112 lines
3.9 KiB
C
112 lines
3.9 KiB
C
/**************************************************************************//**
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* @file
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* @brief SWO Trace API (for eAProfiler)
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* @author Energy Micro AS
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* @version 2.0.1
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******************************************************************************
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* @section License
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* <b>(C) Copyright 2012 Energy Micro AS, http://www.energymicro.com</b>
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*******************************************************************************
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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* 4. The source and compiled code may only be used on Energy Micro "EFM32"
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* microcontrollers and "EFR4" radios.
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*
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* DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Energy Micro AS has no
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* obligation to support this Software. Energy Micro AS is providing the
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* Software "AS IS", with no express or implied warranties of any kind,
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* including, but not limited to, any implied warranties of merchantability
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* or fitness for any particular purpose or warranties against infringement
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* of any proprietary rights of a third party.
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*
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* Energy Micro AS will not be liable for any consequential, incidental, or
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* special damages, or any other relief, or for any claim by any third party,
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* arising from your use of this Software.
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*
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*****************************************************************************/
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#include <stdbool.h>
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#include "efm32.h"
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#include "trace.h"
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/***************************************************************************//**
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* @addtogroup BSP
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* @{
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******************************************************************************/
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/**************************************************************************//**
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* @brief Configure trace output for energyAware Profiler
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*****************************************************************************/
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void TRACE_SWOSetup(void)
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{
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uint32_t *dwt_ctrl = (uint32_t *) 0xE0001000;
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uint32_t *tpiu_prescaler = (uint32_t *) 0xE0040010;
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uint32_t *tpiu_protocol = (uint32_t *) 0xE00400F0;
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/* Enable GPIO clock */
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CMU->HFPERCLKEN0 |= CMU_HFPERCLKEN0_GPIO;
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/* Enable Serial wire output pin */
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GPIO->ROUTE |= GPIO_ROUTE_SWOPEN;
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/* Set location 1 */
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GPIO->ROUTE = (GPIO->ROUTE & ~(_GPIO_ROUTE_SWLOCATION_MASK)) | GPIO_ROUTE_SWLOCATION_LOC1;
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/* Enable output on pin */
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GPIO->P[2].MODEH &= ~(_GPIO_P_MODEH_MODE15_MASK);
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GPIO->P[2].MODEH |= GPIO_P_MODEH_MODE15_PUSHPULL;
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/* Enable debug clock AUXHFRCO */
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CMU->OSCENCMD = CMU_OSCENCMD_AUXHFRCOEN;
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/* Wait until clock is ready */
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while(!(CMU->STATUS & CMU_STATUS_AUXHFRCORDY));
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/* Enable trace in core debug */
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CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk;
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/* Enable PC and IRQ sampling output */
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*dwt_ctrl = 0x400113FF;
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/* Set TPIU prescaler to 16. */
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*tpiu_prescaler = 0xf;
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/* Set protocol to NRZ */
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*tpiu_protocol = 2;
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/* Unlock ITM and output data */
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ITM->LAR = 0xC5ACCE55;
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ITM->TCR = 0x10009;
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}
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/**************************************************************************//**
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* @brief Profiler configuration
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* @return true if energyAware Profiler/SWO is enabled, false if not
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* @note If first word of the user page is zero, this will not
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* enable SWO profiler output, see trace.h
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*****************************************************************************/
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bool TRACE_ProfilerSetup(void)
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{
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volatile uint32_t *userData = (uint32_t *) USER_PAGE;
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/* Check magic "trace" word in user page */
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if(*userData == 0x00000000UL)
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{
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return false;
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}
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else
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{
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TRACE_SWOSetup();
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return true;
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}
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}
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/** @} (end group BSP) */
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