added prescaler for 16 bit pwm in LPC1347 target
Fork of mbed-dev by
targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/emlib/src/em_vcmp.c@144:ef7eb2e8f9f7, 2016-09-02 (annotated)
- Committer:
- <>
- Date:
- Fri Sep 02 15:07:44 2016 +0100
- Revision:
- 144:ef7eb2e8f9f7
- Parent:
- 50:a417edff4437
This updates the lib to the mbed lib v125
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
<> | 144:ef7eb2e8f9f7 | 1 | /***************************************************************************//** |
<> | 144:ef7eb2e8f9f7 | 2 | * @file em_vcmp.c |
<> | 144:ef7eb2e8f9f7 | 3 | * @brief Voltage Comparator (VCMP) peripheral API |
<> | 144:ef7eb2e8f9f7 | 4 | * @version 4.2.1 |
<> | 144:ef7eb2e8f9f7 | 5 | ******************************************************************************* |
<> | 144:ef7eb2e8f9f7 | 6 | * @section License |
<> | 144:ef7eb2e8f9f7 | 7 | * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b> |
<> | 144:ef7eb2e8f9f7 | 8 | ******************************************************************************* |
<> | 144:ef7eb2e8f9f7 | 9 | * |
<> | 144:ef7eb2e8f9f7 | 10 | * Permission is granted to anyone to use this software for any purpose, |
<> | 144:ef7eb2e8f9f7 | 11 | * including commercial applications, and to alter it and redistribute it |
<> | 144:ef7eb2e8f9f7 | 12 | * freely, subject to the following restrictions: |
<> | 144:ef7eb2e8f9f7 | 13 | * |
<> | 144:ef7eb2e8f9f7 | 14 | * 1. The origin of this software must not be misrepresented; you must not |
<> | 144:ef7eb2e8f9f7 | 15 | * claim that you wrote the original software. |
<> | 144:ef7eb2e8f9f7 | 16 | * 2. Altered source versions must be plainly marked as such, and must not be |
<> | 144:ef7eb2e8f9f7 | 17 | * misrepresented as being the original software. |
<> | 144:ef7eb2e8f9f7 | 18 | * 3. This notice may not be removed or altered from any source distribution. |
<> | 144:ef7eb2e8f9f7 | 19 | * |
<> | 144:ef7eb2e8f9f7 | 20 | * DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no |
<> | 144:ef7eb2e8f9f7 | 21 | * obligation to support this Software. Silicon Labs is providing the |
<> | 144:ef7eb2e8f9f7 | 22 | * Software "AS IS", with no express or implied warranties of any kind, |
<> | 144:ef7eb2e8f9f7 | 23 | * including, but not limited to, any implied warranties of merchantability |
<> | 144:ef7eb2e8f9f7 | 24 | * or fitness for any particular purpose or warranties against infringement |
<> | 144:ef7eb2e8f9f7 | 25 | * of any proprietary rights of a third party. |
<> | 144:ef7eb2e8f9f7 | 26 | * |
<> | 144:ef7eb2e8f9f7 | 27 | * Silicon Labs will not be liable for any consequential, incidental, or |
<> | 144:ef7eb2e8f9f7 | 28 | * special damages, or any other relief, or for any claim by any third party, |
<> | 144:ef7eb2e8f9f7 | 29 | * arising from your use of this Software. |
<> | 144:ef7eb2e8f9f7 | 30 | * |
