MacroRat / MouseCode

Mouse code for the MacroRat

Dependencies:   ITG3200 QEI

mbed-dev/targets/TARGET_Silicon_Labs/TARGET_EFM32/TARGET_EFR32MG1/device/system_efr32mg1p.c@46:b156ef445742, 2017-06-03 (annotated)

Committer:
sahilmgandhi
Date:
Sat Jun 03 00:22:44 2017 +0000
Revision:
46:b156ef445742
Parent:
18:6a4db94011d3 
Final code for internal battlebot competition.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sahilmgandhi 18:6a4db94011d3 1 /***************************************************************************//**
sahilmgandhi 18:6a4db94011d3 2 * @file system_efr32mg1p.c
sahilmgandhi 18:6a4db94011d3 3 * @brief CMSIS Cortex-M3/M4 System Layer for EFR32 devices.
sahilmgandhi 18:6a4db94011d3 4 * @version 5.1.2
sahilmgandhi 18:6a4db94011d3 5 ******************************************************************************
sahilmgandhi 18:6a4db94011d3 6 * @section License
sahilmgandhi 18:6a4db94011d3 7 * <b>Copyright 2017 Silicon Laboratories, Inc. http://www.silabs.com</b>
sahilmgandhi 18:6a4db94011d3 8 ******************************************************************************
sahilmgandhi 18:6a4db94011d3 9 *
sahilmgandhi 18:6a4db94011d3 10 * Permission is granted to anyone to use this software for any purpose,
sahilmgandhi 18:6a4db94011d3 11 * including commercial applications, and to alter it and redistribute it
sahilmgandhi 18:6a4db94011d3 12 * freely, subject to the following restrictions:
sahilmgandhi 18:6a4db94011d3 13 *
sahilmgandhi 18:6a4db94011d3 14 * 1. The origin of this software must not be misrepresented; you must not
sahilmgandhi 18:6a4db94011d3 15 * claim that you wrote the original software.@n
sahilmgandhi 18:6a4db94011d3 16 * 2. Altered source versions must be plainly marked as such, and must not be
sahilmgandhi 18:6a4db94011d3 17 * misrepresented as being the original software.@n
sahilmgandhi 18:6a4db94011d3 18 * 3. This notice may not be removed or altered from any source distribution.
sahilmgandhi 18:6a4db94011d3 19 *
sahilmgandhi 18:6a4db94011d3 20 * DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Laboratories, Inc.
sahilmgandhi 18:6a4db94011d3 21 * has no obligation to support this Software. Silicon Laboratories, Inc. is
sahilmgandhi 18:6a4db94011d3 22 * providing the Software "AS IS", with no express or implied warranties of any
sahilmgandhi 18:6a4db94011d3 23 * kind, including, but not limited to, any implied warranties of
sahilmgandhi 18:6a4db94011d3 24 * merchantability or fitness for any particular purpose or warranties against
sahilmgandhi 18:6a4db94011d3 25 * infringement of any proprietary rights of a third party.
sahilmgandhi 18:6a4db94011d3 26 *
sahilmgandhi 18:6a4db94011d3 27 * Silicon Laboratories, Inc. will not be liable for any consequential,
sahilmgandhi 18:6a4db94011d3 28 * incidental, or special damages, or any other relief, or for any claim by
sahilmgandhi 18:6a4db94011d3 29 * any third party, arising from your use of this Software.
