source: trunk/firmware/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_i2c.c

Last change on this file was 6, checked in by f.jahn, 8 months ago
File size: 7.7 KB
Line 
1/**
2 ******************************************************************************
3 * @file stm32g0xx_ll_i2c.c
4 * @author MCD Application Team
5 * @brief I2C LL module driver.
6 ******************************************************************************
7 * @attention
8 *
9 * <h2><center>&copy; Copyright (c) 2018 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 "stm32g0xx_ll_i2c.h"
23#include "stm32g0xx_ll_bus.h"
24#ifdef USE_FULL_ASSERT
25#include "stm32_assert.h"
26#else
27#define assert_param(expr) ((void)0U)
28#endif
29
30/** @addtogroup STM32G0xx_LL_Driver
31 * @{
32 */
33
34#if defined (I2C1) || defined (I2C2)
35
36/** @defgroup I2C_LL I2C
37 * @{
38 */
39
40/* Private types -------------------------------------------------------------*/
41/* Private variables ---------------------------------------------------------*/
42/* Private constants ---------------------------------------------------------*/
43/* Private macros ------------------------------------------------------------*/
44/** @addtogroup I2C_LL_Private_Macros
45 * @{
46 */
47
48#define IS_LL_I2C_PERIPHERAL_MODE(__VALUE__) (((__VALUE__) == LL_I2C_MODE_I2C) || \
49 ((__VALUE__) == LL_I2C_MODE_SMBUS_HOST) || \
50 ((__VALUE__) == LL_I2C_MODE_SMBUS_DEVICE) || \
51 ((__VALUE__) == LL_I2C_MODE_SMBUS_DEVICE_ARP))
52
53#define IS_LL_I2C_ANALOG_FILTER(__VALUE__) (((__VALUE__) == LL_I2C_ANALOGFILTER_ENABLE) || \
54 ((__VALUE__) == LL_I2C_ANALOGFILTER_DISABLE))
55
56#define IS_LL_I2C_DIGITAL_FILTER(__VALUE__) ((__VALUE__) <= 0x0000000FU)
57
58#define IS_LL_I2C_OWN_ADDRESS1(__VALUE__) ((__VALUE__) <= 0x000003FFU)
59
60#define IS_LL_I2C_TYPE_ACKNOWLEDGE(__VALUE__) (((__VALUE__) == LL_I2C_ACK) || \
61 ((__VALUE__) == LL_I2C_NACK))
62
63#define IS_LL_I2C_OWN_ADDRSIZE(__VALUE__) (((__VALUE__) == LL_I2C_OWNADDRESS1_7BIT) || \
64 ((__VALUE__) == LL_I2C_OWNADDRESS1_10BIT))
65/**
66 * @}
67 */
68
69/* Private function prototypes -----------------------------------------------*/
70
71/* Exported functions --------------------------------------------------------*/
72/** @addtogroup I2C_LL_Exported_Functions
73 * @{
74 */
75
76/** @addtogroup I2C_LL_EF_Init
77 * @{
78 */
79
80/**
81 * @brief De-initialize the I2C registers to their default reset values.
82 * @param I2Cx I2C Instance.
83 * @retval An ErrorStatus enumeration value:
84 * - SUCCESS: I2C registers are de-initialized
85 * - ERROR: I2C registers are not de-initialized
86 */
87ErrorStatus LL_I2C_DeInit(I2C_TypeDef *I2Cx)
88{
89 ErrorStatus status = SUCCESS;
90
91 /* Check the I2C Instance I2Cx */
92 assert_param(IS_I2C_ALL_INSTANCE(I2Cx));
93
94 if (I2Cx == I2C1)
95 {
96 /* Force reset of I2C clock */
97 LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C1);
98
99 /* Release reset of I2C clock */
100 LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C1);
101 }
102 else if (I2Cx == I2C2)
103 {
104 /* Force reset of I2C clock */
105 LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C2);
106
107 /* Release reset of I2C clock */
108 LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C2);
109
110 }
111 else
112 {
113 status = ERROR;
114 }
115
116 return status;
117}
118
119/**
120 * @brief Initialize the I2C registers according to the specified parameters in I2C_InitStruct.
121 * @param I2Cx I2C Instance.
122 * @param I2C_InitStruct pointer to a @ref LL_I2C_InitTypeDef structure.
