856 lines
34 KiB
C
856 lines
34 KiB
C
/*
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* Copyright (c) 2015-2016, Freescale Semiconductor, Inc.
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* Copyright 2016-2017 NXP
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* All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef _FSL_LPUART_H_
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#define _FSL_LPUART_H_
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#include "fsl_common.h"
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/*!
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* @addtogroup lpuart_driver
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* @{
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*/
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/*******************************************************************************
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* Definitions
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******************************************************************************/
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/*! @name Driver version */
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/*@{*/
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/*! @brief LPUART driver version 2.2.6. */
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#define FSL_LPUART_DRIVER_VERSION (MAKE_VERSION(2, 2, 6))
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/*@}*/
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/*! @brief Error codes for the LPUART driver. */
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enum _lpuart_status
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{
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kStatus_LPUART_TxBusy = MAKE_STATUS(kStatusGroup_LPUART, 0), /*!< TX busy */
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kStatus_LPUART_RxBusy = MAKE_STATUS(kStatusGroup_LPUART, 1), /*!< RX busy */
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kStatus_LPUART_TxIdle = MAKE_STATUS(kStatusGroup_LPUART, 2), /*!< LPUART transmitter is idle. */
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kStatus_LPUART_RxIdle = MAKE_STATUS(kStatusGroup_LPUART, 3), /*!< LPUART receiver is idle. */
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kStatus_LPUART_TxWatermarkTooLarge = MAKE_STATUS(kStatusGroup_LPUART, 4), /*!< TX FIFO watermark too large */
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kStatus_LPUART_RxWatermarkTooLarge = MAKE_STATUS(kStatusGroup_LPUART, 5), /*!< RX FIFO watermark too large */
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kStatus_LPUART_FlagCannotClearManually = MAKE_STATUS(kStatusGroup_LPUART, 6), /*!< Some flag can't manually clear */
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kStatus_LPUART_Error = MAKE_STATUS(kStatusGroup_LPUART, 7), /*!< Error happens on LPUART. */
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kStatus_LPUART_RxRingBufferOverrun =
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MAKE_STATUS(kStatusGroup_LPUART, 8), /*!< LPUART RX software ring buffer overrun. */
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kStatus_LPUART_RxHardwareOverrun = MAKE_STATUS(kStatusGroup_LPUART, 9), /*!< LPUART RX receiver overrun. */
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kStatus_LPUART_NoiseError = MAKE_STATUS(kStatusGroup_LPUART, 10), /*!< LPUART noise error. */
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kStatus_LPUART_FramingError = MAKE_STATUS(kStatusGroup_LPUART, 11), /*!< LPUART framing error. */
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kStatus_LPUART_ParityError = MAKE_STATUS(kStatusGroup_LPUART, 12), /*!< LPUART parity error. */
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kStatus_LPUART_BaudrateNotSupport =
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MAKE_STATUS(kStatusGroup_LPUART, 13), /*!< Baudrate is not support in current clock source */
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kStatus_LPUART_IdleLineDetected = MAKE_STATUS(kStatusGroup_LPUART, 14), /*!< IDLE flag. */
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};
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/*! @brief LPUART parity mode. */
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typedef enum _lpuart_parity_mode
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{
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kLPUART_ParityDisabled = 0x0U, /*!< Parity disabled */
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kLPUART_ParityEven = 0x2U, /*!< Parity enabled, type even, bit setting: PE|PT = 10 */
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kLPUART_ParityOdd = 0x3U, /*!< Parity enabled, type odd, bit setting: PE|PT = 11 */
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} lpuart_parity_mode_t;
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/*! @brief LPUART data bits count. */
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typedef enum _lpuart_data_bits
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{
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kLPUART_EightDataBits = 0x0U, /*!< Eight data bit */
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#if defined(FSL_FEATURE_LPUART_HAS_7BIT_DATA_SUPPORT) && FSL_FEATURE_LPUART_HAS_7BIT_DATA_SUPPORT
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kLPUART_SevenDataBits = 0x1U, /*!< Seven data bit */
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#endif
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} lpuart_data_bits_t;
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/*! @brief LPUART stop bit count. */
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typedef enum _lpuart_stop_bit_count
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{
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kLPUART_OneStopBit = 0U, /*!< One stop bit */
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kLPUART_TwoStopBit = 1U, /*!< Two stop bits */
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} lpuart_stop_bit_count_t;
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#if defined(FSL_FEATURE_LPUART_HAS_MODEM_SUPPORT) && FSL_FEATURE_LPUART_HAS_MODEM_SUPPORT
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/*! @brief LPUART transmit CTS source. */
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typedef enum _lpuart_transmit_cts_source
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{
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kLPUART_CtsSourcePin = 0U, /*!< CTS resource is the LPUART_CTS pin. */
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kLPUART_CtsSourceMatchResult = 1U, /*!< CTS resource is the match result. */
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} lpuart_transmit_cts_source_t;
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/*! @brief LPUART transmit CTS configure. */
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typedef enum _lpuart_transmit_cts_config
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{
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kLPUART_CtsSampleAtStart = 0U, /*!< CTS input is sampled at the start of each character. */
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kLPUART_CtsSampleAtIdle = 1U, /*!< CTS input is sampled when the transmitter is idle */
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} lpuart_transmit_cts_config_t;
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#endif
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/*! @brief LPUART idle flag type defines when the receiver starts counting. */
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typedef enum _lpuart_idle_type_select
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{
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kLPUART_IdleTypeStartBit = 0U, /*!< Start counting after a valid start bit. */
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kLPUART_IdleTypeStopBit = 1U, /*!< Start counting after a stop bit. */
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} lpuart_idle_type_select_t;
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/*! @brief LPUART idle detected configuration.
