1 /**
2 ******************************************************************************
3 * @file stm32u0xx_ll_opamp.c
4 * @author MCD Application Team
5 * @brief OPAMP LL module driver
6 ******************************************************************************
7 * @attention
8 *
9 * Copyright (c) 2021 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 "stm32u0xx_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 /* USE_FULL_ASSERT */
28
29 /** @addtogroup STM32U0xx_LL_Driver
30 * @{
31 */
32
33 #if defined (OPAMP1)
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__) (((__POWER_MODE__) == LL_OPAMP_POWERMODE_NORMALPOWER_NORMALSPEED) ||\
52 ((__POWER_MODE__) == LL_OPAMP_POWERMODE_LOWPOWER_NORMALSPEED))
53
54
55 #define IS_LL_OPAMP_FUNCTIONAL_MODE(__FUNCTIONAL_MODE__) (((__FUNCTIONAL_MODE__) == LL_OPAMP_MODE_STANDALONE) ||\
56 ((__FUNCTIONAL_MODE__) == LL_OPAMP_MODE_FOLLOWER) ||\
57 ((__FUNCTIONAL_MODE__) == LL_OPAMP_MODE_PGA))
58
59 /* Note: Comparator non-inverting inputs parameters are the same on all */
60 /* OPAMP instances. */
61 /* However, comparator instance kept as macro parameter for */
62 /* compatibility with other STM32 families. */
63 #define IS_LL_OPAMP_INPUT_NONINVERTING(__OPAMPX__, __INPUT_NONINVERTING__) \
64 ( ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINVERT_IO0) \
65 || ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINV_DAC1_CH1) \
66 )
67
68 /* Note: Comparator non-inverting inputs parameters are the same on all */
69 /* OPAMP instances. */
70 /* However, comparator instance kept as macro parameter for */
71 /* compatibility with other STM32 families. */
72 #define IS_LL_OPAMP_INPUT_INVERTING(__OPAMPX__, __INPUT_INVERTING__) \
73 ( ((__INPUT_INVERTING__) == LL_OPAMP_INPUT_INVERT_IO0) \
74 || ((__INPUT_INVERTING__) == LL_OPAMP_INPUT_INVERT_CONNECT_NO) \
75 )
76
77 /**
78 * @}
79 */
80
81
82 /* Private function prototypes -----------------------------------------------*/
83
84 /* Exported functions --------------------------------------------------------*/
85 /** @addtogroup OPAMP_LL_Exported_Functions
86 * @{
87 */
88
89 /** @addtogroup OPAMP_LL_EF_Init
90 * @{
91 */
92
93 /**
94 * @brief De-initialize registers of the selected OPAMP instance
95 * to their default reset values.
96 * @param OPAMPx OPAMP instance
97 * @retval An ErrorStatus enumeration value:
98 * - SUCCESS: OPAMP registers are de-initialized
99 * - ERROR: OPAMP registers are not de-initialized
100 */
LL_OPAMP_DeInit(OPAMP_TypeDef * OPAMPx)101 ErrorStatus LL_OPAMP_DeInit(OPAMP_TypeDef *OPAMPx)
102 {
103 ErrorStatus status = SUCCESS;
104
105 /* Check the parameters */
106 assert_param(IS_OPAMP_ALL_INSTANCE(OPAMPx));
107
108 LL_OPAMP_WriteReg(OPAMPx, CSR, 0x00000000U);
109
110 return status;
111 }
112
113 /**
114 * @brief Initialize some features of OPAMP instance.
115 * @note This function reset bit of calibration mode to ensure
116 * to be in functional mode, in order to have OPAMP parameters
117 * (inputs selection, ...) set with the corresponding OPAMP mode
118 * to be effective.
119 * @note This function configures features of the selected OPAMP instance.
120 * Some features are also available at scope OPAMP common instance
121 * (common to several OPAMP instances).
