openmv/lib/stm32/n6/src/stm32n6xx_ll_i3c.c
iabdalkader daf2bb30da misc: Restructure repo.
Signed-off-by: iabdalkader <i.abdalkader@gmail.com>
2025-04-13 08:28:34 +02:00

211 lines
7.1 KiB
C

/**
******************************************************************************
* @file stm32n6xx_ll_i3c.c
* @author MCD Application Team
* @brief I3C LL module driver.
******************************************************************************
* @attention
*
* Copyright (c) 2023 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
#if defined(USE_FULL_LL_DRIVER)
/* Includes ------------------------------------------------------------------*/
#include "stm32n6xx_ll_bus.h"
#include "stm32n6xx_ll_i3c.h"
#ifdef USE_FULL_ASSERT
#include "stm32_assert.h"
#else
#define assert_param(expr) ((void)0U)
#endif /* USE_FULL_ASSERT */
/** @addtogroup STM32N6xx_LL_Driver
* @{
*/
#if defined (I3C1) || defined (I3C2)
/** @defgroup I3C_LL I3C
* @{
*/
/* Private types -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private constants ---------------------------------------------------------*/
/* Private macros ------------------------------------------------------------*/
/** @addtogroup I3C_LL_Private_Macros
* @{
*/
#define IS_LL_I3C_SDAHOLDTIME_VALUE(VALUE) (((VALUE) == LL_I3C_SDA_HOLD_TIME_0_5) || \
((VALUE) == LL_I3C_SDA_HOLD_TIME_1_5))
#define IS_LL_I3C_WAITTIME_VALUE(VALUE) (((VALUE) == LL_I3C_OWN_ACTIVITY_STATE_0) || \
((VALUE) == LL_I3C_OWN_ACTIVITY_STATE_1) || \
((VALUE) == LL_I3C_OWN_ACTIVITY_STATE_2) || \
((VALUE) == LL_I3C_OWN_ACTIVITY_STATE_3))
/**
* @}
*/
/* Private function prototypes -----------------------------------------------*/
/* Exported functions --------------------------------------------------------*/
/** @addtogroup I3C_LL_Exported_Functions
* @{
*/
/** @addtogroup I3C_LL_EF_Init
* @{
*/
/**
* @brief De-initialize the I3C registers to their default reset values.
* @param I3Cx I3C Instance.
* @retval An ErrorStatus enumeration value:
* - SUCCESS: I3C registers are de-initialized
* - ERROR: I3C registers are not de-initialized
*/
ErrorStatus LL_I3C_DeInit(const I3C_TypeDef *I3Cx)
{
ErrorStatus status = SUCCESS;
/* Check the I3C Instance I3Cx */
assert_param(IS_I3C_ALL_INSTANCE(I3Cx));
if (I3Cx == I3C1)
{
/* Force reset of I3C clock */
LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I3C1);
/* Release reset of I3C clock */
LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I3C1);
}
else if (I3Cx == I3C2)
{
/* Force reset of I3C clock */
LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I3C2);
/* Release reset of I3C clock */
LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I3C2);
}
else
{
status = ERROR;
}
return status;
}
/**
* @brief Initialize the I3C registers according to the specified parameters in I3C_InitStruct.
* @param I3Cx I3C Instance.
* @param I3C_InitStruct pointer to a @ref LL_I3C_InitTypeDef structure.
* @param Mode I3C peripheral mode.
* This parameter can be a value of @ref I3C_LL_EC_MODE.
