rt-thread-code-stm32l475-st-discovery.rar,stm32l475-st-discovery

/** ********************************************************************************************************************** * @file stm32h5xx_hal_i3c.c * @author MCD Application Team * @brief I3C HAL module driver. * This file provides firmware functions to manage the following * functionalities of the Improvement Inter Integrated Circuit (I3C) peripheral: * + Initialization and de-initialization functions * + IO operation functions * + Peripheral State and Errors functions * ********************************************************************************************************************** * @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. * ********************************************************************************************************************** @verbatim ====================================================================================================================== ##### How to use this driver ##### ====================================================================================================================== [..] The I3C HAL driver can be used as follows: (#) Declare a I3C_HandleTypeDef handle structure, for example: I3C_HandleTypeDef hi3c; (#) Declare a I3C_XferTypeDef transfer descriptor structure, for example: I3C_XferTypeDef ContextBuffers; (#)Initialize the I3C low level resources by implementing the HAL_I3C_MspInit() API: (##) Enable the I3Cx interface clock (##) I3C pins configuration (+++) Enable the clock for the I3C GPIOs (+++) Configure I3C pins as alternate function push-pull with no-pull (##) NVIC configuration if you need to use interrupt process (+++) Configure the I3Cx interrupt priority (+++) Enable the NVIC I3C IRQ Channel (##) DMA Configuration if you need to use DMA process (+++) Declare a DMA_HandleTypeDef handle structure for the Command Common Code (CCC) management channel (+++) Declare a DMA_HandleTypeDef handle structure for the transmit channel (+++) Declare a DMA_HandleTypeDef handle structure for the receive channel (+++) Declare a DMA_HandleTypeDef handle structure for the status channel (+++) Enable the DMAx interface clock (+++) Configure the DMA handle parameters (+++) Configure the DMA Command Common Code (CCC) channel (+++) Configure the DMA Tx channel (+++) Configure the DMA Rx channel (+++) Configure the DMA Status channel (+++) Associate the initialized DMA handle to the hi3c DMA CCC, Tx, Rx or Status handle as necessary (+++) Configure the priority and enable the NVIC for the transfer complete interrupt on the DMA CCC, Tx, Rx or Status instance (#) Configure the HAL I3C Communication Mode as Controller or Target in the hi3c Init structure. (#) Configure the Controller Communication Bus characterics for Controller mode. This mean, configure the parameters SDAHoldTime, WaitTime, SCLPPLowDuration, SCLI3CHighDuration, SCLODLowDuration, SCLI2CHighDuration, BusFreeDuration, BusIdleDuration in the LL_I3C_CtrlBusConfTypeDef structure through h3c Init structure. (#) Configure the Target Communication Bus characterics for Target mode. This mean, configure the parameter BusAvailableDuration in the LL_I3C_TgtBusConfTypeDef structure through h3c Init structure. All these parameters for Controller or Target can be configured directly in user code or by using CubeMx generation. To help the computation of the different parameters, the recommendation is to use CubeMx. Those parameters can be modified after the hi3c initialization by using HAL_I3C_Ctrl_BusCharacteristicConfig() for controller and HAL_I3C_Tgt_BusCharacteristicConfig() for target. (#) Initialize the I3C registers by calling the HAL_I3C_Init(), configures also the low level Hardware (GPIO, CLOCK, NVIC...etc) by calling the customized HAL_I3C_MspInit(&hi3c) API. (#) Configure the different FIFO parameters in I3C_FifoConfTypeDef structure as RxFifoThreshold, TxFifoThreshold for Controller or Target mode. And enable/disable the Control or Status FIFO only for Controller Mode. Use HAL_I3C_SetConfigFifo() function to finalize the configuration, and HAL_I3C_GetConfigFifo() to retrieve FIFO configuration. Possibility to clear the FIFO configuration by using HAL_I3C_ClearConfigFifo() which reset the configuration FIFO to their default hardware value (#) Configure the different additional Controller configuration in I3C_CtrlConfTypeDef structure as DynamicAddr, StallTime, HotJoinAllowed, ACKStallState, CCCStallState, TxStallState, RxStallState, HighKeeperSDA. Use HAL_I3C_Ctrl_Config() function to finalize the Controller configuration. (#) Configure the different additional Target configuration in I3C_TgtConfTypeDef structure as Identifier, MIPIIdentifier, CtrlRoleRequest, HotJoinRequest, IBIRequest, IBIPayload, IBIPayloadSize, MaxReadDataSize, MaxWriteDataSize, CtrlCapability, GroupAddrCapability, DataTurnAroundDuration, MaxReadTurnAround, MaxDataSpeed, MaxSpeedLimitation, HandOffActivityState, HandOffDelay, PendingReadMDB. Use HAL_I3C_Tgt_Config() function to finalize the Target configuration. (#) Before initiate any IO operation, the application must launch an assignment of the different Target dynamic address by using HAL_I3C_Ctrl_DynAddrAssign() in polling mode or HAL_I3C_Ctrl_DynAddrAssign_IT() in interrupt mode. This procedure is named Enter Dynamic Address Assignment (ENTDAA CCC command). For the initiation of ENTDAA procedure from the controller, each target connected and powered on the I3C bus must repond to this particular Command Common Code by sending its proper Payload (a amount of 48bits which contain the target characteristics) Each time a target responds to ENTDAA sequence, the application is informed through HAL_I3C_TgtReqDynamicAddrCallback() of the reception of the target paylaod. And then application must send a associated dynamic address through HAL_I3C_Ctrl_SetDynAddr(). This procedure in loop automatically in hardware side until a target respond to repeated ENTDAA sequence. The application is informed of the end of the procedure at reception of HAL_I3C_CtrlDAACpltCallback(). At the end of procedure, the function HAL_I3C_Ctrl_ConfigBusDevices() must be called to store in hardware register part the target capabilities as Dynamic address, IBI support with or without additional data byte, Controller role request support, Controller stop transfer after IBI through I3C_DeviceConfTypeDef structure. (#) Other action to be done, before initiate any IO operation, the application must prepare the different frame descriptor with its associated buffer allocation in their side. Configure the different information related to CCC transfer through I3C_CCCTypeDef structure Configure the different information related to Private or I2C transfer through I3C_PrivateTypeDef structure Configure the different buffer pointers and associated size needed for the driver communication through I3C_XferTypeDef structure The I3C_XferTypeDef structur