sahilmgandhi 18:6a4db94011d3 30 *
sahilmgandhi 18:6a4db94011d3 31 *****************************************************************************/
sahilmgandhi 18:6a4db94011d3 32
sahilmgandhi 18:6a4db94011d3 33 #include <stdint.h>
sahilmgandhi 18:6a4db94011d3 34 #include "em_device.h"
sahilmgandhi 18:6a4db94011d3 35
sahilmgandhi 18:6a4db94011d3 36 /*******************************************************************************
sahilmgandhi 18:6a4db94011d3 37 ****************************** DEFINES ************************************
sahilmgandhi 18:6a4db94011d3 38 ******************************************************************************/
sahilmgandhi 18:6a4db94011d3 39
sahilmgandhi 18:6a4db94011d3 40 /** LFRCO frequency, tuned to below frequency during manufacturing. */
sahilmgandhi 18:6a4db94011d3 41 #define EFR32_LFRCO_FREQ (32768UL)
sahilmgandhi 18:6a4db94011d3 42 #define EFR32_ULFRCO_FREQ (1000UL)
sahilmgandhi 18:6a4db94011d3 43
sahilmgandhi 18:6a4db94011d3 44 /*******************************************************************************
sahilmgandhi 18:6a4db94011d3 45 ************************** LOCAL VARIABLES ********************************
sahilmgandhi 18:6a4db94011d3 46 ******************************************************************************/
sahilmgandhi 18:6a4db94011d3 47
sahilmgandhi 18:6a4db94011d3 48 /* System oscillator frequencies. These frequencies are normally constant */
sahilmgandhi 18:6a4db94011d3 49 /* for a target, but they are made configurable in order to allow run-time */
sahilmgandhi 18:6a4db94011d3 50 /* handling of different boards. The crystal oscillator clocks can be set */
sahilmgandhi 18:6a4db94011d3 51 /* compile time to a non-default value by defining respective EFR_nFXO_FREQ */
sahilmgandhi 18:6a4db94011d3 52 /* values according to board design. By defining the EFR_nFXO_FREQ to 0, */
sahilmgandhi 18:6a4db94011d3 53 /* one indicates that the oscillator is not present, in order to save some */
sahilmgandhi 18:6a4db94011d3 54 /* SW footprint. */
sahilmgandhi 18:6a4db94011d3 55
sahilmgandhi 18:6a4db94011d3 56 #ifndef EFR32_HFRCO_MAX_FREQ
sahilmgandhi 18:6a4db94011d3 57 #define EFR32_HFRCO_MAX_FREQ (38000000UL)
sahilmgandhi 18:6a4db94011d3 58 #endif
sahilmgandhi 18:6a4db94011d3 59
sahilmgandhi 18:6a4db94011d3 60 #ifndef EFR32_HFXO_FREQ
sahilmgandhi 18:6a4db94011d3 61 #define EFR32_HFXO_FREQ (38400000UL)
sahilmgandhi 18:6a4db94011d3 62 #endif
sahilmgandhi 18:6a4db94011d3 63
sahilmgandhi 18:6a4db94011d3 64 #ifndef EFR32_HFRCO_STARTUP_FREQ
sahilmgandhi 18:6a4db94011d3 65 #define EFR32_HFRCO_STARTUP_FREQ (19000000UL)
sahilmgandhi 18:6a4db94011d3 66 #endif
sahilmgandhi 18:6a4db94011d3 67
sahilmgandhi 18:6a4db94011d3 68
sahilmgandhi 18:6a4db94011d3 69 /* Do not define variable if HF crystal oscillator not present */
sahilmgandhi 18:6a4db94011d3 70 #if (EFR32_HFXO_FREQ > 0UL)
sahilmgandhi 18:6a4db94011d3 71 /** @cond DO_NOT_INCLUDE_WITH_DOXYGEN */
sahilmgandhi 18:6a4db94011d3 72 /** System HFXO clock. */
sahilmgandhi 18:6a4db94011d3 73 static uint32_t SystemHFXOClock = EFR32_HFXO_FREQ;
sahilmgandhi 18:6a4db94011d3 74 /** @endcond (DO_NOT_INCLUDE_WITH_DOXYGEN) */
sahilmgandhi 18:6a4db94011d3 75 #endif
sahilmgandhi 18:6a4db94011d3 76
sahilmgandhi 18:6a4db94011d3 77 #ifndef EFR32_LFXO_FREQ
sahilmgandhi 18:6a4db94011d3 78 #define EFR32_LFXO_FREQ (EFR32_LFRCO_FREQ)
sahilmgandhi 18:6a4db94011d3 79 #endif
sahilmgandhi 18:6a4db94011d3 80 /* Do not define variable if LF crystal oscillator not present */
sahilmgandhi 18:6a4db94011d3 81 #if (EFR32_LFXO_FREQ > 0UL)
sahilmgandhi 18:6a4db94011d3 82 /** @cond DO_NOT_INCLUDE_WITH_DOXYGEN */
sahilmgandhi 18:6a4db94011d3 83 /** System LFXO clock. */
sahilmgandhi 18:6a4db94011d3 84 static uint32_t SystemLFXOClock = 32768UL;
sahilmgandhi 18:6a4db94011d3 85 /** @endcond (DO_NOT_INCLUDE_WITH_DOXYGEN) */
sahilmgandhi 18:6a4db94011d3 86 #endif
sahilmgandhi 18:6a4db94011d3 87
sahilmgandhi 18:6a4db94011d3 88
sahilmgandhi 18:6a4db94011d3 89 /*******************************************************************************
sahilmgandhi 18:6a4db94011d3 90 ************************** GLOBAL VARIABLES *******************************
sahilmgandhi 18:6a4db94011d3 91 ******************************************************************************/
sahilmgandhi 18:6a4db94011d3 92
sahilmgandhi 18:6a4db94011d3 93 /**
sahilmgandhi 18:6a4db94011d3 94 * @brief
sahilmgandhi 18:6a4db94011d3 95 * System System Clock Frequency (Core Clock).
