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_timer.c@50:a417edff4437, 2016-01-15 (annotated)

Committer:
mbed_official
Date:
Fri Jan 15 07:45:16 2016 +0000
Revision:
50:a417edff4437
Parent:
0:9b334a45a8ff
Child:
144:ef7eb2e8f9f7
Synchronized with git revision 6010f32619bfcbb01cc73747d4ff9040863482d9



Full URL: https://github.com/mbedmicro/mbed/commit/6010f32619bfcbb01cc73747d4ff9040863482d9/



Remove doubling of buffer size in realiseEndpoint()

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 2 * @file em_timer.c
bogdanm 0:9b334a45a8ff 3 * @brief Timer/counter (TIMER) Peripheral API
mbed_official 50:a417edff4437 4 * @version 4.2.1
bogdanm 0:9b334a45a8ff 5 *******************************************************************************
bogdanm 0:9b334a45a8ff 6 * @section License
mbed_official 50:a417edff4437 7 * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b>
bogdanm 0:9b334a45a8ff 8 *******************************************************************************
bogdanm 0:9b334a45a8ff 9 *
bogdanm 0:9b334a45a8ff 10 * Permission is granted to anyone to use this software for any purpose,
bogdanm 0:9b334a45a8ff 11 * including commercial applications, and to alter it and redistribute it
bogdanm 0:9b334a45a8ff 12 * freely, subject to the following restrictions:
bogdanm 0:9b334a45a8ff 13 *
bogdanm 0:9b334a45a8ff 14 * 1. The origin of this software must not be misrepresented; you must not
bogdanm 0:9b334a45a8ff 15 * claim that you wrote the original software.
bogdanm 0:9b334a45a8ff 16 * 2. Altered source versions must be plainly marked as such, and must not be
bogdanm 0:9b334a45a8ff 17 * misrepresented as being the original software.
bogdanm 0:9b334a45a8ff 18 * 3. This notice may not be removed or altered from any source distribution.
bogdanm 0:9b334a45a8ff 19 *
bogdanm 0:9b334a45a8ff 20 * DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no
bogdanm 0:9b334a45a8ff 21 * obligation to support this Software. Silicon Labs is providing the
bogdanm 0:9b334a45a8ff 22 * Software "AS IS", with no express or implied warranties of any kind,
bogdanm 0:9b334a45a8ff 23 * including, but not limited to, any implied warranties of merchantability
bogdanm 0:9b334a45a8ff 24 * or fitness for any particular purpose or warranties against infringement
bogdanm 0:9b334a45a8ff 25 * of any proprietary rights of a third party.
bogdanm 0:9b334a45a8ff 26 *
bogdanm 0:9b334a45a8ff 27 * Silicon Labs will not be liable for any consequential, incidental, or
bogdanm 0:9b334a45a8ff 28 * special damages, or any other relief, or for any claim by any third party,
bogdanm 0:9b334a45a8ff 29 * arising from your use of this Software.
bogdanm 0:9b334a45a8ff 30 *
bogdanm 0:9b334a45a8ff 31 ******************************************************************************/
bogdanm 0:9b334a45a8ff 32
bogdanm 0:9b334a45a8ff 33 #include "em_timer.h"
bogdanm 0:9b334a45a8ff 34 #if defined(TIMER_COUNT) && (TIMER_COUNT > 0)
bogdanm 0:9b334a45a8ff 35
bogdanm 0:9b334a45a8ff 36 #include "em_assert.h"
bogdanm 0:9b334a45a8ff 37
bogdanm 0:9b334a45a8ff 38 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 39 * @addtogroup EM_Library
bogdanm 0:9b334a45a8ff 40 * @{
bogdanm 0:9b334a45a8ff 41 ******************************************************************************/
bogdanm 0:9b334a45a8ff 42
bogdanm 0:9b334a45a8ff 43 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 44 * @addtogroup TIMER
bogdanm 0:9b334a45a8ff 45 * @brief Timer/Counter (TIMER) Peripheral API
bogdanm 0:9b334a45a8ff 46 * @details
bogdanm 0:9b334a45a8ff 47 * The timer module consists of three main parts:
bogdanm 0:9b334a45a8ff 48 * @li General timer config and enable control.
