blob: 060fa17c1efa8bfde79ef0ae8f8dbe3954df5538 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
/*
* Copyright (c) 2016 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#include <bsp.h>
#include <chip.h>
uint32_t atsam_systick_frequency(void)
{
uint32_t mdiv = (PMC->PMC_MCKR & PMC_MCKR_MDIV_Msk) >> PMC_MCKR_MDIV_Pos;
uint32_t fclk;
if (mdiv == 3) {
fclk = BOARD_MCK * mdiv;
} else {
fclk = BOARD_MCK * (1 << mdiv);
}
return fclk;
}
|