Diff: targets/TARGET_Silicon_Labs/TARGET_EFM32/clocking.h

Revision:

0:f269e3021894

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_Silicon_Labs/TARGET_EFM32/clocking.h	Sun Oct 23 15:10:02 2016 +0000
@@ -0,0 +1,69 @@
+/***************************************************************************//**
+ * @file clocking.h
+ * @brief Clock selection calculations
+ *******************************************************************************
+ * @section License
+ * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b>
+ *******************************************************************************
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ ******************************************************************************/
+
+#include "device_peripherals.h"
+
+#if( CORE_CLOCK_SOURCE == HFXO)
+# define REFERENCE_FREQUENCY HFXO_FREQUENCY
+#elif( CORE_CLOCK_SOURCE == HFRCO)
+
+# if defined _CMU_HFRCOCTRL_BAND_MASK
+#  if( HFRCO_FREQUENCY == _CMU_HFRCOCTRL_BAND_1MHZ)
+#   define REFERENCE_FREQUENCY 1000000
+#  elif(HFRCO_FREQUENCY == _CMU_HFRCOCTRL_BAND_7MHZ)
+#   define REFERENCE_FREQUENCY 7000000
+#  elif(HFRCO_FREQUENCY == _CMU_HFRCOCTRL_BAND_11MHZ)
+#   define REFERENCE_FREQUENCY 7000000
+#  elif(HFRCO_FREQUENCY == _CMU_HFRCOCTRL_BAND_14MHZ)
+#   define REFERENCE_FREQUENCY 14000000
+#  elif(HFRCO_FREQUENCY == _CMU_HFRCOCTRL_BAND_21MHZ)
+#   define REFERENCE_FREQUENCY 21000000
+#  elif(HFRCO_FREQUENCY == _CMU_HFRCOCTRL_BAND_28MHZ)
+#   define REFERENCE_FREQUENCY 28000000
+#  else
+#   define REFERENCE_FREQUENCY 14000000
+#  endif
+# elif defined _CMU_HFRCOCTRL_FREQRANGE_MASK
+#  define REFERENCE_FREQUENCY HFRCO_FREQUENCY
+# else
+#  error "HFRCO frequency not defined"
+# endif
+#endif
+
+#if ( LOW_ENERGY_CLOCK_SOURCE == LFXO )
+# define LEUART_USING_LFXO
+# if ( (defined(CMU_CTRL_HFLE) || defined(CMU_CTRL_WSHFLE) ) && (REFERENCE_FREQUENCY > 24000000) )
+#  define LEUART_HF_REF_FREQ (REFERENCE_FREQUENCY / 4)
+# else
+#  define LEUART_HF_REF_FREQ (REFERENCE_FREQUENCY / 2)
+# endif
+# define LEUART_LF_REF_FREQ LFXO_FREQUENCY
+#else
+# if ( (defined(CMU_CTRL_HFLE) || defined(CMU_CTRL_WSHFLE) ) && (REFERENCE_FREQUENCY > 24000000) )
+#  define LEUART_REF_FREQ (REFERENCE_FREQUENCY / 4)
+# else
+#  define LEUART_REF_FREQ (REFERENCE_FREQUENCY / 2)
+# endif
+#endif
+