1 /**
2 ******************************************************************************
3 * @file stm32h7rsxx_ll_i3c.c
4 * @author MCD Application Team
5 * @brief I3C LL module driver.
6 ******************************************************************************
7 * @attention
8 *
9 * Copyright (c) 2022 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 "stm32h7rsxx_ll_i3c.h"
22 #include "stm32h7rsxx_ll_bus.h"
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 STM32H7RSxx_LL_Driver
30 * @{
31 */
32
33 #if defined (I3C1)
34
35 /** @defgroup I3C_LL I3C
36 * @{
37 */
38
39 /* Private types -------------------------------------------------------------*/
40 /* Private variables ---------------------------------------------------------*/
41 /* Private constants ---------------------------------------------------------*/
42 /* Private macros ------------------------------------------------------------*/
43 /** @addtogroup I3C_LL_Private_Macros
44 * @{
45 */
46 #define IS_LL_I3C_SDAHOLDTIME_VALUE(VALUE) (((VALUE) == LL_I3C_SDA_HOLD_TIME_0_5) || \
47 ((VALUE) == LL_I3C_SDA_HOLD_TIME_1_5))
48
49 #define IS_LL_I3C_WAITTIME_VALUE(VALUE) (((VALUE) == LL_I3C_OWN_ACTIVITY_STATE_0) || \
50 ((VALUE) == LL_I3C_OWN_ACTIVITY_STATE_1) || \
51 ((VALUE) == LL_I3C_OWN_ACTIVITY_STATE_2) || \
52 ((VALUE) == LL_I3C_OWN_ACTIVITY_STATE_3))
53 /**
54 * @}
55 */
56
57 /* Private function prototypes -----------------------------------------------*/
58
59 /* Exported functions --------------------------------------------------------*/
60 /** @addtogroup I3C_LL_Exported_Functions
61 * @{
62 */
63
64 /** @addtogroup I3C_LL_EF_Init
65 * @{
66 */
67
68 /**
69 * @brief De-initialize the I3C registers to their default reset values.
70 * @param I3Cx I3C Instance.
71 * @retval An ErrorStatus enumeration value:
72 * - SUCCESS: I3C registers are de-initialized
73 * - ERROR: I3C registers are not de-initialized
74 */
LL_I3C_DeInit(const I3C_TypeDef * I3Cx)75 ErrorStatus LL_I3C_DeInit(const I3C_TypeDef *I3Cx)
76 {
77 ErrorStatus status = SUCCESS;
78
79 /* Check the I3C Instance I3Cx */
80 assert_param(IS_I3C_ALL_INSTANCE(I3Cx));
81
82 /* Prevent unused argument(s) compilation warning */
83 UNUSED(I3Cx);
84
85 /* Force reset of I3C clock */
86 LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I3C1);
87
88 /* Release reset of I3C clock */
89 LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I3C1);
90
91 return status;
92 }
93
94 /**
95 * @brief Initialize the I3C registers according to the specified parameters in I3C_InitStruct.
96 * @param I3Cx I3C Instance.
97 * @param I3C_InitStruct pointer to a @ref LL_I3C_InitTypeDef structure.
98 * @param Mode I3C peripheral mode.
99 * This parameter can be a value of @ref I3C_LL_EC_MODE.