sahilmgandhi 18:6a4db94011d3 96 *
sahilmgandhi 18:6a4db94011d3 97 * @details
sahilmgandhi 18:6a4db94011d3 98 * Required CMSIS global variable that must be kept up-to-date.
sahilmgandhi 18:6a4db94011d3 99 */
sahilmgandhi 18:6a4db94011d3 100 uint32_t SystemCoreClock;
sahilmgandhi 18:6a4db94011d3 101
sahilmgandhi 18:6a4db94011d3 102
sahilmgandhi 18:6a4db94011d3 103 /**
sahilmgandhi 18:6a4db94011d3 104 * @brief
sahilmgandhi 18:6a4db94011d3 105 * System HFRCO frequency
sahilmgandhi 18:6a4db94011d3 106 *
sahilmgandhi 18:6a4db94011d3 107 * @note
sahilmgandhi 18:6a4db94011d3 108 * This is an EFR32 proprietary variable, not part of the CMSIS definition.
sahilmgandhi 18:6a4db94011d3 109 *
sahilmgandhi 18:6a4db94011d3 110 * @details
sahilmgandhi 18:6a4db94011d3 111 * Frequency of the system HFRCO oscillator
sahilmgandhi 18:6a4db94011d3 112 */
sahilmgandhi 18:6a4db94011d3 113 uint32_t SystemHfrcoFreq = EFR32_HFRCO_STARTUP_FREQ;
sahilmgandhi 18:6a4db94011d3 114
sahilmgandhi 18:6a4db94011d3 115
sahilmgandhi 18:6a4db94011d3 116 /*******************************************************************************
sahilmgandhi 18:6a4db94011d3 117 ************************** GLOBAL FUNCTIONS *******************************
sahilmgandhi 18:6a4db94011d3 118 ******************************************************************************/
sahilmgandhi 18:6a4db94011d3 119
sahilmgandhi 18:6a4db94011d3 120 /***************************************************************************//**
sahilmgandhi 18:6a4db94011d3 121 * @brief
sahilmgandhi 18:6a4db94011d3 122 * Get the current core clock frequency.
sahilmgandhi 18:6a4db94011d3 123 *
sahilmgandhi 18:6a4db94011d3 124 * @details
sahilmgandhi 18:6a4db94011d3 125 * Calculate and get the current core clock frequency based on the current
sahilmgandhi 18:6a4db94011d3 126 * configuration. Assuming that the SystemCoreClock global variable is
sahilmgandhi 18:6a4db94011d3 127 * maintained, the core clock frequency is stored in that variable as well.
sahilmgandhi 18:6a4db94011d3 128 * This function will however calculate the core clock based on actual HW
sahilmgandhi 18:6a4db94011d3 129 * configuration. It will also update the SystemCoreClock global variable.
sahilmgandhi 18:6a4db94011d3 130 *
sahilmgandhi 18:6a4db94011d3 131 * @note
sahilmgandhi 18:6a4db94011d3 132 * This is an EFR32 proprietary function, not part of the CMSIS definition.