bogdanm 0:9b334a45a8ff 49 * @li Compare/capture control.
bogdanm 0:9b334a45a8ff 50 * @li Dead time insertion control (may not be available for all timers).
bogdanm 0:9b334a45a8ff 51 * @{
bogdanm 0:9b334a45a8ff 52 ******************************************************************************/
bogdanm 0:9b334a45a8ff 53
bogdanm 0:9b334a45a8ff 54
bogdanm 0:9b334a45a8ff 55 /*******************************************************************************
bogdanm 0:9b334a45a8ff 56 ************************** GLOBAL FUNCTIONS *******************************
bogdanm 0:9b334a45a8ff 57 ******************************************************************************/
bogdanm 0:9b334a45a8ff 58
bogdanm 0:9b334a45a8ff 59 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 60 * @brief
bogdanm 0:9b334a45a8ff 61 * Initialize TIMER.
bogdanm 0:9b334a45a8ff 62 *
bogdanm 0:9b334a45a8ff 63 * @details
bogdanm 0:9b334a45a8ff 64 * Notice that counter top must be configured separately with for instance
bogdanm 0:9b334a45a8ff 65 * TIMER_TopSet(). In addition, compare/capture and dead-time insertion
bogdanm 0:9b334a45a8ff 66 * init must be initialized separately if used. That should probably
bogdanm 0:9b334a45a8ff 67 * be done prior to the use of this function if configuring the TIMER to
bogdanm 0:9b334a45a8ff 68 * start when initialization is completed.
bogdanm 0:9b334a45a8ff 69 *
bogdanm 0:9b334a45a8ff 70 * @param[in] timer
bogdanm 0:9b334a45a8ff 71 * Pointer to TIMER peripheral register block.
bogdanm 0:9b334a45a8ff 72 *
bogdanm 0:9b334a45a8ff 73 * @param[in] init
bogdanm 0:9b334a45a8ff 74 * Pointer to TIMER initialization structure.
bogdanm 0:9b334a45a8ff 75 ******************************************************************************/
bogdanm 0:9b334a45a8ff 76 void TIMER_Init(TIMER_TypeDef *timer, const TIMER_Init_TypeDef *init)
bogdanm 0:9b334a45a8ff 77 {
bogdanm 0:9b334a45a8ff 78 EFM_ASSERT(TIMER_REF_VALID(timer));
bogdanm 0:9b334a45a8ff 79
bogdanm 0:9b334a45a8ff 80 /* Stop timer if specified to be disabled (dosn't hurt if already stopped) */
bogdanm 0:9b334a45a8ff 81 if (!(init->enable))
bogdanm 0:9b334a45a8ff 82 {
bogdanm 0:9b334a45a8ff 83 timer->CMD = TIMER_CMD_STOP;
bogdanm 0:9b334a45a8ff 84 }
bogdanm 0:9b334a45a8ff 85
bogdanm 0:9b334a45a8ff 86 /* Reset counter */
bogdanm 0:9b334a45a8ff 87 timer->CNT = _TIMER_CNT_RESETVALUE;
bogdanm 0:9b334a45a8ff 88