<> | 144:ef7eb2e8f9f7 | 31 | ******************************************************************************/ |
<> | 144:ef7eb2e8f9f7 | 32 | |
<> | 144:ef7eb2e8f9f7 | 33 | #include "em_vcmp.h" |
<> | 144:ef7eb2e8f9f7 | 34 | #if defined(VCMP_COUNT) && (VCMP_COUNT > 0) |
<> | 144:ef7eb2e8f9f7 | 35 | |
<> | 144:ef7eb2e8f9f7 | 36 | #include "em_assert.h" |
<> | 144:ef7eb2e8f9f7 | 37 | |
<> | 144:ef7eb2e8f9f7 | 38 | /***************************************************************************//** |
<> | 144:ef7eb2e8f9f7 | 39 | * @addtogroup EM_Library |
<> | 144:ef7eb2e8f9f7 | 40 | * @{ |
<> | 144:ef7eb2e8f9f7 | 41 | ******************************************************************************/ |
<> | 144:ef7eb2e8f9f7 | 42 | |
<> | 144:ef7eb2e8f9f7 | 43 | /***************************************************************************//** |
<> | 144:ef7eb2e8f9f7 | 44 | * @addtogroup VCMP |
<> | 144:ef7eb2e8f9f7 | 45 | * @brief Voltage Comparator (VCMP) Peripheral API |
<> | 144:ef7eb2e8f9f7 | 46 | * @{ |
<> | 144:ef7eb2e8f9f7 | 47 | ******************************************************************************/ |
<> | 144:ef7eb2e8f9f7 | 48 | |
<> | 144:ef7eb2e8f9f7 | 49 | /***************************************************************************//** |
<> | 144:ef7eb2e8f9f7 | 50 | * @brief |
<> | 144:ef7eb2e8f9f7 | 51 | * Configure and enable Voltage Comparator |
<> | 144:ef7eb2e8f9f7 | 52 | * |
<> | 144:ef7eb2e8f9f7 | 53 | * @param[in] vcmpInit |
<> | 144:ef7eb2e8f9f7 | 54 | * VCMP Initialization structure |
<> | 144:ef7eb2e8f9f7 | 55 | ******************************************************************************/ |
<> | 144:ef7eb2e8f9f7 | 56 | void VCMP_Init(const VCMP_Init_TypeDef *vcmpInit) |
<> | 144:ef7eb2e8f9f7 | 57 | { |
<> | 144:ef7eb2e8f9f7 | 58 | /* Verify input */ |
<> | 144:ef7eb2e8f9f7 | 59 | EFM_ASSERT((vcmpInit->inactive == 0) || (vcmpInit->inactive == 1)); |
<> | 144:ef7eb2e8f9f7 | 60 | EFM_ASSERT((vcmpInit->biasProg >= 0) && (vcmpInit->biasProg < 16)); |
<> | 144:ef7eb2e8f9f7 | 61 | |
<> | 144:ef7eb2e8f9f7 | 62 | /* Configure Half Bias setting */ |
<> | 144:ef7eb2e8f9f7 | 63 | if (vcmpInit->halfBias) |
<> | 144:ef7eb2e8f9f7 | 64 | { |
<> | 144:ef7eb2e8f9f7 | 65 | VCMP->CTRL |= VCMP_CTRL_HALFBIAS; |
<> | 144:ef7eb2e8f9f7 | 66 | } |
<> | 144:ef7eb2e8f9f7 | 67 | else |
<> | 144:ef7eb2e8f9f7 | 68 | { |
<> | 144:ef7eb2e8f9f7 | 69 | VCMP->CTRL &= ~(VCMP_CTRL_HALFBIAS); |
<> | 144:ef7eb2e8f9f7 | 70 | } |
<> | 144:ef7eb2e8f9f7 | 71 | |
<> | 144:ef7eb2e8f9f7 | 72 | /* Configure bias prog */ |
<> | 144:ef7eb2e8f9f7 | 73 | VCMP->CTRL &= ~(_VCMP_CTRL_BIASPROG_MASK); |
<> | 144:ef7eb2e8f9f7 | 74 | VCMP->CTRL |= (vcmpInit->biasProg << _VCMP_CTRL_BIASPROG_SHIFT); |
<> | 144:ef7eb2e8f9f7 | 75 | |
<> | 144:ef7eb2e8f9f7 | 76 | /* Configure sense for falling edge */ |
<> | 144:ef7eb2e8f9f7 | 77 | if (vcmpInit->irqFalling) |
<> | 144:ef7eb2e8f9f7 | 78 | { |