100 * @retval An ErrorStatus enumeration value:
101 * - SUCCESS: I3C registers are initialized
102 * - ERROR: Not applicable
103 */
LL_I3C_Init(I3C_TypeDef * I3Cx,LL_I3C_InitTypeDef * I3C_InitStruct,uint32_t Mode)104 ErrorStatus LL_I3C_Init(I3C_TypeDef *I3Cx, LL_I3C_InitTypeDef *I3C_InitStruct, uint32_t Mode)
105 {
106 uint32_t waveform_value;
107 uint32_t timing_value;
108
109 /* Check the I3C Instance I3Cx */
110 assert_param(IS_I3C_ALL_INSTANCE(I3Cx));
111
112 /* Disable the selected I3C peripheral */
113 LL_I3C_Disable(I3Cx);
114
115 /* Check on the I3C mode: initialization depends on the mode */
116 if (Mode == LL_I3C_MODE_CONTROLLER)
117 {
118 /* Check the parameters */
119 assert_param(IS_LL_I3C_SDAHOLDTIME_VALUE(I3C_InitStruct->CtrlBusCharacteristic.SDAHoldTime));
120 assert_param(IS_LL_I3C_WAITTIME_VALUE(I3C_InitStruct->CtrlBusCharacteristic.WaitTime));
121
122 /* Set Controller mode */
123 LL_I3C_SetMode(I3Cx, LL_I3C_MODE_CONTROLLER);
124
125 /*------------------ SCL signal waveform configuration : I3C timing register 0 (I3C_TIMINGR0) ------------------- */
126 /* Set the controller SCL waveform */
127 waveform_value =
128 ((uint32_t)(I3C_InitStruct->CtrlBusCharacteristic.SCLPPLowDuration) |
129 ((uint32_t)I3C_InitStruct->CtrlBusCharacteristic.SCLI3CHighDuration << I3C_TIMINGR0_SCLH_I3C_Pos) |
130 ((uint32_t)I3C_InitStruct->CtrlBusCharacteristic.SCLODLowDuration << I3C_TIMINGR0_SCLL_OD_Pos) |
131 ((uint32_t)I3C_InitStruct->CtrlBusCharacteristic.SCLI2CHighDuration << I3C_TIMINGR0_SCLH_I2C_Pos));
132
133 LL_I3C_ConfigClockWaveForm(I3Cx, waveform_value);
134
135 /*------------------- Timing configuration : I3C timing register 1 (I3C_TIMINGR1) ------------------------------- */
136 /* Set SDA hold time, activity state, bus free duration and bus available duration */
137 timing_value = ((uint32_t)(I3C_InitStruct->CtrlBusCharacteristic.SDAHoldTime) |
138 (uint32_t)(I3C_InitStruct->CtrlBusCharacteristic.WaitTime) |
139 ((uint32_t)I3C_InitStruct->CtrlBusCharacteristic.BusFreeDuration << I3C_TIMINGR1_FREE_Pos) |
140 (uint32_t)(I3C_InitStruct->CtrlBusCharacteristic.BusIdleDuration));
141
142 LL_I3C_SetCtrlBusCharacteristic(I3Cx, timing_value);
143 }
144 else
145 {
146 /* Set target mode */
147 LL_I3C_SetMode(I3Cx, LL_I3C_MODE_TARGET);
148
149 /*------------------- Timing configuration : I3C timing register 1 (I3C_TIMINGR1) ------------------------------- */
150 /* Set the number of kernel clocks cycles for the bus available condition time */
151 LL_I3C_SetTgtBusCharacteristic(I3Cx, I3C_InitStruct->TgtBusCharacteristic.BusAvailableDuration);
152 }
153
154 /* Enable the selected I3C peripheral */
155 LL_I3C_Enable(I3Cx);
156
157 return SUCCESS;
158 }
159
160 /**
161 * @brief Set each @ref LL_I3C_InitTypeDef field to default value.
162 * @param I3C_InitStruct Pointer to a @ref LL_I3C_InitTypeDef structure.
163 * @retval None
164 */
LL_I3C_StructInit(LL_I3C_InitTypeDef * I3C_InitStruct)165 void LL_I3C_StructInit(LL_I3C_InitTypeDef *I3C_InitStruct)
166 {
167 /* Set I3C_InitStruct fields to default values */
168 I3C_InitStruct->CtrlBusCharacteristic.SDAHoldTime = LL_I3C_SDA_HOLD_TIME_0_5;
169 I3C_InitStruct->CtrlBusCharacteristic.WaitTime = LL_I3C_OWN_ACTIVITY_STATE_0;
170 I3C_InitStruct->CtrlBusCharacteristic.SCLPPLowDuration = 0U;
171 I3C_InitStruct->CtrlBusCharacteristic.SCLI3CHighDuration = 0U;
172 I3C_InitStruct->CtrlBusCharacteristic.SCLODLowDuration = 0U;
173 I3C_InitStruct->CtrlBusCharacteristic.SCLI2CHighDuration = 0U;
174 I3C_InitStruct->CtrlBusCharacteristic.BusFreeDuration = 0U;
175 I3C_InitStruct->CtrlBusCharacteristic.BusIdleDuration = 0U;
176 I3C_InitStruct->TgtBusCharacteristic.BusAvailableDuration = 0U;
177 }
178
179 /**
180 * @}
181 */
182
183 /**
184 * @}
185 */
186
187 /**
188 * @}
189 */
190
191 #endif /* I3C1 */
192
193 /**
194 * @}
195 */
196
197 #endif /* USE_FULL_LL_DRIVER */
198
