796 lines
31 KiB
C
796 lines
31 KiB
C
/*
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* Copyright 2017-2021 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_USART_H_
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#define _FSL_USART_H_
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#include "fsl_common.h"
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/*!
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* @addtogroup usart_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 USART driver version. */
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#define FSL_USART_DRIVER_VERSION (MAKE_VERSION(2, 4, 0))
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/*@}*/
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/*! @brief Macro gate for enable transaction API. 1 for enable, 0 for disable. */
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#ifndef FSL_SDK_ENABLE_USART_DRIVER_TRANSACTIONAL_APIS
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#define FSL_SDK_ENABLE_USART_DRIVER_TRANSACTIONAL_APIS 1
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#endif
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/*! @brief USART baud rate auto generate switch gate. 1 for enable, 0 for disable*/
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#ifndef FSL_SDK_USART_DRIVER_ENABLE_BAUDRATE_AUTO_GENERATE
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#define FSL_SDK_USART_DRIVER_ENABLE_BAUDRATE_AUTO_GENERATE 1
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#endif /* FSL_SDK_USART_DRIVER_ENABLE_BAUDRATE_AUTO_GENERATE */
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#if !(defined(FSL_SDK_USART_DRIVER_ENABLE_BAUDRATE_AUTO_GENERATE) && FSL_SDK_USART_DRIVER_ENABLE_BAUDRATE_AUTO_GENERATE)
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/*! @brief Macro for generating baud rate manually.
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* <pre>
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* Table of common register values for generating baud rate in specific USART clock frequency.
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* Target baud rate(Hz) | USART clock frequency(Hz) | OSR value | BRG value |
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* 9600 | 12,000,000 | 10 | 124 |
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* 9600 | 24,000,000 | 10 | 249 |
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* 9600 | 30,000,000 | 16 | 194 |
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* 9600 | 12,000,000 | NO OSR register(16) | 77 |
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* 115200 | 12,000,000 | 13 | 7 |
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* 115200 | 24,000,000 | 16 | 12 |
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* 115200 | 30,000,000 | 13 | 19 |
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* </pre>
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* @note: The formula for generating a baud rate is: baduRate = usartClock_Hz / (OSR * (BRG +1)).
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* For some devices, there is no OSR register for setting, so the default OSR value is 16 in formula.
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* If the USART clock source can not generate a precise baud rate, please setting the FRG register
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* in SYSCON module to get a precise USART clock frequency.
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*/
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/* Macro for setiing OSR register. */
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#ifndef FSL_SDK_USART_OSR_VALUE
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#define FSL_SDK_USART_OSR_VALUE 10U
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#endif /* FSL_SDK_USART_OSR_VALUE */
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/* Macro for setting BRG register. */
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#ifndef FSL_SDK_USART_BRG_VALUE
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#define FSL_SDK_USART_BRG_VALUE 124U
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#endif /* FSL_SDK_USART_BRG_VALUE */
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#endif /* FSL_SDK_USART_DRIVER_ENABLE_BAUDRATE_AUTO_GENERATE */
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/*! @brief Retry times for waiting flag. */
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#ifndef UART_RETRY_TIMES
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#define UART_RETRY_TIMES 0U /*!< Defining to zero means to keep waiting for the flag until it is assert/deassert. */
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#endif
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/*! @brief Error codes for the USART driver. */
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enum
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{
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kStatus_USART_TxBusy = MAKE_STATUS(kStatusGroup_LPC_USART, 0), /*!< Transmitter is busy. */
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kStatus_USART_RxBusy = MAKE_STATUS(kStatusGroup_LPC_USART, 1), /*!< Receiver is busy. */
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kStatus_USART_TxIdle = MAKE_STATUS(kStatusGroup_LPC_USART, 2), /*!< USART transmitter is idle. */
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kStatus_USART_RxIdle = MAKE_STATUS(kStatusGroup_LPC_USART, 3), /*!< USART receiver is idle. */
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kStatus_USART_TxError = MAKE_STATUS(kStatusGroup_LPC_USART, 4), /*!< Error happens on tx. */
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kStatus_USART_RxError = MAKE_STATUS(kStatusGroup_LPC_USART, 5), /*!< Error happens on rx. */
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kStatus_USART_RxRingBufferOverrun = MAKE_STATUS(kStatusGroup_LPC_USART, 6), /*!< Error happens on rx ring buffer */
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kStatus_USART_NoiseError = MAKE_STATUS(kStatusGroup_LPC_USART, 7), /*!< USART noise error. */
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kStatus_USART_FramingError = MAKE_STATUS(kStatusGroup_LPC_USART, 8), /*!< USART framing error. */
