forked from Imagelibrary/rtems
32 lines
630 B
C
32 lines
630 B
C
/*
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* Copyright (c) 2016 embedded brains GmbH. All rights reserved.
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*
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* embedded brains GmbH
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* Dornierstr. 4
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* 82178 Puchheim
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* Germany
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* <rtems@embedded-brains.de>
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#include <bsp.h>
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#include <chip.h>
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uint32_t atsam_systick_frequency(void)
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{
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uint32_t mdiv = (PMC->PMC_MCKR & PMC_MCKR_MDIV_Msk) >> PMC_MCKR_MDIV_Pos;
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uint32_t fclk;
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if (mdiv == 3) {
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fclk = BOARD_MCK * mdiv;
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} else {
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fclk = BOARD_MCK * (1 << mdiv);
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}
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return fclk;
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}
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