Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/emlib/src/em_rmu.c@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Child:
50:a417edff4437
Initial commit on mbed-dev



Replaces mbed-src (now inactive)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 2 * @file em_rmu.c
bogdanm 0:9b334a45a8ff 3 * @brief Reset Management Unit (RMU) peripheral module peripheral API
bogdanm 0:9b334a45a8ff 4 *
bogdanm 0:9b334a45a8ff 5 * @version 3.20.12
bogdanm 0:9b334a45a8ff 6 *******************************************************************************
bogdanm 0:9b334a45a8ff 7 * @section License
bogdanm 0:9b334a45a8ff 8 * <b>(C) Copyright 2014 Silicon Labs, http://www.silabs.com</b>
bogdanm 0:9b334a45a8ff 9 *******************************************************************************
bogdanm 0:9b334a45a8ff 10 *
bogdanm 0:9b334a45a8ff 11 * Permission is granted to anyone to use this software for any purpose,
bogdanm 0:9b334a45a8ff 12 * including commercial applications, and to alter it and redistribute it
bogdanm 0:9b334a45a8ff 13 * freely, subject to the following restrictions:
bogdanm 0:9b334a45a8ff 14 *
bogdanm 0:9b334a45a8ff 15 * 1. The origin of this software must not be misrepresented; you must not
bogdanm 0:9b334a45a8ff 16 * claim that you wrote the original software.
bogdanm 0:9b334a45a8ff 17 * 2. Altered source versions must be plainly marked as such, and must not be
bogdanm 0:9b334a45a8ff 18 * misrepresented as being the original software.
bogdanm 0:9b334a45a8ff 19 * 3. This notice may not be removed or altered from any source distribution.
bogdanm 0:9b334a45a8ff 20 *
bogdanm 0:9b334a45a8ff 21 * DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no
bogdanm 0:9b334a45a8ff 22 * obligation to support this Software. Silicon Labs is providing the
bogdanm 0:9b334a45a8ff 23 * Software "AS IS", with no express or implied warranties of any kind,
bogdanm 0:9b334a45a8ff 24 * including, but not limited to, any implied warranties of merchantability
bogdanm 0:9b334a45a8ff 25 * or fitness for any particular purpose or warranties against infringement
bogdanm 0:9b334a45a8ff 26 * of any proprietary rights of a third party.
bogdanm 0:9b334a45a8ff 27 *
bogdanm 0:9b334a45a8ff 28 * Silicon Labs will not be liable for any consequential, incidental, or
bogdanm 0:9b334a45a8ff 29 * special damages, or any other relief, or for any claim by any third party,
bogdanm 0:9b334a45a8ff 30 * arising from your use of this Software.
bogdanm 0:9b334a45a8ff 31 *
bogdanm 0:9b334a45a8ff 32 ******************************************************************************/
bogdanm 0:9b334a45a8ff 33
bogdanm 0:9b334a45a8ff 34
bogdanm 0:9b334a45a8ff 35 #include "em_rmu.h"
bogdanm 0:9b334a45a8ff 36 #if defined(RMU_COUNT) && (RMU_COUNT > 0)
bogdanm 0:9b334a45a8ff 37
bogdanm 0:9b334a45a8ff 38 #include "em_emu.h"
bogdanm 0:9b334a45a8ff 39 #include "em_bitband.h"
bogdanm 0:9b334a45a8ff 40
bogdanm 0:9b334a45a8ff 41 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 42 * @addtogroup EM_Library
bogdanm 0:9b334a45a8ff 43 * @{
bogdanm 0:9b334a45a8ff 44 ******************************************************************************/
bogdanm 0:9b334a45a8ff 45
bogdanm 0:9b334a45a8ff 46 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 47 * @addtogroup RMU
bogdanm 0:9b334a45a8ff 48 * @brief Reset Management Unit (RMU) Peripheral API
bogdanm 0:9b334a45a8ff 49 * @{
bogdanm 0:9b334a45a8ff 50 ******************************************************************************/
bogdanm 0:9b334a45a8ff 51
bogdanm 0:9b334a45a8ff 52 /*******************************************************************************
bogdanm 0:9b334a45a8ff 53 ***************************** DEFINES *********************************
bogdanm 0:9b334a45a8ff 54 ******************************************************************************/
bogdanm 0:9b334a45a8ff 55
bogdanm 0:9b334a45a8ff 56 /** @cond DO_NOT_INCLUDE_WITH_DOXYGEN */
bogdanm 0:9b334a45a8ff 57
bogdanm 0:9b334a45a8ff 58 /* Reset cause "don't care" definitions.