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kStatus_USART_ParityError = MAKE_STATUS(kStatusGroup_LPC_USART, 9), /*!< USART parity error. */
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kStatus_USART_HardwareOverrun = MAKE_STATUS(kStatusGroup_LPC_USART, 10), /*!< USART hardware over flow. */
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kStatus_USART_BaudrateNotSupport =
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MAKE_STATUS(kStatusGroup_LPC_USART, 11), /*!< Baudrate is not support in current clock source */
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kStatus_USART_Timeout = MAKE_STATUS(kStatusGroup_LPC_USART, 12), /*!< USART times out. */
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};
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/*! @brief USART parity mode. */
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typedef enum _usart_parity_mode
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{
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kUSART_ParityDisabled = 0x0U, /*!< Parity disabled */
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kUSART_ParityEven = 0x2U, /*!< Parity enabled, type even, bit setting: PARITYSEL = 10 */
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kUSART_ParityOdd = 0x3U, /*!< Parity enabled, type odd, bit setting: PARITYSEL = 11 */
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} usart_parity_mode_t;
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/*! @brief USART synchronous mode. */
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typedef enum _usart_sync_mode
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{
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kUSART_SyncModeDisabled = 0x0U, /*!< Asynchronous mode. */
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kUSART_SyncModeSlave = 0x2U, /*!< Synchronous slave mode. */
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kUSART_SyncModeMaster = 0x3U, /*!< Synchronous master mode. */
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} usart_sync_mode_t;
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/*! @brief USART stop bit count. */
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typedef enum _usart_stop_bit_count
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{
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kUSART_OneStopBit = 0U, /*!< One stop bit */
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kUSART_TwoStopBit = 1U, /*!< Two stop bits */
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} usart_stop_bit_count_t;
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/*! @brief USART data size. */
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typedef enum _usart_data_len
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{
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kUSART_7BitsPerChar = 0U, /*!< Seven bit mode */
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kUSART_8BitsPerChar = 1U, /*!< Eight bit mode */
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} usart_data_len_t;
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/*! @brief USART clock polarity configuration, used in sync mode.*/
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typedef enum _usart_clock_polarity
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{
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kUSART_RxSampleOnFallingEdge = 0x0U, /*!< Un_RXD is sampled on the falling edge of SCLK. */
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kUSART_RxSampleOnRisingEdge = 0x1U, /*!< Un_RXD is sampled on the rising edge of SCLK. */
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} usart_clock_polarity_t;
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/*!
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* @brief USART interrupt configuration structure, default settings all disabled.
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*/
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enum _usart_interrupt_enable
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{
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kUSART_RxReadyInterruptEnable = (USART_INTENSET_RXRDYEN_MASK), /*!< Receive ready interrupt. */
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kUSART_TxReadyInterruptEnable = (USART_INTENSET_TXRDYEN_MASK), /*!< Transmit ready interrupt. */
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#if defined(FSL_FEATURE_USART_HAS_INTENSET_TXIDLEEN) && FSL_FEATURE_USART_HAS_INTENSET_TXIDLEEN
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kUSART_TxIdleInterruptEnable = (USART_INTENSET_TXIDLEEN_MASK), /*!< Transmit idle interrupt. */
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#endif
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kUSART_DeltaCtsInterruptEnable = (USART_INTENSET_DELTACTSEN_MASK), /*!< Cts pin change interrupt. */
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kUSART_TxDisableInterruptEnable = (USART_INTENSET_TXDISEN_MASK), /*!< Transmit disable interrupt. */
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kUSART_HardwareOverRunInterruptEnable = (USART_INTENSET_OVERRUNEN_MASK), /*!< hardware ove run interrupt. */
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kUSART_RxBreakInterruptEnable = (USART_INTENSET_DELTARXBRKEN_MASK), /*!< Receive break interrupt. */
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kUSART_RxStartInterruptEnable = (USART_INTENSET_STARTEN_MASK), /*!< Receive ready interrupt. */
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kUSART_FramErrorInterruptEnable = (USART_INTENSET_FRAMERREN_MASK), /*!< Receive start interrupt. */
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kUSART_ParityErrorInterruptEnable = (USART_INTENSET_PARITYERREN_MASK), /*!< Receive frame error interrupt. */
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kUSART_RxNoiseInterruptEnable = (USART_INTENSET_RXNOISEEN_MASK), /*!< Receive noise error interrupt. */
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#if defined(FSL_FEATURE_USART_HAS_ABERR_CHECK) && FSL_FEATURE_USART_HAS_ABERR_CHECK
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kUSART_AutoBaudErrorInterruptEnable = (USART_INTENSET_ABERREN_MASK), /*!< Receive auto baud error interrupt. */
