added prescaler for 16 bit pwm in LPC1347 target
Fork of mbed-dev by
targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/emlib/src/em_acmp.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?
User | Revision | Line number | New contents of line |
---|---|---|---|
bogdanm | 0:9b334a45a8ff | 1 | /***************************************************************************//** |
bogdanm | 0:9b334a45a8ff | 2 | * @file em_acmp.c |
bogdanm | 0:9b334a45a8ff | 3 | * @brief Analog Comparator (ACMP) Peripheral API |
bogdanm | 0:9b334a45a8ff | 4 | * @version 3.20.12 |
bogdanm | 0:9b334a45a8ff | 5 | ******************************************************************************* |
bogdanm | 0:9b334a45a8ff | 6 | * @section License |
bogdanm | 0:9b334a45a8ff | 7 | * <b>(C) Copyright 2014 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 | |
bogdanm | 0:9b334a45a8ff | 34 | #include "em_acmp.h" |
bogdanm | 0:9b334a45a8ff | 35 | #if defined(ACMP_COUNT) && (ACMP_COUNT > 0) |
bogdanm | 0:9b334a45a8ff | 36 | |
bogdanm | 0:9b334a45a8ff | 37 | #include <stdbool.h> |
bogdanm | 0:9b334a45a8ff | 38 | #include "em_bitband.h" |
bogdanm | 0:9b334a45a8ff | 39 | #include "em_assert.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 ACMP |
bogdanm | 0:9b334a45a8ff | 48 | * @brief Analog comparator (ACMP) 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 | |
bogdanm | 0:9b334a45a8ff | 59 | /** Validation of ACMP register block pointer reference |
bogdanm | 0:9b334a45a8ff | 60 | * for assert statements. */ |
bogdanm | 0:9b334a45a8ff | 61 | #if (ACMP_COUNT == 1) |
bogdanm | 0:9b334a45a8ff | 62 | #define ACMP_REF_VALID(ref) ((ref) == ACMP0) |
bogdanm | 0:9b334a45a8ff | 63 | #elif (ACMP_COUNT == 2) |
bogdanm | 0:9b334a45a8ff | 64 | #define ACMP_REF_VALID(ref) (((ref) == ACMP0) || ((ref) == ACMP1)) |
bogdanm | 0:9b334a45a8ff | 65 | #else |
bogdanm | 0:9b334a45a8ff | 66 | #error Undefined number of analog comparators (ACMP). |
bogdanm | 0:9b334a45a8ff | 67 | #endif |
bogdanm | 0:9b334a45a8ff | 68 | |
bogdanm | 0:9b334a45a8ff | 69 | /** @endcond */ |
bogdanm | 0:9b334a45a8ff | 70 | |
bogdanm | 0:9b334a45a8ff | 71 | /******************************************************************************* |
bogdanm | 0:9b334a45a8ff | 72 | ************************** GLOBAL FUNCTIONS ******************************* |
bogdanm | 0:9b334a45a8ff | 73 | ******************************************************************************/ |
bogdanm | 0:9b334a45a8ff | 74 | |
bogdanm | 0:9b334a45a8ff | 75 | /***************************************************************************//** |
bogdanm | 0:9b334a45a8ff | 76 | * @brief |
bogdanm | 0:9b334a45a8ff | 77 | * Sets up the ACMP for use in capacative sense applications. |