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* This structure defines the number of idle characters that must be received before
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* the IDLE flag is set.
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*/
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typedef enum _lpuart_idle_config
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{
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kLPUART_IdleCharacter1 = 0U, /*!< the number of idle characters. */
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kLPUART_IdleCharacter2 = 1U, /*!< the number of idle characters. */
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kLPUART_IdleCharacter4 = 2U, /*!< the number of idle characters. */
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kLPUART_IdleCharacter8 = 3U, /*!< the number of idle characters. */
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kLPUART_IdleCharacter16 = 4U, /*!< the number of idle characters. */
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kLPUART_IdleCharacter32 = 5U, /*!< the number of idle characters. */
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kLPUART_IdleCharacter64 = 6U, /*!< the number of idle characters. */
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kLPUART_IdleCharacter128 = 7U, /*!< the number of idle characters. */
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} lpuart_idle_config_t;
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/*!
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* @brief LPUART interrupt configuration structure, default settings all disabled.
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*
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* This structure contains the settings for all LPUART interrupt configurations.
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*/
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enum _lpuart_interrupt_enable
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{
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#if defined(FSL_FEATURE_LPUART_HAS_LIN_BREAK_DETECT) && FSL_FEATURE_LPUART_HAS_LIN_BREAK_DETECT
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kLPUART_LinBreakInterruptEnable = (LPUART_BAUD_LBKDIE_MASK >> 8), /*!< LIN break detect. */
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#endif
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kLPUART_RxActiveEdgeInterruptEnable = (LPUART_BAUD_RXEDGIE_MASK >> 8), /*!< Receive Active Edge. */
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kLPUART_TxDataRegEmptyInterruptEnable = (LPUART_CTRL_TIE_MASK), /*!< Transmit data register empty. */
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kLPUART_TransmissionCompleteInterruptEnable = (LPUART_CTRL_TCIE_MASK), /*!< Transmission complete. */
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kLPUART_RxDataRegFullInterruptEnable = (LPUART_CTRL_RIE_MASK), /*!< Receiver data register full. */
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kLPUART_IdleLineInterruptEnable = (LPUART_CTRL_ILIE_MASK), /*!< Idle line. */
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kLPUART_RxOverrunInterruptEnable = (LPUART_CTRL_ORIE_MASK), /*!< Receiver Overrun. */
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kLPUART_NoiseErrorInterruptEnable = (LPUART_CTRL_NEIE_MASK), /*!< Noise error flag. */
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kLPUART_FramingErrorInterruptEnable = (LPUART_CTRL_FEIE_MASK), /*!< Framing error flag. */
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kLPUART_ParityErrorInterruptEnable = (LPUART_CTRL_PEIE_MASK), /*!< Parity error flag. */
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#if defined(FSL_FEATURE_LPUART_HAS_FIFO) && FSL_FEATURE_LPUART_HAS_FIFO
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kLPUART_TxFifoOverflowInterruptEnable = (LPUART_FIFO_TXOFE_MASK >> 8), /*!< Transmit FIFO Overflow. */
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kLPUART_RxFifoUnderflowInterruptEnable = (LPUART_FIFO_RXUFE_MASK >> 8), /*!< Receive FIFO Underflow. */
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#endif
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};
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/*!
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* @brief LPUART status flags.
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*
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* This provides constants for the LPUART status flags for use in the LPUART functions.
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*/
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enum _lpuart_flags
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{
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kLPUART_TxDataRegEmptyFlag =
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(LPUART_STAT_TDRE_MASK), /*!< Transmit data register empty flag, sets when transmit buffer is empty */
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kLPUART_TransmissionCompleteFlag =
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(LPUART_STAT_TC_MASK), /*!< Transmission complete flag, sets when transmission activity complete */
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kLPUART_RxDataRegFullFlag =
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(LPUART_STAT_RDRF_MASK), /*!< Receive data register full flag, sets when the receive data buffer is full */
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kLPUART_IdleLineFlag = (LPUART_STAT_IDLE_MASK), /*!< Idle line detect flag, sets when idle line detected */
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kLPUART_RxOverrunFlag = (LPUART_STAT_OR_MASK), /*!< Receive Overrun, sets when new data is received before data is
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read from receive register */
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kLPUART_NoiseErrorFlag = (LPUART_STAT_NF_MASK), /*!< Receive takes 3 samples of each received bit. If any of these
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samples differ, noise flag sets */
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kLPUART_FramingErrorFlag =
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(LPUART_STAT_FE_MASK), /*!< Frame error flag, sets if logic 0 was detected where stop bit expected */
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kLPUART_ParityErrorFlag = (LPUART_STAT_PF_MASK), /*!< If parity enabled, sets upon parity error detection */
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#if defined(FSL_FEATURE_LPUART_HAS_LIN_BREAK_DETECT) && FSL_FEATURE_LPUART_HAS_LIN_BREAK_DETECT
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kLPUART_LinBreakFlag =
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(int)(LPUART_STAT_LBKDIF_MASK), /*!< LIN break detect interrupt flag, sets when LIN break char
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detected and LIN circuit enabled */
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#endif
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kLPUART_RxActiveEdgeFlag =
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(LPUART_STAT_RXEDGIF_MASK), /*!< Receive pin active edge interrupt flag, sets when active edge detected */
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kLPUART_RxActiveFlag =
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(LPUART_STAT_RAF_MASK), /*!< Receiver Active Flag (RAF), sets at beginning of valid start bit */
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#if defined(FSL_FEATURE_LPUART_HAS_ADDRESS_MATCHING) && FSL_FEATURE_LPUART_HAS_ADDRESS_MATCHING
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kLPUART_DataMatch1Flag = LPUART_STAT_MA1F_MASK, /*!< The next character to be read from LPUART_DATA matches MA1*/
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kLPUART_DataMatch2Flag = LPUART_STAT_MA2F_MASK, /*!< The next character to be read from LPUART_DATA matches MA2*/
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#endif
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#if defined(FSL_FEATURE_LPUART_HAS_EXTENDED_DATA_REGISTER_FLAGS) && FSL_FEATURE_LPUART_HAS_EXTENDED_DATA_REGISTER_FLAGS
