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https://github.com/RIOT-OS/RIOT.git
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64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
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/*
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* Copyright (C) 2018 Bas Stottelaar <basstottelaar@gmail.com>
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup boards_common_silabs_drivers_aem
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* @{
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*
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* @file
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* @brief Implementations of the advanced energy monitor driver.
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*
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* @author Bas Stottelaar <basstottelaar@gmail.com>
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*
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* @}
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*/
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#include "aem.h"
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#include "em_dbg.h"
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#include "em_gpio.h"
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void aem_init(void)
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{
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/* do not initialize if debugger is not connected */
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if (!DBG_Connected()) {
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return;
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}
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/* enable GPIO clock for configuring SWO pins */
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CMU_ClockEnable(cmuClock_HFPER, true);
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CMU_ClockEnable(cmuClock_GPIO, true);
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/* enable debug peripheral via SWO */
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#ifdef _SILICON_LABS_32B_SERIES_0
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DBG_SWOEnable(GPIO_ROUTE_SWLOCATION_LOC0);
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#else
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DBG_SWOEnable(GPIO_ROUTELOC0_SWVLOC_LOC0);
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#endif
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/* enable trace in core debug */
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CoreDebug->DHCSR |= CoreDebug_DHCSR_C_DEBUGEN_Msk;
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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 = AEM_DWT_CTRL;
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/* set TPIU prescaler to 16 */
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TPI->ACPR = AEM_TPI_ACPR;
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/* set protocol to NRZ */
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TPI->SPPR = AEM_TPI_SPPR;
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/* disable continuous formatting */
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TPI->FFCR = AEM_TPI_FFCR;
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/* unlock ITM and output data */
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ITM->LAR = AEM_ITM_LAR;
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ITM->TCR = AEM_ITM_TCR;
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}
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