1 /**
2 ******************************************************************************
3 * @file stm32l4xx_ll_opamp.c
4 * @author MCD Application Team
5 * @brief OPAMP LL module driver
6 ******************************************************************************
7 * @attention
8 *
9 * <h2><center>© Copyright (c) 2017 STMicroelectronics.
10 * All rights reserved.</center></h2>
11 *
12 * This software component is licensed by ST under BSD 3-Clause license,
13 * the "License"; You may not use this file except in compliance with the
14 * License. You may obtain a copy of the License at:
15 * opensource.org/licenses/BSD-3-Clause
16 *
17 ******************************************************************************
18 */
19 #if defined(USE_FULL_LL_DRIVER)
20
21 /* Includes ------------------------------------------------------------------*/
22 #include "stm32l4xx_ll_opamp.h"
23
24 #ifdef USE_FULL_ASSERT
25 #include "stm32_assert.h"
26 #else
27 #define assert_param(expr) ((void)0U)
28 #endif
29
30 /** @addtogroup STM32L4xx_LL_Driver
31 * @{
32 */
33
34 #if defined (OPAMP1) || defined (OPAMP2)
35
36 /** @addtogroup OPAMP_LL OPAMP
37 * @{
38 */
39
40 /* Private types -------------------------------------------------------------*/
41 /* Private variables ---------------------------------------------------------*/
42 /* Private constants ---------------------------------------------------------*/
43 /* Private macros ------------------------------------------------------------*/
44
45 /** @addtogroup OPAMP_LL_Private_Macros
46 * @{
47 */
48
49 /* Check of parameters for configuration of OPAMP hierarchical scope: */
50 /* OPAMP instance. */
51
52 #define IS_LL_OPAMP_POWER_MODE(__POWER_MODE__) \
53 ( ((__POWER_MODE__) == LL_OPAMP_POWERMODE_NORMAL) \
54 || ((__POWER_MODE__) == LL_OPAMP_POWERMODE_LOWPOWER))
55
56 #define IS_LL_OPAMP_FUNCTIONAL_MODE(__FUNCTIONAL_MODE__) \
57 ( ((__FUNCTIONAL_MODE__) == LL_OPAMP_MODE_STANDALONE) \
58 || ((__FUNCTIONAL_MODE__) == LL_OPAMP_MODE_FOLLOWER) \
59 || ((__FUNCTIONAL_MODE__) == LL_OPAMP_MODE_PGA) \
60 )
61
62 /* Note: Comparator non-inverting inputs parameters are the same on all */
63 /* OPAMP instances. */
64 /* However, comparator instance kept as macro parameter for */
65 /* compatibility with other STM32 families. */
66 #define IS_LL_OPAMP_INPUT_NONINVERTING(__OPAMPX__, __INPUT_NONINVERTING__) \
67 ( ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINVERT_IO0) \
68 || ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINV_DAC1_CH1) \
69 )
70
71 /* Note: Comparator non-inverting inputs parameters are the same on all */
72 /* OPAMP instances. */
73 /* However, comparator instance kept as macro parameter for */
74 /* compatibility with other STM32 families. */
75 #define IS_LL_OPAMP_INPUT_INVERTING(__OPAMPX__, __INPUT_INVERTING__) \
76 ( ((__INPUT_INVERTING__) == LL_OPAMP_INPUT_INVERT_IO0) \
77 || ((__INPUT_INVERTING__) == LL_OPAMP_INPUT_INVERT_IO1) \
78 || ((__INPUT_INVERTING__) == LL_OPAMP_INPUT_INVERT_CONNECT_NO) \
79 )
80
81 /**
82 * @}
83 */
84
85
86 /* Private function prototypes -----------------------------------------------*/
87
88 /* Exported functions --------------------------------------------------------*/
89 /** @addtogroup OPAMP_LL_Exported_Functions
90 * @{
91 */
92
93 /** @addtogroup OPAMP_LL_EF_Init
94 * @{
95 */
96
97 /**
98 * @brief De-initialize registers of the selected OPAMP instance
99 * to their default reset values.
