45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
/* time-STM32F2.c
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*
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* Copyright (C) 2006-2020 wolfSSL Inc.
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*
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* This file is part of wolfSSL.
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*
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* wolfSSL is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* wolfSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <wolfssl/wolfcrypt/settings.h>
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#include <stdint.h>
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#define DWT ((DWT_Type *) (0xE0001000UL) )
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typedef struct
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{
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uint32_t CTRL; /*!< Offset: 0x000 (R/W) Control Register */
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uint32_t CYCCNT; /*!< Offset: 0x004 (R/W) Cycle Count Register */
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} DWT_Type;
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extern uint32_t SystemCoreClock ;
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double current_time(int reset)
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{
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if(reset) DWT->CYCCNT = 0 ;
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return ((double)DWT->CYCCNT/SystemCoreClock) ;
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}
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