| 1 | /*********************************************************************
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| 2 | * SEGGER Microcontroller GmbH *
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| 3 | * The Embedded Experts *
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| 4 | **********************************************************************
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| 5 | * *
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| 6 | * (c) 2014 - 2019 SEGGER Microcontroller GmbH *
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| 7 | * *
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| 8 | * www.segger.com Support: support@segger.com *
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| 9 | * *
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| 10 | **********************************************************************
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| 11 | * *
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| 12 | * All rights reserved. *
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| 13 | * *
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| 14 | * Redistribution and use in source and binary forms, with or *
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| 15 | * without modification, are permitted provided that the following *
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| 16 | * conditions are met: *
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| 17 | * *
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| 18 | * - Redistributions of source code must retain the above copyright *
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| 19 | * notice, this list of conditions and the following disclaimer. *
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| 20 | * *
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| 21 | * - Neither the name of SEGGER Microcontroller GmbH *
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| 22 | * nor the names of its contributors may be used to endorse or *
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| 23 | * promote products derived from this software without specific *
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| 24 | * prior written permission. *
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| 25 | * *
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| 26 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND *
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| 27 | * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, *
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| 28 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF *
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| 29 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE *
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| 30 | * DISCLAIMED. *
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| 31 | * IN NO EVENT SHALL SEGGER Microcontroller GmbH BE LIABLE FOR *
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| 32 | * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR *
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| 33 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT *
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| 34 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; *
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| 35 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF *
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| 36 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT *
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| 37 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE *
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| 38 | * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH *
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| 39 | * DAMAGE. *
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| 40 | * *
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| 41 | **********************************************************************
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| 42 | * *
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| 43 | * RTT version: 5.12e *
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| 44 | * *
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| 45 | **********************************************************************
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| 46 | -------- END-OF-HEADER ---------------------------------------------
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| 47 | File : SEGGER_RTT_Syscalls_GCC.c
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| 48 | Purpose : Low-level functions for using printf() via RTT in GCC.
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| 49 | To use RTT for printf output, include this file in your
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| 50 | application.
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| 51 | ----------------------------------------------------------------------
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| 52 | */
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| 53 | //#include <reent.h> // required for _write_r
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| 54 | #include "SEGGER_RTT.h"
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| 55 |
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| 56 |
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| 57 | /*********************************************************************
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| 58 | *
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| 59 | * Types
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| 60 | *
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| 61 | **********************************************************************
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| 62 | */
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| 63 | //
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| 64 | // If necessary define the _reent struct
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| 65 | // to match the one passed by the used standard library.
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| 66 | //
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| 67 | struct _reent;
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| 68 |
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| 69 | /*********************************************************************
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| 70 | *
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| 71 | * Function prototypes
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| 72 | *
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| 73 | **********************************************************************
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| 74 | */
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| 75 | int _write(int file, char *ptr, int len);
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| 76 | int _write_r(struct _reent *r, int file, const void *ptr, int len);
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| 77 |
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| 78 | /*********************************************************************
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| 79 | *
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| 80 | * Global functions
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| 81 | *
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| 82 | **********************************************************************
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| 83 | */
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| 84 |
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| 85 | /*********************************************************************
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| 86 | *
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| 87 | * _write()
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| 88 | *
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| 89 | * Function description
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| 90 | * Low-level write function.
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| 91 | * libc subroutines will use this system routine for output to all files,
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| 92 | * including stdout.
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| 93 | * Write data via RTT.
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| 94 | */
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| 95 | int _write(int file, char *ptr, int len) {
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| 96 | (void) file; /* Not used, avoid warning */
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| 97 | SEGGER_RTT_Write(0, ptr, len);
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| 98 | return len;
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| 99 | }
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| 100 |
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| 101 | /*********************************************************************
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| 102 | *
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| 103 | * _write_r()
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| 104 | *
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| 105 | * Function description
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| 106 | * Low-level reentrant write function.
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| 107 | * libc subroutines will use this system routine for output to all files,
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| 108 | * including stdout.
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| 109 | * Write data via RTT.
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| 110 | */
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| 111 | int _write_r(struct _reent *r, int file, const void *ptr, int len) {
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| 112 | (void) file; /* Not used, avoid warning */
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| 113 | (void) r; /* Not used, avoid warning */
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| 114 | SEGGER_RTT_Write(0, ptr, len);
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| 115 | return len;
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| 116 | }
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| 117 |
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| 118 | /****** End Of File *************************************************/
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