<> | 144:ef7eb2e8f9f7 | 79 | VCMP->CTRL |= VCMP_CTRL_IFALL; |
<> | 144:ef7eb2e8f9f7 | 80 | } |
<> | 144:ef7eb2e8f9f7 | 81 | else |
<> | 144:ef7eb2e8f9f7 | 82 | { |
<> | 144:ef7eb2e8f9f7 | 83 | VCMP->CTRL &= ~(VCMP_CTRL_IFALL); |
<> | 144:ef7eb2e8f9f7 | 84 | } |
<> | 144:ef7eb2e8f9f7 | 85 | |
<> | 144:ef7eb2e8f9f7 | 86 | /* Configure sense for rising edge */ |
<> | 144:ef7eb2e8f9f7 | 87 | if (vcmpInit->irqRising) |
<> | 144:ef7eb2e8f9f7 | 88 | { |
<> | 144:ef7eb2e8f9f7 | 89 | VCMP->CTRL |= VCMP_CTRL_IRISE; |
<> | 144:ef7eb2e8f9f7 | 90 | } |
<> | 144:ef7eb2e8f9f7 | 91 | else |
<> | 144:ef7eb2e8f9f7 | 92 | { |
<> | 144:ef7eb2e8f9f7 | 93 | VCMP->CTRL &= ~(VCMP_CTRL_IRISE); |
<> | 144:ef7eb2e8f9f7 | 94 | } |
<> | 144:ef7eb2e8f9f7 | 95 | |
<> | 144:ef7eb2e8f9f7 | 96 | /* Configure warm-up time */ |
<> | 144:ef7eb2e8f9f7 | 97 | VCMP->CTRL &= ~(_VCMP_CTRL_WARMTIME_MASK); |
<> | 144:ef7eb2e8f9f7 | 98 | VCMP->CTRL |= (vcmpInit->warmup << _VCMP_CTRL_WARMTIME_SHIFT); |
<> | 144:ef7eb2e8f9f7 | 99 | |
<> | 144:ef7eb2e8f9f7 | 100 | /* Configure hysteresis */ |
<> | 144:ef7eb2e8f9f7 | 101 | switch (vcmpInit->hyst) |
<> | 144:ef7eb2e8f9f7 | 102 | { |
<> | 144:ef7eb2e8f9f7 | 103 | case vcmpHyst20mV: |
<> | 144:ef7eb2e8f9f7 | 104 | VCMP->CTRL |= VCMP_CTRL_HYSTEN; |
<> | 144:ef7eb2e8f9f7 | 105 | break; |
<> | 144:ef7eb2e8f9f7 | 106 | case vcmpHystNone: |
<> | 144:ef7eb2e8f9f7 | 107 | VCMP->CTRL &= ~(VCMP_CTRL_HYSTEN); |
<> | 144:ef7eb2e8f9f7 | 108 | break; |
<> | 144:ef7eb2e8f9f7 | 109 | default: |
<> | 144:ef7eb2e8f9f7 | 110 | break; |
<> | 144:ef7eb2e8f9f7 | 111 | } |
<> | 144:ef7eb2e8f9f7 | 112 | |
<> | 144:ef7eb2e8f9f7 | 113 | /* Configure inactive output value */ |
<> | 144:ef7eb2e8f9f7 | 114 | VCMP->CTRL |= (vcmpInit->inactive << _VCMP_CTRL_INACTVAL_SHIFT); |
<> | 144:ef7eb2e8f9f7 | 115 | |
<> | 144:ef7eb2e8f9f7 | 116 | /* Configure trigger level */ |
<> | 144:ef7eb2e8f9f7 | 117 | VCMP_TriggerSet(vcmpInit->triggerLevel); |
<> | 144:ef7eb2e8f9f7 | 118 | |
<> | 144:ef7eb2e8f9f7 | 119 | /* Enable or disable VCMP */ |
<> | 144:ef7eb2e8f9f7 | 120 | if (vcmpInit->enable) |
<> | 144:ef7eb2e8f9f7 | 121 | { |
<> | 144:ef7eb2e8f9f7 | 122 | VCMP->CTRL |= VCMP_CTRL_EN; |
<> | 144:ef7eb2e8f9f7 | 123 | } |
<> | 144:ef7eb2e8f9f7 | 124 | else |
<> | 144:ef7eb2e8f9f7 | 125 | { |
<> | 144:ef7eb2e8f9f7 | 126 | VCMP->CTRL &= ~(VCMP_CTRL_EN); |
<> | 144:ef7eb2e8f9f7 | 127 | } |
<> | 144:ef7eb2e8f9f7 | 128 | |
<> | 144:ef7eb2e8f9f7 | 129 | /* If Low Power Reference is enabled, wait until VCMP is ready */ |
<> | 144:ef7eb2e8f9f7 | 130 | /* before enabling it, see reference manual for deatils */ |
<> | 144:ef7eb2e8f9f7 | 131 | /* Configuring Low Power Ref without enable has no effect */ |
<> | 144:ef7eb2e8f9f7 | 132 | if(vcmpInit->lowPowerRef && vcmpInit->enable) |
<> | 144:ef7eb2e8f9f7 | 133 | { |
<> | 144:ef7eb2e8f9f7 | 134 | /* Poll for VCMP ready */ |
