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| Rev | Author | Line No. | Line |
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| 77 | mjames | 1 | /** |
| 2 | ****************************************************************************** |
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| 3 | * @file stm32l1xx_ll_opamp.c |
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| 4 | * @author MCD Application Team |
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| 5 | * @brief OPAMP LL module driver |
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| 6 | ****************************************************************************** |
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| 7 | * @attention |
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| 8 | * |
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| 9 | * Copyright (c) 2017 STMicroelectronics. |
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| 10 | * All rights reserved. |
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| 11 | * |
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| 12 | * This software is licensed under terms that can be found in the LICENSE file |
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| 13 | * in the root directory of this software component. |
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| 14 | * If no LICENSE file comes with this software, it is provided AS-IS. |
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| 15 | * |
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| 16 | ****************************************************************************** |
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| 17 | */ |
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| 18 | #if defined(USE_FULL_LL_DRIVER) |
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| 19 | |||
| 20 | /* Includes ------------------------------------------------------------------*/ |
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| 21 | #include "stm32l1xx_ll_opamp.h" |
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| 22 | |||
| 23 | #ifdef USE_FULL_ASSERT |
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| 24 | #include "stm32_assert.h" |
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| 25 | #else |
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| 26 | #define assert_param(expr) ((void)0U) |
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| 27 | #endif |
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| 28 | |||
| 29 | /** @addtogroup STM32L1xx_LL_Driver |
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| 30 | * @{ |
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| 31 | */ |
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| 32 | |||
| 33 | #if defined (OPAMP1) || defined (OPAMP2) || defined (OPAMP3) |
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| 34 | |||
| 35 | /** @addtogroup OPAMP_LL OPAMP |
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| 36 | * @{ |
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| 37 | */ |
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| 38 | |||
| 39 | /* Private types -------------------------------------------------------------*/ |
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| 40 | /* Private variables ---------------------------------------------------------*/ |
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| 41 | /* Private constants ---------------------------------------------------------*/ |
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| 42 | /* Private macros ------------------------------------------------------------*/ |
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| 43 | |||
| 44 | /** @addtogroup OPAMP_LL_Private_Macros |
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| 45 | * @{ |
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| 46 | */ |
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| 47 | |||
| 48 | /* Check of parameters for configuration of OPAMP hierarchical scope: */ |
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| 49 | /* OPAMP instance. */ |
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| 50 | |||
| 51 | #define IS_LL_OPAMP_POWER_MODE(__POWER_MODE__) \ |
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| 52 | ( ((__POWER_MODE__) == LL_OPAMP_POWERMODE_NORMAL) \ |
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| 53 | || ((__POWER_MODE__) == LL_OPAMP_POWERMODE_LOWPOWER)) |
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| 54 | |||
| 55 | #define IS_LL_OPAMP_FUNCTIONAL_MODE(__FUNCTIONAL_MODE__) \ |
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| 56 | ( ((__FUNCTIONAL_MODE__) == LL_OPAMP_MODE_STANDALONE) \ |
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| 57 | || ((__FUNCTIONAL_MODE__) == LL_OPAMP_MODE_FOLLOWER) \ |
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| 58 | ) |
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| 59 | |||
| 60 | /* Note: Comparator non-inverting inputs parameters are different */ |
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| 61 | /* depending on OPAMP instance. */ |
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| 62 | #if defined(OPAMP3) |
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| 63 | #define IS_LL_OPAMP_INPUT_NONINVERTING(__OPAMPX__, __INPUT_NONINVERTING__) \ |
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| 64 | (((__OPAMPX__) == OPAMP1) \ |
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| 65 | ? ( \ |
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| 66 | ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINVERT_IO0) \ |
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| 67 | || ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINV_DAC1_CH1) \ |
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| 68 | ) \ |
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| 69 | : \ |
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| 70 | (((__OPAMPX__) == OPAMP2) \ |
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| 71 | ? ( \ |