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#endif
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kUSART_AllInterruptEnable =
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(USART_INTENSET_RXRDYEN_MASK | USART_INTENSET_TXRDYEN_MASK |
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#if defined(FSL_FEATURE_USART_HAS_INTENSET_TXIDLEEN) && FSL_FEATURE_USART_HAS_INTENSET_TXIDLEEN
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USART_INTENSET_TXIDLEEN_MASK |
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#endif
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USART_INTENSET_DELTACTSEN_MASK | USART_INTENSET_TXDISEN_MASK | USART_INTENSET_OVERRUNEN_MASK |
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USART_INTENSET_DELTARXBRKEN_MASK | USART_INTENSET_STARTEN_MASK | USART_INTENSET_FRAMERREN_MASK |
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USART_INTENSET_PARITYERREN_MASK | USART_INTENSET_RXNOISEEN_MASK
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#if defined(FSL_FEATURE_USART_HAS_ABERR_CHECK) && FSL_FEATURE_USART_HAS_ABERR_CHECK
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| USART_INTENSET_ABERREN_MASK
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#endif
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), /*!< All interrupt. */
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};
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/*!
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* @brief USART status flags.
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*
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* This provides constants for the USART status flags for use in the USART functions.
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*/
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enum _usart_flags
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{
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kUSART_RxReady = (USART_STAT_RXRDY_MASK), /*!< Receive ready flag. */
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kUSART_RxIdleFlag = (USART_STAT_RXIDLE_MASK), /*!< Receive IDLE flag. */
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kUSART_TxReady = (USART_STAT_TXRDY_MASK), /*!< Transmit ready flag. */
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kUSART_TxIdleFlag = (USART_STAT_TXIDLE_MASK), /*!< Transmit idle flag. */
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kUSART_CtsState = (USART_STAT_CTS_MASK), /*!< Cts pin status. */
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kUSART_DeltaCtsFlag = (USART_STAT_DELTACTS_MASK), /*!< Cts pin change flag. */
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kUSART_TxDisableFlag = (USART_STAT_TXDISSTAT_MASK), /*!< Transmit disable flag. */
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kUSART_HardwareOverrunFlag = (USART_STAT_OVERRUNINT_MASK), /*!< Hardware over run flag. */
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kUSART_RxBreakFlag = (USART_STAT_DELTARXBRK_MASK), /*!< Receive break flag. */
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kUSART_RxStartFlag = (USART_STAT_START_MASK), /*!< receive start flag. */
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kUSART_FramErrorFlag = (USART_STAT_FRAMERRINT_MASK), /*!< Frame error flag. */
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kUSART_ParityErrorFlag = (USART_STAT_PARITYERRINT_MASK), /*!< Parity error flag. */
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kUSART_RxNoiseFlag = (USART_STAT_RXNOISEINT_MASK), /*!< Receive noise flag. */
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#if defined(FSL_FEATURE_USART_HAS_ABERR_CHECK) && FSL_FEATURE_USART_HAS_ABERR_CHECK
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kUSART_AutoBaudErrorFlag = (USART_STAT_ABERR_MASK), /*!< Auto baud error flag. */
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#endif
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};
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/*! @brief USART configuration structure. */
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typedef struct _usart_config
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{
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uint32_t baudRate_Bps; /*!< USART baud rate */
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bool enableRx; /*!< USART receive enable. */
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bool enableTx; /*!< USART transmit enable. */
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bool loopback; /*!< Enable peripheral loopback */
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bool enableContinuousSCLK; /*!< USART continuous Clock generation enable in synchronous master mode. */
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bool enableHardwareFlowControl; /*!< Enable hardware control RTS/CTS */
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usart_parity_mode_t parityMode; /*!< Parity mode, disabled (default), even, odd */
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usart_stop_bit_count_t stopBitCount; /*!< Number of stop bits, 1 stop bit (default) or 2 stop bits */
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usart_data_len_t bitCountPerChar; /*!< Data length - 7 bit, 8 bit */
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usart_sync_mode_t syncMode; /*!< Transfer mode - asynchronous, synchronous master, synchronous slave. */
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usart_clock_polarity_t clockPolarity; /*!< Selects the clock polarity and sampling edge in sync mode. */
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} usart_config_t;
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#if defined(FSL_SDK_ENABLE_USART_DRIVER_TRANSACTIONAL_APIS) && (FSL_SDK_ENABLE_USART_DRIVER_TRANSACTIONAL_APIS)
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/*! @brief USART transfer structure. */
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typedef struct _usart_transfer
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{
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/*
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* Use separate TX and RX data pointer, because TX data is const data.