122 * @param OPAMPx OPAMP instance
123 * @param OPAMP_InitStruct Pointer to a @ref LL_OPAMP_InitTypeDef structure
124 * @retval An ErrorStatus enumeration value:
125 * - SUCCESS: OPAMP registers are initialized
126 * - ERROR: OPAMP registers are not initialized
127 */
LL_OPAMP_Init(OPAMP_TypeDef * OPAMPx,const LL_OPAMP_InitTypeDef * OPAMP_InitStruct)128 ErrorStatus LL_OPAMP_Init(OPAMP_TypeDef *OPAMPx, const LL_OPAMP_InitTypeDef *OPAMP_InitStruct)
129 {
130 /* Check the parameters */
131 assert_param(IS_OPAMP_ALL_INSTANCE(OPAMPx));
132 assert_param(IS_LL_OPAMP_POWER_MODE(OPAMP_InitStruct->PowerMode));
133 assert_param(IS_LL_OPAMP_FUNCTIONAL_MODE(OPAMP_InitStruct->FunctionalMode));
134 assert_param(IS_LL_OPAMP_INPUT_NONINVERTING(OPAMPx, OPAMP_InitStruct->InputNonInverting));
135
136 /* Note: OPAMP inverting input can be used with OPAMP in mode standalone */
137 /* or PGA with external capacitors for filtering circuit. */
138 /* Otherwise (OPAMP in mode follower), OPAMP inverting input is */
139 /* not used (not connected to GPIO pin). */
140 if (OPAMP_InitStruct->FunctionalMode != LL_OPAMP_MODE_FOLLOWER)
141 {
142 assert_param(IS_LL_OPAMP_INPUT_INVERTING(OPAMPx, OPAMP_InitStruct->InputInverting));
143 }
144
145 /* Configuration of OPAMP instance : */
146 /* - PowerMode */
147 /* - Functional mode */
148 /* - Input non-inverting */
149 /* - Input inverting */
150 /* Note: Bit OPAMP_CSR_CALON reset to ensure to be in functional mode. */
151 if (OPAMP_InitStruct->FunctionalMode != LL_OPAMP_MODE_FOLLOWER)
152 {
153 MODIFY_REG(OPAMPx->CSR,
154 OPAMP_CSR_OPALPM
155 | OPAMP_CSR_OPAMODE
156 | OPAMP_CSR_CALON
157 | OPAMP_CSR_VM_SEL
158 | OPAMP_CSR_VP_SEL
159 ,
160 OPAMP_InitStruct->PowerMode
161 | OPAMP_InitStruct->FunctionalMode
162 | OPAMP_InitStruct->InputNonInverting
163 | OPAMP_InitStruct->InputInverting
164 );
165 }
166 else
167 {
168 MODIFY_REG(OPAMPx->CSR,
169 OPAMP_CSR_OPALPM
170 | OPAMP_CSR_OPAMODE
171 | OPAMP_CSR_CALON
172 | OPAMP_CSR_VM_SEL
173 | OPAMP_CSR_VP_SEL
174 ,
175 OPAMP_InitStruct->PowerMode
176 | LL_OPAMP_MODE_FOLLOWER
177 | OPAMP_InitStruct->InputNonInverting
178 | LL_OPAMP_INPUT_INVERT_CONNECT_NO
179 );
180 }
181
182 /* Set the power supply range to high for performance purpose */
183 /* The OPAMP_CSR_OPARANGE is common configuration for all OPAMPs */
184 /* bit OPAMP_CSR_OPARANGE applies for both OPAMPs */
185 MODIFY_REG(OPAMP1->CSR, OPAMP_CSR_OPARANGE, OPAMP_CSR_OPARANGE);
186
187 return SUCCESS;
188 }
189
190 /**
191 * @brief Set each @ref LL_OPAMP_InitTypeDef field to default value.
192 * @param OPAMP_InitStruct pointer to a @ref LL_OPAMP_InitTypeDef structure
193 * whose fields will be set to default values.
194 * @retval None
195 */
LL_OPAMP_StructInit(LL_OPAMP_InitTypeDef * OPAMP_InitStruct)196 void LL_OPAMP_StructInit(LL_OPAMP_InitTypeDef *OPAMP_InitStruct)
197 {
198 /* Set OPAMP_InitStruct fields to default values */
199 OPAMP_InitStruct->PowerMode = LL_OPAMP_POWERMODE_NORMALPOWER_NORMALSPEED;
200 OPAMP_InitStruct->FunctionalMode = LL_OPAMP_MODE_FOLLOWER;
201 OPAMP_InitStruct->InputNonInverting = LL_OPAMP_INPUT_NONINVERT_IO0;
202 /* Note: Parameter discarded if OPAMP in functional mode follower, */
203 /* set anyway to its default value. */
204 OPAMP_InitStruct->InputInverting = LL_OPAMP_INPUT_INVERT_CONNECT_NO;
205 }
206
207 /**
208 * @}
209 */
210
211 /**
212 * @}
213 */
214
215 /**
216 * @}
217 */
218
219 #endif /* OPAMP1 */
220
221 /**
222 * @}
223 */
224
225 #endif /* USE_FULL_LL_DRIVER */
226
227
