RTT SEGGER打印C文件源码

/********************************************************************* * SEGGER Microcontroller GmbH & Co. KG * * The Embedded Experts * ********************************************************************** * * * (c) 2014 - 2016 SEGGER Microcontroller GmbH & Co. KG * * * * www.segger.com Support: support@segger.com * * * ********************************************************************** * * * SEGGER RTT * Real Time Transfer for embedded targets * * * ********************************************************************** * * * All rights reserved. * * * * SEGGER strongly recommends to not make any changes * * to or modify the source code of this software in order to stay * * compatible with the RTT protocol and J-Link. * * * * Redistribution and use in source and binary forms, with or * * without modification, are permitted provided that the following * * conditions are met: * * * * o Redistributions of source code must retain the above copyright * * notice, this list of conditions and the following disclaimer. * * * * o Redistributions in binary form must reproduce the above * * copyright notice, this list of conditions and the following * * disclaimer in the documentation and/or other materials provided * * with the distribution. * * * * o Neither the name of SEGGER Microcontroller GmbH & Co. KG * * nor the names of its contributors may be used to endorse or * * promote products derived from this software without specific * * prior written permission. * * * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND * * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, * * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * * DISCLAIMED. IN NO EVENT SHALL SEGGER Microcontroller BE LIABLE FOR * * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT * * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE * * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH * * DAMAGE. * * * ********************************************************************** * * * RTT version: 6.10i * * * ********************************************************************** ---------------------------END-OF-HEADER------------------------------ File : SEGGER_RTT.c Purpose : Implementation of SEGGER real-time transfer (RTT) which allows real-time communication on targets which support debugger memory accesses while the CPU is running. Revision: $Rev: 4351 $ Additional information: Type "int" is assumed to be 32-bits in size H->T Host to target communication T->H Target to host communication RTT channel 0 is always present and reserved for Terminal usage. Name is fixed to "Terminal" Effective buffer size: SizeOfBuffer - 1 WrOff == RdOff: Buffer is empty WrOff == (RdOff - 1): Buffer is full WrOff > RdOff: Free space includes wrap-around WrOff < RdOff: Used space includes wrap-around (WrOff == (SizeOfBuffer - 1)) && (RdOff == 0): Buffer full and wrap-around after next byte ---------------------------------------------------------------------- */ #include "SEGGER_RTT.h" #include <string.h> // for memcpy /********************************************************************* * * Configuration, default values * ********************************************************************** */ #ifndef BUFFER_SIZE_UP #define BUFFER_SIZE_UP 1024 // Size of the buffer for terminal output of target, up to host #endif #ifndef BUFFER_SIZE_DOWN #define BUFFER_SIZE_DOWN 16 // Size of the buffer for terminal input to target from host (Usually keyboard input) #endif #ifndef SEGGER_RTT_MAX_NUM_UP_BUFFERS #define SEGGER_RTT_MAX_NUM_UP_BUFFERS 2 // Number of up-buffers (T->H) available on this target #endif #ifndef SEGGER_RTT_MAX_NUM_DOWN_BUFFERS #define SEGGER_RTT_MAX_NUM_DOWN_BUFFERS 2 // Number of down-buffers (H->T) available on this target #endif #ifndef SEGGER_RTT_BUFFER_SECTION #if defined(SEGGER_RTT_SECTION) #define SEGGER_RTT_BUFFER_SECTION SEGGER_RTT_SECTION #endif #endif #ifndef SEGGER_RTT_ALIGNMENT #define SEGGER_RTT_ALIGNMENT 0 #endif #ifndef SEGGER_RTT_BUFFER_ALIGNMENT #define SEGGER_RTT_BUFFER_ALIGNMENT 0 #endif #ifndef SEGGER_RTT_MODE_DEFAULT #define SEGGER_RTT_MODE_DEFAULT SEGGER_RTT_MODE_NO_BLOCK_SKIP #endif #ifndef SEGGER_RTT_LOCK #define SEGGER_RTT_LOCK() #endif #ifndef SEGGER_RTT_UNLOCK #define SEGGER_RTT_UNLOCK() #endif #ifndef STRLEN #define STRLEN(a) strlen((a)) #endif #ifndef MEMCPY #define MEMCPY(pDest, pSrc, NumBytes) memcpy((pDest), (pSrc), (NumBytes)) #endif #ifndef MIN #define MIN(a, b) (((a) < (b)) ? (a) : (b)) #endif #ifndef MAX #define MAX(a, b) (((a) > (b)) ? (a) : (b)) #endif // // For some environments, NULL may not be defined until certain headers are included // #ifndef NULL #define NULL 0 #endif /********************************************************************* * * Defines, fixed * ********************************************************************** */ #if (defined __ICCARM__) || (defined __ICCRX__) #define RTT_PRAGMA(P) _Pragma(#P) #endif #if SEGGER_RTT_ALIGNMENT || SEGGER_RTT_BUFFER_ALIGNMENT #if (defined __GNUC__) #define SEGGER_RTT_ALIGN(Var, Alignment) Var __attribute__ ((aligned (Alignment))) #elif (defined __ICCARM__) || (defined __ICCRX__) #define PRAGMA(A) _Pragma(#A) #define SEGGER_RTT_ALIGN(Var, Alignment) RTT_PRAGMA(data_alignment=Alignment) \ Var #elif (defined __CC_ARM__) #define SEGGER_RTT_ALIGN(Var, Alignment) Var __attribute__ ((aligned (Alignment))) #else #error "Alignment not supported for this compiler." #en