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| 72 | ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINVERT_IO0) \ |
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| 73 | || ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINV_DAC1_CH1) \ |
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| 74 | || ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINV_DAC1_CH2) \ |
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| 75 | ) \ |
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| 76 | : \ |
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| 77 | ( \ |
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| 78 | ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINVERT_IO0) \ |
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| 79 | || ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINV_DAC1_CH2_OPAMP3) \ |
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| 80 | ) \ |
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| 81 | ) \ |
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| 82 | ) |
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| 83 | #else |
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| 84 | #define IS_LL_OPAMP_INPUT_NONINVERTING(__OPAMPX__, __INPUT_NONINVERTING__) \ |
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| 85 | (((__OPAMPX__) == OPAMP1) \ |
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| 86 | ? ( \ |
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| 87 | ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINVERT_IO0) \ |
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| 88 | || ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINV_DAC1_CH1) \ |
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| 89 | ) \ |
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| 90 | : \ |
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| 91 | ( \ |
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| 92 | ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINVERT_IO0) \ |
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| 93 | || ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINV_DAC1_CH1) \ |
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| 94 | || ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINV_DAC1_CH2) \ |
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| 95 | ) \ |
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| 96 | ) |
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| 97 | #endif |
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| 98 | |||
| 99 | /* Note: Comparator non-inverting inputs parameters are the same on all */ |
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| 100 | /* OPAMP instances. */ |
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| 101 | /* However, comparator instance kept as macro parameter for */ |
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| 102 | /* compatibility with other STM32 families. */ |
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| 103 | #define IS_LL_OPAMP_INPUT_INVERTING(__OPAMPX__, __INPUT_INVERTING__) \ |
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| 104 | ( ((__INPUT_INVERTING__) == LL_OPAMP_INPUT_INVERT_IO0) \ |
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| 105 | || ((__INPUT_INVERTING__) == LL_OPAMP_INPUT_INVERT_IO1) \ |
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| 106 | || ((__INPUT_INVERTING__) == LL_OPAMP_INPUT_INVERT_CONNECT_NO) \ |
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| 107 | ) |
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| 108 | |||
| 109 | /** |
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| 110 | * @} |
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| 111 | */ |
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| 112 | |||
| 113 | |||
| 114 | /* Private function prototypes -----------------------------------------------*/ |
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| 115 | |||
| 116 | /* Exported functions --------------------------------------------------------*/ |
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| 117 | /** @addtogroup OPAMP_LL_Exported_Functions |
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| 118 | * @{ |
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| 119 | */ |
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| 120 | |||
| 121 | /** @addtogroup OPAMP_LL_EF_Init |
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| 122 | * @{ |
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| 123 | */ |
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| 124 | |||
| 125 | /** |
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| 126 | * @brief De-initialize registers of the selected OPAMP instance |
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| 127 | * to their default reset values. |
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| 128 | * @param OPAMPx OPAMP instance |
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| 129 | * @retval An ErrorStatus enumeration value: |
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| 130 | * - SUCCESS: OPAMP registers are de-initialized |
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| 131 | * - ERROR: OPAMP registers are not de-initialized |
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| 132 | */ |
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| 133 | ErrorStatus LL_OPAMP_DeInit(OPAMP_TypeDef* OPAMPx) |
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| 134 | { |
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| 135 | ErrorStatus status = SUCCESS; |
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| 136 | |||
| 137 | /* Check the parameters */ |
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| 138 | assert_param(IS_OPAMP_ALL_INSTANCE(OPAMPx)); |
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| 139 | |||
| 140 | MODIFY_REG(OPAMP->CSR, |
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| 141 | (OPAMP_CSR_S3SEL1 | OPAMP_CSR_S4SEL1 | OPAMP_CSR_S5SEL1 | OPAMP_CSR_S6SEL1 | OPAMP_CSR_OPA1CAL_L | OPAMP_CSR_OPA1CAL_H | OPAMP_CSR_OPA1LPM) << __OPAMP_INSTANCE_BITOFFSET(OPAMPx) |