sahilmgandhi 18:6a4db94011d3 133 *
sahilmgandhi 18:6a4db94011d3 134 * @return
sahilmgandhi 18:6a4db94011d3 135 * The current core clock frequency in Hz.
sahilmgandhi 18:6a4db94011d3 136 ******************************************************************************/
sahilmgandhi 18:6a4db94011d3 137 uint32_t SystemCoreClockGet(void)
sahilmgandhi 18:6a4db94011d3 138 {
sahilmgandhi 18:6a4db94011d3 139 uint32_t ret;
sahilmgandhi 18:6a4db94011d3 140 uint32_t presc;
sahilmgandhi 18:6a4db94011d3 141
sahilmgandhi 18:6a4db94011d3 142 ret = SystemHFClockGet();
sahilmgandhi 18:6a4db94011d3 143 presc = (CMU->HFCOREPRESC & _CMU_HFCOREPRESC_PRESC_MASK) >>
sahilmgandhi 18:6a4db94011d3 144 _CMU_HFCOREPRESC_PRESC_SHIFT;
sahilmgandhi 18:6a4db94011d3 145 ret /= (presc + 1);
sahilmgandhi 18:6a4db94011d3 146
sahilmgandhi 18:6a4db94011d3 147 /* Keep CMSIS system clock variable up-to-date */
sahilmgandhi 18:6a4db94011d3 148 SystemCoreClock = ret;
sahilmgandhi 18:6a4db94011d3 149
sahilmgandhi 18:6a4db94011d3 150 return ret;
sahilmgandhi 18:6a4db94011d3 151 }
sahilmgandhi 18:6a4db94011d3 152
sahilmgandhi 18:6a4db94011d3 153
sahilmgandhi 18:6a4db94011d3 154 /***************************************************************************//**
sahilmgandhi 18:6a4db94011d3 155 * @brief
sahilmgandhi 18:6a4db94011d3 156 * Get the maximum core clock frequency.
sahilmgandhi 18:6a4db94011d3 157 *
sahilmgandhi 18:6a4db94011d3 158 * @note
sahilmgandhi 18:6a4db94011d3 159 * This is an EFR32 proprietary function, not part of the CMSIS definition.
sahilmgandhi 18:6a4db94011d3 160 *
sahilmgandhi 18:6a4db94011d3 161 * @return
sahilmgandhi 18:6a4db94011d3 162 * The maximum core clock frequency in Hz.
sahilmgandhi 18:6a4db94011d3 163 ******************************************************************************/
sahilmgandhi 18:6a4db94011d3 164 uint32_t SystemMaxCoreClockGet(void)
sahilmgandhi 18:6a4db94011d3 165 {
sahilmgandhi 18:6a4db94011d3 166 return (EFR32_HFRCO_MAX_FREQ > EFR32_HFXO_FREQ ? \
sahilmgandhi 18:6a4db94011d3 167 EFR32_HFRCO_MAX_FREQ : EFR32_HFXO_FREQ);
sahilmgandhi 18:6a4db94011d3 168 }
sahilmgandhi 18:6a4db94011d3 169
sahilmgandhi 18:6a4db94011d3 170
sahilmgandhi 18:6a4db94011d3 171 /***************************************************************************//**
sahilmgandhi 18:6a4db94011d3 172 * @brief
sahilmgandhi 18:6a4db94011d3 173 * Get the current HFCLK frequency.
sahilmgandhi 18:6a4db94011d3 174 *
sahilmgandhi 18:6a4db94011d3 175 * @note
sahilmgandhi 18:6a4db94011d3 176 * This is an EFR32 proprietary function, not part of the CMSIS definition.
sahilmgandhi 18:6a4db94011d3 177 *
sahilmgandhi 18:6a4db94011d3 178 * @return
sahilmgandhi 18:6a4db94011d3 179 * The current HFCLK frequency in Hz.