mbed_official 50:a417edff4437 89 timer->CTRL = ((uint32_t)(init->prescale) << _TIMER_CTRL_PRESC_SHIFT)
mbed_official 50:a417edff4437 90 | ((uint32_t)(init->clkSel) << _TIMER_CTRL_CLKSEL_SHIFT)
mbed_official 50:a417edff4437 91 | ((uint32_t)(init->fallAction) << _TIMER_CTRL_FALLA_SHIFT)
mbed_official 50:a417edff4437 92 | ((uint32_t)(init->riseAction) << _TIMER_CTRL_RISEA_SHIFT)
mbed_official 50:a417edff4437 93 | ((uint32_t)(init->mode) << _TIMER_CTRL_MODE_SHIFT)
mbed_official 50:a417edff4437 94 | (init->debugRun ? TIMER_CTRL_DEBUGRUN : 0)
mbed_official 50:a417edff4437 95 | (init->dmaClrAct ? TIMER_CTRL_DMACLRACT : 0)
mbed_official 50:a417edff4437 96 | (init->quadModeX4 ? TIMER_CTRL_QDM_X4 : 0)
mbed_official 50:a417edff4437 97 | (init->oneShot ? TIMER_CTRL_OSMEN : 0)
bogdanm 0:9b334a45a8ff 98
mbed_official 50:a417edff4437 99 #if defined(TIMER_CTRL_X2CNT) && defined(TIMER_CTRL_ATI)
mbed_official 50:a417edff4437 100 | (init->count2x ? TIMER_CTRL_X2CNT : 0)
mbed_official 50:a417edff4437 101 | (init->ati ? TIMER_CTRL_ATI : 0)
bogdanm 0:9b334a45a8ff 102 #endif
mbed_official 50:a417edff4437 103 | (init->sync ? TIMER_CTRL_SYNC : 0);
bogdanm 0:9b334a45a8ff 104
bogdanm 0:9b334a45a8ff 105 /* Start timer if specified to be enabled (dosn't hurt if already started) */
bogdanm 0:9b334a45a8ff 106 if (init->enable)
bogdanm 0:9b334a45a8ff 107 {
bogdanm 0:9b334a45a8ff 108 timer->CMD = TIMER_CMD_START;
bogdanm 0:9b334a45a8ff 109 }
bogdanm 0:9b334a45a8ff 110 }
bogdanm 0:9b334a45a8ff 111
bogdanm 0:9b334a45a8ff 112
bogdanm 0:9b334a45a8ff 113 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 114 * @brief
bogdanm 0:9b334a45a8ff 115 * Initialize TIMER compare/capture channel.
bogdanm 0:9b334a45a8ff 116 *
bogdanm 0:9b334a45a8ff 117 * @details
bogdanm 0:9b334a45a8ff 118 * Notice that if operating channel in compare mode, the CCV and CCVB register
bogdanm 0:9b334a45a8ff 119 * must be set separately as required.
bogdanm 0:9b334a45a8ff 120 *
bogdanm 0:9b334a45a8ff 121 * @param[in] timer
bogdanm 0:9b334a45a8ff 122 * Pointer to TIMER peripheral register block.
bogdanm 0:9b334a45a8ff 123 *
bogdanm 0:9b334a45a8ff 124 * @param[in] ch
bogdanm 0:9b334a45a8ff 125 * Compare/capture channel to init for.
bogdanm 0:9b334a45a8ff 126 *
bogdanm 0:9b334a45a8ff 127 * @param[in] init
bogdanm 0:9b334a45a8ff 128 * Pointer to TIMER initialization structure.
