1 /**
2 ******************************************************************************
3 * @file stm32l0xx_hal_smbus_ex.c
4 * @author MCD Application Team
5 * @brief SMBUS Extended HAL module driver.
6 * This file provides firmware functions to manage the following
7 * functionalities of SMBUS Extended peripheral:
8 * + Extended features functions
9 *
10 ******************************************************************************
11 * @attention
12 *
13 * Copyright (c) 2016 STMicroelectronics.
14 * All rights reserved.
15 *
16 * This software is licensed under terms that can be found in the LICENSE file
17 * in the root directory of this software component.
18 * If no LICENSE file comes with this software, it is provided AS-IS.
19 *
20 ******************************************************************************
21 @verbatim
22 ==============================================================================
23 ##### SMBUS peripheral Extended features #####
24 ==============================================================================
25
26 [..] Comparing to other previous devices, the SMBUS interface for STM32L0xx
27 devices contains the following additional features
28
29 (+) Disable or enable wakeup from Stop mode(s)
30 (+) Disable or enable Fast Mode Plus
31
32 ##### How to use this driver #####
33 ==============================================================================
34 (#) Configure the enable or disable of SMBUS Wake Up Mode using the functions :
35 (++) HAL_SMBUSEx_EnableWakeUp()
36 (++) HAL_SMBUSEx_DisableWakeUp()
37 (#) Configure the enable or disable of fast mode plus driving capability using the functions :
38 (++) HAL_SMBUSEx_EnableFastModePlus()
39 (++) HAL_SMBUSEx_DisableFastModePlus()
40 @endverbatim
41 */
42
43 /* Includes ------------------------------------------------------------------*/
44 #include "stm32l0xx_hal.h"
45
46 /** @addtogroup STM32L0xx_HAL_Driver
47 * @{
48 */
49
50 /** @defgroup SMBUSEx SMBUSEx
51 * @brief SMBUS Extended HAL module driver
52 * @{
53 */
54
55 #ifdef HAL_SMBUS_MODULE_ENABLED
56
57 /* Private typedef -----------------------------------------------------------*/
58 /* Private define ------------------------------------------------------------*/
59 /* Private macro -------------------------------------------------------------*/
60 /* Private variables ---------------------------------------------------------*/
61 /* Private function prototypes -----------------------------------------------*/
62 /* Private functions ---------------------------------------------------------*/
63
64 /** @defgroup SMBUSEx_Exported_Functions SMBUS Extended Exported Functions
65 * @{
66 */
67
68 /** @defgroup SMBUSEx_Exported_Functions_Group2 WakeUp Mode Functions
69 * @brief WakeUp Mode Functions
70 *
71 @verbatim
72 ===============================================================================
73 ##### WakeUp Mode Functions #####
74 ===============================================================================
75 [..] This section provides functions allowing to:
76 (+) Configure Wake Up Feature
77
78 @endverbatim
79 * @{
80 */
81
82 /**
83 * @brief Enable SMBUS wakeup from Stop mode(s).
84 * @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
85 * the configuration information for the specified SMBUSx peripheral.
86 * @retval HAL status
87 */
HAL_SMBUSEx_EnableWakeUp(SMBUS_HandleTypeDef * hsmbus)88 HAL_StatusTypeDef HAL_SMBUSEx_EnableWakeUp(SMBUS_HandleTypeDef *hsmbus)
89 {
90 /* Check the parameters */
91 assert_param(IS_I2C_WAKEUP_FROMSTOP_INSTANCE(hsmbus->Instance));
92
93 if (hsmbus->State == HAL_SMBUS_STATE_READY)
94 {
95 /* Process Locked */
96 __HAL_LOCK(hsmbus);
97
98 hsmbus->State = HAL_SMBUS_STATE_BUSY;
99
100 /* Disable the selected SMBUS peripheral */
101 __HAL_SMBUS_DISABLE(hsmbus);
102
103 /* Enable wakeup from stop mode */
104 hsmbus->Instance->CR1 |= I2C_CR1_WUPEN;
105
106 __HAL_SMBUS_ENABLE(hsmbus);
107
108 hsmbus->State = HAL_SMBUS_STATE_READY;
109
110 /* Process Unlocked */
111 __HAL_UNLOCK(hsmbus);
112
113 return HAL_OK;
114 }
115 else
116 {
117 return HAL_BUSY;
118 }
119 }
120
121 /**
122 * @brief Disable SMBUS wakeup from Stop mode(s).
123 * @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
124 * the configuration information for the specified SMBUSx peripheral.