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* The member data is kept for backward compatibility.
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*/
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union
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{
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uint8_t *data; /*!< The buffer of data to be transfer.*/
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uint8_t *rxData; /*!< The buffer to receive data. */
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const uint8_t *txData; /*!< The buffer of data to be sent. */
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};
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size_t dataSize; /*!< The byte count to be transfer. */
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} usart_transfer_t;
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/* Forward declaration of the handle typedef. */
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typedef struct _usart_handle usart_handle_t;
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/*! @brief USART transfer callback function. */
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typedef void (*usart_transfer_callback_t)(USART_Type *base, usart_handle_t *handle, status_t status, void *userData);
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/*! @brief USART handle structure. */
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struct _usart_handle
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{
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const 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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usart_transfer_callback_t callback; /*!< Callback function. */
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void *userData; /*!< USART 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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};
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#endif /* FSL_SDK_ENABLE_USART_DRIVER_TRANSACTIONAL_APIS */
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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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/*!
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* @name Get the instance of USART
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* @{
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*/
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/*! @brief Returns instance number for USART peripheral base address. */
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uint32_t USART_GetInstance(USART_Type *base);
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/* @} */
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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 a USART instance with user configuration structure and peripheral clock.
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*
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* This function configures the USART module with the user-defined settings. The user can configure the configuration
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* structure and also get the default configuration by using the USART_GetDefaultConfig() function.
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* Example below shows how to use this API to configure USART.
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* @code
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* usart_config_t usartConfig;
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* usartConfig.baudRate_Bps = 115200U;
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* usartConfig.parityMode = kUSART_ParityDisabled;
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* usartConfig.stopBitCount = kUSART_OneStopBit;
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* USART_Init(USART1, &usartConfig, 20000000U);
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* @endcode
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*
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* @param base USART peripheral base address.
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* @param config Pointer to user-defined configuration structure.
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* @param srcClock_Hz USART clock source frequency in HZ.
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* @retval kStatus_USART_BaudrateNotSupport Baudrate is not support in current clock source.
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* @retval kStatus_InvalidArgument USART base address is not valid
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* @retval kStatus_Success Status USART initialize succeed
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*/
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status_t USART_Init(USART_Type *base, const usart_config_t *config, uint32_t srcClock_Hz);
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/*!
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* @brief Deinitializes a USART instance.
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*
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* This function waits for TX complete, disables the USART clock.
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*
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* @param base USART peripheral base address.
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*/
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void USART_Deinit(USART_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 USART configuration structure to a default value. The default
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* values are:
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* usartConfig->baudRate_Bps = 9600U;
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* usartConfig->parityMode = kUSART_ParityDisabled;
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* usartConfig->stopBitCount = kUSART_OneStopBit;
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* usartConfig->bitCountPerChar = kUSART_8BitsPerChar;
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* usartConfig->loopback = false;
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* usartConfig->enableTx = false;
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* usartConfig->enableRx = false;
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* ...
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* @param config Pointer to configuration structure.
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*/
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void USART_GetDefaultConfig(usart_config_t *config);
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/*!
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* @brief Sets the USART instance baud rate.
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*
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* This function configures the USART module baud rate. This function is used to update
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* the USART module baud rate after the USART module is initialized by the USART_Init.
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* @code
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* USART_SetBaudRate(USART1, 115200U, 20000000U);
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* @endcode
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*
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* @param base USART peripheral base address.