bogdanm 0:9b334a45a8ff 129 ******************************************************************************/
bogdanm 0:9b334a45a8ff 130 void TIMER_InitCC(TIMER_TypeDef *timer,
bogdanm 0:9b334a45a8ff 131 unsigned int ch,
bogdanm 0:9b334a45a8ff 132 const TIMER_InitCC_TypeDef *init)
bogdanm 0:9b334a45a8ff 133 {
bogdanm 0:9b334a45a8ff 134 EFM_ASSERT(TIMER_REF_VALID(timer));
bogdanm 0:9b334a45a8ff 135 EFM_ASSERT(TIMER_CH_VALID(ch));
bogdanm 0:9b334a45a8ff 136
bogdanm 0:9b334a45a8ff 137 timer->CC[ch].CTRL =
mbed_official 50:a417edff4437 138 ((uint32_t)(init->eventCtrl) << _TIMER_CC_CTRL_ICEVCTRL_SHIFT)
mbed_official 50:a417edff4437 139 | ((uint32_t)(init->edge) << _TIMER_CC_CTRL_ICEDGE_SHIFT)
mbed_official 50:a417edff4437 140 | ((uint32_t)(init->prsSel) << _TIMER_CC_CTRL_PRSSEL_SHIFT)
mbed_official 50:a417edff4437 141 | ((uint32_t)(init->cufoa) << _TIMER_CC_CTRL_CUFOA_SHIFT)
mbed_official 50:a417edff4437 142 | ((uint32_t)(init->cofoa) << _TIMER_CC_CTRL_COFOA_SHIFT)
mbed_official 50:a417edff4437 143 | ((uint32_t)(init->cmoa) << _TIMER_CC_CTRL_CMOA_SHIFT)
mbed_official 50:a417edff4437 144 | ((uint32_t)(init->mode) << _TIMER_CC_CTRL_MODE_SHIFT)
mbed_official 50:a417edff4437 145 | (init->filter ? TIMER_CC_CTRL_FILT_ENABLE : 0)
mbed_official 50:a417edff4437 146 | (init->prsInput ? TIMER_CC_CTRL_INSEL_PRS : 0)
mbed_official 50:a417edff4437 147 | (init->coist ? TIMER_CC_CTRL_COIST : 0)
mbed_official 50:a417edff4437 148 | (init->outInvert ? TIMER_CC_CTRL_OUTINV : 0);
bogdanm 0:9b334a45a8ff 149 }
bogdanm 0:9b334a45a8ff 150
bogdanm 0:9b334a45a8ff 151
mbed_official 50:a417edff4437 152 #if defined(_TIMER_DTCTRL_MASK)
bogdanm 0:9b334a45a8ff 153 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 154 * @brief
bogdanm 0:9b334a45a8ff 155 * Initialize the TIMER DTI unit.
bogdanm 0:9b334a45a8ff 156 *
bogdanm 0:9b334a45a8ff 157 * @param[in] timer
bogdanm 0:9b334a45a8ff 158 * Pointer to TIMER peripheral register block.
bogdanm 0:9b334a45a8ff 159 *
bogdanm 0:9b334a45a8ff 160 * @param[in] init
bogdanm 0:9b334a45a8ff 161 * Pointer to TIMER DTI initialization structure.
bogdanm 0:9b334a45a8ff 162 ******************************************************************************/
bogdanm 0:9b334a45a8ff 163 void TIMER_InitDTI(TIMER_TypeDef *timer, const TIMER_InitDTI_TypeDef *init)
bogdanm 0:9b334a45a8ff 164 {
bogdanm 0:9b334a45a8ff 165 EFM_ASSERT(TIMER0 == timer);
bogdanm 0:9b334a45a8ff 166
bogdanm 0:9b334a45a8ff 167 /* Make sure the DTI unit is disabled while initializing. */
bogdanm 0:9b334a45a8ff 168 TIMER_EnableDTI (timer, false);
bogdanm 0:9b334a45a8ff 169
bogdanm 0:9b334a45a8ff 170 /* Setup the DTCTRL register.