bogdanm | 0:9b334a45a8ff | 78 | * |
bogdanm | 0:9b334a45a8ff | 79 | * @details |
bogdanm | 0:9b334a45a8ff | 80 | * This function sets up the ACMP for use in capacacitve sense applications. |
bogdanm | 0:9b334a45a8ff | 81 | * To use the capacative sense functionality in the ACMP you need to use |
bogdanm | 0:9b334a45a8ff | 82 | * the PRS output of the ACMP module to count the number of oscillations |
bogdanm | 0:9b334a45a8ff | 83 | * in the capacative sense circuit (possibly using a TIMER). |
bogdanm | 0:9b334a45a8ff | 84 | * |
bogdanm | 0:9b334a45a8ff | 85 | * @note |
bogdanm | 0:9b334a45a8ff | 86 | * A basic example of capacative sensing can be found in the STK BSP |
bogdanm | 0:9b334a45a8ff | 87 | * (capsense demo). |
bogdanm | 0:9b334a45a8ff | 88 | * |
bogdanm | 0:9b334a45a8ff | 89 | * @param[in] acmp |
bogdanm | 0:9b334a45a8ff | 90 | * Pointer to ACMP peripheral register block. |
bogdanm | 0:9b334a45a8ff | 91 | * |
bogdanm | 0:9b334a45a8ff | 92 | * @param[in] init |
bogdanm | 0:9b334a45a8ff | 93 | * Pointer to initialization structure used to configure ACMP for capacative |
bogdanm | 0:9b334a45a8ff | 94 | * sensing operation. |
bogdanm | 0:9b334a45a8ff | 95 | ******************************************************************************/ |
bogdanm | 0:9b334a45a8ff | 96 | void ACMP_CapsenseInit(ACMP_TypeDef *acmp, const ACMP_CapsenseInit_TypeDef *init) |
bogdanm | 0:9b334a45a8ff | 97 | { |
bogdanm | 0:9b334a45a8ff | 98 | /* Make sure the module exists on the selected chip */ |
bogdanm | 0:9b334a45a8ff | 99 | EFM_ASSERT(ACMP_REF_VALID(acmp)); |
bogdanm | 0:9b334a45a8ff | 100 | |
bogdanm | 0:9b334a45a8ff | 101 | /* Make sure that vddLevel is within bounds */ |
bogdanm | 0:9b334a45a8ff | 102 | EFM_ASSERT(init->vddLevel < 64); |
bogdanm | 0:9b334a45a8ff | 103 | |
bogdanm | 0:9b334a45a8ff | 104 | /* Make sure biasprog is within bounds */ |
bogdanm | 0:9b334a45a8ff | 105 | EFM_ASSERT(init->biasProg < 16); |
bogdanm | 0:9b334a45a8ff | 106 | |
bogdanm | 0:9b334a45a8ff | 107 | /* Set control register. No need to set interrupt modes */ |
bogdanm | 0:9b334a45a8ff | 108 | acmp->CTRL = (init->fullBias << _ACMP_CTRL_FULLBIAS_SHIFT) |
bogdanm | 0:9b334a45a8ff | 109 | | (init->halfBias << _ACMP_CTRL_HALFBIAS_SHIFT) |
bogdanm | 0:9b334a45a8ff | 110 | | (init->biasProg << _ACMP_CTRL_BIASPROG_SHIFT) |
bogdanm | 0:9b334a45a8ff | 111 | | (init->warmTime << _ACMP_CTRL_WARMTIME_SHIFT) |
bogdanm | 0:9b334a45a8ff | 112 | | (init->hysteresisLevel << _ACMP_CTRL_HYSTSEL_SHIFT); |
bogdanm | 0:9b334a45a8ff | 113 | |
bogdanm | 0:9b334a45a8ff | 114 | /* Select capacative sensing mode by selecting a resistor and enabling it */ |
bogdanm | 0:9b334a45a8ff | 115 | acmp->INPUTSEL = (init->resistor << _ACMP_INPUTSEL_CSRESSEL_SHIFT) |