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* @param baudrate_Bps USART baudrate to be set.
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* @param srcClock_Hz USART clock source frequency in HZ.
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* @retval kStatus_USART_BaudrateNotSupport Baudrate is not support in current clock source.
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* @retval kStatus_Success Set baudrate succeed.
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* @retval kStatus_InvalidArgument One or more arguments are invalid.
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*/
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status_t USART_SetBaudRate(USART_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 Get USART status flags.
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*
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* This function get all USART status flags, the flags are returned as the logical
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* OR value of the enumerators @ref _usart_flags. To check a specific status,
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* compare the return value with enumerators in @ref _usart_flags.
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* For example, to check whether the RX is ready:
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* @code
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* if (kUSART_RxReady & USART_GetStatusFlags(USART1))
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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 USART peripheral base address.
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* @return USART status flags which are ORed by the enumerators in the _usart_flags.
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*/
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static inline uint32_t USART_GetStatusFlags(USART_Type *base)
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{
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return base->STAT;
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}
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/*!
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* @brief Clear USART status flags.
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*
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* This function clear supported USART status flags
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* For example:
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* @code
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* USART_ClearStatusFlags(USART1, kUSART_HardwareOverrunFlag)
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* @endcode
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*
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* @param base USART peripheral base address.
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* @param mask status flags to be cleared.
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*/
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static inline void USART_ClearStatusFlags(USART_Type *base, uint32_t mask)
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{
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base->STAT = mask;
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}
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/* @} */
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/*!
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* @name Interrupts
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* @{
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*/
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/*!
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* @brief Enables USART interrupts according to the provided mask.
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*
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* This function enables the USART interrupts according to the provided mask. The mask
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* is a logical OR of enumeration members. See @ref _usart_interrupt_enable.
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* For example, to enable TX ready interrupt and RX ready interrupt:
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* @code
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* USART_EnableInterrupts(USART1, kUSART_RxReadyInterruptEnable | kUSART_TxReadyInterruptEnable);
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* @endcode
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*
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* @param base USART peripheral base address.
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* @param mask The interrupts to enable. Logical OR of @ref _usart_interrupt_enable.
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*/
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static inline void USART_EnableInterrupts(USART_Type *base, uint32_t mask)
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{
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base->INTENSET = mask & 0x0001FFFFU;
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|
}
|
|
|
|
/*!
|
|
* @brief Disables USART interrupts according to a provided mask.
|
|
*
|
|
* This function disables the USART interrupts according to a provided mask. The mask
|
|
* is a logical OR of enumeration members. See @ref _usart_interrupt_enable.
|
|
* This example shows how to disable the TX ready interrupt and RX ready interrupt:
|
|
* @code
|
|
* USART_DisableInterrupts(USART1, kUSART_TxReadyInterruptEnable | kUSART_RxReadyInterruptEnable);
|
|
* @endcode
|
|
*
|
|
* @param base USART peripheral base address.
|
|
* @param mask The interrupts to disable. Logical OR of @ref _usart_interrupt_enable.
|
|
*/
|
|
static inline void USART_DisableInterrupts(USART_Type *base, uint32_t mask)
|
|
{
|
|
base->INTENCLR = mask & 0x0001FFFFU;
|
|
}
|
|
|
|
/*!
|
|
* @brief Returns enabled USART interrupts.
|
|
*
|
|
* This function returns the enabled USART interrupts.
|
|
*
|
|
* @param base USART peripheral base address.
|
|
*/
|
|
static inline uint32_t USART_GetEnabledInterrupts(USART_Type *base)
|
|
{
|
|
return base->INTENSET;
|
|
}
|
|
/* @} */
|
|
|
|
/*!
|
|
* @name Bus Operations
|
|
* @{
|
|
*/
|
|
|
|
/*!
|
|
* @brief Continuous Clock generation.
|
|
* By default, SCLK is only output while data is being transmitted in synchronous mode.
|
|
* Enable this funciton, SCLK will run continuously in synchronous mode, allowing
|
|
* characters to be received on Un_RxD independently from transmission on Un_TXD).
|
|
*
|
|
* @param base USART peripheral base address.
|
|
* @param enable Enable Continuous Clock generation mode or not, true for enable and false for disable.
