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/**************************************************************************//**
* @file
* @brief API for enabling SWO or ETM trace on DK3750 board
* @author Energy Micro AS
* @version 2.0.1
******************************************************************************
* @section License
* <b>(C) Copyright 2012 Energy Micro AS, http://www.energymicro.com</b>
*******************************************************************************
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
* 4. The source and compiled code may only be used on Energy Micro "EFM32"
* microcontrollers and "EFR4" radios.
*
* DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Energy Micro AS has no
* obligation to support this Software. Energy Micro AS is providing the
* Software "AS IS", with no express or implied warranties of any kind,
* including, but not limited to, any implied warranties of merchantability
* or fitness for any particular purpose or warranties against infringement
* of any proprietary rights of a third party.
*
* Energy Micro AS will not be liable for any consequential, incidental, or
* special damages, or any other relief, or for any claim by any third party,
* arising from your use of this Software.
*
*****************************************************************************/
/***************************************************************************//**
* @addtogroup BSP
* @{
******************************************************************************/
#include <stdbool.h>
#include "efm32.h"
#include "em_gpio.h"
#include "em_cmu.h"
#include "trace.h"
/**************************************************************************//**
* @brief Configure EFM32GG990F1024 for DK3750 ETM trace output
* @note You need to configure ETM trace on on kit config menu as well!
*****************************************************************************/
void TRACE_ETMSetup(void)
{
/* Enable peripheral clocks */
CMU->HFCORECLKEN0 |= CMU_HFCORECLKEN0_LE;
CMU->HFPERCLKEN0 |= CMU_HFPERCLKEN0_GPIO;
CMU->OSCENCMD = CMU_OSCENCMD_AUXHFRCOEN;
/* Wait until AUXHFRCO clock is ready */
while (!(CMU->STATUS & CMU_STATUS_AUXHFRCORDY)) ;
/* Enable Port D, pins 3,4,5,6 for ETM Trace Data output */
GPIO->P[3].MODEL = (GPIO->P[3].MODEL & ~_GPIO_P_MODEL_MODE3_MASK) | GPIO_P_MODEL_MODE3_PUSHPULL;
GPIO->P[3].MODEL = (GPIO->P[3].MODEL & ~_GPIO_P_MODEL_MODE4_MASK) | GPIO_P_MODEL_MODE4_PUSHPULL;
GPIO->P[3].MODEL = (GPIO->P[3].MODEL & ~_GPIO_P_MODEL_MODE5_MASK) | GPIO_P_MODEL_MODE5_PUSHPULL;
GPIO->P[3].MODEL = (GPIO->P[3].MODEL & ~_GPIO_P_MODEL_MODE6_MASK) | GPIO_P_MODEL_MODE6_PUSHPULL;
/* Enable Port D, pin 7 for DBG_TCLK */
GPIO->P[3].MODEL = (GPIO->P[3].MODEL & ~_GPIO_P_MODEL_MODE7_MASK) | GPIO_P_MODEL_MODE7_PUSHPULL;
/* Configure trace output for alternate location */
GPIO->ROUTE = GPIO->ROUTE | GPIO_ROUTE_TCLKPEN | GPIO_ROUTE_TD0PEN | GPIO_ROUTE_TD1PEN
| GPIO_ROUTE_TD2PEN | GPIO_ROUTE_TD3PEN
| GPIO_ROUTE_ETMLOCATION_LOC0;
}
/**************************************************************************//**
* @brief Configure trace output for energyAware Profiler
* @note Kit needs to be initialized with SPI-mode;
* @verbatim DVK_init(DVK_Init_SPI); @endverbatim
*****************************************************************************/
void TRACE_SWOSetup(void)
{
/* Debug logic registers */
volatile uint32_t *dwt_ctrl = (uint32_t *) 0xE0001000;
volatile uint32_t *tpiu_prescaler = (uint32_t *) 0xE0040010;
volatile uint32_t *tpiu_protocol = (uint32_t *) 0xE00400F0;
/* Enable GPIO clock */
CMU->HFPERCLKEN0 |= CMU_HFPERCLKEN0_GPIO;
/* Enable Serial wire output pin */
GPIO->ROUTE |= GPIO_ROUTE_SWOPEN;
/* Set location 0 */
GPIO->ROUTE = (GPIO->ROUTE & ~(_GPIO_ROUTE_SWLOCATION_MASK)) | GPIO_ROUTE_SWLOCATION_LOC0;
/* Enable output on pin - GPIO Port F, Pin 2 */
GPIO->P[5].MODEL &= ~(_GPIO_P_MODEL_MODE2_MASK);
GPIO->P[5].MODEL |= GPIO_P_MODEL_MODE2_PUSHPULL;
/* Enable debug clock AUXHFRCO */
CMU->OSCENCMD = CMU_OSCENCMD_AUXHFRCOEN;
/* Wait until clock is ready */
while(!(CMU->STATUS & CMU_STATUS_AUXHFRCORDY));
/* Enable trace in core debug */
CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk;
/* Enable PC and IRQ sampling output */
*dwt_ctrl = 0x400113FF;
/* Set TPIU prescaler to 16. */
*tpiu_prescaler = 0xf;
/* Set protocol to NRZ */
*tpiu_protocol = 2;
/* Unlock ITM and output data */
ITM->LAR = 0xC5ACCE55;
ITM->TCR = 0x10009;
}
/**************************************************************************//**
* @brief Profiler configuration for EFM32GG990F11024/EFM32GG-DK3750
* @return true if energyAware Profiler/SWO is enabled, false if not
* @note If first word of the user page is zero, this will not
* enable SWO profiler output
*****************************************************************************/
bool TRACE_ProfilerSetup(void)
{
volatile uint32_t *userData = (uint32_t *) USER_PAGE;
/* Check magic "trace" word in user page */
if(*userData == 0x00000000UL)
{
return false;
}
else
{
TRACE_SWOSetup();
return true;
}
}
/** @} (end group BSP) */
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