<> | 144:ef7eb2e8f9f7 | 135 | while(!VCMP_Ready()); |
<> | 144:ef7eb2e8f9f7 | 136 | VCMP_LowPowerRefSet(vcmpInit->lowPowerRef); |
<> | 144:ef7eb2e8f9f7 | 137 | } |
<> | 144:ef7eb2e8f9f7 | 138 | |
<> | 144:ef7eb2e8f9f7 | 139 | /* Clear edge interrupt */ |
<> | 144:ef7eb2e8f9f7 | 140 | VCMP_IntClear(VCMP_IF_EDGE); |
<> | 144:ef7eb2e8f9f7 | 141 | } |
<> | 144:ef7eb2e8f9f7 | 142 | |
<> | 144:ef7eb2e8f9f7 | 143 | |
<> | 144:ef7eb2e8f9f7 | 144 | /***************************************************************************//** |
<> | 144:ef7eb2e8f9f7 | 145 | * @brief |
<> | 144:ef7eb2e8f9f7 | 146 | * Enable or disable Low Power Reference setting |
<> | 144:ef7eb2e8f9f7 | 147 | * |
<> | 144:ef7eb2e8f9f7 | 148 | * @param[in] enable |
<> | 144:ef7eb2e8f9f7 | 149 | * If true, enables low power reference, if false disable low power reference |
<> | 144:ef7eb2e8f9f7 | 150 | ******************************************************************************/ |
<> | 144:ef7eb2e8f9f7 | 151 | void VCMP_LowPowerRefSet(bool enable) |
<> | 144:ef7eb2e8f9f7 | 152 | { |
<> | 144:ef7eb2e8f9f7 | 153 | if (enable) |
<> | 144:ef7eb2e8f9f7 | 154 | { |
<> | 144:ef7eb2e8f9f7 | 155 | VCMP->INPUTSEL |= VCMP_INPUTSEL_LPREF; |
<> | 144:ef7eb2e8f9f7 | 156 | } |
<> | 144:ef7eb2e8f9f7 | 157 | else |
<> | 144:ef7eb2e8f9f7 | 158 | { |
<> | 144:ef7eb2e8f9f7 | 159 | VCMP->INPUTSEL &= ~VCMP_INPUTSEL_LPREF; |
<> | 144:ef7eb2e8f9f7 | 160 | } |
<> | 144:ef7eb2e8f9f7 | 161 | } |
<> | 144:ef7eb2e8f9f7 | 162 | |
<> | 144:ef7eb2e8f9f7 | 163 | |
<> | 144:ef7eb2e8f9f7 | 164 | /***************************************************************************//** |
<> | 144:ef7eb2e8f9f7 | 165 | * @brief |
<> | 144:ef7eb2e8f9f7 | 166 | * Configure trigger level of voltage comparator |
<> | 144:ef7eb2e8f9f7 | 167 | * |
<> | 144:ef7eb2e8f9f7 | 168 | * @param[in] level |
<> | 144:ef7eb2e8f9f7 | 169 | * Trigger value, in range 0-63 |
<> | 144:ef7eb2e8f9f7 | 170 | ******************************************************************************/ |
<> | 144:ef7eb2e8f9f7 | 171 | void VCMP_TriggerSet(int level) |
<> | 144:ef7eb2e8f9f7 | 172 | { |
<> | 144:ef7eb2e8f9f7 | 173 | /* Trigger range is 6 bits, value from 0-63 */ |
<> | 144:ef7eb2e8f9f7 | 174 | EFM_ASSERT((level > 0) && (level < 64)); |
<> | 144:ef7eb2e8f9f7 | 175 | |
<> | 144:ef7eb2e8f9f7 | 176 | /* Set trigger level */ |
<> | 144:ef7eb2e8f9f7 | 177 | VCMP->INPUTSEL = (VCMP->INPUTSEL & ~(_VCMP_INPUTSEL_TRIGLEVEL_MASK)) |
<> | 144:ef7eb2e8f9f7 | 178 | | (level << _VCMP_INPUTSEL_TRIGLEVEL_SHIFT); |
<> | 144:ef7eb2e8f9f7 | 179 | } |
<> | 144:ef7eb2e8f9f7 | 180 | |
<> | 144:ef7eb2e8f9f7 | 181 | |
<> | 144:ef7eb2e8f9f7 | 182 | /** @} (end addtogroup VCMP) */ |
<> | 144:ef7eb2e8f9f7 | 183 | /** @} (end addtogroup EM_Library) */ |
<> | 144:ef7eb2e8f9f7 | 184 | #endif /* defined(VCMP_COUNT) && (VCMP_COUNT > 0) */ |