|
|
*/
|
|
static inline void USART_EnableContinuousSCLK(USART_Type *base, bool enable)
|
|
{
|
|
if (enable)
|
|
{
|
|
base->CTL |= USART_CTL_CC_MASK;
|
|
}
|
|
else
|
|
{
|
|
base->CTL &= ~USART_CTL_CC_MASK;
|
|
}
|
|
}
|
|
|
|
/*!
|
|
* @brief Enable Continuous Clock generation bit auto clear.
|
|
* While enable this cuntion, the Continuous Clock bit is automatically cleared when a complete
|
|
* character has been received. This bit is cleared at the same time.
|
|
*
|
|
* @param base USART peripheral base address.
|
|
* @param enable Enable auto clear or not, true for enable and false for disable.
|
|
*/
|
|
static inline void USART_EnableAutoClearSCLK(USART_Type *base, bool enable)
|
|
{
|
|
if (enable)
|
|
{
|
|
base->CTL |= USART_CTL_CLRCCONRX_MASK;
|
|
}
|
|
else
|
|
{
|
|
base->CTL &= ~USART_CTL_CLRCCONRX_MASK;
|
|
}
|
|
}
|
|
|
|
/*!
|
|
* @brief Enable CTS.
|
|
* This function will determine whether CTS is used for flow control.
|
|
*
|
|
* @param base USART peripheral base address.
|
|
* @param enable Enable CTS or not, true for enable and false for disable.
|
|
*/
|
|
static inline void USART_EnableCTS(USART_Type *base, bool enable)
|
|
{
|
|
if (enable)
|
|
{
|
|
base->CFG |= USART_CFG_CTSEN_MASK;
|
|
}
|
|
else
|
|
{
|
|
base->CFG &= ~USART_CFG_CTSEN_MASK;
|
|
}
|
|
}
|
|
|
|
/*!
|
|
* @brief Enable the USART transmit.
|
|
*
|
|
* This function will enable or disable the USART transmit.
|
|
*
|
|
* @param base USART peripheral base address.
|
|
* @param enable true for enable and false for disable.
|
|
*/
|
|
static inline void USART_EnableTx(USART_Type *base, bool enable)
|
|
{
|
|
if (enable)
|
|
{
|
|
/* Make sure the USART module is enabled. */
|
|
base->CFG |= USART_CFG_ENABLE_MASK;
|
|
base->CTL &= ~USART_CTL_TXDIS_MASK;
|
|
}
|
|
else
|
|
{
|
|
base->CTL |= USART_CTL_TXDIS_MASK;
|
|
}
|
|
}
|
|
|
|
/*!
|
|
* @brief Enable the USART receive.
|
|
*
|
|
* This function will enable or disable the USART receive.
|
|
* Note: if the transmit is enabled, the receive will not be disabled.
|
|
* @param base USART peripheral base address.
|
|
* @param enable true for enable and false for disable.
|
|
*/
|
|
static inline void USART_EnableRx(USART_Type *base, bool enable)
|
|
{
|
|
if (enable)
|
|
{
|
|
/* Make sure the USART module is enabled. */
|
|
base->CFG |= USART_CFG_ENABLE_MASK;
|
|
}
|
|
else
|
|
{
|
|
/* If the transmit is disabled too. */
|
|
if ((base->CTL & USART_CTL_TXDIS_MASK) != 0U)
|
|
{
|
|
base->CFG &= ~USART_CFG_ENABLE_MASK;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*!
|
|
* @brief Writes to the TXDAT register.
|
|
*
|
|
* This function will writes data to the TXDAT automatly.The upper layer must ensure
|
|
* that TXDATA has space for data to write before calling this function.
|
|
*
|
|
* @param base USART peripheral base address.
|
|
* @param data The byte to write.
|
|
*/
|
|
static inline void USART_WriteByte(USART_Type *base, uint8_t data)
|
|
{
|
|
base->TXDAT = data;
|
|
}
|
|
|
|
/*!
|
|
* @brief Reads the RXDAT directly.
|
|
*
|
|
* This function reads data from the RXDAT automatly. The upper layer must
|
|
* ensure that the RXDAT is not empty before calling this function.
|
|
*
|
|
* @param base USART peripheral base address.
|
|
* @return The byte read from USART data register.
|
|
*/
|
|
static inline uint8_t USART_ReadByte(USART_Type *base)
|
|
{
|
|
return (uint8_t)base->RXDAT & 0xFFU;
|
|
}
|
|
|
|
/*!
