Piyamate Wisanuvej / mbed-src-overclock

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Fork of mbed-src by mbed official

Files at this revision

API Documentation at this revision

Revision 246:15713155d815, committed 2014-07-01

Comitter:
piyamate
Date:
Tue Jul 01 00:03:52 2014 +0000
Parent:
245:b4dea936db71
Commit message:
Overclock K64F to 128.125MHz

Changed in this revision

targets/cmsis/TARGET_Freescale/TARGET_K64F/system_MK64F12.c Show annotated file Show diff for this revision Revisions of this file 
--- a/targets/cmsis/TARGET_Freescale/TARGET_K64F/system_MK64F12.c	Mon Jun 30 08:00:09 2014 +0100
+++ b/targets/cmsis/TARGET_Freescale/TARGET_K64F/system_MK64F12.c	Tue Jul 01 00:03:52 2014 +0000
@@ -115,6 +115,9 @@
     #define DEFAULT_SYSTEM_CLOCK            120000000u /* Default System clock value */
 #endif /* (CLOCK_SETUP == 4) */
 
+#define OVERCLOCK 1
+#define PRDIV0 0x0F //Device Factor = 16
+#define VDIV0  0x11 //Multiply Factor = 41
 
 /* ----------------------------------------------------------------------------
    -- Core clock
@@ -213,16 +216,28 @@
   /* MCG->C4: DMX32=0,DRST_DRS=0 */
   MCG->C4 &= (uint8_t)~(uint8_t)((MCG_C4_DMX32_MASK | MCG_C4_DRST_DRS(0x03)));
   /* MCG->C5: ?=0,PLLCLKEN0=0,PLLSTEN0=0,PRDIV0=0x13 */
+#if (!OVERCLOCK)
   MCG->C5 = MCG_C5_PRDIV0(0x13);
+#else
+  MCG->C5 = MCG_C5_PRDIV0(PRDIV0);
+#endif
   /* MCG->C6: LOLIE0=0,PLLS=0,CME0=0,VDIV0=0x18 */
+#if (!OVERCLOCK)
   MCG->C6 = MCG_C6_VDIV0(0x18);
+#else
+  MCG->C6 = MCG_C6_VDIV0(VDIV0);
+#endif
   while((MCG->S & MCG_S_IREFST_MASK) != 0x00U) { /* Check that the source of the FLL reference clock is the external reference clock. */
   }
   while((MCG->S & 0x0CU) != 0x08U) {    /* Wait until external reference clock is selected as MCG output */
   }
   /* Switch to PBE Mode */
   /* MCG->C6: LOLIE0=0,PLLS=1,CME0=0,VDIV0=0x18 */
+#if (!OVERCLOCK)
   MCG->C6 = (MCG_C6_PLLS_MASK | MCG_C6_VDIV0(0x18));
+#else
+  MCG->C6 = (MCG_C6_PLLS_MASK | MCG_C6_VDIV0(VDIV0));
+#endif
   while((MCG->S & 0x0CU) != 0x08U) {    /* Wait until external reference clock is selected as MCG output */
   }
   while((MCG->S & MCG_S_LOCK0_MASK) == 0x00U) { /* Wait until locked */