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kLPUART_NoiseErrorInRxDataRegFlag =
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(LPUART_DATA_NOISY_MASK >> 10), /*!< NOISY bit, sets if noise detected in current data word */
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kLPUART_ParityErrorInRxDataRegFlag =
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(LPUART_DATA_PARITYE_MASK >> 10), /*!< PARITYE bit, sets if noise detected in current data word */
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#endif
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#if defined(FSL_FEATURE_LPUART_HAS_FIFO) && FSL_FEATURE_LPUART_HAS_FIFO
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kLPUART_TxFifoEmptyFlag = (LPUART_FIFO_TXEMPT_MASK >> 16), /*!< TXEMPT bit, sets if transmit buffer is empty */
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kLPUART_RxFifoEmptyFlag = (LPUART_FIFO_RXEMPT_MASK >> 16), /*!< RXEMPT bit, sets if receive buffer is empty */
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kLPUART_TxFifoOverflowFlag =
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(LPUART_FIFO_TXOF_MASK >> 16), /*!< TXOF bit, sets if transmit buffer overflow occurred */
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kLPUART_RxFifoUnderflowFlag =
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(LPUART_FIFO_RXUF_MASK >> 16), /*!< RXUF bit, sets if receive buffer underflow occurred */
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#endif
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};
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/*! @brief LPUART configuration structure. */
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typedef struct _lpuart_config
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{
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uint32_t baudRate_Bps; /*!< LPUART baud rate */
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lpuart_parity_mode_t parityMode; /*!< Parity mode, disabled (default), even, odd */
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lpuart_data_bits_t dataBitsCount; /*!< Data bits count, eight (default), seven */
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bool isMsb; /*!< Data bits order, LSB (default), MSB */
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#if defined(FSL_FEATURE_LPUART_HAS_STOP_BIT_CONFIG_SUPPORT) && FSL_FEATURE_LPUART_HAS_STOP_BIT_CONFIG_SUPPORT
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lpuart_stop_bit_count_t stopBitCount; /*!< Number of stop bits, 1 stop bit (default) or 2 stop bits */
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#endif
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#if defined(FSL_FEATURE_LPUART_HAS_FIFO) && FSL_FEATURE_LPUART_HAS_FIFO
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uint8_t txFifoWatermark; /*!< TX FIFO watermark */
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uint8_t rxFifoWatermark; /*!< RX FIFO watermark */
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#endif
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#if defined(FSL_FEATURE_LPUART_HAS_MODEM_SUPPORT) && FSL_FEATURE_LPUART_HAS_MODEM_SUPPORT
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bool enableRxRTS; /*!< RX RTS enable */
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bool enableTxCTS; /*!< TX CTS enable */
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lpuart_transmit_cts_source_t txCtsSource; /*!< TX CTS source */
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lpuart_transmit_cts_config_t txCtsConfig; /*!< TX CTS configure */
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#endif
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lpuart_idle_type_select_t rxIdleType; /*!< RX IDLE type. */
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lpuart_idle_config_t rxIdleConfig; /*!< RX IDLE configuration. */
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bool enableTx; /*!< Enable TX */
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bool enableRx; /*!< Enable RX */
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} lpuart_config_t;
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/*! @brief LPUART transfer structure. */
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typedef struct _lpuart_transfer
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{
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uint8_t *data; /*!< The buffer of data to be transfer.*/
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size_t dataSize; /*!< The byte count to be transfer. */
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} lpuart_transfer_t;
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/* Forward declaration of the handle typedef. */
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typedef struct _lpuart_handle lpuart_handle_t;
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/*! @brief LPUART transfer callback function. */
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typedef void (*lpuart_transfer_callback_t)(LPUART_Type *base, lpuart_handle_t *handle, status_t status, void *userData);
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/*! @brief LPUART handle structure. */
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struct _lpuart_handle
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{
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uint8_t *volatile txData; /*!< Address of remaining data to send. */
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volatile size_t txDataSize; /*!< Size of the remaining data to send. */
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size_t txDataSizeAll; /*!< Size of the data to send out. */
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uint8_t *volatile rxData; /*!< Address of remaining data to receive. */
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volatile size_t rxDataSize; /*!< Size of the remaining data to receive. */
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size_t rxDataSizeAll; /*!< Size of the data to receive. */
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uint8_t *rxRingBuffer; /*!< Start address of the receiver ring buffer. */
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size_t rxRingBufferSize; /*!< Size of the ring buffer. */
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volatile uint16_t rxRingBufferHead; /*!< Index for the driver to store received data into ring buffer. */
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volatile uint16_t rxRingBufferTail; /*!< Index for the user to get data from the ring buffer. */
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lpuart_transfer_callback_t callback; /*!< Callback function. */
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void *userData; /*!< LPUART callback function parameter.*/
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volatile uint8_t txState; /*!< TX transfer state. */
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volatile uint8_t rxState; /*!< RX transfer state. */
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#if defined(FSL_FEATURE_LPUART_HAS_7BIT_DATA_SUPPORT) && FSL_FEATURE_LPUART_HAS_7BIT_DATA_SUPPORT
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bool isSevenDataBits; /*!< Seven data bits flag. */
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#endif
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};
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/*******************************************************************************
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* API
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******************************************************************************/
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#if defined(__cplusplus)
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extern "C" {
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#endif /* _cplusplus */
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#if defined(FSL_FEATURE_LPUART_HAS_GLOBAL) && FSL_FEATURE_LPUART_HAS_GLOBAL
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/*!