|
|
* @brief Writes to the TX register using a blocking method.
|
|
*
|
|
* This function polls the TX register, waits for the TX register to be empty.
|
|
*
|
|
* @param base USART peripheral base address.
|
|
* @param data Start address of the data to write.
|
|
* @param length Size of the data to write.
|
|
* @retval kStatus_USART_Timeout Transmission timed out and was aborted.
|
|
* @retval kStatus_Success Successfully wrote all data.
|
|
*/
|
|
status_t USART_WriteBlocking(USART_Type *base, const uint8_t *data, size_t length);
|
|
|
|
/*!
|
|
* @brief Read RX data register using a blocking method.
|
|
*
|
|
* This function polls the RX register, waits for the RX register to be full.
|
|
*
|
|
* @param base USART peripheral base address.
|
|
* @param data Start address of the buffer to store the received data.
|
|
* @param length Size of the buffer.
|
|
* @retval kStatus_USART_FramingError Receiver overrun happened while receiving data.
|
|
* @retval kStatus_USART_ParityError Noise error happened while receiving data.
|
|
* @retval kStatus_USART_NoiseError Framing error happened while receiving data.
|
|
* @retval kStatus_USART_RxError Overflow or underflow happened.
|
|
* @retval kStatus_USART_Timeout Transmission timed out and was aborted.
|
|
* @retval kStatus_Success Successfully received all data.
|
|
*/
|
|
status_t USART_ReadBlocking(USART_Type *base, uint8_t *data, size_t length);
|
|
|
|
/* @} */
|
|
|
|
#if defined(FSL_SDK_ENABLE_USART_DRIVER_TRANSACTIONAL_APIS) && (FSL_SDK_ENABLE_USART_DRIVER_TRANSACTIONAL_APIS)
|
|
/*!
|
|
* @name Transactional
|
|
* @{
|
|
*/
|
|
|
|
/*!
|
|
* @brief Initializes the USART handle.
|
|
*
|
|
* This function initializes the USART handle which can be used for other USART
|
|
* transactional APIs. Usually, for a specified USART instance,
|
|
* call this API once to get the initialized handle.
|
|
*
|
|
* @param base USART peripheral base address.
|
|
* @param handle USART handle pointer.
|
|
* @param callback The callback function.
|
|
* @param userData The parameter of the callback function.
|
|
*/
|
|
status_t USART_TransferCreateHandle(USART_Type *base,
|
|
usart_handle_t *handle,
|
|
usart_transfer_callback_t callback,
|
|
void *userData);
|
|
|
|
/*!
|
|
* @brief Transmits a buffer of data using the interrupt method.
|
|
*
|
|
* This function sends data using an interrupt method. This is a non-blocking function, which
|
|
* returns directly without waiting for all data to be written to the TX register. When
|
|
* all data is written to the TX register in the IRQ handler, the USART driver calls the callback
|
|
* function and passes the @ref kStatus_USART_TxIdle as status parameter.
|
|
*
|
|
* @note The kStatus_USART_TxIdle is passed to the upper layer when all data is written
|
|
* to the TX register. However it does not ensure that all data are sent out. Before disabling the TX,
|
|
* check the kUSART_TransmissionCompleteFlag to ensure that the TX is finished.
|
|
*
|
|
* @param base USART peripheral base address.
|
|
* @param handle USART handle pointer.
|
|
* @param xfer USART transfer structure. See #usart_transfer_t.
|
|
* @retval kStatus_Success Successfully start the data transmission.
|
|
* @retval kStatus_USART_TxBusy Previous transmission still not finished, data not all written to TX register yet.
|
|
* @retval kStatus_InvalidArgument Invalid argument.
|
|
*/
|
|
status_t USART_TransferSendNonBlocking(USART_Type *base, usart_handle_t *handle, usart_transfer_t *xfer);
|
|
|
|
/*!
|
|
* @brief Sets up the RX ring buffer.
|
|
*
|
|
* This function sets up the RX ring buffer to a specific USART handle.
|
|
*
|
|
* When the RX ring buffer is used, data received are stored into the ring buffer even when the
|
|
* user doesn't call the USART_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 the RX ring buffer, one byte is reserved for internal use. In other
|
|
* words, if ringBufferSize is 32, then only 31 bytes are used for saving data.