bogdanm 0:9b334a45a8ff 171 The enable bit will be set at the end of the function if specified. */
bogdanm 0:9b334a45a8ff 172 timer->DTCTRL =
mbed_official 50:a417edff4437 173 (init->autoRestart ? TIMER_DTCTRL_DTDAS : 0)
mbed_official 50:a417edff4437 174 | (init->activeLowOut ? TIMER_DTCTRL_DTIPOL : 0)
mbed_official 50:a417edff4437 175 | (init->invertComplementaryOut ? TIMER_DTCTRL_DTCINV : 0)
mbed_official 50:a417edff4437 176 | (init->enablePrsSource ? TIMER_DTCTRL_DTPRSEN : 0)
mbed_official 50:a417edff4437 177 | ((uint32_t)(init->prsSel) << _TIMER_DTCTRL_DTPRSSEL_SHIFT);
bogdanm 0:9b334a45a8ff 178
bogdanm 0:9b334a45a8ff 179 /* Setup the DTTIME register. */
bogdanm 0:9b334a45a8ff 180 timer->DTTIME =
mbed_official 50:a417edff4437 181 ((uint32_t)(init->prescale) << _TIMER_DTTIME_DTPRESC_SHIFT)
mbed_official 50:a417edff4437 182 | ((uint32_t)(init->riseTime) << _TIMER_DTTIME_DTRISET_SHIFT)
mbed_official 50:a417edff4437 183 | ((uint32_t)(init->fallTime) << _TIMER_DTTIME_DTFALLT_SHIFT);
bogdanm 0:9b334a45a8ff 184
bogdanm 0:9b334a45a8ff 185 /* Setup the DTFC register. */
bogdanm 0:9b334a45a8ff 186 timer->DTFC =
mbed_official 50:a417edff4437 187 (init->enableFaultSourceCoreLockup ? TIMER_DTFC_DTLOCKUPFEN : 0)
mbed_official 50:a417edff4437 188 | (init->enableFaultSourceDebugger ? TIMER_DTFC_DTDBGFEN : 0)
mbed_official 50:a417edff4437 189 | (init->enableFaultSourcePrsSel0 ? TIMER_DTFC_DTPRS0FEN : 0)
mbed_official 50:a417edff4437 190 | (init->enableFaultSourcePrsSel1 ? TIMER_DTFC_DTPRS1FEN : 0)
mbed_official 50:a417edff4437 191 | ((uint32_t)(init->faultAction) << _TIMER_DTFC_DTFA_SHIFT)
mbed_official 50:a417edff4437 192 | ((uint32_t)(init->faultSourcePrsSel0) << _TIMER_DTFC_DTPRS0FSEL_SHIFT)
mbed_official 50:a417edff4437 193 | ((uint32_t)(init->faultSourcePrsSel1) << _TIMER_DTFC_DTPRS1FSEL_SHIFT);
bogdanm 0:9b334a45a8ff 194
bogdanm 0:9b334a45a8ff 195 /* Setup the DTOGEN register. */
bogdanm 0:9b334a45a8ff 196 timer->DTOGEN = init->outputsEnableMask;
bogdanm 0:9b334a45a8ff 197
bogdanm 0:9b334a45a8ff 198 /* Clear any previous DTI faults. */
bogdanm 0:9b334a45a8ff 199 TIMER_ClearDTIFault(timer, TIMER_GetDTIFault(timer));
bogdanm 0:9b334a45a8ff 200
bogdanm 0:9b334a45a8ff 201 /* Enable/disable before returning. */
bogdanm 0:9b334a45a8ff 202 TIMER_EnableDTI (timer, init->enable);
bogdanm 0:9b334a45a8ff 203 }
bogdanm 0:9b334a45a8ff 204 #endif
bogdanm 0:9b334a45a8ff 205
bogdanm 0:9b334a45a8ff 206
bogdanm 0:9b334a45a8ff 207 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 208 * @brief
bogdanm 0:9b334a45a8ff 209 * Reset TIMER to same state as after a HW reset.
bogdanm 0:9b334a45a8ff 210 *
bogdanm 0:9b334a45a8ff 211 * @note
bogdanm 0:9b334a45a8ff 212 * The ROUTE register is NOT reset by this function, in order to allow for
bogdanm 0:9b334a45a8ff 213 * centralized setup of this feature.
bogdanm 0:9b334a45a8ff 214 *
bogdanm 0:9b334a45a8ff 215 * @param[in] timer
bogdanm 0:9b334a45a8ff 216 * Pointer to TIMER peripheral register block.
