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| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2016-01-14 16:03:51 +0100 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2016-01-19 08:36:21 +0100 |
| commit | f2e0f8e1a769231257f38a6bb6ab9ea9bbad452f (patch) | |
| tree | 498136ee92c83d03789b5c378de0d0b7ed1e2cdc /c/src/lib/libbsp/arm/atsam/clock/systick-freq.c | |
| parent | bsp/atsam: Port SAM Software Package to RTEMS (diff) | |
| download | rtems-f2e0f8e1a769231257f38a6bb6ab9ea9bbad452f.tar.bz2 | |
bsp/atsam: New
Close #2529.
Diffstat (limited to 'c/src/lib/libbsp/arm/atsam/clock/systick-freq.c')
| -rw-r--r-- | c/src/lib/libbsp/arm/atsam/clock/systick-freq.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/arm/atsam/clock/systick-freq.c b/c/src/lib/libbsp/arm/atsam/clock/systick-freq.c new file mode 100644 index 0000000000..060fa17c1e --- /dev/null +++ b/c/src/lib/libbsp/arm/atsam/clock/systick-freq.c @@ -0,0 +1,31 @@ +/* + * 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; +} |