Diff: TARGET_EFM32GG_STK3700/TOOLCHAIN_IAR/clocking.h

Revision:

171:3a7713b1edbc

Parent:

169:a7c7b631e539

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TARGET_EFM32GG_STK3700/TOOLCHAIN_IAR/clocking.h	Thu Nov 08 11:45:42 2018 +0000
@@ -0,0 +1,117 @@
+/***************************************************************************//**
+ * @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.
+ *
+ ******************************************************************************/
+#ifndef MBED_CLOCKING_H
+#define MBED_CLOCKING_H
+
+#include "em_cmu.h"
+
+/* Clock definitions */
+#define LFXO    0
+#define HFXO    1
+#define LFRCO   2
+#define HFRCO   3
+#if !defined(_EFM32_GECKO_FAMILY)
+#define ULFRCO  4
+#endif
+
+/* Low Energy peripheral clock source.
+ * Options:
+ *  * LFXO: external crystal, please define frequency.
+ *  * LFRCO: internal RC oscillator (32.768kHz)
+ *  * ULFRCO: internal ultra-low power RC oscillator (available down to EM3) (1kHz)
+ */
+#ifndef LOW_ENERGY_CLOCK_SOURCE
+#define LOW_ENERGY_CLOCK_SOURCE LFXO
+#endif
+
+/** Core clock source.
+ * Options:
+ *  * HFXO: external crystal, please define frequency.
+ *  * HFRCO: High-frequency internal RC oscillator. Please select band as well.
+ */
+#ifndef CORE_CLOCK_SOURCE
+#define CORE_CLOCK_SOURCE   HFRCO
+#if defined(_CMU_HFRCOCTRL_BAND_MASK)
+#define HFRCO_FREQUENCY_ENUM   _CMU_HFRCOCTRL_BAND_21MHZ
+#define HFRCO_FREQUENCY        21000000
+#elif defined(_CMU_HFRCOCTRL_FREQRANGE_MASK)
+#define HFRCO_FREQUENCY_ENUM   cmuHFRCOFreq_32M0Hz
+#define HFRCO_FREQUENCY        32000000
+#endif
+#endif // CORE_CLOCK_SOURCE
+
+#if !defined(LFXO_FREQUENCY) && (LOW_ENERGY_CLOCK_SOURCE == LFXO)
+#error "LFXO frequency is undefined!"
+#endif
+
+#if !defined(HFXO_FREQUENCY) && (CORE_CLOCK_SOURCE == HFXO)
+#error "HFXO frequency is undefined!"
+#endif
+
+#if (LOW_ENERGY_CLOCK_SOURCE == LFXO)
+#define LOW_ENERGY_CLOCK_FREQUENCY  LFXO_FREQUENCY
+#elif (LOW_ENERGY_CLOCK_SOURCE == LFRCO)
+#define LOW_ENERGY_CLOCK_FREQUENCY  32768
+#elif (LOW_ENERGY_CLOCK_SOURCE == ULFRCO)
+#define LOW_ENERGY_CLOCK_FREQUENCY  1000
+#else
+#error "Unknown Low Energy Clock selection"
+#endif
+
+#if( CORE_CLOCK_SOURCE == HFXO)
+# define REFERENCE_FREQUENCY HFXO_FREQUENCY
+#elif( CORE_CLOCK_SOURCE == HFRCO)
+#if !defined(HFRCO_FREQUENCY)
+# error "HFRCO frequency is not defined!"
+#else
+# define REFERENCE_FREQUENCY HFRCO_FREQUENCY
+#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
+
+/* Adjust this to change speed of RTC and LP ticker ticks */
+#define RTC_CLOCKDIV        cmuClkDiv_1
+/* Adjust this to match RTC_CLOCKDIV as integer value */
+#define RTC_CLOCKDIV_INT    1U
+/* Adjust this to match RTC_CLOCKDIV as shift for 1 second worth of ticks.
+ * E.g. with 32768 Hz crystal and CLOCKDIV of 8, 1 second is 4096 ticks.
+ * 4096 equals 1 << 12, so RTC_FREQ_SHIFT needs to be 12. */
+#define RTC_FREQ_SHIFT      15U
+
+#endif