall be governed in all respects by the laws of the State *
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* of California and by the laws of the United States of America. *
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* *
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* Altera does not recommend, suggest or require that this reference design *
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* file be used in conjunction or combination with any other product. *
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******************************************************************************/
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#ifdef ALT_SEMIHOSTING
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#include "sys/alt_stdio.h"
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#include "unistd.h"
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#ifndef ALT_PUTBUF_SIZE
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#define ALT_PUTBUF_SIZE 64
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#endif
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// Buffer for the printed chars
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static char buf[ALT_PUTBUF_SIZE] ={0};
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// index into the buffer
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static unsigned int fill_index;
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/*
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* ALT putcharbuf funtion
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* Used only for semihosting.
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* Not thread safe!
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* This fucntion buffers up chars to be printed until either alt_putbufflush()
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* is called or the buffer is full.
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* It is called by alt_printf when semihosting is turned on
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* Its purpose is to minimize the number of Break 1 issuesd by the semihosting
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* libraries.
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*/
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int
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alt_putcharbuf(int c)
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{
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buf[fill_index++] = (char)(c & 0xff);
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if(fill_index >= ALT_PUTBUF_SIZE)
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alt_putbufflush();
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return c;
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}
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/*
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* ALT putbufflush
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* used only for smehosting
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* Not thread safe!
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* Dumps all the chars in the buffer to STDOUT
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*/
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int
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alt_putbufflush()
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{
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int results;
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results = write(STDOUT_FILENO,buf,fill_index);
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fill_index = 0;
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return results;
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}
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#endif
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