|
|
*
|
|
* @param base USART peripheral base address.
|
|
* @param handle USART handle pointer.
|
|
* @param ringBuffer Start address of the ring buffer for background receiving. Pass NULL to disable the ring buffer.
|
|
* @param ringBufferSize size of the ring buffer.
|
|
*/
|
|
void USART_TransferStartRingBuffer(USART_Type *base,
|
|
usart_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 USART peripheral base address.
|
|
* @param handle USART handle pointer.
|
|
*/
|
|
void USART_TransferStopRingBuffer(USART_Type *base, usart_handle_t *handle);
|
|
|
|
/*!
|
|
* @brief Get the length of received data in RX ring buffer.
|
|
*
|
|
* @param handle USART handle pointer.
|
|
* @return Length of received data in RX ring buffer.
|
|
*/
|
|
size_t USART_TransferGetRxRingBufferLength(usart_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 still not sent out.
|
|
*
|
|
* @param base USART peripheral base address.
|
|
* @param handle USART handle pointer.
|
|
*/
|
|
void USART_TransferAbortSend(USART_Type *base, usart_handle_t *handle);
|
|
|
|
/*!
|
|
* @brief Get the number of bytes that have been written to USART TX register.
|
|
*
|
|
* This function gets the number of bytes that have been written to USART TX
|
|
* register by interrupt method.
|
|
*
|
|
* @param base USART peripheral base address.
|
|
* @param handle USART 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 USART_TransferGetSendCount(USART_Type *base, usart_handle_t *handle, uint32_t *count);
|
|
|
|
/*!
|
|
* @brief Receives a buffer of data using an interrupt method.
|
|
*
|
|
* This function receives data using an interrupt method. This is a non-blocking function, which
|
|
* returns without waiting for all data to be 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 to read, the receive
|
|
* request is saved by the USART driver. When the new data arrives, the receive request
|
|
* is serviced first. When all data is received, the USART driver notifies the upper layer
|
|
* through a callback function and passes the status parameter @ref kStatus_USART_RxIdle.
|
|
* For example, the upper layer needs 10 bytes but there are only 5 bytes in the ring buffer.
|
|
* The 5 bytes are copied to the xfer->data and this function returns with the
|
|
* parameter @p receivedBytes set to 5. For the left 5 bytes, newly arrived data is
|
|
* saved from the xfer->data[5]. When 5 bytes are received, the USART 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 the xfer->data. When all data is received, the upper layer is notified.
|
|
*
|
|
* @param base USART peripheral base address.
|
|
* @param handle USART handle pointer.
|
|
* @param xfer USART transfer structure, see #usart_transfer_t.
|
|
* @param receivedBytes Bytes received from the ring buffer directly.
|
|
* @retval kStatus_Success Successfully queue the transfer into transmit queue.
|
|
* @retval kStatus_USART_RxBusy Previous receive request is not finished.
|
|
* @retval kStatus_InvalidArgument Invalid argument.
|
|
*/
|
|
status_t USART_TransferReceiveNonBlocking(USART_Type *base,
|
|
usart_handle_t *handle,
|
|
usart_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 USART peripheral base address.
|
|
* @param handle USART handle pointer.
|
|
*/
|
|
void USART_TransferAbortReceive(USART_Type *base, usart_handle_t *handle);
|
|
|
|
/*!
|
|
* @brief Get the number of bytes that have been received.
|
|
*
|
|
* This function gets the number of bytes that have been received.
|
|
*
|
|
* @param base USART peripheral base address.
|
|
* @param handle USART 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 USART_TransferGetReceiveCount(USART_Type *base, usart_handle_t *handle, uint32_t *count);
|
|
|
|
/*!
|
|
* @brief USART IRQ handle function.
|
|
*
|
|
* This function handles the USART transmit and receive IRQ request.
|
|
*
|
|
* @param base USART peripheral base address.
|
|
* @param handle USART handle pointer.
|
|
*/
|
|
void USART_TransferHandleIRQ(USART_Type *base, usart_handle_t *handle);
|
|
|
|
/* @} */
|
|
#endif
|
|
|
|
#if defined(__cplusplus)
|
|
}
|
|
#endif
|
|
|
|
/*! @}*/
|
|
|
|
#endif /* _FSL_USART_H_ */
|