1 /**
2 ******************************************************************************
3 * @file stm32l4xx_ll_opamp.c
4 * @author MCD Application Team
5 * @brief OPAMP LL module driver
6 ******************************************************************************
7 * @attention
8 *
9 * Copyright (c) 2017 STMicroelectronics.
10 * All rights reserved.
11 *
12 * This software is licensed under terms that can be found in the LICENSE file
13 * in the root directory of this software component.
14 * If no LICENSE file comes with this software, it is provided AS-IS.
15 *
16 ******************************************************************************
17 */
18 #if defined(USE_FULL_LL_DRIVER)
19
20 /* Includes ------------------------------------------------------------------*/
21 #include "stm32l4xx_ll_opamp.h"
22
23 #ifdef USE_FULL_ASSERT
24 #include "stm32_assert.h"
25 #else
26 #define assert_param(expr) ((void)0U)
27 #endif
28
29 /** @addtogroup STM32L4xx_LL_Driver
30 * @{
31 */
32
33 #if defined (OPAMP1) || defined (OPAMP2)
34
35 /** @addtogroup OPAMP_LL OPAMP
36 * @{
37 */
38
39 /* Private types -------------------------------------------------------------*/
40 /* Private variables ---------------------------------------------------------*/
41 /* Private constants ---------------------------------------------------------*/
42 /* Private macros ------------------------------------------------------------*/
43
44 /** @addtogroup OPAMP_LL_Private_Macros
45 * @{
46 */
47
48 /* Check of parameters for configuration of OPAMP hierarchical scope: */
49 /* OPAMP instance. */
50
51 #define IS_LL_OPAMP_POWER_MODE(__POWER_MODE__) \
52 ( ((__POWER_MODE__) == LL_OPAMP_POWERMODE_NORMALPOWER) \
53 || ((__POWER_MODE__) == LL_OPAMP_POWERMODE_LOWPOWER))
54
55 #define IS_LL_OPAMP_FUNCTIONAL_MODE(__FUNCTIONAL_MODE__) \
56 ( ((__FUNCTIONAL_MODE__) == LL_OPAMP_MODE_STANDALONE) \
57 || ((__FUNCTIONAL_MODE__) == LL_OPAMP_MODE_FOLLOWER) \
58 || ((__FUNCTIONAL_MODE__) == LL_OPAMP_MODE_PGA) \
59 )
60
61 /* Note: Comparator non-inverting inputs parameters are the same on all */
62 /* OPAMP instances. */
63 /* However, comparator instance kept as macro parameter for */
64 /* compatibility with other STM32 families. */
65 #define IS_LL_OPAMP_INPUT_NONINVERTING(__OPAMPX__, __INPUT_NONINVERTING__) \
66 ( ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINVERT_IO0) \
67 || ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINV_DAC1_CH1) \
68 )
69
70 /* Note: Comparator non-inverting inputs parameters are the same on all */
71 /* OPAMP instances. */
72 /* However, comparator instance kept as macro parameter for */
73 /* compatibility with other STM32 families. */
74 #define IS_LL_OPAMP_INPUT_INVERTING(__OPAMPX__, __INPUT_INVERTING__) \
75 ( ((__INPUT_INVERTING__) == LL_OPAMP_INPUT_INVERT_IO0) \
76 || ((__INPUT_INVERTING__) == LL_OPAMP_INPUT_INVERT_IO1) \
77 || ((__INPUT_INVERTING__) == LL_OPAMP_INPUT_INVERT_CONNECT_NO) \
78 )
79
80 /**
81 * @}
82 */
83
84
85 /* Private function prototypes -----------------------------------------------*/
86
87 /* Exported functions --------------------------------------------------------*/
88 /** @addtogroup OPAMP_LL_Exported_Functions
89 * @{
90 */
91
92 /** @addtogroup OPAMP_LL_EF_Init
93 * @{
94 */
95
96 /**
97 * @brief De-initialize registers of the selected OPAMP instance
98 * to their default reset values.
99 * @param OPAMPx OPAMP instance
100 * @retval An ErrorStatus enumeration value:
101 * - SUCCESS: OPAMP registers are de-initialized
102 * - ERROR: OPAMP registers are not de-initialized
103 */
LL_OPAMP_DeInit(OPAMP_TypeDef * OPAMPx)104 ErrorStatus LL_OPAMP_DeInit(OPAMP_TypeDef* OPAMPx)
105 {
106 ErrorStatus status = SUCCESS;
107
108 /* Check the parameters */
109 assert_param(IS_OPAMP_ALL_INSTANCE(OPAMPx));
110
111 LL_OPAMP_WriteReg(OPAMPx, CSR, 0x00000000U);
112
113 return status;
114 }
115
116 /**
117 * @brief Initialize some features of OPAMP instance.
118 * @note This function reset bit of calibration mode to ensure
119 * to be in functional mode, in order to have OPAMP parameters
120 * (inputs selection, ...) set with the corresponding OPAMP mode
121 * to be effective.
122 * @note This function configures features of the selected OPAMP instance.
