1 /**
2 ******************************************************************************
3 * @file stm32l1xx_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 "stm32l1xx_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 STM32L1xx_LL_Driver
31 * @{
32 */
33
34 #if defined (OPAMP1) || defined (OPAMP2) || defined (OPAMP3)
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 )
60
61 /* Note: Comparator non-inverting inputs parameters are different */
62 /* depending on OPAMP instance. */
63 #if defined(OPAMP3)
64 #define IS_LL_OPAMP_INPUT_NONINVERTING(__OPAMPX__, __INPUT_NONINVERTING__) \
65 (((__OPAMPX__) == OPAMP1) \
66 ? ( \
67 ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINVERT_IO0) \
68 || ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINV_DAC1_CH1) \
69 ) \
70 : \
71 (((__OPAMPX__) == OPAMP2) \
72 ? ( \
73 ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINVERT_IO0) \
74 || ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINV_DAC1_CH1) \
75 || ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINV_DAC1_CH2) \
76 ) \
77 : \
78 ( \
79 ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINVERT_IO0) \
80 || ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINV_DAC1_CH2_OPAMP3) \
81 ) \
82 ) \
83 )
84 #else
85 #define IS_LL_OPAMP_INPUT_NONINVERTING(__OPAMPX__, __INPUT_NONINVERTING__) \
86 (((__OPAMPX__) == OPAMP1) \
87 ? ( \
88 ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINVERT_IO0) \
89 || ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINV_DAC1_CH1) \
90 ) \
91 : \
92 ( \
93 ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINVERT_IO0) \
94 || ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINV_DAC1_CH1) \
95 || ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINV_DAC1_CH2) \
96 ) \
97 )
98 #endif
99
100 /* Note: Comparator non-inverting inputs parameters are the same on all */
101 /* OPAMP instances. */
102 /* However, comparator instance kept as macro parameter for */
103 /* compatibility with other STM32 families. */
104 #define IS_LL_OPAMP_INPUT_INVERTING(__OPAMPX__, __INPUT_INVERTING__) \
105 ( ((__INPUT_INVERTING__) == LL_OPAMP_INPUT_INVERT_IO0) \
106 || ((__INPUT_INVERTING__) == LL_OPAMP_INPUT_INVERT_IO1) \
107 || ((__INPUT_INVERTING__) == LL_OPAMP_INPUT_INVERT_CONNECT_NO) \
108 )
109
110 /**
111 * @}
112 */
113
114
115 /* Private function prototypes -----------------------------------------------*/
116
117 /* Exported functions --------------------------------------------------------*/
118 /** @addtogroup OPAMP_LL_Exported_Functions
119 * @{
120 */
121
122 /** @addtogroup OPAMP_LL_EF_Init
123 * @{
124 */
125
126 /**
127 * @brief De-initialize registers of the selected OPAMP instance
128 * to their default reset values.
129 * @param OPAMPx OPAMP instance
130 * @retval An ErrorStatus enumeration value:
131 * - SUCCESS: OPAMP registers are de-initialized
132 * - ERROR: OPAMP registers are not de-initialized
133 */
LL_OPAMP_DeInit(OPAMP_TypeDef * OPAMPx)134 ErrorStatus LL_OPAMP_DeInit(OPAMP_TypeDef* OPAMPx)
135 {
136 ErrorStatus status = SUCCESS;
137
138 /* Check the parameters */
139 assert_param(IS_OPAMP_ALL_INSTANCE(OPAMPx));
140
141 MODIFY_REG(OPAMP->CSR,
142 (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)
143 | (OPAMP_CSR_ANAWSEL1) << __OPAMP_INSTANCE_DECIMAL(OPAMPx)
144 | (OPAMP_CSR_S7SEL2 * __OPAMP_IS_INSTANCE_OPAMP2(OPAMPx)) ,
145 (OPAMP_CSR_OPA1PD) << __OPAMP_INSTANCE_BITOFFSET(OPAMPx)
146 );
147 return status;
148 }
149
150 /**
151 * @brief Initialize some features of OPAMP instance.
152 * @note This function reset bit of calibration mode to ensure
153 * to be in functional mode, in order to have OPAMP parameters
154 * (inputs selection, ...) set with the corresponding OPAMP mode
155 * to be effective.
156 * @note This function configures features of the selected OPAMP instance.
157 * Some features are also available at scope OPAMP common instance
158 * (common to several OPAMP instances).
159 * Refer to functions having argument "OPAMPxy_COMMON" as parameter.
