583 lines
23 KiB
C
583 lines
23 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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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* o Redistributions of source code must retain the above copyright notice, this list
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* of conditions and the following disclaimer.
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*
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* o Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* o Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _FSL_FLEXIO_UART_H_
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#define _FSL_FLEXIO_UART_H_
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#include "fsl_common.h"
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#include "fsl_flexio.h"
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/*!
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* @addtogroup flexio_uart
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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 FlexIO UART driver version 2.1.2. */
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#define FSL_FLEXIO_UART_DRIVER_VERSION (MAKE_VERSION(2, 1, 2))
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/*@}*/
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/*! @brief Error codes for the UART driver. */
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enum _flexio_uart_status
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{
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kStatus_FLEXIO_UART_TxBusy = MAKE_STATUS(kStatusGroup_FLEXIO_UART, 0), /*!< Transmitter is busy. */
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kStatus_FLEXIO_UART_RxBusy = MAKE_STATUS(kStatusGroup_FLEXIO_UART, 1), /*!< Receiver is busy. */
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kStatus_FLEXIO_UART_TxIdle = MAKE_STATUS(kStatusGroup_FLEXIO_UART, 2), /*!< UART transmitter is idle. */
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kStatus_FLEXIO_UART_RxIdle = MAKE_STATUS(kStatusGroup_FLEXIO_UART, 3), /*!< UART receiver is idle. */
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kStatus_FLEXIO_UART_ERROR = MAKE_STATUS(kStatusGroup_FLEXIO_UART, 4), /*!< ERROR happens on UART. */
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kStatus_FLEXIO_UART_RxRingBufferOverrun =
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MAKE_STATUS(kStatusGroup_FLEXIO_UART, 5), /*!< UART RX software ring buffer overrun. */
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kStatus_FLEXIO_UART_RxHardwareOverrun = MAKE_STATUS(kStatusGroup_FLEXIO_UART, 6) /*!< UART RX receiver overrun. */
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};
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/*! @brief FlexIO UART bit count per char. */
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typedef enum _flexio_uart_bit_count_per_char
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{
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kFLEXIO_UART_7BitsPerChar = 7U, /*!< 7-bit data characters */
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kFLEXIO_UART_8BitsPerChar = 8U, /*!< 8-bit data characters */
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kFLEXIO_UART_9BitsPerChar = 9U, /*!< 9-bit data characters */
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} flexio_uart_bit_count_per_char_t;
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/*! @brief Define FlexIO UART interrupt mask. */
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enum _flexio_uart_interrupt_enable
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{
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kFLEXIO_UART_TxDataRegEmptyInterruptEnable = 0x1U, /*!< Transmit buffer empty interrupt enable. */
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kFLEXIO_UART_RxDataRegFullInterruptEnable = 0x2U, /*!< Receive buffer full interrupt enable. */
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};
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/*! @brief Define FlexIO UART status mask. */
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enum _flexio_uart_status_flags
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{
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kFLEXIO_UART_TxDataRegEmptyFlag = 0x1U, /*!< Transmit buffer empty flag. */
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kFLEXIO_UART_RxDataRegFullFlag = 0x2U, /*!< Receive buffer full flag. */
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kFLEXIO_UART_RxOverRunFlag = 0x4U, /*!< Receive buffer over run flag. */
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};
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/*! @brief Define FlexIO UART access structure typedef. */
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typedef struct _flexio_uart_type
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{
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FLEXIO_Type *flexioBase; /*!< FlexIO base pointer. */
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uint8_t TxPinIndex; /*!< Pin select for UART_Tx. */
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uint8_t RxPinIndex; /*!< Pin select for UART_Rx. */
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uint8_t shifterIndex[2]; /*!< Shifter index used in FlexIO UART. */
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uint8_t timerIndex[2]; /*!< Timer index used in FlexIO UART. */
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} FLEXIO_UART_Type;
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/*! @brief Define FlexIO UART user configuration structure. */
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typedef struct _flexio_uart_config
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{
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bool enableUart; /*!< Enable/disable FlexIO UART TX & RX. */
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bool enableInDoze; /*!< Enable/disable FlexIO operation in doze mode*/
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bool enableInDebug; /*!< Enable/disable FlexIO operation in debug mode*/
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bool enableFastAccess; /*!< Enable/disable fast access to FlexIO registers,
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fast access requires the FlexIO clock to be at least
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twice the frequency of the bus clock. */
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uint32_t baudRate_Bps; /*!< Baud rate in Bps. */
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flexio_uart_bit_count_per_char_t bitCountPerChar; /*!< number of bits, 7/8/9 -bit */
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} flexio_uart_config_t;