100 * @param OPAMPx OPAMP instance
101 * @retval An ErrorStatus enumeration value:
102 * - SUCCESS: OPAMP registers are de-initialized
103 * - ERROR: OPAMP registers are not de-initialized
104 */
LL_OPAMP_DeInit(OPAMP_TypeDef * OPAMPx)105 ErrorStatus LL_OPAMP_DeInit(OPAMP_TypeDef* OPAMPx)
106 {
107 ErrorStatus status = SUCCESS;
108
109 /* Check the parameters */
110 assert_param(IS_OPAMP_ALL_INSTANCE(OPAMPx));
111
112 LL_OPAMP_WriteReg(OPAMPx, CSR, 0x00000000U);
113
114 return status;
115 }
116
117 /**
118 * @brief Initialize some features of OPAMP instance.
119 * @note This function reset bit of calibration mode to ensure
120 * to be in functional mode, in order to have OPAMP parameters
121 * (inputs selection, ...) set with the corresponding OPAMP mode
122 * to be effective.
123 * @note This function configures features of the selected OPAMP instance.
124 * Some features are also available at scope OPAMP common instance
125 * (common to several OPAMP instances).
126 * Refer to functions having argument "OPAMPxy_COMMON" as parameter.
127 * @param OPAMPx OPAMP instance
128 * @param OPAMP_InitStruct Pointer to a @ref LL_OPAMP_InitTypeDef structure
129 * @retval An ErrorStatus enumeration value:
130 * - SUCCESS: OPAMP registers are initialized
131 * - ERROR: OPAMP registers are not initialized
132 */
LL_OPAMP_Init(OPAMP_TypeDef * OPAMPx,LL_OPAMP_InitTypeDef * OPAMP_InitStruct)133 ErrorStatus LL_OPAMP_Init(OPAMP_TypeDef *OPAMPx, LL_OPAMP_InitTypeDef *OPAMP_InitStruct)
134 {
135 /* Check the parameters */
136 assert_param(IS_OPAMP_ALL_INSTANCE(OPAMPx));
137 assert_param(IS_LL_OPAMP_POWER_MODE(OPAMP_InitStruct->PowerMode));
138 assert_param(IS_LL_OPAMP_FUNCTIONAL_MODE(OPAMP_InitStruct->FunctionalMode));
139 assert_param(IS_LL_OPAMP_INPUT_NONINVERTING(OPAMPx, OPAMP_InitStruct->InputNonInverting));
140
141 /* Note: OPAMP inverting input can be used with OPAMP in mode standalone */
142 /* or PGA with external capacitors for filtering circuit. */
143 /* Otherwise (OPAMP in mode follower), OPAMP inverting input is */
144 /* not used (not connected to GPIO pin). */
145 if(OPAMP_InitStruct->FunctionalMode != LL_OPAMP_MODE_FOLLOWER)
146 {
147 assert_param(IS_LL_OPAMP_INPUT_INVERTING(OPAMPx, OPAMP_InitStruct->InputInverting));
148 }
149
150 /* Configuration of OPAMP instance : */
151 /* - PowerMode */
152 /* - Functional mode */
153 /* - Input non-inverting */
154 /* - Input inverting */
155 /* Note: Bit OPAMP_CSR_CALON reset to ensure to be in functional mode. */
156 if(OPAMP_InitStruct->FunctionalMode != LL_OPAMP_MODE_FOLLOWER)
157 {
158 MODIFY_REG(OPAMPx->CSR,
159 OPAMP_CSR_OPALPM
160 | OPAMP_CSR_OPAMODE
161 | OPAMP_CSR_CALON
162 | OPAMP_CSR_VMSEL
163 | OPAMP_CSR_VPSEL
164 ,
165 (OPAMP_InitStruct->PowerMode & OPAMP_POWERMODE_CSR_BIT_MASK)
166 | OPAMP_InitStruct->FunctionalMode
167 | OPAMP_InitStruct->InputNonInverting
168 | OPAMP_InitStruct->InputInverting
169 );
170 }
171 else
172 {
173 MODIFY_REG(OPAMPx->CSR,
174 OPAMP_CSR_OPALPM
175 | OPAMP_CSR_OPAMODE
176 | OPAMP_CSR_CALON
177 | OPAMP_CSR_VMSEL
178 | OPAMP_CSR_VPSEL
179 ,
180 (OPAMP_InitStruct->PowerMode & OPAMP_POWERMODE_CSR_BIT_MASK)
181 | LL_OPAMP_MODE_FOLLOWER
182 | OPAMP_InitStruct->InputNonInverting
183 | LL_OPAMP_INPUT_INVERT_CONNECT_NO
184 );
185 }
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_NORMAL;
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 || OPAMP2 */
220
221 /**
222 * @}
223 */
224
225 #endif /* USE_FULL_LL_DRIVER */
226
227 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
228