bogdanm 0:9b334a45a8ff 217 ******************************************************************************/
bogdanm 0:9b334a45a8ff 218 void TIMER_Reset(TIMER_TypeDef *timer)
bogdanm 0:9b334a45a8ff 219 {
bogdanm 0:9b334a45a8ff 220 int i;
bogdanm 0:9b334a45a8ff 221
bogdanm 0:9b334a45a8ff 222 EFM_ASSERT(TIMER_REF_VALID(timer));
bogdanm 0:9b334a45a8ff 223
bogdanm 0:9b334a45a8ff 224 /* Make sure disabled first, before resetting other registers */
bogdanm 0:9b334a45a8ff 225 timer->CMD = TIMER_CMD_STOP;
bogdanm 0:9b334a45a8ff 226
bogdanm 0:9b334a45a8ff 227 timer->CTRL = _TIMER_CTRL_RESETVALUE;
bogdanm 0:9b334a45a8ff 228 timer->IEN = _TIMER_IEN_RESETVALUE;
bogdanm 0:9b334a45a8ff 229 timer->IFC = _TIMER_IFC_MASK;
bogdanm 0:9b334a45a8ff 230 timer->TOP = _TIMER_TOP_RESETVALUE;
bogdanm 0:9b334a45a8ff 231 timer->TOPB = _TIMER_TOPB_RESETVALUE;
bogdanm 0:9b334a45a8ff 232 timer->CNT = _TIMER_CNT_RESETVALUE;
bogdanm 0:9b334a45a8ff 233 /* Do not reset route register, setting should be done independently */
bogdanm 0:9b334a45a8ff 234 /* (Note: ROUTE register may be locked by DTLOCK register.) */
bogdanm 0:9b334a45a8ff 235
bogdanm 0:9b334a45a8ff 236 for (i = 0; TIMER_CH_VALID(i); i++)
bogdanm 0:9b334a45a8ff 237 {
bogdanm 0:9b334a45a8ff 238 timer->CC[i].CTRL = _TIMER_CC_CTRL_RESETVALUE;
bogdanm 0:9b334a45a8ff 239 timer->CC[i].CCV = _TIMER_CC_CCV_RESETVALUE;
bogdanm 0:9b334a45a8ff 240 timer->CC[i].CCVB = _TIMER_CC_CCVB_RESETVALUE;
bogdanm 0:9b334a45a8ff 241 }
bogdanm 0:9b334a45a8ff 242
bogdanm 0:9b334a45a8ff 243 /* Reset dead time insertion module, no effect on timers without DTI */
bogdanm 0:9b334a45a8ff 244
mbed_official 50:a417edff4437 245 #if defined(TIMER_DTLOCK_LOCKKEY_UNLOCK)
bogdanm 0:9b334a45a8ff 246 /* Unlock DTI registers first in case locked */
bogdanm 0:9b334a45a8ff 247 timer->DTLOCK = TIMER_DTLOCK_LOCKKEY_UNLOCK;
bogdanm 0:9b334a45a8ff 248
bogdanm 0:9b334a45a8ff 249 timer->DTCTRL = _TIMER_DTCTRL_RESETVALUE;
bogdanm 0:9b334a45a8ff 250 timer->DTTIME = _TIMER_DTTIME_RESETVALUE;
bogdanm 0:9b334a45a8ff 251 timer->DTFC = _TIMER_DTFC_RESETVALUE;
bogdanm 0:9b334a45a8ff 252 timer->DTOGEN = _TIMER_DTOGEN_RESETVALUE;
bogdanm 0:9b334a45a8ff 253 timer->DTFAULTC = _TIMER_DTFAULTC_MASK;
bogdanm 0:9b334a45a8ff 254 #endif
bogdanm 0:9b334a45a8ff 255 }
bogdanm 0:9b334a45a8ff 256
bogdanm 0:9b334a45a8ff 257
bogdanm 0:9b334a45a8ff 258 /** @} (end addtogroup TIMER) */
bogdanm 0:9b334a45a8ff 259 /** @} (end addtogroup EM_Library) */
bogdanm 0:9b334a45a8ff 260 #endif /* defined(TIMER_COUNT) && (TIMER_COUNT > 0) */