125 * @retval HAL status
126 */
HAL_SMBUSEx_DisableWakeUp(SMBUS_HandleTypeDef * hsmbus)127 HAL_StatusTypeDef HAL_SMBUSEx_DisableWakeUp(SMBUS_HandleTypeDef *hsmbus)
128 {
129 /* Check the parameters */
130 assert_param(IS_I2C_WAKEUP_FROMSTOP_INSTANCE(hsmbus->Instance));
131
132 if (hsmbus->State == HAL_SMBUS_STATE_READY)
133 {
134 /* Process Locked */
135 __HAL_LOCK(hsmbus);
136
137 hsmbus->State = HAL_SMBUS_STATE_BUSY;
138
139 /* Disable the selected SMBUS peripheral */
140 __HAL_SMBUS_DISABLE(hsmbus);
141
142 /* Disable wakeup from stop mode */
143 hsmbus->Instance->CR1 &= ~(I2C_CR1_WUPEN);
144
145 __HAL_SMBUS_ENABLE(hsmbus);
146
147 hsmbus->State = HAL_SMBUS_STATE_READY;
148
149 /* Process Unlocked */
150 __HAL_UNLOCK(hsmbus);
151
152 return HAL_OK;
153 }
154 else
155 {
156 return HAL_BUSY;
157 }
158 }
159 /**
160 * @}
161 */
162 #if (defined(SYSCFG_CFGR2_I2C_PB6_FMP) || defined(SYSCFG_CFGR2_I2C_PB7_FMP)) || (defined(SYSCFG_CFGR2_I2C_PB8_FMP) || defined(SYSCFG_CFGR2_I2C_PB9_FMP)) || (defined(SYSCFG_CFGR2_I2C1_FMP)) || defined(SYSCFG_CFGR2_I2C2_FMP) || defined(SYSCFG_CFGR2_I2C3_FMP)
163
164 /** @defgroup SMBUSEx_Exported_Functions_Group3 Fast Mode Plus Functions
165 * @brief Fast Mode Plus Functions
166 *
167 @verbatim
168 ===============================================================================
169 ##### Fast Mode Plus Functions #####
170 ===============================================================================
171 [..] This section provides functions allowing to:
172 (+) Configure Fast Mode Plus
173
174 @endverbatim
175 * @{
176 */
177
178 /**
179 * @brief Enable the SMBUS fast mode plus driving capability.
180 * @param ConfigFastModePlus Selects the pin.
181 * This parameter can be one of the @ref SMBUSEx_FastModePlus values
182 * @note For I2C1, fast mode plus driving capability can be enabled on all selected
183 * I2C1 pins using SMBUS_FASTMODEPLUS_I2C1 parameter or independently
184 * on each one of the following pins PB6, PB7, PB8 and PB9.
185 * @note For remaining I2C1 pins (PA14, PA15...) fast mode plus driving capability
186 * can be enabled only by using SMBUS_FASTMODEPLUS_I2C1 parameter.
187 * @note For all I2C2 pins fast mode plus driving capability can be enabled
188 * only by using SMBUS_FASTMODEPLUS_I2C2 parameter.
189 * @note For all I2C3 pins fast mode plus driving capability can be enabled
190 * only by using SMBUS_FASTMODEPLUS_I2C3 parameter.
191 * @retval None
192 */
HAL_SMBUSEx_EnableFastModePlus(uint32_t ConfigFastModePlus)193 void HAL_SMBUSEx_EnableFastModePlus(uint32_t ConfigFastModePlus)
194 {
195 /* Check the parameter */
196 assert_param(IS_SMBUS_FASTMODEPLUS(ConfigFastModePlus));
197
198 /* Enable SYSCFG clock */
199 __HAL_RCC_SYSCFG_CLK_ENABLE();
200
201 /* Enable fast mode plus driving capability for selected pin */
202 SET_BIT(SYSCFG->CFGR2, (uint32_t)ConfigFastModePlus);
203 }
204
205 /**
206 * @brief Disable the SMBUS fast mode plus driving capability.
207 * @param ConfigFastModePlus Selects the pin.
208 * This parameter can be one of the @ref SMBUSEx_FastModePlus values
209 * @note For I2C1, fast mode plus driving capability can be disabled on all selected
210 * I2C1 pins using SMBUS_FASTMODEPLUS_I2C1 parameter or independently
211 * on each one of the following pins PB6, PB7, PB8 and PB9.
212 * @note For remaining I2C1 pins (PA14, PA15...) fast mode plus driving capability
213 * can be disabled only by using SMBUS_FASTMODEPLUS_I2C1 parameter.
214 * @note For all I2C2 pins fast mode plus driving capability can be disabled
215 * only by using SMBUS_FASTMODEPLUS_I2C2 parameter.
216 * @note For all I2C3 pins fast mode plus driving capability can be disabled
217 * only by using SMBUS_FASTMODEPLUS_I2C3 parameter.
218 * @retval None
219 */
HAL_SMBUSEx_DisableFastModePlus(uint32_t ConfigFastModePlus)220 void HAL_SMBUSEx_DisableFastModePlus(uint32_t ConfigFastModePlus)
221 {
222 /* Check the parameter */
223 assert_param(IS_SMBUS_FASTMODEPLUS(ConfigFastModePlus));
224
225 /* Enable SYSCFG clock */
226 __HAL_RCC_SYSCFG_CLK_ENABLE();
227
228 /* Disable fast mode plus driving capability for selected pin */
229 CLEAR_BIT(SYSCFG->CFGR2, (uint32_t)ConfigFastModePlus);
230 }
231
232 /**
233 * @}
234 */
235
236 #endif /* Fast Mode Plus Availability */
237 /**
238 * @}
239 */
240
241 /**
242 * @}
243 */
244
245 #endif /* HAL_SMBUS_MODULE_ENABLED */
246 /**
247 * @}
248 */
249
250 /**
251 * @}
252 */
253
