201 lines
7.2 KiB
C
201 lines
7.2 KiB
C
/*********************************************************************
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* SEGGER Microcontroller GmbH *
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* The Embedded Experts *
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**********************************************************************
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* *
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* (c) 1995 - 2021 SEGGER Microcontroller GmbH *
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* *
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* www.segger.com Support: support@segger.com *
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* *
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**********************************************************************
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* *
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* SEGGER RTT * Real Time Transfer for embedded targets *
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* *
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**********************************************************************
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* *
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* All rights reserved. *
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* *
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* SEGGER strongly recommends to not make any changes *
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* to or modify the source code of this software in order to stay *
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* compatible with the RTT protocol and J-Link. *
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* *
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* Redistribution and use in source and binary forms, with or *
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* without modification, are permitted provided that the following *
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* condition is met: *
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* *
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* o Redistributions of source code must retain the above copyright *
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* notice, this condition and the following disclaimer. *
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* *
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND *
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, *
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF *
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE *
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* DISCLAIMED. IN NO EVENT SHALL SEGGER Microcontroller BE LIABLE FOR *
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR *
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT *
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; *
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF *
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT *
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE *
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH *
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* DAMAGE. *
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* *
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**********************************************************************
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* *
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* RTT version: 7.22 *
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* *
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**********************************************************************
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---------------------------END-OF-HEADER------------------------------
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File : SEGGER_RTT_Syscalls_GCC.c
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Purpose : Low-level functions for using printf() via RTT in GCC.
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To use RTT for printf output, include this file in your
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application.
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Revision: $Rev: 20755 $
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----------------------------------------------------------------------
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*/
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/*
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* This is to be compatible with other MSDK debug_console.
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*
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* When SDK_DEBUGCONSOLE_UART is defined, the toolchain IO functions like
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* printf, scanf are redirected to RTT.
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*/
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#if defined(SDK_DEBUGCONSOLE_UART)
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#if (defined __GNUC__) && !(defined __SES_ARM) && !(defined __CROSSWORKS_ARM) && !(defined __ARMCC_VERSION) && \
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!(defined __CC_ARM)
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#include <reent.h> // required for _write_r
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#include "SEGGER_RTT.h"
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/*********************************************************************
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*
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* Types
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*
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**********************************************************************
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*/
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//
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// If necessary define the _reent struct
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// to match the one passed by the used standard library.
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//
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struct _reent;
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/*********************************************************************
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*
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* Function prototypes
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*
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**********************************************************************
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*/
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_ssize_t _write(int file, const void *ptr, size_t len);
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_ssize_t _write_r(struct _reent *r, int file, const void *ptr, size_t len);
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/*********************************************************************
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*
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* Global functions
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*
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**********************************************************************
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*/
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/*********************************************************************
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*
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* _write()
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*
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* Function description
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* Low-level write function.
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* libc subroutines will use this system routine for output to all files,
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* including stdout.
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* Write data via RTT.
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*/
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_ssize_t _write(int file, const void *ptr, size_t len)
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{
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(void)file; /* Not used, avoid warning */
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SEGGER_RTT_Write(0, ptr, len);
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return len;
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}
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/*********************************************************************
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*
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* _write_r()
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*
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* Function description
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* Low-level reentrant write function.
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* libc subroutines will use this system routine for output to all files,
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* including stdout.
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* Write data via RTT.
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*/
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_ssize_t _write_r(struct _reent *r, int file, const void *ptr, size_t len)
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{
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(void)file; /* Not used, avoid warning */
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(void)r; /* Not used, avoid warning */
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SEGGER_RTT_Write(0, ptr, len);
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return len;
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}
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/*********************************************************************
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*
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* _read()
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*
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* Function description
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* Low-level read function.
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* Standard library subroutines will use this system routine
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* for reading data via RTT.
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*/
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_ssize_t _read(int handle, char *buffer, int size)
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{
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(void)handle; /* Not used, avoid warning */
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for (int i = 0; i < bufSize; i++)
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{
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*buf = SEGGER_RTT_WaitKey();
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buf++;
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}
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return bufSize;
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}
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/*********************************************************************
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*
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* __sys_write()
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*
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* Function description
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* Low-level write function used by REDLIB.
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*/
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int __sys_write(int handle, char *buffer, int size)
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{
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if (NULL == buffer)
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{
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/* return -1 if error. */
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return -1;
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}
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/* This function only writes to "standard out" and "standard err" for all other file handles it returns failure. */
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if ((handle != 1) && (handle != 2))
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{
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return -1;
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}
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/* Send data. */
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SEGGER_RTT_Write(0, (const char *)buffer, size);
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return 0;
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}
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/*********************************************************************
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*
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* _read()
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*
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* Function description
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* Low-level read function, used by REDLIB.
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* Standard library subroutines will use this system routine
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* for reading data via RTT.
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*/
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int __sys_readc(void)
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{
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return SEGGER_RTT_WaitKey();
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}
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#endif
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#endif /* SDK_DEBUGCONSOLE_UART */
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/****** End Of File *************************************************/
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