bogdanm 0:9b334a45a8ff 59 1's mark the bits that must be zero, zeros are "don't cares". */
bogdanm 0:9b334a45a8ff 60 #define RMU_RSTCAUSE_PORST_XMASK (0x00000000) /**0b0000000000000000 < Power On Reset */
bogdanm 0:9b334a45a8ff 61 #define RMU_RSTCAUSE_BODUNREGRST_XMASK (0x00000081) /**0b0000000010000001 < Brown Out Detector Unregulated Domain Reset */
bogdanm 0:9b334a45a8ff 62 #define RMU_RSTCAUSE_BODREGRST_XMASK (0x00000091) /**0b0000000010010001 < Brown Out Detector Regulated Domain Reset */
bogdanm 0:9b334a45a8ff 63 #define RMU_RSTCAUSE_EXTRST_XMASK (0x00000001) /**0b0000000000000001 < External Pin Reset */
bogdanm 0:9b334a45a8ff 64 #define RMU_RSTCAUSE_WDOGRST_XMASK (0x00000003) /**0b0000000000000011 < Watchdog Reset */
bogdanm 0:9b334a45a8ff 65 #define RMU_RSTCAUSE_LOCKUPRST_XMASK (0x0000EFDF) /**0b1110111111011111 < LOCKUP Reset */
bogdanm 0:9b334a45a8ff 66 #define RMU_RSTCAUSE_SYSREQRST_XMASK (0x0000EF9F) /**0b1110111110011111 < System Request Reset */
bogdanm 0:9b334a45a8ff 67 #define NUM_RSTCAUSES (7)
bogdanm 0:9b334a45a8ff 68 #ifndef _EFM32_GECKO_FAMILY
bogdanm 0:9b334a45a8ff 69 #define RMU_RSTCAUSE_EM4RST_XMASK (0x00000719) /**0b0000011100011001 < EM4 Reset */
bogdanm 0:9b334a45a8ff 70 #define RMU_RSTCAUSE_EM4WURST_XMASK (0x00000619) /**0b0000011000011001 < EM4 Wake-up Reset */
bogdanm 0:9b334a45a8ff 71 #define RMU_RSTCAUSE_BODAVDD0_XMASK (0x0000041F) /**0b0000010000011111 < AVDD0 Bod Reset. */
bogdanm 0:9b334a45a8ff 72 #define RMU_RSTCAUSE_BODAVDD1_XMASK (0x0000021F) /**0b0000001000011111 < AVDD1 Bod Reset. */
bogdanm 0:9b334a45a8ff 73 #undef NUM_RSTCAUSES
bogdanm 0:9b334a45a8ff 74 #define NUM_RSTCAUSES (11)
bogdanm 0:9b334a45a8ff 75 #endif
bogdanm 0:9b334a45a8ff 76 #ifdef BU_PRESENT
bogdanm 0:9b334a45a8ff 77 #define RMU_RSTCAUSE_BUBODVDDDREG_XMASK (0x00000001) /**0b0000000000000001 < Backup Brown Out Detector, VDD_DREG */
bogdanm 0:9b334a45a8ff 78 #define RMU_RSTCAUSE_BUBODBUVIN_XMASK (0x00000001) /**0b0000000000000001 < Backup Brown Out Detector, BU_VIN */
bogdanm 0:9b334a45a8ff 79 #define RMU_RSTCAUSE_BUBODUNREG_XMASK (0x00000001) /**0b0000000000000001 < Backup Brown Out Detector Unregulated Domain */
bogdanm 0:9b334a45a8ff 80 #define RMU_RSTCAUSE_BUBODREG_XMASK (0x00000001) /**0b0000000000000001 < Backup Brown Out Detector Regulated Domain */
bogdanm 0:9b334a45a8ff 81 #define RMU_RSTCAUSE_BUMODERST_XMASK (0x00000001) /**0b0000000000000001 < Backup mode reset */
bogdanm 0:9b334a45a8ff 82 #undef NUM_RSTCAUSES
bogdanm 0:9b334a45a8ff 83 #define NUM_RSTCAUSES (16)