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* @name Software Reset
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* @{
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*/
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/*!
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* @brief Resets the LPUART using software.
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*
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* This function resets all internal logic and registers except the Global Register.
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* Remains set until cleared by software.
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*
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* @param base LPUART peripheral base address.
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*/
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static inline void LPUART_SoftwareReset(LPUART_Type *base)
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{
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base->GLOBAL |= LPUART_GLOBAL_RST_MASK;
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base->GLOBAL &= ~LPUART_GLOBAL_RST_MASK;
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}
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/* @} */
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#endif /*FSL_FEATURE_LPUART_HAS_GLOBAL*/
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/*!
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* @name Initialization and deinitialization
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* @{
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*/
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/*!
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* @brief Initializes an LPUART instance with the user configuration structure and the peripheral clock.
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*
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* This function configures the LPUART module with user-defined settings. Call the LPUART_GetDefaultConfig() function
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* to configure the configuration structure and get the default configuration.
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* The example below shows how to use this API to configure the LPUART.
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* @code
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* lpuart_config_t lpuartConfig;
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* lpuartConfig.baudRate_Bps = 115200U;
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* lpuartConfig.parityMode = kLPUART_ParityDisabled;
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* lpuartConfig.dataBitsCount = kLPUART_EightDataBits;
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* lpuartConfig.isMsb = false;
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* lpuartConfig.stopBitCount = kLPUART_OneStopBit;
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* lpuartConfig.txFifoWatermark = 0;
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* lpuartConfig.rxFifoWatermark = 1;
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* LPUART_Init(LPUART1, &lpuartConfig, 20000000U);
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* @endcode
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*
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* @param base LPUART peripheral base address.
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* @param config Pointer to a user-defined configuration structure.
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* @param srcClock_Hz LPUART clock source frequency in HZ.
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* @retval kStatus_LPUART_BaudrateNotSupport Baudrate is not support in current clock source.
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* @retval kStatus_Success LPUART initialize succeed
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*/
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status_t LPUART_Init(LPUART_Type *base, const lpuart_config_t *config, uint32_t srcClock_Hz);
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/*!
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* @brief Deinitializes a LPUART instance.
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*
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* This function waits for transmit to complete, disables TX and RX, and disables the LPUART clock.
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*
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* @param base LPUART peripheral base address.
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*/
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void LPUART_Deinit(LPUART_Type *base);
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/*!
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* @brief Gets the default configuration structure.
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*
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* This function initializes the LPUART configuration structure to a default value. The default
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* values are:
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* lpuartConfig->baudRate_Bps = 115200U;
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* lpuartConfig->parityMode = kLPUART_ParityDisabled;
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* lpuartConfig->dataBitsCount = kLPUART_EightDataBits;
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* lpuartConfig->isMsb = false;
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* lpuartConfig->stopBitCount = kLPUART_OneStopBit;
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* lpuartConfig->txFifoWatermark = 0;
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* lpuartConfig->rxFifoWatermark = 1;
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* lpuartConfig->rxIdleType = kLPUART_IdleTypeStartBit;
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* lpuartConfig->rxIdleConfig = kLPUART_IdleCharacter1;
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* lpuartConfig->enableTx = false;
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* lpuartConfig->enableRx = false;
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*
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* @param config Pointer to a configuration structure.
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*/
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void LPUART_GetDefaultConfig(lpuart_config_t *config);
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/*!
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* @brief Sets the LPUART instance baudrate.
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*
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* This function configures the LPUART module baudrate. This function is used to update
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* the LPUART module baudrate after the LPUART module is initialized by the LPUART_Init.
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* @code
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* LPUART_SetBaudRate(LPUART1, 115200U, 20000000U);
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* @endcode
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*
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* @param base LPUART peripheral base address.
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* @param baudRate_Bps LPUART baudrate to be set.
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* @param srcClock_Hz LPUART clock source frequency in HZ.
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* @retval kStatus_LPUART_BaudrateNotSupport Baudrate is not supported in the current clock source.
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* @retval kStatus_Success Set baudrate succeeded.
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*/
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status_t LPUART_SetBaudRate(LPUART_Type *base, uint32_t baudRate_Bps, uint32_t srcClock_Hz);
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/* @} */
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/*!
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* @name Status
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* @{
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*/
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/*!
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* @brief Gets LPUART status flags.
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*
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* This function gets all LPUART status flags. The flags are returned as the logical
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* OR value of the enumerators @ref _lpuart_flags. To check for a specific status,
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* compare the return value with enumerators in the @ref _lpuart_flags.
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* For example, to check whether the TX is empty:
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* @code
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* if (kLPUART_TxDataRegEmptyFlag & LPUART_GetStatusFlags(LPUART1))
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* {
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* ...
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* }
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* @endcode
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*
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* @param base LPUART peripheral base address.