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| 142 | | (OPAMP_CSR_ANAWSEL1) << __OPAMP_INSTANCE_DECIMAL(OPAMPx) |
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| 143 | | (OPAMP_CSR_S7SEL2 * __OPAMP_IS_INSTANCE_OPAMP2(OPAMPx)) , |
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| 144 | (OPAMP_CSR_OPA1PD) << __OPAMP_INSTANCE_BITOFFSET(OPAMPx) |
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| 145 | ); |
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| 146 | return status; |
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| 147 | } |
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| 148 | |||
| 149 | /** |
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| 150 | * @brief Initialize some features of OPAMP instance. |
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| 151 | * @note This function reset bit of calibration mode to ensure |
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| 152 | * to be in functional mode, in order to have OPAMP parameters |
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| 153 | * (inputs selection, ...) set with the corresponding OPAMP mode |
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| 154 | * to be effective. |
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| 155 | * @note This function configures features of the selected OPAMP instance. |
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| 156 | * Some features are also available at scope OPAMP common instance |
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| 157 | * (common to several OPAMP instances). |
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| 158 | * Refer to functions having argument "OPAMPxy_COMMON" as parameter. |
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| 159 | * @param OPAMPx OPAMP instance |
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| 160 | * @param OPAMP_InitStruct Pointer to a @ref LL_OPAMP_InitTypeDef structure |
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| 161 | * @retval An ErrorStatus enumeration value: |
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| 162 | * - SUCCESS: OPAMP registers are initialized |
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| 163 | * - ERROR: OPAMP registers are not initialized |
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| 164 | */ |
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| 165 | ErrorStatus LL_OPAMP_Init(OPAMP_TypeDef *OPAMPx, LL_OPAMP_InitTypeDef *OPAMP_InitStruct) |
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| 166 | { |
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| 167 | /* Check the parameters */ |
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| 168 | assert_param(IS_OPAMP_ALL_INSTANCE(OPAMPx)); |
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| 169 | assert_param(IS_LL_OPAMP_POWER_MODE(OPAMP_InitStruct->PowerMode)); |
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| 170 | assert_param(IS_LL_OPAMP_FUNCTIONAL_MODE(OPAMP_InitStruct->FunctionalMode)); |
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| 171 | assert_param(IS_LL_OPAMP_INPUT_NONINVERTING(OPAMPx, OPAMP_InitStruct->InputNonInverting)); |
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| 172 | |||
| 173 | /* Note: OPAMP inverting input can be used with OPAMP in mode standalone. */ |
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| 174 | /* Otherwise (OPAMP in mode follower), OPAMP inverting input is */ |
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| 175 | /* not used (not connected to GPIO pin). */ |
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| 176 | if(OPAMP_InitStruct->FunctionalMode != LL_OPAMP_MODE_FOLLOWER) |
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| 177 | { |
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| 178 | assert_param(IS_LL_OPAMP_INPUT_INVERTING(OPAMPx, OPAMP_InitStruct->InputInverting)); |
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| 179 | } |
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| 180 | |||
| 181 | /* Configuration of OPAMP instance : */ |
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| 182 | /* - PowerMode */ |
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| 183 | /* - Functional mode */ |
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| 184 | /* - Input non-inverting */ |
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| 185 | /* - Input inverting */ |
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| 186 | /* Note: Bits OPAMP_CSR_OPAxCAL_y reset to ensure to be in functional mode */ |
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| 187 | if(OPAMP_InitStruct->FunctionalMode != LL_OPAMP_MODE_FOLLOWER) |
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| 188 | { |
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| 189 | MODIFY_REG(OPAMP->CSR, |
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| 190 | (( |
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| 191 | OPAMP_CSR_OPA1LPM |
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| 192 | | OPAMP_CSR_S3SEL1 |
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| 193 | | OPAMP_CSR_OPA1CAL_H |
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| 194 | | OPAMP_CSR_OPA1CAL_L |
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| 195 | | OPAMP_CSR_S5SEL1 |
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| 196 | | OPAMP_CSR_S6SEL1 |
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| 197 | | OPAMP_CSR_S4SEL1 |
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| 198 | ) << __OPAMP_INSTANCE_BITOFFSET(OPAMPx) |
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| 199 | ) |
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| 200 | | ((OPAMP_CSR_ANAWSEL1) << __OPAMP_INSTANCE_DECIMAL(OPAMPx)) |
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| 201 | | (OPAMP_CSR_S7SEL2 * __OPAMP_IS_INSTANCE_OPAMP2(OPAMPx)) |
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| 202 | , |
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| 203 | (( |
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| 204 | (OPAMP_InitStruct->PowerMode & OPAMP_POWERMODE_CSR_BIT_MASK) |