bogdanm 0:9b334a45a8ff 84 #endif
bogdanm 0:9b334a45a8ff 85
bogdanm 0:9b334a45a8ff 86 /*******************************************************************************
bogdanm 0:9b334a45a8ff 87 ******************************* STRUCTS ***********************************
bogdanm 0:9b334a45a8ff 88 ******************************************************************************/
bogdanm 0:9b334a45a8ff 89
bogdanm 0:9b334a45a8ff 90 /** Reset cause mask type. */
bogdanm 0:9b334a45a8ff 91 typedef struct
bogdanm 0:9b334a45a8ff 92 {
bogdanm 0:9b334a45a8ff 93 uint32_t resetCauseMask;
bogdanm 0:9b334a45a8ff 94 uint32_t dontCareMask;
bogdanm 0:9b334a45a8ff 95 } RMU_ResetCauseMasks_Typedef;
bogdanm 0:9b334a45a8ff 96
bogdanm 0:9b334a45a8ff 97
bogdanm 0:9b334a45a8ff 98 /*******************************************************************************
bogdanm 0:9b334a45a8ff 99 ******************************* TYPEDEFS **********************************
bogdanm 0:9b334a45a8ff 100 ******************************************************************************/
bogdanm 0:9b334a45a8ff 101
bogdanm 0:9b334a45a8ff 102 /** Reset cause mask table. */
bogdanm 0:9b334a45a8ff 103 static const RMU_ResetCauseMasks_Typedef resetCauseMasks[NUM_RSTCAUSES] =
bogdanm 0:9b334a45a8ff 104 {
bogdanm 0:9b334a45a8ff 105 { RMU_RSTCAUSE_PORST, RMU_RSTCAUSE_PORST_XMASK },
bogdanm 0:9b334a45a8ff 106 { RMU_RSTCAUSE_BODUNREGRST, RMU_RSTCAUSE_BODUNREGRST_XMASK },
bogdanm 0:9b334a45a8ff 107 { RMU_RSTCAUSE_BODREGRST, RMU_RSTCAUSE_BODREGRST_XMASK },
bogdanm 0:9b334a45a8ff 108 { RMU_RSTCAUSE_EXTRST, RMU_RSTCAUSE_EXTRST_XMASK },
bogdanm 0:9b334a45a8ff 109 { RMU_RSTCAUSE_WDOGRST, RMU_RSTCAUSE_WDOGRST_XMASK },
bogdanm 0:9b334a45a8ff 110 { RMU_RSTCAUSE_LOCKUPRST, RMU_RSTCAUSE_LOCKUPRST_XMASK },
bogdanm 0:9b334a45a8ff 111 { RMU_RSTCAUSE_SYSREQRST, RMU_RSTCAUSE_SYSREQRST_XMASK },
bogdanm 0:9b334a45a8ff 112 #ifndef _EFM32_GECKO_FAMILY
bogdanm 0:9b334a45a8ff 113 { RMU_RSTCAUSE_EM4RST, RMU_RSTCAUSE_EM4RST_XMASK },
bogdanm 0:9b334a45a8ff 114 { RMU_RSTCAUSE_EM4WURST, RMU_RSTCAUSE_EM4WURST_XMASK },
bogdanm 0:9b334a45a8ff 115 { RMU_RSTCAUSE_BODAVDD0, RMU_RSTCAUSE_BODAVDD0_XMASK },
bogdanm 0:9b334a45a8ff 116 { RMU_RSTCAUSE_BODAVDD1, RMU_RSTCAUSE_BODAVDD1_XMASK },
bogdanm 0:9b334a45a8ff 117 #endif
bogdanm 0:9b334a45a8ff 118 #ifdef BU_PRESENT
bogdanm 0:9b334a45a8ff 119 { RMU_RSTCAUSE_BUBODVDDDREG, RMU_RSTCAUSE_BUBODVDDDREG_XMASK },
bogdanm 0:9b334a45a8ff 120 { RMU_RSTCAUSE_BUBODBUVIN, RMU_RSTCAUSE_BUBODBUVIN_XMASK },