bogdanm | 0:9b334a45a8ff | 116 | | ACMP_INPUTSEL_CSRESEN |
bogdanm | 0:9b334a45a8ff | 117 | | (init->lowPowerReferenceEnabled << _ACMP_INPUTSEL_LPREF_SHIFT) |
bogdanm | 0:9b334a45a8ff | 118 | | (init->vddLevel << _ACMP_INPUTSEL_VDDLEVEL_SHIFT) |
bogdanm | 0:9b334a45a8ff | 119 | | ACMP_INPUTSEL_NEGSEL_CAPSENSE; |
bogdanm | 0:9b334a45a8ff | 120 | |
bogdanm | 0:9b334a45a8ff | 121 | /* Enable ACMP if requested. |
bogdanm | 0:9b334a45a8ff | 122 | * Note: BITBAND_Peripheral() function is used for setting/clearing single |
bogdanm | 0:9b334a45a8ff | 123 | * bit peripheral register bitfields. */ |
bogdanm | 0:9b334a45a8ff | 124 | BITBAND_Peripheral(&(acmp->CTRL), |
bogdanm | 0:9b334a45a8ff | 125 | (uint32_t)_ACMP_CTRL_EN_SHIFT, |
bogdanm | 0:9b334a45a8ff | 126 | (uint32_t)init->enable); |
bogdanm | 0:9b334a45a8ff | 127 | } |
bogdanm | 0:9b334a45a8ff | 128 | |
bogdanm | 0:9b334a45a8ff | 129 | /***************************************************************************//** |
bogdanm | 0:9b334a45a8ff | 130 | * @brief |
bogdanm | 0:9b334a45a8ff | 131 | * Sets the ACMP channel used for capacative sensing. |
bogdanm | 0:9b334a45a8ff | 132 | * |
bogdanm | 0:9b334a45a8ff | 133 | * @note |
bogdanm | 0:9b334a45a8ff | 134 | * A basic example of capacative sensing can be found in the STK BSP |
bogdanm | 0:9b334a45a8ff | 135 | * (capsense demo). |
bogdanm | 0:9b334a45a8ff | 136 | * |
bogdanm | 0:9b334a45a8ff | 137 | * @param[in] acmp |
bogdanm | 0:9b334a45a8ff | 138 | * Pointer to ACMP peripheral register block. |
bogdanm | 0:9b334a45a8ff | 139 | * |
bogdanm | 0:9b334a45a8ff | 140 | * @param[in] channel |
bogdanm | 0:9b334a45a8ff | 141 | * The ACMP channel to use for capacative sensing (Possel). |
bogdanm | 0:9b334a45a8ff | 142 | ******************************************************************************/ |
bogdanm | 0:9b334a45a8ff | 143 | void ACMP_CapsenseChannelSet(ACMP_TypeDef *acmp, ACMP_Channel_TypeDef channel) |
bogdanm | 0:9b334a45a8ff | 144 | { |
bogdanm | 0:9b334a45a8ff | 145 | /* Make sure that only external channels are used */ |
bogdanm | 0:9b334a45a8ff | 146 | EFM_ASSERT(channel <= _ACMP_INPUTSEL_POSSEL_CH7); |
bogdanm | 0:9b334a45a8ff | 147 | |
bogdanm | 0:9b334a45a8ff | 148 | /* Set channel as positive channel in ACMP */ |
bogdanm | 0:9b334a45a8ff | 149 | SET_BIT_FIELD(acmp->INPUTSEL, _ACMP_INPUTSEL_POSSEL_MASK, channel, |
bogdanm | 0:9b334a45a8ff | 150 | _ACMP_INPUTSEL_POSSEL_SHIFT); |
bogdanm | 0:9b334a45a8ff | 151 | } |
bogdanm | 0:9b334a45a8ff | 152 | |
bogdanm | 0:9b334a45a8ff | 153 | /***************************************************************************//** |
bogdanm | 0:9b334a45a8ff | 154 | * @brief |
bogdanm | 0:9b334a45a8ff | 155 | * Disables the ACMP. |
