233 lines
9.5 KiB
C
233 lines
9.5 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 SystemView * Real-time application analysis *
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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 SystemView and 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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* SystemView version: 3.30 *
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* *
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**********************************************************************
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-------------------------- END-OF-HEADER -----------------------------
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File : SEGGER_SYSVIEW_Config_NoOS.c
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Purpose : Sample setup configuration of SystemView without an OS for Cortex-M0.
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Revision: $Rev: 18540 $
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*/
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#include "SEGGER_SYSVIEW.h"
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#include "SEGGER_SYSVIEW_Conf.h"
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// SystemcoreClock can be used in most CMSIS compatible projects.
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// In non-CMSIS projects define SYSVIEW_CPU_FREQ.
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extern unsigned int SystemCoreClock;
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extern unsigned int SEGGER_SYSVIEW_TickCnt;
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/*********************************************************************
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*
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* Defines, fixed
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*
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**********************************************************************
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*/
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#define SCB_ICSR (*(volatile U32*) (0xE000ED04uL)) // Interrupt Control State Register
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#define SCB_ICSR_PENDSTSET_MASK (1UL << 26) // SysTick pending bit
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#define SYST_RVR (*(volatile U32*) (0xE000E014uL)) // SysTick Reload Value Register
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#define SYST_CVR (*(volatile U32*) (0xE000E018uL)) // SysTick Current Value Register
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/*********************************************************************
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*
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* Defines, configurable
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*
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**********************************************************************
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*/
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// The application name to be displayed in SystemViewer
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#define SYSVIEW_APP_NAME "Demo Application"
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// The target device name
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#define SYSVIEW_DEVICE_NAME "Cortex-M0"
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// Frequency of the timestamp. Must match SEGGER_SYSVIEW_Conf.h
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#define SYSVIEW_TIMESTAMP_FREQ (SystemCoreClock)
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// System Frequency. SystemcoreClock is used in most CMSIS compatible projects.
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#define SYSVIEW_CPU_FREQ (SystemCoreClock)
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// The lowest RAM address used for IDs (pointers)
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#define SYSVIEW_RAM_BASE (0x10000000)
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// Define as 1 if the Cortex-M cycle counter is used as SystemView timestamp. Must match SEGGER_SYSVIEW_Conf.h
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#ifndef USE_CYCCNT_TIMESTAMP
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#define USE_CYCCNT_TIMESTAMP 1
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#endif
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// Define as 1 if the Cortex-M cycle counter is used and there might be no debugger attached while recording.
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#ifndef ENABLE_DWT_CYCCNT
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#define ENABLE_DWT_CYCCNT (USE_CYCCNT_TIMESTAMP & SEGGER_SYSVIEW_POST_MORTEM_MODE)
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#endif
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/*********************************************************************
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*
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* Defines, fixed
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*
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**********************************************************************
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*/
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#define DEMCR (*(volatile unsigned long*) (0xE000EDFCuL)) // Debug Exception and Monitor Control Register
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#define TRACEENA_BIT (1uL << 24) // Trace enable bit
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#define DWT_CTRL (*(volatile unsigned long*) (0xE0001000uL)) // DWT Control Register
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#define NOCYCCNT_BIT (1uL << 25) // Cycle counter support bit
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#define CYCCNTENA_BIT (1uL << 0) // Cycle counter enable bit
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/*********************************************************************
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*
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* _cbSendSystemDesc()
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*
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* Function description
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* Sends SystemView description strings.
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*/
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static void _cbSendSystemDesc(void) {
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SEGGER_SYSVIEW_SendSysDesc("N="SYSVIEW_APP_NAME",D="SYSVIEW_DEVICE_NAME);
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SEGGER_SYSVIEW_SendSysDesc("I#15=SysTick");
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}
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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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void SEGGER_SYSVIEW_Conf(void) {
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#if USE_CYCCNT_TIMESTAMP
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#if ENABLE_DWT_CYCCNT
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//
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// If no debugger is connected, the DWT must be enabled by the application
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//
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if ((DEMCR & TRACEENA_BIT) == 0) {
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DEMCR |= TRACEENA_BIT;
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}
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#endif
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//
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// The cycle counter must be activated in order
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// to use time related functions.
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//
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if ((DWT_CTRL & NOCYCCNT_BIT) == 0) { // Cycle counter supported?
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if ((DWT_CTRL & CYCCNTENA_BIT) == 0) { // Cycle counter not enabled?
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DWT_CTRL |= CYCCNTENA_BIT; // Enable Cycle counter
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}
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}
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#endif
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SEGGER_SYSVIEW_Init(SYSVIEW_TIMESTAMP_FREQ, SYSVIEW_CPU_FREQ,
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0, _cbSendSystemDesc);
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SEGGER_SYSVIEW_SetRAMBase(SYSVIEW_RAM_BASE);
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}
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/*********************************************************************
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*
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* SEGGER_SYSVIEW_X_GetTimestamp()
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*
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* Function description
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* Returns the current timestamp in ticks using the system tick
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* count and the SysTick counter.
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* All parameters of the SysTick have to be known and are set via
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* configuration defines on top of the file.
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*
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* Return value
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* The current timestamp.
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*
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* Additional information
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* SEGGER_SYSVIEW_X_GetTimestamp is always called when interrupts are
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* disabled. Therefore locking here is not required.
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*/
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U32 SEGGER_SYSVIEW_X_GetTimestamp(void) {
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#if USE_CYCCNT_TIMESTAMP
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U32 TickCount;
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U32 Cycles;
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U32 CyclesPerTick;
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//
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// Get the cycles of the current system tick.
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// SysTick is down-counting, subtract the current value from the number of cycles per tick.
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//
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CyclesPerTick = SYST_RVR + 1;
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Cycles = (CyclesPerTick - SYST_CVR);
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//
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// Get the system tick count.
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//
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TickCount = SEGGER_SYSVIEW_TickCnt;
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//
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// If a SysTick interrupt is pending, re-read timer and adjust result
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//
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if ((SCB_ICSR & SCB_ICSR_PENDSTSET_MASK) != 0) {
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Cycles = (CyclesPerTick - SYST_CVR);
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TickCount++;
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}
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Cycles += TickCount * CyclesPerTick;
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return Cycles;
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#endif
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}
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/*********************************************************************
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*
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* SEGGER_SYSVIEW_X_GetInterruptId()
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*
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* Function description
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* Return the currently active interrupt Id,
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* which ist the active vector taken from IPSR[5:0].
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*
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* Return value
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* The current currently active interrupt Id.
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*
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* Additional information
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* This function is not used by default, as the active vector can be
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* read from ICSR instead on Cortex-M0.
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* For Cortex-M0+ devices, change SEGGER_SYSVIEW_GET_INTERRUPT_ID
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* in SEGGER_SYSVIEW_Conf.h to call this function instead.
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*/
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U32 SEGGER_SYSVIEW_X_GetInterruptId(void) {
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U32 Id;
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__asm volatile ("mrs %0, ipsr"
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: "=r" (Id)
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);
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Id &= 0x3F;
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return Id;
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}
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/*************************** End of file ****************************/
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