bogdanm 0:9b334a45a8ff 121 { RMU_RSTCAUSE_BUBODUNREG, RMU_RSTCAUSE_BUBODUNREG_XMASK },
bogdanm 0:9b334a45a8ff 122 { RMU_RSTCAUSE_BUBODREG, RMU_RSTCAUSE_BUBODREG_XMASK },
bogdanm 0:9b334a45a8ff 123 { RMU_RSTCAUSE_BUMODERST, RMU_RSTCAUSE_BUMODERST_XMASK },
bogdanm 0:9b334a45a8ff 124 #endif
bogdanm 0:9b334a45a8ff 125 };
bogdanm 0:9b334a45a8ff 126
bogdanm 0:9b334a45a8ff 127
bogdanm 0:9b334a45a8ff 128 /*******************************************************************************
bogdanm 0:9b334a45a8ff 129 ******************************** TEST ********************************
bogdanm 0:9b334a45a8ff 130 ******************************************************************************/
bogdanm 0:9b334a45a8ff 131 #ifdef EMLIB_REGRESSION_TEST
bogdanm 0:9b334a45a8ff 132 /* Test variable that replaces the RSTCAUSE cause register when testing
bogdanm 0:9b334a45a8ff 133 the RMU_ResetCauseGet function. */
bogdanm 0:9b334a45a8ff 134 extern uint32_t rstCause;
bogdanm 0:9b334a45a8ff 135 #endif
bogdanm 0:9b334a45a8ff 136
bogdanm 0:9b334a45a8ff 137
bogdanm 0:9b334a45a8ff 138 /** @endcond */
bogdanm 0:9b334a45a8ff 139
bogdanm 0:9b334a45a8ff 140 /*******************************************************************************
bogdanm 0:9b334a45a8ff 141 ************************** GLOBAL FUNCTIONS *******************************
bogdanm 0:9b334a45a8ff 142 ******************************************************************************/
bogdanm 0:9b334a45a8ff 143
bogdanm 0:9b334a45a8ff 144 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 145 * @brief
bogdanm 0:9b334a45a8ff 146 * Disable/enable reset for various peripherals and signal sources
bogdanm 0:9b334a45a8ff 147 *
bogdanm 0:9b334a45a8ff 148 * @param[in] reset Reset types to enable/disable
bogdanm 0:9b334a45a8ff 149 *
bogdanm 0:9b334a45a8ff 150 * @param[in] enable
bogdanm 0:9b334a45a8ff 151 * @li false - Disable reset signal or flag
bogdanm 0:9b334a45a8ff 152 * @li true - Enable reset signal or flag
bogdanm 0:9b334a45a8ff 153 ******************************************************************************/
bogdanm 0:9b334a45a8ff 154 void RMU_ResetControl(RMU_Reset_TypeDef reset, bool enable)
bogdanm 0:9b334a45a8ff 155 {
bogdanm 0:9b334a45a8ff 156 BITBAND_Peripheral(&(RMU->CTRL), (uint32_t)reset, (uint32_t)enable);
bogdanm 0:9b334a45a8ff 157 }
bogdanm 0:9b334a45a8ff 158
bogdanm 0:9b334a45a8ff 159
bogdanm 0:9b334a45a8ff 160 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 161 * @brief
bogdanm 0:9b334a45a8ff 162 * Clear the reset cause register.