bogdanm | 0:9b334a45a8ff | 156 | * |
bogdanm | 0:9b334a45a8ff | 157 | * @param[in] acmp |
bogdanm | 0:9b334a45a8ff | 158 | * Pointer to ACMP peripheral register block. |
bogdanm | 0:9b334a45a8ff | 159 | ******************************************************************************/ |
bogdanm | 0:9b334a45a8ff | 160 | void ACMP_Disable(ACMP_TypeDef *acmp) |
bogdanm | 0:9b334a45a8ff | 161 | { |
bogdanm | 0:9b334a45a8ff | 162 | acmp->CTRL &= ~ACMP_CTRL_EN; |
bogdanm | 0:9b334a45a8ff | 163 | } |
bogdanm | 0:9b334a45a8ff | 164 | |
bogdanm | 0:9b334a45a8ff | 165 | /***************************************************************************//** |
bogdanm | 0:9b334a45a8ff | 166 | * @brief |
bogdanm | 0:9b334a45a8ff | 167 | * Enables the ACMP. |
bogdanm | 0:9b334a45a8ff | 168 | * |
bogdanm | 0:9b334a45a8ff | 169 | * @param[in] acmp |
bogdanm | 0:9b334a45a8ff | 170 | * Pointer to ACMP peripheral register block. |
bogdanm | 0:9b334a45a8ff | 171 | ******************************************************************************/ |
bogdanm | 0:9b334a45a8ff | 172 | void ACMP_Enable(ACMP_TypeDef *acmp) |
bogdanm | 0:9b334a45a8ff | 173 | { |
bogdanm | 0:9b334a45a8ff | 174 | acmp->CTRL |= ACMP_CTRL_EN; |
bogdanm | 0:9b334a45a8ff | 175 | } |
bogdanm | 0:9b334a45a8ff | 176 | |
bogdanm | 0:9b334a45a8ff | 177 | /***************************************************************************//** |
bogdanm | 0:9b334a45a8ff | 178 | * @brief |
bogdanm | 0:9b334a45a8ff | 179 | * Reset ACMP to same state as after a HW reset. |
bogdanm | 0:9b334a45a8ff | 180 | * |
bogdanm | 0:9b334a45a8ff | 181 | * @note |
bogdanm | 0:9b334a45a8ff | 182 | * The ROUTE register is NOT reset by this function, in order to allow for |
bogdanm | 0:9b334a45a8ff | 183 | * centralized setup of this feature. |
bogdanm | 0:9b334a45a8ff | 184 | * |
bogdanm | 0:9b334a45a8ff | 185 | * @param[in] acmp |
bogdanm | 0:9b334a45a8ff | 186 | * Pointer to the ACMP peripheral register block. |
bogdanm | 0:9b334a45a8ff | 187 | ******************************************************************************/ |
bogdanm | 0:9b334a45a8ff | 188 | void ACMP_Reset(ACMP_TypeDef *acmp) |
bogdanm | 0:9b334a45a8ff | 189 | { |
bogdanm | 0:9b334a45a8ff | 190 | /* Make sure the module exists on the selected chip */ |
bogdanm | 0:9b334a45a8ff | 191 | EFM_ASSERT(ACMP_REF_VALID(acmp)); |
bogdanm | 0:9b334a45a8ff | 192 | |
bogdanm | 0:9b334a45a8ff | 193 | acmp->CTRL = _ACMP_CTRL_RESETVALUE; |
bogdanm | 0:9b334a45a8ff | 194 | acmp->INPUTSEL = _ACMP_INPUTSEL_RESETVALUE; |
bogdanm | 0:9b334a45a8ff | 195 | acmp->IEN = _ACMP_IEN_RESETVALUE; |
bogdanm | 0:9b334a45a8ff | 196 | acmp->IFC = _ACMP_IF_MASK; |
bogdanm | 0:9b334a45a8ff | 197 | } |