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* @return LPUART status flags which are ORed by the enumerators in the _lpuart_flags.
|
|
*/
|
|
uint32_t LPUART_GetStatusFlags(LPUART_Type *base);
|
|
|
|
/*!
|
|
* @brief Clears status flags with a provided mask.
|
|
*
|
|
* This function clears LPUART status flags with a provided mask. Automatically cleared flags
|
|
* can't be cleared by this function.
|
|
* Flags that can only cleared or set by hardware are:
|
|
* kLPUART_TxDataRegEmptyFlag, kLPUART_TransmissionCompleteFlag, kLPUART_RxDataRegFullFlag,
|
|
* kLPUART_RxActiveFlag, kLPUART_NoiseErrorInRxDataRegFlag, kLPUART_ParityErrorInRxDataRegFlag,
|
|
* kLPUART_TxFifoEmptyFlag,kLPUART_RxFifoEmptyFlag
|
|
* Note: This API should be called when the Tx/Rx is idle, otherwise it takes no effects.
|
|
*
|
|
* @param base LPUART peripheral base address.
|
|
* @param mask the status flags to be cleared. The user can use the enumerators in the
|
|
* _lpuart_status_flag_t to do the OR operation and get the mask.
|
|
* @return 0 succeed, others failed.
|
|
* @retval kStatus_LPUART_FlagCannotClearManually The flag can't be cleared by this function but
|
|
* it is cleared automatically by hardware.
|
|
* @retval kStatus_Success Status in the mask are cleared.
|
|
*/
|
|
status_t LPUART_ClearStatusFlags(LPUART_Type *base, uint32_t mask);
|
|
|
|
/* @} */
|
|
|
|
/*!
|
|
* @name Interrupts
|
|
* @{
|
|
*/
|
|
|
|
/*!
|
|
* @brief Enables LPUART interrupts according to a provided mask.
|
|
*
|
|
* This function enables the LPUART interrupts according to a provided mask. The mask
|
|
* is a logical OR of enumeration members. See the @ref _lpuart_interrupt_enable.
|
|
* This examples shows how to enable TX empty interrupt and RX full interrupt:
|
|
* @code
|
|
* LPUART_EnableInterrupts(LPUART1,kLPUART_TxDataRegEmptyInterruptEnable | kLPUART_RxDataRegFullInterruptEnable);
|
|
* @endcode
|
|
*
|
|
* @param base LPUART peripheral base address.
|
|
* @param mask The interrupts to enable. Logical OR of @ref _uart_interrupt_enable.
|
|
*/
|
|
void LPUART_EnableInterrupts(LPUART_Type *base, uint32_t mask);
|
|
|
|
/*!
|
|
* @brief Disables LPUART interrupts according to a provided mask.
|
|
*
|
|
* This function disables the LPUART interrupts according to a provided mask. The mask
|
|
* is a logical OR of enumeration members. See @ref _lpuart_interrupt_enable.
|
|
* This example shows how to disable the TX empty interrupt and RX full interrupt:
|
|
* @code
|
|
* LPUART_DisableInterrupts(LPUART1,kLPUART_TxDataRegEmptyInterruptEnable | kLPUART_RxDataRegFullInterruptEnable);
|
|
* @endcode
|
|
*
|
|
* @param base LPUART peripheral base address.
|
|
* @param mask The interrupts to disable. Logical OR of @ref _lpuart_interrupt_enable.
|
|
*/
|
|
void LPUART_DisableInterrupts(LPUART_Type *base, uint32_t mask);
|
|
|
|
/*!
|
|
* @brief Gets enabled LPUART interrupts.
|
|
*
|
|
* This function gets the enabled LPUART interrupts. The enabled interrupts are returned
|
|
* as the logical OR value of the enumerators @ref _lpuart_interrupt_enable. To check
|
|
* a specific interrupt enable status, compare the return value with enumerators
|
|
* in @ref _lpuart_interrupt_enable.
|
|
* For example, to check whether the TX empty interrupt is enabled:
|
|
* @code
|
|
* uint32_t enabledInterrupts = LPUART_GetEnabledInterrupts(LPUART1);
|
|
*
|
|
* if (kLPUART_TxDataRegEmptyInterruptEnable & enabledInterrupts)
|
|
* {
|
|
* ...
|
|
* }
|
|
* @endcode
|
|
*
|
|
* @param base LPUART peripheral base address.
|
|
* @return LPUART interrupt flags which are logical OR of the enumerators in @ref _lpuart_interrupt_enable.
|
|
*/
|
|
uint32_t LPUART_GetEnabledInterrupts(LPUART_Type *base);
|
|
|
|
#if defined(FSL_FEATURE_LPUART_HAS_DMA_ENABLE) && FSL_FEATURE_LPUART_HAS_DMA_ENABLE
|
|
/*!
|
|
* @brief Gets the LPUART data register address.
|
|
*
|
|
* This function returns the LPUART data register address, which is mainly used by the DMA/eDMA.
|
|
*
|
|
* @param base LPUART peripheral base address.
|
|
* @return LPUART data register addresses which are used both by the transmitter and receiver.
|
|
*/
|
|
static inline uint32_t LPUART_GetDataRegisterAddress(LPUART_Type *base)
|
|
{
|
|
return (uint32_t) & (base->DATA);
|
|
}
|
|
|
|
/*!
|
|
* @brief Enables or disables the LPUART transmitter DMA request.
|
|
*
|
|
* This function enables or disables the transmit data register empty flag, STAT[TDRE], to generate DMA requests.
|
|
*
|
|
* @param base LPUART peripheral base address.
|
|
* @param enable True to enable, false to disable.