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/*! @brief Define FlexIO UART transfer structure. */
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typedef struct _flexio_uart_transfer
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{
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uint8_t *data; /*!< Transfer buffer*/
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size_t dataSize; /*!< Transfer size*/
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} flexio_uart_transfer_t;
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/* Forward declaration of the handle typedef. */
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typedef struct _flexio_uart_handle flexio_uart_handle_t;
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/*! @brief FlexIO UART transfer callback function. */
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typedef void (*flexio_uart_transfer_callback_t)(FLEXIO_UART_Type *base,
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flexio_uart_handle_t *handle,
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status_t status,
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void *userData);
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/*! @brief Define FLEXIO UART handle structure*/
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struct _flexio_uart_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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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 txDataSizeAll; /*!< Total bytes to be sent. */
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size_t rxDataSizeAll; /*!< Total bytes to be received. */
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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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flexio_uart_transfer_callback_t callback; /*!< Callback function. */
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void *userData; /*!< UART 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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/*******************************************************************************
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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 Initialization and deinitialization
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* @{
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*/
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/*!
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* @brief Ungates the FlexIO clock, resets the FlexIO module, configures FlexIO UART
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* hardware, and configures the FlexIO UART with FlexIO UART configuration.
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* The configuration structure can be filled by the user or be set with
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* default values by FLEXIO_UART_GetDefaultConfig().
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*
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* Example
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@code
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FLEXIO_UART_Type base = {
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.flexioBase = FLEXIO,
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.TxPinIndex = 0,
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.RxPinIndex = 1,
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.shifterIndex = {0,1},
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.timerIndex = {0,1}
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};
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flexio_uart_config_t config = {
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.enableInDoze = false,
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.enableInDebug = true,
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.enableFastAccess = false,
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.baudRate_Bps = 115200U,
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.bitCountPerChar = 8
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};
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FLEXIO_UART_Init(base, &config, srcClock_Hz);
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@endcode
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*
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* @param base Pointer to the FLEXIO_UART_Type structure.
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* @param userConfig Pointer to the flexio_uart_config_t structure.
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* @param srcClock_Hz FlexIO source clock in Hz.
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* @retval kStatus_Success Configuration success
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* @retval kStatus_InvalidArgument Buadrate configuration out of range
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*/
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status_t FLEXIO_UART_Init(FLEXIO_UART_Type *base, const flexio_uart_config_t *userConfig, uint32_t srcClock_Hz);
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/*!
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* @brief Resets the FlexIO UART shifter and timer config.
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*
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* @note After calling this API, call the FLEXO_UART_Init to use the FlexIO UART module.
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*
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* @param base Pointer to FLEXIO_UART_Type structure
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*/
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void FLEXIO_UART_Deinit(FLEXIO_UART_Type *base);
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/*!
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* @brief Gets the default configuration to configure the FlexIO UART. The configuration
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* can be used directly for calling the FLEXIO_UART_Init().
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* Example:
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@code
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flexio_uart_config_t config;
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FLEXIO_UART_GetDefaultConfig(&userConfig);
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@endcode
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* @param userConfig Pointer to the flexio_uart_config_t structure.
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*/
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void FLEXIO_UART_GetDefaultConfig(flexio_uart_config_t *userConfig);
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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 the FlexIO UART status flags.