bogdanm 0:9b334a45a8ff 163 *
bogdanm 0:9b334a45a8ff 164 * @details
bogdanm 0:9b334a45a8ff 165 * This function clears all the reset cause bits of the RSTCAUSE register.
bogdanm 0:9b334a45a8ff 166 * The reset cause bits must be cleared by SW before a new reset occurs,
bogdanm 0:9b334a45a8ff 167 * otherwise reset causes may accumulate. See @ref RMU_ResetCauseGet().
bogdanm 0:9b334a45a8ff 168 ******************************************************************************/
bogdanm 0:9b334a45a8ff 169 void RMU_ResetCauseClear(void)
bogdanm 0:9b334a45a8ff 170 {
bogdanm 0:9b334a45a8ff 171 uint32_t locked;
bogdanm 0:9b334a45a8ff 172
bogdanm 0:9b334a45a8ff 173 RMU->CMD = RMU_CMD_RCCLR;
bogdanm 0:9b334a45a8ff 174
bogdanm 0:9b334a45a8ff 175 /* Clear some reset causes not cleared with RMU CMD register */
bogdanm 0:9b334a45a8ff 176 /* (If EMU registers locked, they must be unlocked first) */
bogdanm 0:9b334a45a8ff 177 locked = EMU->LOCK & EMU_LOCK_LOCKKEY_LOCKED;
bogdanm 0:9b334a45a8ff 178 if (locked)
bogdanm 0:9b334a45a8ff 179 {
bogdanm 0:9b334a45a8ff 180 EMU_Unlock();
bogdanm 0:9b334a45a8ff 181 }
bogdanm 0:9b334a45a8ff 182
bogdanm 0:9b334a45a8ff 183 BITBAND_Peripheral(&(EMU->AUXCTRL), 0, 1);
bogdanm 0:9b334a45a8ff 184 BITBAND_Peripheral(&(EMU->AUXCTRL), 0, 0);
bogdanm 0:9b334a45a8ff 185
bogdanm 0:9b334a45a8ff 186 if (locked)
bogdanm 0:9b334a45a8ff 187 {
bogdanm 0:9b334a45a8ff 188 EMU_Lock();
bogdanm 0:9b334a45a8ff 189 }
bogdanm 0:9b334a45a8ff 190 }
bogdanm 0:9b334a45a8ff 191
bogdanm 0:9b334a45a8ff 192
bogdanm 0:9b334a45a8ff 193 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 194 * @brief
bogdanm 0:9b334a45a8ff 195 * Get the cause of the last reset.
bogdanm 0:9b334a45a8ff 196 *
bogdanm 0:9b334a45a8ff 197 * @details
bogdanm 0:9b334a45a8ff 198 * In order to be useful, the reset cause must be cleared by SW before a new
bogdanm 0:9b334a45a8ff 199 * reset occurs, otherwise reset causes may accumulate. See @ref
bogdanm 0:9b334a45a8ff 200 * RMU_ResetCauseClear(). This function call will return the main cause for
bogdanm 0:9b334a45a8ff 201 * reset, which can be a bit mask (several causes), and clear away "noise".