160 * @param OPAMPx OPAMP instance
161 * @param OPAMP_InitStruct Pointer to a @ref LL_OPAMP_InitTypeDef structure
162 * @retval An ErrorStatus enumeration value:
163 * - SUCCESS: OPAMP registers are initialized
164 * - ERROR: OPAMP registers are not initialized
165 */
LL_OPAMP_Init(OPAMP_TypeDef * OPAMPx,LL_OPAMP_InitTypeDef * OPAMP_InitStruct)166 ErrorStatus LL_OPAMP_Init(OPAMP_TypeDef *OPAMPx, LL_OPAMP_InitTypeDef *OPAMP_InitStruct)
167 {
168 /* Check the parameters */
169 assert_param(IS_OPAMP_ALL_INSTANCE(OPAMPx));
170 assert_param(IS_LL_OPAMP_POWER_MODE(OPAMP_InitStruct->PowerMode));
171 assert_param(IS_LL_OPAMP_FUNCTIONAL_MODE(OPAMP_InitStruct->FunctionalMode));
172 assert_param(IS_LL_OPAMP_INPUT_NONINVERTING(OPAMPx, OPAMP_InitStruct->InputNonInverting));
173
174 /* Note: OPAMP inverting input can be used with OPAMP in mode standalone. */
175 /* Otherwise (OPAMP in mode follower), OPAMP inverting input is */
176 /* not used (not connected to GPIO pin). */
177 if(OPAMP_InitStruct->FunctionalMode != LL_OPAMP_MODE_FOLLOWER)
178 {
179 assert_param(IS_LL_OPAMP_INPUT_INVERTING(OPAMPx, OPAMP_InitStruct->InputInverting));
180 }
181
182 /* Configuration of OPAMP instance : */
183 /* - PowerMode */
184 /* - Functional mode */
185 /* - Input non-inverting */
186 /* - Input inverting */
187 /* Note: Bits OPAMP_CSR_OPAxCAL_y reset to ensure to be in functional mode */
188 if(OPAMP_InitStruct->FunctionalMode != LL_OPAMP_MODE_FOLLOWER)
189 {
190 MODIFY_REG(OPAMP->CSR,
191 ((
192 OPAMP_CSR_OPA1LPM
193 | OPAMP_CSR_S3SEL1
194 | OPAMP_CSR_OPA1CAL_H
195 | OPAMP_CSR_OPA1CAL_L
196 | OPAMP_CSR_S5SEL1
197 | OPAMP_CSR_S6SEL1
198 | OPAMP_CSR_S4SEL1
199 ) << __OPAMP_INSTANCE_BITOFFSET(OPAMPx)
200 )
201 | ((OPAMP_CSR_ANAWSEL1) << __OPAMP_INSTANCE_DECIMAL(OPAMPx))
202 | (OPAMP_CSR_S7SEL2 * __OPAMP_IS_INSTANCE_OPAMP2(OPAMPx))
203 ,
204 ((
205 (OPAMP_InitStruct->PowerMode & OPAMP_POWERMODE_CSR_BIT_MASK)
206 | OPAMP_InitStruct->FunctionalMode
207 | OPAMP_InitStruct->InputNonInverting
208 | (OPAMP_InitStruct->InputInverting & OPAMP_CSR_S4SEL1)
209 ) << __OPAMP_INSTANCE_BITOFFSET(OPAMPx)
210 )
211 | ((OPAMP_InitStruct->InputInverting & OPAMP_CSR_ANAWSEL1) << __OPAMP_INSTANCE_DECIMAL(OPAMPx))
212 | ((OPAMP_InitStruct->InputNonInverting & OPAMP_CSR_S7SEL2) * __OPAMP_IS_INSTANCE_OPAMP2(OPAMPx))
213 );
214 }
215 else
216 {
217 MODIFY_REG(OPAMP->CSR,
218 ((
219 OPAMP_CSR_OPA1LPM
220 | OPAMP_CSR_OPA1CAL_H
221 | OPAMP_CSR_OPA1CAL_L
222 | OPAMP_CSR_S5SEL1
223 | OPAMP_CSR_S6SEL1
224 | OPAMP_CSR_S4SEL1
225 ) << __OPAMP_INSTANCE_BITOFFSET(OPAMPx)
226 )
227 | ((OPAMP_CSR_ANAWSEL1) << __OPAMP_INSTANCE_DECIMAL(OPAMPx))
228 | (OPAMP_CSR_S7SEL2 * __OPAMP_IS_INSTANCE_OPAMP2(OPAMPx))
229 ,
230 ((
231 (OPAMP_InitStruct->PowerMode & OPAMP_POWERMODE_CSR_BIT_MASK)
232 | OPAMP_InitStruct->FunctionalMode
233 | OPAMP_InitStruct->InputNonInverting
234 | OPAMP_CSR_S3SEL1
235 ) << __OPAMP_INSTANCE_BITOFFSET(OPAMPx)
236 )
237 | ((OPAMP_InitStruct->InputNonInverting & OPAMP_CSR_S7SEL2) * __OPAMP_IS_INSTANCE_OPAMP2(OPAMPx))
238 );
239 }
240 return SUCCESS;
241 }
242
243 /**
244 * @brief Set each @ref LL_OPAMP_InitTypeDef field to default value.
245 * @param OPAMP_InitStruct pointer to a @ref LL_OPAMP_InitTypeDef structure
246 * whose fields will be set to default values.
247 * @retval None
248 */
LL_OPAMP_StructInit(LL_OPAMP_InitTypeDef * OPAMP_InitStruct)249 void LL_OPAMP_StructInit(LL_OPAMP_InitTypeDef *OPAMP_InitStruct)
250 {
251 /* Set OPAMP_InitStruct fields to default values */
252 OPAMP_InitStruct->PowerMode = LL_OPAMP_POWERMODE_NORMAL;
253 OPAMP_InitStruct->FunctionalMode = LL_OPAMP_MODE_FOLLOWER;
254 OPAMP_InitStruct->InputNonInverting = LL_OPAMP_INPUT_NONINVERT_IO0;
255 /* Note: Parameter discarded if OPAMP in functional mode follower, */
256 /* set anyway to its default value. */
257 OPAMP_InitStruct->InputInverting = LL_OPAMP_INPUT_INVERT_CONNECT_NO;
258 }
259
260 /**
261 * @}
262 */
263
264 /**
265 * @}
266 */
267
268 /**
269 * @}
270 */
271
272 #endif /* OPAMP1 || OPAMP2 || OPAMP3 */
273
274 /**
275 * @}
276 */
277
278 #endif /* USE_FULL_LL_DRIVER */
279
280 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
281