|
|
*/
|
|
static inline void LPUART_EnableTxDMA(LPUART_Type *base, bool enable)
|
|
{
|
|
if (enable)
|
|
{
|
|
base->BAUD |= LPUART_BAUD_TDMAE_MASK;
|
|
}
|
|
else
|
|
{
|
|
base->BAUD &= ~LPUART_BAUD_TDMAE_MASK;
|
|
}
|
|
}
|
|
|
|
/*!
|
|
* @brief Enables or disables the LPUART receiver DMA.
|
|
*
|
|
* This function enables or disables the receiver data register full flag, STAT[RDRF], to generate DMA requests.
|
|
*
|
|
* @param base LPUART peripheral base address.
|
|
* @param enable True to enable, false to disable.
|
|
*/
|
|
static inline void LPUART_EnableRxDMA(LPUART_Type *base, bool enable)
|
|
{
|
|
if (enable)
|
|
{
|
|
base->BAUD |= LPUART_BAUD_RDMAE_MASK;
|
|
}
|
|
else
|
|
{
|
|
base->BAUD &= ~LPUART_BAUD_RDMAE_MASK;
|
|
}
|
|
}
|
|
|
|
/* @} */
|
|
#endif /* FSL_FEATURE_LPUART_HAS_DMA_ENABLE */
|
|
|
|
/*!
|
|
* @name Bus Operations
|
|
* @{
|
|
*/
|
|
|
|
/*!
|
|
* @brief Get the LPUART instance from peripheral base address.
|
|
*
|
|
* @param base LPUART peripheral base address.
|
|
* @return LPUART instance.
|
|
*/
|
|
uint32_t LPUART_GetInstance(LPUART_Type *base);
|
|
|
|
/*!
|
|
* @brief Enables or disables the LPUART transmitter.
|
|
*
|
|
* This function enables or disables the LPUART transmitter.
|
|
*
|
|
* @param base LPUART peripheral base address.
|
|
* @param enable True to enable, false to disable.
|
|
*/
|
|
static inline void LPUART_EnableTx(LPUART_Type *base, bool enable)
|
|
{
|
|
if (enable)
|
|
{
|
|
base->CTRL |= LPUART_CTRL_TE_MASK;
|
|
}
|
|
else
|
|
{
|
|
base->CTRL &= ~LPUART_CTRL_TE_MASK;
|
|
}
|
|
}
|
|
|
|
/*!
|
|
* @brief Enables or disables the LPUART receiver.
|
|
*
|
|
* This function enables or disables the LPUART receiver.
|
|
*
|
|
* @param base LPUART peripheral base address.
|
|
* @param enable True to enable, false to disable.
|
|
*/
|
|
static inline void LPUART_EnableRx(LPUART_Type *base, bool enable)
|
|
{
|
|
if (enable)
|
|
{
|
|
base->CTRL |= LPUART_CTRL_RE_MASK;
|
|
}
|
|
else
|
|
{
|
|
base->CTRL &= ~LPUART_CTRL_RE_MASK;
|
|
}
|
|
}
|
|
|
|
/*!
|
|
* @brief Writes to the transmitter register.
|
|
*
|
|
* This function writes data to the transmitter register directly. The upper layer must
|
|
* ensure that the TX register is empty or that the TX FIFO has room before calling this function.
|
|
*
|
|
* @param base LPUART peripheral base address.
|
|
* @param data Data write to the TX register.
|
|
*/
|
|
static inline void LPUART_WriteByte(LPUART_Type *base, uint8_t data)
|
|
{
|
|
base->DATA = data;
|
|
}
|
|
|
|
/*!
|
|
* @brief Reads the receiver register.
|
|
*
|
|
* This function reads data from the receiver register directly. The upper layer must
|
|
* ensure that the receiver register is full or that the RX FIFO has data before calling this function.
|
|
*
|
|
* @param base LPUART peripheral base address.
|
|
* @return Data read from data register.
|
|
*/
|
|
static inline uint8_t LPUART_ReadByte(LPUART_Type *base)
|
|
{
|
|
#if defined(FSL_FEATURE_LPUART_HAS_7BIT_DATA_SUPPORT) && FSL_FEATURE_LPUART_HAS_7BIT_DATA_SUPPORT
|
|
uint32_t ctrl = base->CTRL;
|
|
bool isSevenDataBits =
|
|
((ctrl & LPUART_CTRL_M7_MASK) ||
|
|
((!(ctrl & LPUART_CTRL_M7_MASK)) && (!(ctrl & LPUART_CTRL_M_MASK)) && (ctrl & LPUART_CTRL_PE_MASK)));
|
|
|
|
if (isSevenDataBits)
|
|
{
|
|
return (base->DATA & 0x7F);
|
|
}
|
|
else
|
|
{
|
|
return base->DATA;
|
|
}
|
|
#else
|
|
return base->DATA;
|
|
#endif
|
|
}
|
|
|
|
/*!
|
|
* @brief Writes to the transmitter register using a blocking method.
|
|
*
|
|
* This function polls the transmitter register, waits for the register to be empty or for TX FIFO to have
|
|
* room, and writes data to the transmitter buffer.
|
|
*
|
|
* @note This function does not check whether all data has been sent out to the bus.
|
|
* Before disabling the transmitter, check the kLPUART_TransmissionCompleteFlag to ensure that the transmit is
|
|
* finished.
|
|
*
|
|
* @param base LPUART peripheral base address.
|
|
* @param data Start address of the data to write.
|
|
* @param length Size of the data to write.