123 * Some features are also available at scope OPAMP common instance
124 * (common to several OPAMP instances).
125 * Refer to functions having argument "OPAMPxy_COMMON" as parameter.
126 * @param OPAMPx OPAMP instance
127 * @param OPAMP_InitStruct Pointer to a @ref LL_OPAMP_InitTypeDef structure
128 * @retval An ErrorStatus enumeration value:
129 * - SUCCESS: OPAMP registers are initialized
130 * - ERROR: OPAMP registers are not initialized
131 */
LL_OPAMP_Init(OPAMP_TypeDef * OPAMPx,LL_OPAMP_InitTypeDef * OPAMP_InitStruct)132 ErrorStatus LL_OPAMP_Init(OPAMP_TypeDef *OPAMPx, LL_OPAMP_InitTypeDef *OPAMP_InitStruct)
133 {
134 /* Check the parameters */
135 assert_param(IS_OPAMP_ALL_INSTANCE(OPAMPx));
136 assert_param(IS_LL_OPAMP_POWER_MODE(OPAMP_InitStruct->PowerMode));
137 assert_param(IS_LL_OPAMP_FUNCTIONAL_MODE(OPAMP_InitStruct->FunctionalMode));
138 assert_param(IS_LL_OPAMP_INPUT_NONINVERTING(OPAMPx, OPAMP_InitStruct->InputNonInverting));
139
140 /* Note: OPAMP inverting input can be used with OPAMP in mode standalone */
141 /* or PGA with external capacitors for filtering circuit. */
142 /* Otherwise (OPAMP in mode follower), OPAMP inverting input is */
143 /* not used (not connected to GPIO pin). */
144 if(OPAMP_InitStruct->FunctionalMode != LL_OPAMP_MODE_FOLLOWER)
145 {
146 assert_param(IS_LL_OPAMP_INPUT_INVERTING(OPAMPx, OPAMP_InitStruct->InputInverting));
147 }
148
149 /* Configuration of OPAMP instance : */
150 /* - PowerMode */
151 /* - Functional mode */
152 /* - Input non-inverting */
153 /* - Input inverting */
154 /* Note: Bit OPAMP_CSR_CALON reset to ensure to be in functional mode. */
155 if(OPAMP_InitStruct->FunctionalMode != LL_OPAMP_MODE_FOLLOWER)
156 {
157 MODIFY_REG(OPAMPx->CSR,
158 OPAMP_CSR_OPALPM
159 | OPAMP_CSR_OPAMODE
160 | OPAMP_CSR_CALON
161 | OPAMP_CSR_VMSEL
162 | OPAMP_CSR_VPSEL
163 ,
164 (OPAMP_InitStruct->PowerMode & OPAMP_POWERMODE_CSR_BIT_MASK)
165 | OPAMP_InitStruct->FunctionalMode
166 | OPAMP_InitStruct->InputNonInverting
167 | OPAMP_InitStruct->InputInverting
168 );
169 }
170 else
171 {
172 MODIFY_REG(OPAMPx->CSR,
173 OPAMP_CSR_OPALPM
174 | OPAMP_CSR_OPAMODE
175 | OPAMP_CSR_CALON
176 | OPAMP_CSR_VMSEL
177 | OPAMP_CSR_VPSEL
178 ,
179 (OPAMP_InitStruct->PowerMode & OPAMP_POWERMODE_CSR_BIT_MASK)
180 | LL_OPAMP_MODE_FOLLOWER
181 | OPAMP_InitStruct->InputNonInverting
182 | LL_OPAMP_INPUT_INVERT_CONNECT_NO
183 );
184 }
185
186 return SUCCESS;
187 }
188
189 /**
190 * @brief Set each @ref LL_OPAMP_InitTypeDef field to default value.
191 * @param OPAMP_InitStruct pointer to a @ref LL_OPAMP_InitTypeDef structure
192 * whose fields will be set to default values.
193 * @retval None
194 */
LL_OPAMP_StructInit(LL_OPAMP_InitTypeDef * OPAMP_InitStruct)195 void LL_OPAMP_StructInit(LL_OPAMP_InitTypeDef *OPAMP_InitStruct)
196 {
197 /* Set OPAMP_InitStruct fields to default values */
198 OPAMP_InitStruct->PowerMode = LL_OPAMP_POWERMODE_NORMALPOWER;
199 OPAMP_InitStruct->FunctionalMode = LL_OPAMP_MODE_FOLLOWER;
200 OPAMP_InitStruct->InputNonInverting = LL_OPAMP_INPUT_NONINVERT_IO0;
201 /* Note: Parameter discarded if OPAMP in functional mode follower, */
202 /* set anyway to its default value. */
203 OPAMP_InitStruct->InputInverting = LL_OPAMP_INPUT_INVERT_CONNECT_NO;
204 }
205
206 /**
207 * @}
208 */
209
210 /**
211 * @}
212 */
213
214 /**
215 * @}
216 */
217
218 #endif /* OPAMP1 || OPAMP2 */
219
220 /**
221 * @}
222 */
223
224 #endif /* USE_FULL_LL_DRIVER */
225