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| 205 | | OPAMP_InitStruct->FunctionalMode |
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| 206 | | OPAMP_InitStruct->InputNonInverting |
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| 207 | | (OPAMP_InitStruct->InputInverting & OPAMP_CSR_S4SEL1) |
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| 208 | ) << __OPAMP_INSTANCE_BITOFFSET(OPAMPx) |
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| 209 | ) |
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| 210 | | ((OPAMP_InitStruct->InputInverting & OPAMP_CSR_ANAWSEL1) << __OPAMP_INSTANCE_DECIMAL(OPAMPx)) |
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| 211 | | ((OPAMP_InitStruct->InputNonInverting & OPAMP_CSR_S7SEL2) * __OPAMP_IS_INSTANCE_OPAMP2(OPAMPx)) |
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| 212 | ); |
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| 213 | } |
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| 214 | else |
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| 215 | { |
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| 216 | MODIFY_REG(OPAMP->CSR, |
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| 217 | (( |
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| 218 | OPAMP_CSR_OPA1LPM |
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| 219 | | OPAMP_CSR_OPA1CAL_H |
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| 220 | | OPAMP_CSR_OPA1CAL_L |
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| 221 | | OPAMP_CSR_S5SEL1 |
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| 222 | | OPAMP_CSR_S6SEL1 |
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| 223 | | OPAMP_CSR_S4SEL1 |
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| 224 | ) << __OPAMP_INSTANCE_BITOFFSET(OPAMPx) |
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| 225 | ) |
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| 226 | | ((OPAMP_CSR_ANAWSEL1) << __OPAMP_INSTANCE_DECIMAL(OPAMPx)) |
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| 227 | | (OPAMP_CSR_S7SEL2 * __OPAMP_IS_INSTANCE_OPAMP2(OPAMPx)) |
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| 228 | , |
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| 229 | (( |
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| 230 | (OPAMP_InitStruct->PowerMode & OPAMP_POWERMODE_CSR_BIT_MASK) |
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| 231 | | OPAMP_InitStruct->FunctionalMode |
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| 232 | | OPAMP_InitStruct->InputNonInverting |
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| 233 | | OPAMP_CSR_S3SEL1 |
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| 234 | ) << __OPAMP_INSTANCE_BITOFFSET(OPAMPx) |
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| 235 | ) |
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| 236 | | ((OPAMP_InitStruct->InputNonInverting & OPAMP_CSR_S7SEL2) * __OPAMP_IS_INSTANCE_OPAMP2(OPAMPx)) |
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| 237 | ); |
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| 238 | } |
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| 239 | return SUCCESS; |
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| 240 | } |
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| 241 | |||
| 242 | /** |
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| 243 | * @brief Set each @ref LL_OPAMP_InitTypeDef field to default value. |
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| 244 | * @param OPAMP_InitStruct pointer to a @ref LL_OPAMP_InitTypeDef structure |
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| 245 | * whose fields will be set to default values. |
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| 246 | * @retval None |
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| 247 | */ |
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| 248 | void LL_OPAMP_StructInit(LL_OPAMP_InitTypeDef *OPAMP_InitStruct) |
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| 249 | { |
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| 250 | /* Set OPAMP_InitStruct fields to default values */ |
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| 251 | OPAMP_InitStruct->PowerMode = LL_OPAMP_POWERMODE_NORMAL; |
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| 252 | OPAMP_InitStruct->FunctionalMode = LL_OPAMP_MODE_FOLLOWER; |
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| 253 | OPAMP_InitStruct->InputNonInverting = LL_OPAMP_INPUT_NONINVERT_IO0; |
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| 254 | /* Note: Parameter discarded if OPAMP in functional mode follower, */ |
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| 255 | /* set anyway to its default value. */ |
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| 256 | OPAMP_InitStruct->InputInverting = LL_OPAMP_INPUT_INVERT_CONNECT_NO; |
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| 257 | } |
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| 258 | |||
| 259 | /** |
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| 260 | * @} |
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| 261 | */ |
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| 262 | |||
| 263 | /** |
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| 264 | * @} |
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| 265 | */ |
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| 266 | |||
| 267 | /** |
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| 268 | * @} |
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| 269 | */ |
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| 270 | |||
| 271 | #endif /* OPAMP1 || OPAMP2 || OPAMP3 */ |
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| 272 | |||
| 273 | /** |
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| 274 | * @} |
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| 275 | */ |
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| 276 | |||
| 277 | #endif /* USE_FULL_LL_DRIVER */ |
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| 278 |