bogdanm | 0:9b334a45a8ff | 198 | |
bogdanm | 0:9b334a45a8ff | 199 | /***************************************************************************//** |
bogdanm | 0:9b334a45a8ff | 200 | * @brief |
bogdanm | 0:9b334a45a8ff | 201 | * Sets up GPIO output from the ACMP. |
bogdanm | 0:9b334a45a8ff | 202 | * |
bogdanm | 0:9b334a45a8ff | 203 | * @note |
bogdanm | 0:9b334a45a8ff | 204 | * GPIO must be enabled in the CMU before this function call, i.e. |
bogdanm | 0:9b334a45a8ff | 205 | * @verbatim CMU_ClockEnable(cmuClock_GPIO, true); @endverbatim |
bogdanm | 0:9b334a45a8ff | 206 | * |
bogdanm | 0:9b334a45a8ff | 207 | * @param[in] acmp |
bogdanm | 0:9b334a45a8ff | 208 | * Pointer to the ACMP peripheral register block. |
bogdanm | 0:9b334a45a8ff | 209 | * |
bogdanm | 0:9b334a45a8ff | 210 | * @param location |
bogdanm | 0:9b334a45a8ff | 211 | * The pin location to use. See the datasheet for location to pin mappings. |
bogdanm | 0:9b334a45a8ff | 212 | * |
bogdanm | 0:9b334a45a8ff | 213 | * @param enable |
bogdanm | 0:9b334a45a8ff | 214 | * Enable or disable pin output. |
bogdanm | 0:9b334a45a8ff | 215 | * |
bogdanm | 0:9b334a45a8ff | 216 | * @param invert |
bogdanm | 0:9b334a45a8ff | 217 | * Invert output. |
bogdanm | 0:9b334a45a8ff | 218 | ******************************************************************************/ |
bogdanm | 0:9b334a45a8ff | 219 | void ACMP_GPIOSetup(ACMP_TypeDef *acmp, uint32_t location, bool enable, bool invert) |
bogdanm | 0:9b334a45a8ff | 220 | { |
bogdanm | 0:9b334a45a8ff | 221 | /* Sanity checking of location */ |
bogdanm | 0:9b334a45a8ff | 222 | #if defined( _ACMP_ROUTE_LOCATION_LOC3 ) |
bogdanm | 0:9b334a45a8ff | 223 | EFM_ASSERT(location <= _ACMP_ROUTE_LOCATION_LOC3); |
bogdanm | 0:9b334a45a8ff | 224 | |
bogdanm | 0:9b334a45a8ff | 225 | #elif defined( _ACMP_ROUTE_LOCATION_LOC2 ) |
bogdanm | 0:9b334a45a8ff | 226 | EFM_ASSERT(location <= _ACMP_ROUTE_LOCATION_LOC2); |
bogdanm | 0:9b334a45a8ff | 227 | |
bogdanm | 0:9b334a45a8ff | 228 | #elif defined( _ACMP_ROUTE_LOCATION_LOC1 ) |
bogdanm | 0:9b334a45a8ff | 229 | EFM_ASSERT(location <= _ACMP_ROUTE_LOCATION_LOC1); |
bogdanm | 0:9b334a45a8ff | 230 | |
bogdanm | 0:9b334a45a8ff | 231 | #else |
bogdanm | 0:9b334a45a8ff | 232 | #error Illegal pin location (ACMP). |
bogdanm | 0:9b334a45a8ff | 233 | #endif |
bogdanm | 0:9b334a45a8ff | 234 | |
bogdanm | 0:9b334a45a8ff | 235 | |
bogdanm | 0:9b334a45a8ff | 236 | /* Set GPIO inversion */ |
bogdanm | 0:9b334a45a8ff | 237 | SET_BIT_FIELD(acmp->CTRL, _ACMP_CTRL_GPIOINV_MASK, invert, |
bogdanm | 0:9b334a45a8ff | 238 | _ACMP_CTRL_GPIOINV_SHIFT); |
bogdanm | 0:9b334a45a8ff | 239 | |
bogdanm | 0:9b334a45a8ff | 240 | acmp->ROUTE = (location << _ACMP_ROUTE_LOCATION_SHIFT) |
