1 /********************************************************************* 2 * SEGGER Microcontroller GmbH * 3 * The Embedded Experts * 4 ********************************************************************** 5 * * 6 * (c) 1995 - 2019 SEGGER Microcontroller GmbH * 7 * * 8 * www.segger.com Support: [email protected] * 9 * * 10 ********************************************************************** 11 * * 12 * SEGGER RTT * Real Time Transfer for embedded targets * 13 * * 14 ********************************************************************** 15 * * 16 * All rights reserved. * 17 * * 18 * SEGGER strongly recommends to not make any changes * 19 * to or modify the source code of this software in order to stay * 20 * compatible with the RTT protocol and J-Link. * 21 * * 22 * Redistribution and use in source and binary forms, with or * 23 * without modification, are permitted provided that the following * 24 * condition is met: * 25 * * 26 * o Redistributions of source code must retain the above copyright * 27 * notice, this condition and the following disclaimer. * 28 * * 29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND * 30 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, * 31 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * 32 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * 33 * DISCLAIMED. IN NO EVENT SHALL SEGGER Microcontroller BE LIABLE FOR * 34 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * 35 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT * 36 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * 37 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * 38 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * 39 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE * 40 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH * 41 * DAMAGE. * 42 * * 43 ********************************************************************** 44 ---------------------------END-OF-HEADER------------------------------ 45 File : SEGGER_RTT_Syscalls_GCC.c 46 Purpose : Low-level functions for using printf() via RTT in GCC. 47 To use RTT for printf output, include this file in your 48 application. 49 Revision: $Rev: 24316 $ 50 ---------------------------------------------------------------------- 51 */ 52 #if (defined __GNUC__) && !(defined __SES_ARM) && !(defined __CROSSWORKS_ARM) && !(defined __ARMCC_VERSION) && !(defined __CC_ARM) 53 54 #include "btstack_config.h" 55 #ifdef ENABLE_SEGGER_RTT 56 57 #include <reent.h> // required for _write_r 58 #include "SEGGER_RTT.h" 59 60 61 /********************************************************************* 62 * 63 * Types 64 * 65 ********************************************************************** 66 */ 67 // 68 // If necessary define the _reent struct 69 // to match the one passed by the used standard library. 70 // 71 struct _reent; 72 73 /********************************************************************* 74 * 75 * Function prototypes 76 * 77 ********************************************************************** 78 */ 79 _ssize_t _write (int file, const void *ptr, size_t len); 80 _ssize_t _write_r(struct _reent *r, int file, const void *ptr, size_t len); 81 82 /********************************************************************* 83 * 84 * Global functions 85 * 86 ********************************************************************** 87 */ 88 89 /********************************************************************* 90 * 91 * _write() 92 * 93 * Function description 94 * Low-level write function. 95 * libc subroutines will use this system routine for output to all files, 96 * including stdout. 97 * Write data via RTT. 98 */ 99 _ssize_t _write(int file, const void *ptr, size_t len) { 100 (void) file; /* Not used, avoid warning */ 101 SEGGER_RTT_Write(0, ptr, len); 102 return len; 103 } 104 105 /********************************************************************* 106 * 107 * _write_r() 108 * 109 * Function description 110 * Low-level reentrant write function. 111 * libc subroutines will use this system routine for output to all files, 112 * including stdout. 113 * Write data via RTT. 114 */ 115 _ssize_t _write_r(struct _reent *r, int file, const void *ptr, size_t len) { 116 (void) file; /* Not used, avoid warning */ 117 (void) r; /* Not used, avoid warning */ 118 SEGGER_RTT_Write(0, ptr, len); 119 return len; 120 } 121 122 #endif 123 #endif 124 /****** End Of File *************************************************/ 125