|
|
*/
|
|
void LPUART_WriteBlocking(LPUART_Type *base, const uint8_t *data, size_t length);
|
|
|
|
/*!
|
|
* @brief Reads the receiver data register using a blocking method.
|
|
*
|
|
* This function polls the receiver register, waits for the receiver register full or receiver FIFO
|
|
* has data, and reads data from the TX register.
|
|
*
|
|
* @param base LPUART peripheral base address.
|
|
* @param data Start address of the buffer to store the received data.
|
|
* @param length Size of the buffer.
|
|
* @retval kStatus_LPUART_RxHardwareOverrun Receiver overrun happened while receiving data.
|
|
* @retval kStatus_LPUART_NoiseError Noise error happened while receiving data.
|
|
* @retval kStatus_LPUART_FramingError Framing error happened while receiving data.
|
|
* @retval kStatus_LPUART_ParityError Parity error happened while receiving data.
|
|
* @retval kStatus_Success Successfully received all data.
|
|
*/
|
|
status_t LPUART_ReadBlocking(LPUART_Type *base, uint8_t *data, size_t length);
|
|
|
|
/* @} */
|
|
|
|
/*!
|
|
* @name Transactional
|
|
* @{
|
|
*/
|
|
|
|
/*!
|
|
* @brief Initializes the LPUART handle.
|
|
*
|
|
* This function initializes the LPUART handle, which can be used for other LPUART
|
|
* transactional APIs. Usually, for a specified LPUART instance,
|
|
* call this API once to get the initialized handle.
|
|
*
|
|
* The LPUART driver supports the "background" receiving, which means that user can set up
|
|
* an RX ring buffer optionally. Data received is stored into the ring buffer even when the
|
|
* user doesn't call the LPUART_TransferReceiveNonBlocking() API. If there is already data received
|
|
* in the ring buffer, the user can get the received data from the ring buffer directly.
|
|
* The ring buffer is disabled if passing NULL as @p ringBuffer.
|
|
*
|
|
* @param base LPUART peripheral base address.
|
|
* @param handle LPUART handle pointer.
|
|
* @param callback Callback function.
|
|
* @param userData User data.
|
|
*/
|
|
void LPUART_TransferCreateHandle(LPUART_Type *base,
|
|
lpuart_handle_t *handle,
|
|
lpuart_transfer_callback_t callback,
|
|
void *userData);
|
|
/*!
|
|
* @brief Transmits a buffer of data using the interrupt method.
|
|
*
|
|
* This function send data using an interrupt method. This is a non-blocking function, which
|
|
* returns directly without waiting for all data written to the transmitter register. When
|
|
* all data is written to the TX register in the ISR, the LPUART driver calls the callback
|
|
* function and passes the @ref kStatus_LPUART_TxIdle as status parameter.
|
|
*
|
|
* @note The kStatus_LPUART_TxIdle is passed to the upper layer when all data are written
|
|
* to the TX register. However, there is no check to ensure that all the data sent out. Before disabling the TX,
|
|
* check the kLPUART_TransmissionCompleteFlag to ensure that the transmit is finished.
|
|
*
|
|
* @param base LPUART peripheral base address.
|
|
* @param handle LPUART handle pointer.
|
|
* @param xfer LPUART transfer structure, see #lpuart_transfer_t.
|
|
* @retval kStatus_Success Successfully start the data transmission.
|
|
* @retval kStatus_LPUART_TxBusy Previous transmission still not finished, data not all written to the TX register.
|
|
* @retval kStatus_InvalidArgument Invalid argument.
|
|
*/
|
|
status_t LPUART_TransferSendNonBlocking(LPUART_Type *base, lpuart_handle_t *handle, lpuart_transfer_t *xfer);
|
|
|
|
/*!
|
|
* @brief Sets up the RX ring buffer.
|
|
*
|
|
* This function sets up the RX ring buffer to a specific UART handle.
|
|
*
|
|
* When the RX ring buffer is used, data received is stored into the ring buffer even when
|
|
* the user doesn't call the UART_TransferReceiveNonBlocking() API. If there is already data received
|
|
* in the ring buffer, the user can get the received data from the ring buffer directly.
|
|
*
|
|
* @note When using RX ring buffer, one byte is reserved for internal use. In other
|
|
* words, if @p ringBufferSize is 32, then only 31 bytes are used for saving data.
|
|
*
|
|
* @param base LPUART peripheral base address.
|
|
* @param handle LPUART handle pointer.
|
|
* @param ringBuffer Start address of ring buffer for background receiving. Pass NULL to disable the ring buffer.
|
|
* @param ringBufferSize size of the ring buffer.
|
|
*/
|
|
void LPUART_TransferStartRingBuffer(LPUART_Type *base,
|
|
lpuart_handle_t *handle,
|
|
uint8_t *ringBuffer,
|
|
size_t ringBufferSize);
|
|
|
|
/*!
|
|
* @brief Aborts the background transfer and uninstalls the ring buffer.
|
|
*
|
|
* This function aborts the background transfer and uninstalls the ring buffer.
|
|
*
|
|
* @param base LPUART peripheral base address.
|
|
* @param handle LPUART handle pointer.
|
|
*/
|
|
void LPUART_TransferStopRingBuffer(LPUART_Type *base, lpuart_handle_t *handle);
|
|
|
|
/*!
|
|
* @brief Get the length of received data in RX ring buffer.
|
|
*
|
|
* @param handle LPUART handle pointer.
|
|
* @return Length of received data in RX ring buffer.
|
|
*/
|
|
size_t LPUART_TransferGetRxRingBufferLength(LPUART_Type *base, lpuart_handle_t *handle);
|
|
|
|
/*!