sahilmgandhi 18:6a4db94011d3 180 ******************************************************************************/
sahilmgandhi 18:6a4db94011d3 181 uint32_t SystemHFClockGet(void)
sahilmgandhi 18:6a4db94011d3 182 {
sahilmgandhi 18:6a4db94011d3 183 uint32_t ret;
sahilmgandhi 18:6a4db94011d3 184
sahilmgandhi 18:6a4db94011d3 185 switch (CMU->HFCLKSTATUS & _CMU_HFCLKSTATUS_SELECTED_MASK)
sahilmgandhi 18:6a4db94011d3 186 {
sahilmgandhi 18:6a4db94011d3 187 case CMU_HFCLKSTATUS_SELECTED_LFXO:
sahilmgandhi 18:6a4db94011d3 188 #if (EFR32_LFXO_FREQ > 0)
sahilmgandhi 18:6a4db94011d3 189 ret = SystemLFXOClock;
sahilmgandhi 18:6a4db94011d3 190 #else
sahilmgandhi 18:6a4db94011d3 191 /* We should not get here, since core should not be clocked. May */
sahilmgandhi 18:6a4db94011d3 192 /* be caused by a misconfiguration though. */
sahilmgandhi 18:6a4db94011d3 193 ret = 0;
sahilmgandhi 18:6a4db94011d3 194 #endif
sahilmgandhi 18:6a4db94011d3 195 break;
sahilmgandhi 18:6a4db94011d3 196
sahilmgandhi 18:6a4db94011d3 197 case CMU_HFCLKSTATUS_SELECTED_LFRCO:
sahilmgandhi 18:6a4db94011d3 198 ret = EFR32_LFRCO_FREQ;
sahilmgandhi 18:6a4db94011d3 199 break;
sahilmgandhi 18:6a4db94011d3 200
sahilmgandhi 18:6a4db94011d3 201 case CMU_HFCLKSTATUS_SELECTED_HFXO:
sahilmgandhi 18:6a4db94011d3 202 #if (EFR32_HFXO_FREQ > 0)
sahilmgandhi 18:6a4db94011d3 203 ret = SystemHFXOClock;
sahilmgandhi 18:6a4db94011d3 204 #else
sahilmgandhi 18:6a4db94011d3 205 /* We should not get here, since core should not be clocked. May */
sahilmgandhi 18:6a4db94011d3 206 /* be caused by a misconfiguration though. */
sahilmgandhi 18:6a4db94011d3 207 ret = 0;
sahilmgandhi 18:6a4db94011d3 208 #endif
sahilmgandhi 18:6a4db94011d3 209 break;
sahilmgandhi 18:6a4db94011d3 210
sahilmgandhi 18:6a4db94011d3 211 default: /* CMU_HFCLKSTATUS_SELECTED_HFRCO */
sahilmgandhi 18:6a4db94011d3 212 ret = SystemHfrcoFreq;
sahilmgandhi 18:6a4db94011d3 213 break;
sahilmgandhi 18:6a4db94011d3 214 }
sahilmgandhi 18:6a4db94011d3 215
sahilmgandhi 18:6a4db94011d3 216 return ret / (1U + ((CMU->HFPRESC & _CMU_HFPRESC_PRESC_MASK)
sahilmgandhi 18:6a4db94011d3 217 >> _CMU_HFPRESC_PRESC_SHIFT));
sahilmgandhi 18:6a4db94011d3 218 }
sahilmgandhi 18:6a4db94011d3 219
sahilmgandhi 18:6a4db94011d3 220
sahilmgandhi 18:6a4db94011d3 221 /**************************************************************************//**
sahilmgandhi 18:6a4db94011d3 222 * @brief
sahilmgandhi 18:6a4db94011d3 223 * Get high frequency crystal oscillator clock frequency for target system.
sahilmgandhi 18:6a4db94011d3 224 *
sahilmgandhi 18:6a4db94011d3 225 * @note
sahilmgandhi 18:6a4db94011d3 226 * This is an EFR32 proprietary function, not part of the CMSIS definition.
sahilmgandhi 18:6a4db94011d3 227 *
sahilmgandhi 18:6a4db94011d3 228 * @return
sahilmgandhi 18:6a4db94011d3 229 * HFXO frequency in Hz.