* @retval An ErrorStatus enumeration value:
* - SUCCESS: I3C registers are initialized
* - ERROR: Not applicable
*/
ErrorStatus LL_I3C_Init(I3C_TypeDef *I3Cx, LL_I3C_InitTypeDef *I3C_InitStruct, uint32_t Mode)
{
uint32_t waveform_value;
uint32_t timing_value;
/* Check the I3C Instance I3Cx */
assert_param(IS_I3C_ALL_INSTANCE(I3Cx));
/* Disable the selected I3C peripheral */
LL_I3C_Disable(I3Cx);
/* Check on the I3C mode: initialization depends on the mode */
if (Mode == LL_I3C_MODE_CONTROLLER)
{
/* Check the parameters */
assert_param(IS_LL_I3C_SDAHOLDTIME_VALUE(I3C_InitStruct->CtrlBusCharacteristic.SDAHoldTime));
assert_param(IS_LL_I3C_WAITTIME_VALUE(I3C_InitStruct->CtrlBusCharacteristic.WaitTime));
/* Set Controller mode */
LL_I3C_SetMode(I3Cx, LL_I3C_MODE_CONTROLLER);
/*------------------ SCL signal waveform configuration : I3C timing register 0 (I3C_TIMINGR0) ------------------- */
/* Set the controller SCL waveform */
waveform_value =
((uint32_t)(I3C_InitStruct->CtrlBusCharacteristic.SCLPPLowDuration) |
((uint32_t)I3C_InitStruct->CtrlBusCharacteristic.SCLI3CHighDuration << I3C_TIMINGR0_SCLH_I3C_Pos) |
((uint32_t)I3C_InitStruct->CtrlBusCharacteristic.SCLODLowDuration << I3C_TIMINGR0_SCLL_OD_Pos) |
((uint32_t)I3C_InitStruct->CtrlBusCharacteristic.SCLI2CHighDuration << I3C_TIMINGR0_SCLH_I2C_Pos));
LL_I3C_ConfigClockWaveForm(I3Cx, waveform_value);
/*------------------- Timing configuration : I3C timing register 1 (I3C_TIMINGR1) ------------------------------- */
/* Set SDA hold time, activity state, bus free duration and bus available duration */
timing_value = ((uint32_t)(I3C_InitStruct->CtrlBusCharacteristic.SDAHoldTime) |
(uint32_t)(I3C_InitStruct->CtrlBusCharacteristic.WaitTime) |
((uint32_t)I3C_InitStruct->CtrlBusCharacteristic.BusFreeDuration << I3C_TIMINGR1_FREE_Pos) |
(uint32_t)(I3C_InitStruct->CtrlBusCharacteristic.BusIdleDuration));
LL_I3C_SetCtrlBusCharacteristic(I3Cx, timing_value);
}
else
{
/* Set target mode */
LL_I3C_SetMode(I3Cx, LL_I3C_MODE_TARGET);
/*------------------- Timing configuration : I3C timing register 1 (I3C_TIMINGR1) ------------------------------- */
/* Set the number of kernel clocks cycles for the bus available condition time */
LL_I3C_SetTgtBusCharacteristic(I3Cx, I3C_InitStruct->TgtBusCharacteristic.BusAvailableDuration);
}
/* Enable the selected I3C peripheral */
LL_I3C_Enable(I3Cx);
return SUCCESS;
}
/**
* @brief Set each @ref LL_I3C_InitTypeDef field to default value.
* @param I3C_InitStruct Pointer to a @ref LL_I3C_InitTypeDef structure.
* @retval None
*/
void LL_I3C_StructInit(LL_I3C_InitTypeDef *I3C_InitStruct)
{
/* Set I3C_InitStruct fields to default values */
I3C_InitStruct->CtrlBusCharacteristic.SDAHoldTime = LL_I3C_SDA_HOLD_TIME_0_5;
I3C_InitStruct->CtrlBusCharacteristic.WaitTime = LL_I3C_OWN_ACTIVITY_STATE_0;
I3C_InitStruct->CtrlBusCharacteristic.SCLPPLowDuration = 0U;
I3C_InitStruct->CtrlBusCharacteristic.SCLI3CHighDuration = 0U;
I3C_InitStruct->CtrlBusCharacteristic.SCLODLowDuration = 0U;
I3C_InitStruct->CtrlBusCharacteristic.SCLI2CHighDuration = 0U;
I3C_InitStruct->CtrlBusCharacteristic.BusFreeDuration = 0U;
I3C_InitStruct->CtrlBusCharacteristic.BusIdleDuration = 0U;
I3C_InitStruct->TgtBusCharacteristic.BusAvailableDuration = 0U;
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
#endif /* I3C1 || I3C2 */
/**
* @}
*/
#endif /* USE_FULL_LL_DRIVER */