1 files changed, 31 insertions, 0 deletions
diff --git a/bsps/arm/atsam/clock/systick-freq.c b/bsps/arm/atsam/clock/systick-freq.c
new file mode 100644
index 0000000000..060fa17c1e
--- /dev/null
+++ b/bsps/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;
+}