sahilmgandhi 18:6a4db94011d3 230 *****************************************************************************/
sahilmgandhi 18:6a4db94011d3 231 uint32_t SystemHFXOClockGet(void)
sahilmgandhi 18:6a4db94011d3 232 {
sahilmgandhi 18:6a4db94011d3 233 /* External crystal oscillator present? */
sahilmgandhi 18:6a4db94011d3 234 #if (EFR32_HFXO_FREQ > 0)
sahilmgandhi 18:6a4db94011d3 235 return SystemHFXOClock;
sahilmgandhi 18:6a4db94011d3 236 #else
sahilmgandhi 18:6a4db94011d3 237 return 0;
sahilmgandhi 18:6a4db94011d3 238 #endif
sahilmgandhi 18:6a4db94011d3 239 }
sahilmgandhi 18:6a4db94011d3 240
sahilmgandhi 18:6a4db94011d3 241
sahilmgandhi 18:6a4db94011d3 242 /**************************************************************************//**
sahilmgandhi 18:6a4db94011d3 243 * @brief
sahilmgandhi 18:6a4db94011d3 244 * Set high frequency crystal oscillator clock frequency for target system.
sahilmgandhi 18:6a4db94011d3 245 *
sahilmgandhi 18:6a4db94011d3 246 * @note
sahilmgandhi 18:6a4db94011d3 247 * This function is mainly provided for being able to handle target systems
sahilmgandhi 18:6a4db94011d3 248 * with different HF crystal oscillator frequencies run-time. If used, it
sahilmgandhi 18:6a4db94011d3 249 * should probably only be used once during system startup.
sahilmgandhi 18:6a4db94011d3 250 *
sahilmgandhi 18:6a4db94011d3 251 * @note
sahilmgandhi 18:6a4db94011d3 252 * This is an EFR32 proprietary function, not part of the CMSIS definition.
sahilmgandhi 18:6a4db94011d3 253 *
sahilmgandhi 18:6a4db94011d3 254 * @param[in] freq
sahilmgandhi 18:6a4db94011d3 255 * HFXO frequency in Hz used for target.
sahilmgandhi 18:6a4db94011d3 256 *****************************************************************************/
sahilmgandhi 18:6a4db94011d3 257 void SystemHFXOClockSet(uint32_t freq)
sahilmgandhi 18:6a4db94011d3 258 {
sahilmgandhi 18:6a4db94011d3 259 /* External crystal oscillator present? */
sahilmgandhi 18:6a4db94011d3 260 #if (EFR32_HFXO_FREQ > 0)
sahilmgandhi 18:6a4db94011d3 261 SystemHFXOClock = freq;
sahilmgandhi 18:6a4db94011d3 262
sahilmgandhi 18:6a4db94011d3 263 /* Update core clock frequency if HFXO is used to clock core */
sahilmgandhi 18:6a4db94011d3 264 if ((CMU->HFCLKSTATUS & _CMU_HFCLKSTATUS_SELECTED_MASK) == CMU_HFCLKSTATUS_SELECTED_HFXO)
sahilmgandhi 18:6a4db94011d3 265 {
sahilmgandhi 18:6a4db94011d3 266 /* The function will update the global variable */
sahilmgandhi 18:6a4db94011d3 267 SystemCoreClockGet();
sahilmgandhi 18:6a4db94011d3 268 }
sahilmgandhi 18:6a4db94011d3 269 #else
sahilmgandhi 18:6a4db94011d3 270 (void)freq; /* Unused parameter */
sahilmgandhi 18:6a4db94011d3 271 #endif
sahilmgandhi 18:6a4db94011d3 272 }
sahilmgandhi 18:6a4db94011d3 273
sahilmgandhi 18:6a4db94011d3 274
sahilmgandhi 18:6a4db94011d3 275 /**************************************************************************//**
sahilmgandhi 18:6a4db94011d3 276 * @brief
sahilmgandhi 18:6a4db94011d3 277 * Initialize the system.
sahilmgandhi 18:6a4db94011d3 278 *
sahilmgandhi 18:6a4db94011d3 279 * @details
sahilmgandhi 18:6a4db94011d3 280 * Do required generic HW system init.
sahilmgandhi 18:6a4db94011d3 281 *
sahilmgandhi 18:6a4db94011d3 282 * @note
sahilmgandhi 18:6a4db94011d3 283 * This function is invoked during system init, before the main() routine
sahilmgandhi 18:6a4db94011d3 284 * and any data has been initialized. For this reason, it cannot do any
sahilmgandhi 18:6a4db94011d3 285 * initialization of variables etc.
