text: /*********************************************************************
  *                    SEGGER Microcontroller GmbH                     *
  *                        The Embedded Experts                        *
  **********************************************************************
  *                                                                    *
  *            (c) 1995 - 2019 SEGGER Microcontroller GmbH             *
  *                                                                    *
  *       www.segger.com     Support: support@segger.com               *
  *                                                                    *
  **********************************************************************
  *                                                                    *
  *       SEGGER SystemView * Real-time application analysis           *
  *                                                                    *
  **********************************************************************
  *                                                                    *
  * 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 SystemView and RTT protocol, and J-Link.       *
  *                                                                    *
  * Redistribution and use in source and binary forms, with or         *
  * without modification, are permitted provided that the following    *
  * condition is met:                                                  *
  *                                                                    *
  * o Redistributions of source code must retain the above copyright   *
  *   notice, this condition and the following disclaimer.             *
  *                                                                    *
  * 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.                                                            *
  *                                                                    *
  **********************************************************************
  *                                                                    *
  *       SystemView version: 3.20                                    *
  *                                                                    *
  **********************************************************************
  -------------------------- END-OF-HEADER -----------------------------
  
  File    : SEGGER_SYSVIEW_Config_NoOS.c
  Purpose : Sample setup configuration of SystemView without an OS.
  Revision: $Rev: 9599 $
  */
  #include "SEGGER_SYSVIEW.h"
  #include "SEGGER_SYSVIEW_Conf.h"
  
  // SystemcoreClock can be used in most CMSIS compatible projects.
  // In non-CMSIS projects define SYSVIEW_CPU_FREQ.
  extern unsigned int SystemCoreClock;
  
  /*********************************************************************
  *
  *       Defines, configurable
  *
  **********************************************************************
  */
  // The application name to be displayed in SystemViewer
  #define SYSVIEW_APP_NAME        "Demo Application"
  
  // The target device name
  #define SYSVIEW_DEVICE_NAME     "Cortex-M4"
  
  // Frequency of the timestamp. Must match SEGGER_SYSVIEW_Conf.h
  #define SYSVIEW_TIMESTAMP_FREQ  (SystemCoreClock)
  
  // System Frequency. SystemcoreClock is used in most CMSIS compatible projects.
  #define SYSVIEW_CPU_FREQ        (SystemCoreClock)
  
  // The lowest RAM address used for IDs (pointers)
  #define SYSVIEW_RAM_BASE        (0x10000000)
  
  // Define as 1 if the Cortex-M cycle counter is used as SystemView timestamp. Must match SEGGER_SYSVIEW_Conf.h
  #ifndef   USE_CYCCNT_TIMESTAMP
    #define USE_CYCCNT_TIMESTAMP    1
  #endif
  
  // Define as 1 if the Cortex-M cycle counter is used and there might be no debugger attached while recording.
  #ifndef   ENABLE_DWT_CYCCNT
    #define ENABLE_DWT_CYCCNT       (USE_CYCCNT_TIMESTAMP & SEGGER_SYSVIEW_POST_MORTEM_MODE)
  #endif
  
  /*********************************************************************
  *
  *       Defines, fixed
  *
  **********************************************************************
  */
  #define DEMCR                     (*(volatile unsigned long*) (0xE000EDFCuL))   // Debug Exception and Monitor Control Register
  #define TRACEENA_BIT              (1uL << 24)                                   // Trace enable bit
  #define DWT_CTRL                  (*(volatile unsigned long*) (0xE0001000uL))   // DWT Control Register
  #define NOCYCCNT_BIT              (1uL << 25)                                   // Cycle counter support bit
  #define CYCCNTENA_BIT             (1uL << 0)                                    // Cycle counter enable bit
  
  /********************************************************************* 
  *
  *       _cbSendSystemDesc()
  *
  *  Function description
  *    Sends SystemView description strings.
  */
  static void _cbSendSystemDesc(void) {
    SEGGER_SYSVIEW_SendSysDesc("N="SYSVIEW_APP_NAME",D="SYSVIEW_DEVICE_NAME);
    SEGGER_SYSVIEW_SendSysDesc("I#15=SysTick");
  }
  
  /*********************************************************************
  *
  *       Global functions
  *
  **********************************************************************
  */
  void SEGGER_SYSVIEW_Conf(void) {
  #if USE_CYCCNT_TIMESTAMP
  #if ENABLE_DWT_CYCCNT
    //
    // If no debugger is connected, the DWT must be enabled by the application
    //
    if ((DEMCR & TRACEENA_BIT) == 0) {
      DEMCR |= TRACEENA_BIT;
    }
  #endif
    //
    //  The cycle counter must be activated in order
    //  to use time related functions.
    //
    if ((DWT_CTRL & NOCYCCNT_BIT) == 0) {       // Cycle counter supported?
      if ((DWT_CTRL & CYCCNTENA_BIT) == 0) {    // Cycle counter not enabled?
        DWT_CTRL |= CYCCNTENA_BIT;              // Enable Cycle counter
      }
    }
  #endif
    SEGGER_SYSVIEW_Init(SYSVIEW_TIMESTAMP_FREQ, SYSVIEW_CPU_FREQ, 
                        0, _cbSendSystemDesc);
    SEGGER_SYSVIEW_SetRAMBase(SYSVIEW_RAM_BASE);
  }
  
  /*************************** End of file ****************************/
  