bogdanm 0:9b334a45a8ff 202 *
bogdanm 0:9b334a45a8ff 203 * @return
bogdanm 0:9b334a45a8ff 204 * The reset cause, a bit mask of (typically, but not always, only one) of:
bogdanm 0:9b334a45a8ff 205 * @li RMU_RSTCAUSE_PORST - Power on reset
bogdanm 0:9b334a45a8ff 206 * @li RMU_RSTCAUSE_BODUNREGRST - Brown out detector, unregulated power
bogdanm 0:9b334a45a8ff 207 * @li RMU_RSTCAUSE_BODREGRST - Brown out detector, regulated power
bogdanm 0:9b334a45a8ff 208 * @li RMU_RSTCAUSE_EXTRST - External reset
bogdanm 0:9b334a45a8ff 209 * @li RMU_RSTCAUSE_WDOGRST - Watchdog reset
bogdanm 0:9b334a45a8ff 210 * @li RMU_RSTCAUSE_LOCKUPRST - Cortex-M3 lockup reset
bogdanm 0:9b334a45a8ff 211 * @li RMU_RSTCAUSE_SYSREQRST - Cortex-M3 system request reset
bogdanm 0:9b334a45a8ff 212 * @li RMU_RSTCAUSE_EM4RST - Set if the system has been in EM4
bogdanm 0:9b334a45a8ff 213 * @li RMU_RSTCAUSE_EM4WURST - Set if the system woke up on a pin from EM4
bogdanm 0:9b334a45a8ff 214 * @li RMU_RSTCAUSE_BODAVDD0 - Analog power domain 0 brown out detector reset
bogdanm 0:9b334a45a8ff 215 * @li RMU_RSTCAUSE_BODAVDD1 - Analog power domain 1 brown out detector reset
bogdanm 0:9b334a45a8ff 216 * @li RMU_RSTCAUSE_BUBODVDDDREG - Backup BOD on VDDD_REG triggered
bogdanm 0:9b334a45a8ff 217 * @li RMU_RSTCAUSE_BUBODBUVIN - Backup BOD on BU_VIN triggered
bogdanm 0:9b334a45a8ff 218 * @li RMU_RSTCAUSE_BUBODUNREG - Backup BOD on unregulated power triggered
bogdanm 0:9b334a45a8ff 219 * @li RMU_RSTCAUSE_BUBODREG - Backup BOD on regulated powered has triggered
bogdanm 0:9b334a45a8ff 220 * @li RMU_RSTCAUSE_BUMODERST - System has been in Backup mode
bogdanm 0:9b334a45a8ff 221 ******************************************************************************/
bogdanm 0:9b334a45a8ff 222 uint32_t RMU_ResetCauseGet(void)
bogdanm 0:9b334a45a8ff 223 {
bogdanm 0:9b334a45a8ff 224 #ifndef EMLIB_REGRESSION_TEST
bogdanm 0:9b334a45a8ff 225 uint32_t rstCause = RMU->RSTCAUSE;
bogdanm 0:9b334a45a8ff 226 #endif
bogdanm 0:9b334a45a8ff 227 uint32_t validRstCause = 0;
bogdanm 0:9b334a45a8ff 228 int i;
bogdanm 0:9b334a45a8ff 229
bogdanm 0:9b334a45a8ff 230 for (i=0; i<NUM_RSTCAUSES; i++)
bogdanm 0:9b334a45a8ff 231 {
bogdanm 0:9b334a45a8ff 232 //Checks to see if rstCause matches a RSTCAUSE and is not excluded by the X-mask
bogdanm 0:9b334a45a8ff 233 if ((rstCause & resetCauseMasks[i].resetCauseMask) &&
bogdanm 0:9b334a45a8ff 234 !(rstCause & resetCauseMasks[i].dontCareMask))
bogdanm 0:9b334a45a8ff 235 {
bogdanm 0:9b334a45a8ff 236 //Adds the reset-cause to list of real reset-causes
bogdanm 0:9b334a45a8ff 237 validRstCause |= resetCauseMasks[i].resetCauseMask;
bogdanm 0:9b334a45a8ff 238 }
bogdanm 0:9b334a45a8ff 239 }
bogdanm 0:9b334a45a8ff 240
bogdanm 0:9b334a45a8ff 241 return validRstCause;
bogdanm 0:9b334a45a8ff 242 }
bogdanm 0:9b334a45a8ff 243
bogdanm 0:9b334a45a8ff 244
bogdanm 0:9b334a45a8ff 245 /** @} (end addtogroup RMU) */
bogdanm 0:9b334a45a8ff 246 /** @} (end addtogroup EM_Library) */
bogdanm 0:9b334a45a8ff 247 #endif /* defined(RMU_COUNT) && (RMU_COUNT > 0) */