sahilmgandhi 18:6a4db94011d3 286 *****************************************************************************/
sahilmgandhi 18:6a4db94011d3 287 void SystemInit(void)
sahilmgandhi 18:6a4db94011d3 288 {
sahilmgandhi 18:6a4db94011d3 289 #if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
sahilmgandhi 18:6a4db94011d3 290 /* Set floating point coprosessor access mode. */
sahilmgandhi 18:6a4db94011d3 291 SCB->CPACR |= ((3UL << 10*2) | /* set CP10 Full Access */
sahilmgandhi 18:6a4db94011d3 292 (3UL << 11*2) ); /* set CP11 Full Access */
sahilmgandhi 18:6a4db94011d3 293 #endif
sahilmgandhi 18:6a4db94011d3 294 }
sahilmgandhi 18:6a4db94011d3 295
sahilmgandhi 18:6a4db94011d3 296
sahilmgandhi 18:6a4db94011d3 297 /**************************************************************************//**
sahilmgandhi 18:6a4db94011d3 298 * @brief
sahilmgandhi 18:6a4db94011d3 299 * Get low frequency RC oscillator clock frequency for target system.
sahilmgandhi 18:6a4db94011d3 300 *
sahilmgandhi 18:6a4db94011d3 301 * @note
sahilmgandhi 18:6a4db94011d3 302 * This is an EFR32 proprietary function, not part of the CMSIS definition.
sahilmgandhi 18:6a4db94011d3 303 *
sahilmgandhi 18:6a4db94011d3 304 * @return
sahilmgandhi 18:6a4db94011d3 305 * LFRCO frequency in Hz.
sahilmgandhi 18:6a4db94011d3 306 *****************************************************************************/
sahilmgandhi 18:6a4db94011d3 307 uint32_t SystemLFRCOClockGet(void)
sahilmgandhi 18:6a4db94011d3 308 {
sahilmgandhi 18:6a4db94011d3 309 /* Currently we assume that this frequency is properly tuned during */
sahilmgandhi 18:6a4db94011d3 310 /* manufacturing and is not changed after reset. If future requirements */
sahilmgandhi 18:6a4db94011d3 311 /* for re-tuning by user, we can add support for that. */
sahilmgandhi 18:6a4db94011d3 312 return EFR32_LFRCO_FREQ;
sahilmgandhi 18:6a4db94011d3 313 }
sahilmgandhi 18:6a4db94011d3 314
sahilmgandhi 18:6a4db94011d3 315
sahilmgandhi 18:6a4db94011d3 316 /**************************************************************************//**
sahilmgandhi 18:6a4db94011d3 317 * @brief
sahilmgandhi 18:6a4db94011d3 318 * Get ultra low frequency RC oscillator clock frequency for target system.
sahilmgandhi 18:6a4db94011d3 319 *
sahilmgandhi 18:6a4db94011d3 320 * @note
sahilmgandhi 18:6a4db94011d3 321 * This is an EFR32 proprietary function, not part of the CMSIS definition.
sahilmgandhi 18:6a4db94011d3 322 *
sahilmgandhi 18:6a4db94011d3 323 * @return
sahilmgandhi 18:6a4db94011d3 324 * ULFRCO frequency in Hz.
sahilmgandhi 18:6a4db94011d3 325 *****************************************************************************/
sahilmgandhi 18:6a4db94011d3 326 uint32_t SystemULFRCOClockGet(void)
sahilmgandhi 18:6a4db94011d3 327 {
sahilmgandhi 18:6a4db94011d3 328 /* The ULFRCO frequency is not tuned, and can be very inaccurate */
sahilmgandhi 18:6a4db94011d3 329 return EFR32_ULFRCO_FREQ;
sahilmgandhi 18:6a4db94011d3 330 }
sahilmgandhi 18:6a4db94011d3 331
sahilmgandhi 18:6a4db94011d3 332
sahilmgandhi 18:6a4db94011d3 333 /**************************************************************************//**
sahilmgandhi 18:6a4db94011d3 334 * @brief
sahilmgandhi 18:6a4db94011d3 335 * Get low frequency crystal oscillator clock frequency for target system.