bogdanm | 0:9b334a45a8ff | 241 | | (enable << _ACMP_ROUTE_ACMPPEN_SHIFT); |
bogdanm | 0:9b334a45a8ff | 242 | } |
bogdanm | 0:9b334a45a8ff | 243 | |
bogdanm | 0:9b334a45a8ff | 244 | /***************************************************************************//** |
bogdanm | 0:9b334a45a8ff | 245 | * @brief |
bogdanm | 0:9b334a45a8ff | 246 | * Sets which channels should be used in ACMP comparisons. |
bogdanm | 0:9b334a45a8ff | 247 | * |
bogdanm | 0:9b334a45a8ff | 248 | * @param[in] acmp |
bogdanm | 0:9b334a45a8ff | 249 | * Pointer to the ACMP peripheral register block. |
bogdanm | 0:9b334a45a8ff | 250 | * |
bogdanm | 0:9b334a45a8ff | 251 | * @param negSel |
bogdanm | 0:9b334a45a8ff | 252 | * Channel to use on the negative input to the ACMP. |
bogdanm | 0:9b334a45a8ff | 253 | * |
bogdanm | 0:9b334a45a8ff | 254 | * @param posSel |
bogdanm | 0:9b334a45a8ff | 255 | * Channel to use on the positive input to the ACMP. |
bogdanm | 0:9b334a45a8ff | 256 | ******************************************************************************/ |
bogdanm | 0:9b334a45a8ff | 257 | void ACMP_ChannelSet(ACMP_TypeDef *acmp, ACMP_Channel_TypeDef negSel, |
bogdanm | 0:9b334a45a8ff | 258 | ACMP_Channel_TypeDef posSel) |
bogdanm | 0:9b334a45a8ff | 259 | { |
bogdanm | 0:9b334a45a8ff | 260 | /* Sanity checking of ACMP inputs */ |
bogdanm | 0:9b334a45a8ff | 261 | EFM_ASSERT(posSel <= _ACMP_INPUTSEL_POSSEL_CH7); |
bogdanm | 0:9b334a45a8ff | 262 | |
bogdanm | 0:9b334a45a8ff | 263 | #if defined(_ACMP_INPUTSEL_NEGSEL_DAC0CH1) |
bogdanm | 0:9b334a45a8ff | 264 | EFM_ASSERT(negSel <= _ACMP_INPUTSEL_NEGSEL_DAC0CH1); |
bogdanm | 0:9b334a45a8ff | 265 | #elif defined(_ACMP_INPUTSEL_NEGSEL_CAPSENSE) |
bogdanm | 0:9b334a45a8ff | 266 | EFM_ASSERT(negSel <= _ACMP_INPUTSEL_NEGSEL_CAPSENSE); |
bogdanm | 0:9b334a45a8ff | 267 | #else |
bogdanm | 0:9b334a45a8ff | 268 | #error Illegal negative input selection (ACMP). |
bogdanm | 0:9b334a45a8ff | 269 | #endif |
bogdanm | 0:9b334a45a8ff | 270 | |
bogdanm | 0:9b334a45a8ff | 271 | acmp->INPUTSEL = (acmp->INPUTSEL & ~(_ACMP_INPUTSEL_POSSEL_MASK | |
bogdanm | 0:9b334a45a8ff | 272 | _ACMP_INPUTSEL_NEGSEL_MASK)) |
bogdanm | 0:9b334a45a8ff | 273 | | (negSel << _ACMP_INPUTSEL_NEGSEL_SHIFT) |
bogdanm | 0:9b334a45a8ff | 274 | | (posSel << _ACMP_INPUTSEL_POSSEL_SHIFT); |
bogdanm | 0:9b334a45a8ff | 275 | } |
bogdanm | 0:9b334a45a8ff | 276 | |
bogdanm | 0:9b334a45a8ff | 277 | /***************************************************************************//** |
bogdanm | 0:9b334a45a8ff | 278 | * @brief |
bogdanm | 0:9b334a45a8ff | 279 | * |
bogdanm | 0:9b334a45a8ff | 280 | * |
bogdanm | 0:9b334a45a8ff | 281 | * @param[in] acmp |
bogdanm | 0:9b334a45a8ff | 282 | * Pointer to the ACMP peripheral register block. |
