116 lines
4.5 KiB
C
116 lines
4.5 KiB
C
/**************************************************************************//**
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* @file
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* @brief API for enabling SWO or ETM trace on DK3750 board
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* @author Energy Micro AS
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* @version 1.2.2
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******************************************************************************
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* @section License
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* <b>(C) Copyright 2011 Energy Micro AS, http://www.energymicro.com</b>
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******************************************************************************
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*
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* This source code is the property of Energy Micro AS. The source and compiled
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* code may only be used on Energy Micro "EFM32" microcontrollers.
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*
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* This copyright notice may not be removed from the source code nor changed.
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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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/***************************************************************************//**
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* @addtogroup BSP
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* @{
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******************************************************************************/
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#include "efm32.h"
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#include "efm32_gpio.h"
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#include "efm32_cmu.h"
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/**************************************************************************//**
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* @brief Configure EFM32GG990F1024 for DK3750 ETM trace output
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* @note You need to configure ETM trace on on kit config menu as well!
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*****************************************************************************/
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void TRACE_ETMSetup(void)
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{
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/* Enable peripheral clocks */
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CMU->HFCORECLKEN0 |= CMU_HFCORECLKEN0_LE;
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CMU->HFPERCLKEN0 |= CMU_HFPERCLKEN0_GPIO;
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CMU->OSCENCMD = CMU_OSCENCMD_AUXHFRCOEN;
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/* Wait until AUXHFRCO clock is ready */
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while (!(CMU->STATUS & CMU_STATUS_AUXHFRCORDY)) ;
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/* Enable Port D, pins 3,4,5,6 for ETM Trace Data output */
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GPIO->P[3].MODEL = (GPIO->P[3].MODEL & ~_GPIO_P_MODEL_MODE3_MASK) | GPIO_P_MODEL_MODE3_PUSHPULL;
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GPIO->P[3].MODEL = (GPIO->P[3].MODEL & ~_GPIO_P_MODEL_MODE4_MASK) | GPIO_P_MODEL_MODE4_PUSHPULL;
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GPIO->P[3].MODEL = (GPIO->P[3].MODEL & ~_GPIO_P_MODEL_MODE5_MASK) | GPIO_P_MODEL_MODE5_PUSHPULL;
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GPIO->P[3].MODEL = (GPIO->P[3].MODEL & ~_GPIO_P_MODEL_MODE6_MASK) | GPIO_P_MODEL_MODE6_PUSHPULL;
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/* Enable Port D, pin 7 for DBG_TCLK */
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GPIO->P[3].MODEL = (GPIO->P[3].MODEL & ~_GPIO_P_MODEL_MODE7_MASK) | GPIO_P_MODEL_MODE7_PUSHPULL;
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/* Configure trace output for alternate location */
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GPIO->ROUTE = GPIO->ROUTE | GPIO_ROUTE_TCLKPEN | GPIO_ROUTE_TD0PEN | GPIO_ROUTE_TD1PEN
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| GPIO_ROUTE_TD2PEN | GPIO_ROUTE_TD3PEN
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| GPIO_ROUTE_ETMLOCATION_LOC0;
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}
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/**************************************************************************//**
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* @brief Configure EFM32GG990F1024 for DK3750 SWO trace output
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*****************************************************************************/
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void TRACE_SWOSetup(void)
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{
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/* Debug logic registers */
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volatile uint32_t *dwt_ctrl = (uint32_t *) 0xE0001000;
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volatile uint32_t *tpiu_prescaler = (uint32_t *) 0xE0040010;
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volatile 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 0 */
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GPIO->ROUTE = (GPIO->ROUTE & ~(_GPIO_ROUTE_SWLOCATION_MASK)) | GPIO_ROUTE_SWLOCATION_LOC0;
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/* Enable output on pin - GPIO Port F, Pin 2 */
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GPIO->P[5].MODEL &= ~(_GPIO_P_MODEL_MODE2_MASK);
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GPIO->P[5].MODEL |= GPIO_P_MODEL_MODE2_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->DHCSR |= 1;
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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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/** @} (end group BSP) */
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