|
|
* @brief Aborts the interrupt-driven data transmit.
|
|
*
|
|
* This function aborts the interrupt driven data sending. The user can get the remainBtyes to find out
|
|
* how many bytes are not sent out.
|
|
*
|
|
* @param base LPUART peripheral base address.
|
|
* @param handle LPUART handle pointer.
|
|
*/
|
|
void LPUART_TransferAbortSend(LPUART_Type *base, lpuart_handle_t *handle);
|
|
|
|
/*!
|
|
* @brief Gets the number of bytes that have been written to the LPUART transmitter register.
|
|
*
|
|
* This function gets the number of bytes that have been written to LPUART TX
|
|
* register by an interrupt method.
|
|
*
|
|
* @param base LPUART peripheral base address.
|
|
* @param handle LPUART handle pointer.
|
|
* @param count Send bytes count.
|
|
* @retval kStatus_NoTransferInProgress No send in progress.
|
|
* @retval kStatus_InvalidArgument Parameter is invalid.
|
|
* @retval kStatus_Success Get successfully through the parameter \p count;
|
|
*/
|
|
status_t LPUART_TransferGetSendCount(LPUART_Type *base, lpuart_handle_t *handle, uint32_t *count);
|
|
|
|
/*!
|
|
* @brief Receives a buffer of data using the interrupt method.
|
|
*
|
|
* This function receives data using an interrupt method. This is a non-blocking function
|
|
* which returns without waiting to ensure that all data are received.
|
|
* If the RX ring buffer is used and not empty, the data in the ring buffer is copied and
|
|
* the parameter @p receivedBytes shows how many bytes are copied from the ring buffer.
|
|
* After copying, if the data in the ring buffer is not enough for read, the receive
|
|
* request is saved by the LPUART driver. When the new data arrives, the receive request
|
|
* is serviced first. When all data is received, the LPUART driver notifies the upper layer
|
|
* through a callback function and passes a status parameter @ref kStatus_UART_RxIdle.
|
|
* For example, the upper layer needs 10 bytes but there are only 5 bytes in ring buffer.
|
|
* The 5 bytes are copied to xfer->data, which returns with the
|
|
* parameter @p receivedBytes set to 5. For the remaining 5 bytes, the newly arrived data is
|
|
* saved from xfer->data[5]. When 5 bytes are received, the LPUART driver notifies the upper layer.
|
|
* If the RX ring buffer is not enabled, this function enables the RX and RX interrupt
|
|
* to receive data to xfer->data. When all data is received, the upper layer is notified.
|
|
*
|
|
* @param base LPUART peripheral base address.
|
|
* @param handle LPUART handle pointer.
|
|
* @param xfer LPUART transfer structure, see #uart_transfer_t.
|
|
* @param receivedBytes Bytes received from the ring buffer directly.
|
|
* @retval kStatus_Success Successfully queue the transfer into the transmit queue.
|
|
* @retval kStatus_LPUART_RxBusy Previous receive request is not finished.
|
|
* @retval kStatus_InvalidArgument Invalid argument.
|
|
*/
|
|
status_t LPUART_TransferReceiveNonBlocking(LPUART_Type *base,
|
|
lpuart_handle_t *handle,
|
|
lpuart_transfer_t *xfer,
|
|
size_t *receivedBytes);
|
|
|
|
/*!
|
|
* @brief Aborts the interrupt-driven data receiving.
|
|
*
|
|
* This function aborts the interrupt-driven data receiving. The user can get the remainBytes to find out
|
|
* how many bytes not received yet.
|
|
*
|
|
* @param base LPUART peripheral base address.
|
|
* @param handle LPUART handle pointer.
|
|
*/
|
|
void LPUART_TransferAbortReceive(LPUART_Type *base, lpuart_handle_t *handle);
|
|
|
|
/*!
|
|
* @brief Gets the number of bytes that have been received.
|
|
*
|
|
* This function gets the number of bytes that have been received.
|
|
*
|
|
* @param base LPUART peripheral base address.
|
|
* @param handle LPUART handle pointer.
|
|
* @param count Receive bytes count.
|
|
* @retval kStatus_NoTransferInProgress No receive in progress.
|
|
* @retval kStatus_InvalidArgument Parameter is invalid.
|
|
* @retval kStatus_Success Get successfully through the parameter \p count;
|
|
*/
|
|
status_t LPUART_TransferGetReceiveCount(LPUART_Type *base, lpuart_handle_t *handle, uint32_t *count);
|
|
|
|
/*!
|
|
* @brief LPUART IRQ handle function.
|
|
*
|
|
* This function handles the LPUART transmit and receive IRQ request.
|
|
*
|
|
* @param base LPUART peripheral base address.
|
|
* @param handle LPUART handle pointer.
|
|
*/
|
|
void LPUART_TransferHandleIRQ(LPUART_Type *base, lpuart_handle_t *handle);
|
|
|
|
/*!
|
|
* @brief LPUART Error IRQ handle function.
|
|
*
|
|
* This function handles the LPUART error IRQ request.
|
|
*
|
|
* @param base LPUART peripheral base address.
|
|
* @param handle LPUART handle pointer.
|
|
*/
|
|
void LPUART_TransferHandleErrorIRQ(LPUART_Type *base, lpuart_handle_t *handle);
|
|
|
|
/* @} */
|
|
|
|
#if defined(__cplusplus)
|
|
}
|
|
#endif
|
|
|
|
/*! @}*/
|
|
|
|
#endif /* _FSL_LPUART_H_ */
|