sahilmgandhi 18:6a4db94011d3 336 *
sahilmgandhi 18:6a4db94011d3 337 * @note
sahilmgandhi 18:6a4db94011d3 338 * This is an EFR32 proprietary function, not part of the CMSIS definition.
sahilmgandhi 18:6a4db94011d3 339 *
sahilmgandhi 18:6a4db94011d3 340 * @return
sahilmgandhi 18:6a4db94011d3 341 * LFXO frequency in Hz.
sahilmgandhi 18:6a4db94011d3 342 *****************************************************************************/
sahilmgandhi 18:6a4db94011d3 343 uint32_t SystemLFXOClockGet(void)
sahilmgandhi 18:6a4db94011d3 344 {
sahilmgandhi 18:6a4db94011d3 345 /* External crystal oscillator present? */
sahilmgandhi 18:6a4db94011d3 346 #if (EFR32_LFXO_FREQ > 0)
sahilmgandhi 18:6a4db94011d3 347 return SystemLFXOClock;
sahilmgandhi 18:6a4db94011d3 348 #else
sahilmgandhi 18:6a4db94011d3 349 return 0;
sahilmgandhi 18:6a4db94011d3 350 #endif
sahilmgandhi 18:6a4db94011d3 351 }
sahilmgandhi 18:6a4db94011d3 352
sahilmgandhi 18:6a4db94011d3 353
sahilmgandhi 18:6a4db94011d3 354 /**************************************************************************//**
sahilmgandhi 18:6a4db94011d3 355 * @brief
sahilmgandhi 18:6a4db94011d3 356 * Set low frequency crystal oscillator clock frequency for target system.
sahilmgandhi 18:6a4db94011d3 357 *
sahilmgandhi 18:6a4db94011d3 358 * @note
sahilmgandhi 18:6a4db94011d3 359 * This function is mainly provided for being able to handle target systems
sahilmgandhi 18:6a4db94011d3 360 * with different HF crystal oscillator frequencies run-time. If used, it
sahilmgandhi 18:6a4db94011d3 361 * should probably only be used once during system startup.
sahilmgandhi 18:6a4db94011d3 362 *
sahilmgandhi 18:6a4db94011d3 363 * @note
sahilmgandhi 18:6a4db94011d3 364 * This is an EFR32 proprietary function, not part of the CMSIS definition.
sahilmgandhi 18:6a4db94011d3 365 *
sahilmgandhi 18:6a4db94011d3 366 * @param[in] freq
sahilmgandhi 18:6a4db94011d3 367 * LFXO frequency in Hz used for target.
sahilmgandhi 18:6a4db94011d3 368 *****************************************************************************/
sahilmgandhi 18:6a4db94011d3 369 void SystemLFXOClockSet(uint32_t freq)
sahilmgandhi 18:6a4db94011d3 370 {
sahilmgandhi 18:6a4db94011d3 371 /* External crystal oscillator present? */
sahilmgandhi 18:6a4db94011d3 372 #if (EFR32_LFXO_FREQ > 0)
sahilmgandhi 18:6a4db94011d3 373 SystemLFXOClock = freq;
sahilmgandhi 18:6a4db94011d3 374
sahilmgandhi 18:6a4db94011d3 375 /* Update core clock frequency if LFXO is used to clock core */
sahilmgandhi 18:6a4db94011d3 376 if ((CMU->HFCLKSTATUS & _CMU_HFCLKSTATUS_SELECTED_MASK) == CMU_HFCLKSTATUS_SELECTED_LFXO)
sahilmgandhi 18:6a4db94011d3 377 {
sahilmgandhi 18:6a4db94011d3 378 /* The function will update the global variable */
sahilmgandhi 18:6a4db94011d3 379 SystemCoreClockGet();
sahilmgandhi 18:6a4db94011d3 380 }
sahilmgandhi 18:6a4db94011d3 381 #else
sahilmgandhi 18:6a4db94011d3 382 (void)freq; /* Unused parameter */
sahilmgandhi 18:6a4db94011d3 383 #endif
sahilmgandhi 18:6a4db94011d3 384 }