bogdanm | 0:9b334a45a8ff | 283 | * |
bogdanm | 0:9b334a45a8ff | 284 | * @param[in] init |
bogdanm | 0:9b334a45a8ff | 285 | * Pointer to initialization structure used to configure ACMP for capacative |
bogdanm | 0:9b334a45a8ff | 286 | * sensing operation. |
bogdanm | 0:9b334a45a8ff | 287 | ******************************************************************************/ |
bogdanm | 0:9b334a45a8ff | 288 | void ACMP_Init(ACMP_TypeDef *acmp, const ACMP_Init_TypeDef *init) |
bogdanm | 0:9b334a45a8ff | 289 | { |
bogdanm | 0:9b334a45a8ff | 290 | /* Make sure the module exists on the selected chip */ |
bogdanm | 0:9b334a45a8ff | 291 | EFM_ASSERT(ACMP_REF_VALID(acmp)); |
bogdanm | 0:9b334a45a8ff | 292 | |
bogdanm | 0:9b334a45a8ff | 293 | /* Make sure biasprog is within bounds */ |
bogdanm | 0:9b334a45a8ff | 294 | EFM_ASSERT(init->biasProg < 16); |
bogdanm | 0:9b334a45a8ff | 295 | |
bogdanm | 0:9b334a45a8ff | 296 | /* Set control register. No need to set interrupt modes */ |
bogdanm | 0:9b334a45a8ff | 297 | acmp->CTRL = (init->fullBias << _ACMP_CTRL_FULLBIAS_SHIFT) |
bogdanm | 0:9b334a45a8ff | 298 | | (init->halfBias << _ACMP_CTRL_HALFBIAS_SHIFT) |
bogdanm | 0:9b334a45a8ff | 299 | | (init->biasProg << _ACMP_CTRL_BIASPROG_SHIFT) |
bogdanm | 0:9b334a45a8ff | 300 | | (init->interruptOnFallingEdge << _ACMP_CTRL_IFALL_SHIFT) |
bogdanm | 0:9b334a45a8ff | 301 | | (init->interruptOnRisingEdge << _ACMP_CTRL_IRISE_SHIFT) |
bogdanm | 0:9b334a45a8ff | 302 | | (init->warmTime << _ACMP_CTRL_WARMTIME_SHIFT) |
bogdanm | 0:9b334a45a8ff | 303 | | (init->hysteresisLevel << _ACMP_CTRL_HYSTSEL_SHIFT) |
bogdanm | 0:9b334a45a8ff | 304 | | (init->inactiveValue << _ACMP_CTRL_INACTVAL_SHIFT); |
bogdanm | 0:9b334a45a8ff | 305 | |
bogdanm | 0:9b334a45a8ff | 306 | acmp->INPUTSEL = (init->lowPowerReferenceEnabled << _ACMP_INPUTSEL_LPREF_SHIFT) |
bogdanm | 0:9b334a45a8ff | 307 | | (init->vddLevel << _ACMP_INPUTSEL_VDDLEVEL_SHIFT); |
bogdanm | 0:9b334a45a8ff | 308 | |
bogdanm | 0:9b334a45a8ff | 309 | /* Enable ACMP if requested. |
bogdanm | 0:9b334a45a8ff | 310 | * Note: BITBAND_Peripheral() function is used for setting/clearing single |
bogdanm | 0:9b334a45a8ff | 311 | * bit peripheral register bitfields. */ |
bogdanm | 0:9b334a45a8ff | 312 | BITBAND_Peripheral(&(acmp->CTRL), |
bogdanm | 0:9b334a45a8ff | 313 | (uint32_t)_ACMP_CTRL_EN_SHIFT, |
bogdanm | 0:9b334a45a8ff | 314 | (uint32_t)init->enable); |
bogdanm | 0:9b334a45a8ff | 315 | } |
bogdanm | 0:9b334a45a8ff | 316 | |
bogdanm | 0:9b334a45a8ff | 317 | |
bogdanm | 0:9b334a45a8ff | 318 | /** @} (end addtogroup ACMP) */ |
bogdanm | 0:9b334a45a8ff | 319 | /** @} (end addtogroup EM_Library) */ |
bogdanm | 0:9b334a45a8ff | 320 | #endif /* defined(ACMP_COUNT) && (ACMP_COUNT > 0) */ |