123 * @retval An ErrorStatus enumeration value:
124 * - SUCCESS: I2C registers are initialized
125 * - ERROR: Not applicable
126 */
127ErrorStatus LL_I2C_Init(I2C_TypeDef *I2Cx, LL_I2C_InitTypeDef *I2C_InitStruct)
128{
129 /* Check the I2C Instance I2Cx */
130 assert_param(IS_I2C_ALL_INSTANCE(I2Cx));
131
132 /* Check the I2C parameters from I2C_InitStruct */
133 assert_param(IS_LL_I2C_PERIPHERAL_MODE(I2C_InitStruct->PeripheralMode));
134 assert_param(IS_LL_I2C_ANALOG_FILTER(I2C_InitStruct->AnalogFilter));
135 assert_param(IS_LL_I2C_DIGITAL_FILTER(I2C_InitStruct->DigitalFilter));
136 assert_param(IS_LL_I2C_OWN_ADDRESS1(I2C_InitStruct->OwnAddress1));
137 assert_param(IS_LL_I2C_TYPE_ACKNOWLEDGE(I2C_InitStruct->TypeAcknowledge));
138 assert_param(IS_LL_I2C_OWN_ADDRSIZE(I2C_InitStruct->OwnAddrSize));
139
140 /* Disable the selected I2Cx Peripheral */
141 LL_I2C_Disable(I2Cx);
142
143 /*---------------------------- I2Cx CR1 Configuration ------------------------
144 * Configure the analog and digital noise filters with parameters :
145 * - AnalogFilter: I2C_CR1_ANFOFF bit
146 * - DigitalFilter: I2C_CR1_DNF[3:0] bits
147 */
148 LL_I2C_ConfigFilters(I2Cx, I2C_InitStruct->AnalogFilter, I2C_InitStruct->DigitalFilter);
149
150 /*---------------------------- I2Cx TIMINGR Configuration --------------------
151 * Configure the SDA setup, hold time and the SCL high, low period with parameter :
152 * - Timing: I2C_TIMINGR_PRESC[3:0], I2C_TIMINGR_SCLDEL[3:0], I2C_TIMINGR_SDADEL[3:0],
153 * I2C_TIMINGR_SCLH[7:0] and I2C_TIMINGR_SCLL[7:0] bits
154 */
155 LL_I2C_SetTiming(I2Cx, I2C_InitStruct->Timing);
156
157 /* Enable the selected I2Cx Peripheral */
158 LL_I2C_Enable(I2Cx);
159
160 /*---------------------------- I2Cx OAR1 Configuration -----------------------
161 * Disable, Configure and Enable I2Cx device own address 1 with parameters :
162 * - OwnAddress1: I2C_OAR1_OA1[9:0] bits
163 * - OwnAddrSize: I2C_OAR1_OA1MODE bit
164 */
165 LL_I2C_DisableOwnAddress1(I2Cx);
166 LL_I2C_SetOwnAddress1(I2Cx, I2C_InitStruct->OwnAddress1, I2C_InitStruct->OwnAddrSize);
167
168 /* OwnAdress1 == 0 is reserved for General Call address */
169 if (I2C_InitStruct->OwnAddress1 != 0U)
170 {
171 LL_I2C_EnableOwnAddress1(I2Cx);
172 }
173
174 /*---------------------------- I2Cx MODE Configuration -----------------------
175 * Configure I2Cx peripheral mode with parameter :
176 * - PeripheralMode: I2C_CR1_SMBDEN and I2C_CR1_SMBHEN bits
177 */
178 LL_I2C_SetMode(I2Cx, I2C_InitStruct->PeripheralMode);
179
180 /*---------------------------- I2Cx CR2 Configuration ------------------------
181 * Configure the ACKnowledge or Non ACKnowledge condition
182 * after the address receive match code or next received byte with parameter :
183 * - TypeAcknowledge: I2C_CR2_NACK bit
184 */
185 LL_I2C_AcknowledgeNextData(I2Cx, I2C_InitStruct->TypeAcknowledge);
186
187 return SUCCESS;
188}
189
190/**
191 * @brief Set each @ref LL_I2C_InitTypeDef field to default value.
192 * @param I2C_InitStruct Pointer to a @ref LL_I2C_InitTypeDef structure.
193 * @retval None
194 */
195void LL_I2C_StructInit(LL_I2C_InitTypeDef *I2C_InitStruct)
196{
197 /* Set I2C_InitStruct fields to default values */
198 I2C_InitStruct->PeripheralMode = LL_I2C_MODE_I2C;
199 I2C_InitStruct->Timing = 0U;
200 I2C_InitStruct->AnalogFilter = LL_I2C_ANALOGFILTER_ENABLE;
201 I2C_InitStruct->DigitalFilter = 0U;
202 I2C_InitStruct->OwnAddress1 = 0U;
203 I2C_InitStruct->TypeAcknowledge = LL_I2C_NACK;
204 I2C_InitStruct->OwnAddrSize = LL_I2C_OWNADDRESS1_7BIT;
205}
206
207/**
208 * @}
209 */
210
211/**
212 * @}
213 */
214
215/**
216 * @}
217 */
218
219#endif /* I2C1 || I2C2 */
220
221/**
222 * @}
223 */
224
225#endif /* USE_FULL_LL_DRIVER */
226
227/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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