Add Kinetis clocking logic and some UART logic. Add K60 Tower configuration

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3876 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 32 insertions, 0 deletions

diff --git a/nuttx/configs/kwikstik-k40/include/board.h b/nuttx/configs/kwikstik-k40/include/board.h
index be47b9ebf..85f2afeb5 100755
--- a/nuttx/configs/kwikstik-k40/include/board.h
+++ b/nuttx/configs/kwikstik-k40/include/board.h
@@ -51,6 +51,38 @@
  ************************************************************************************/
 
 /* Clocking *************************************************************************/
+/* The Kwikstik-K40 has a 4MHz crystal on board */
+
+#undef  BOARD_EXTCLOCK                      /* Crystal */
+#define BOARD_EXTAL_FREQ     4000000        /* 4MHz crystal frequency (REFCLK) */
+#define BOARD_XTAL32_FREQ    32768          /* 32KHz RTC Oscillator */
+
+/* PLL Configuration.  NOTE: Only even frequency crystals are supported that will
+ * produce a 2MHz reference clock to the PLL.
+ *
+ *   PLL Input frequency:   PLLIN  = REFCLK/PRDIV = 4MHz/2 = 2MHz
+ *   PLL Output frequency:  PLLOUT = PLLIN*VDIV   = 2Mhz*48 = 96MHz
+ *   MCG Frequency:         PLLOUT = 96MHz
+ */
+
+#define BOARD_PRDIV          2              /* PLL External Reference Divider */
+#define BOARD_VDIV           48             /* PLL VCO Divider (frequency multiplier) */
+
+#define BOARD_PLLIN_FREQ     (BOARD_EXTAL_FREQ / BOARD_PRDIV)
+#define BOARD_PLLOUT_FREQ    (BOARD_EXTAL_FREQ * BOARD_VDIV)
+#define BOARD_MCG_FREQ       BOARD_PLL_FREQ
+
+/* SIM CLKDIV1 dividers */
+
+#define BOARD_OUTDIV1        1              /* Core        = MCG, 96MHz */
+#define BOARD_OUTDIV2        2              /* Bus         = MCG/2, 48MHz */
+#define BOARD_OUTDIV3        2              /* FlexBus     = MCG/2, 48MHz */
+#define BOARD_OUTDIV4        4              /* Flash clock = MCG/4, 24MHz */
+
+#define BOARD_CORECLK_FREQ  (BOARD_MCG_FREQ / BOARD_OUTDIV1)
+#define BOARD_BUS_FREQ      (BOARD_MCG_FREQ / BOARD_OUTDIV2)
+#define BOARD_FLEXBUS_FREQ  (BOARD_MCG_FREQ / BOARD_OUTDIV3)
+#define BOARD_FLASHCLK_FREQ (BOARD_MCG_FREQ / BOARD_OUTDIV4)
 
 /* LED definitions ******************************************************************/