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*
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* @param base Pointer to the FLEXIO_UART_Type structure.
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* @return FlexIO UART status flags.
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*/
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uint32_t FLEXIO_UART_GetStatusFlags(FLEXIO_UART_Type *base);
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/*!
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* @brief Gets the FlexIO UART status flags.
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*
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* @param base Pointer to the FLEXIO_UART_Type structure.
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* @param mask Status flag.
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* The parameter can be any combination of the following values:
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* @arg kFLEXIO_UART_TxDataRegEmptyFlag
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* @arg kFLEXIO_UART_RxEmptyFlag
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* @arg kFLEXIO_UART_RxOverRunFlag
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*/
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void FLEXIO_UART_ClearStatusFlags(FLEXIO_UART_Type *base, uint32_t mask);
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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 the FlexIO UART interrupt.
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*
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* This function enables the FlexIO UART interrupt.
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*
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* @param base Pointer to the FLEXIO_UART_Type structure.
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* @param mask Interrupt source.
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*/
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void FLEXIO_UART_EnableInterrupts(FLEXIO_UART_Type *base, uint32_t mask);
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/*!
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* @brief Disables the FlexIO UART interrupt.
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*
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* This function disables the FlexIO UART interrupt.
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*
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* @param base Pointer to the FLEXIO_UART_Type structure.
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* @param mask Interrupt source.
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*/
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void FLEXIO_UART_DisableInterrupts(FLEXIO_UART_Type *base, uint32_t mask);
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/* @} */
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/*!
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* @name DMA Control
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* @{
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*/
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/*!
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* @brief Gets the FlexIO UARt transmit data register address.
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*
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* This function returns the UART data register address, which is mainly used by DMA/eDMA.
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*
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* @param base Pointer to the FLEXIO_UART_Type structure.
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* @return FlexIO UART transmit data register address.
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*/
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static inline uint32_t FLEXIO_UART_GetTxDataRegisterAddress(FLEXIO_UART_Type *base)
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{
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return FLEXIO_GetShifterBufferAddress(base->flexioBase, kFLEXIO_ShifterBuffer, base->shifterIndex[0]);
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}
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/*!
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* @brief Gets the FlexIO UART receive data register address.
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*
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* This function returns the UART data register address, which is mainly used by DMA/eDMA.
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*
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* @param base Pointer to the FLEXIO_UART_Type structure.
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* @return FlexIO UART receive data register address.
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*/
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static inline uint32_t FLEXIO_UART_GetRxDataRegisterAddress(FLEXIO_UART_Type *base)
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{
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return FLEXIO_GetShifterBufferAddress(base->flexioBase, kFLEXIO_ShifterBufferByteSwapped, base->shifterIndex[1]);
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}
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/*!
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* @brief Enables/disables the FlexIO UART transmit DMA.
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* This function enables/disables the FlexIO UART Tx DMA,
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* which means asserting the kFLEXIO_UART_TxDataRegEmptyFlag does/doesn't trigger the DMA request.
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*
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* @param base Pointer to the FLEXIO_UART_Type structure.
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* @param enable True to enable, false to disable.
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*/
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static inline void FLEXIO_UART_EnableTxDMA(FLEXIO_UART_Type *base, bool enable)
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{
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FLEXIO_EnableShifterStatusDMA(base->flexioBase, 1 << base->shifterIndex[0], enable);
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}
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/*!
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* @brief Enables/disables the FlexIO UART receive DMA.
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* This function enables/disables the FlexIO UART Rx DMA,
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* which means asserting kFLEXIO_UART_RxDataRegFullFlag does/doesn't trigger the DMA request.
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*
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* @param base Pointer to the FLEXIO_UART_Type structure.
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* @param enable True to enable, false to disable.
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*/
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static inline void FLEXIO_UART_EnableRxDMA(FLEXIO_UART_Type *base, bool enable)
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{
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FLEXIO_EnableShifterStatusDMA(base->flexioBase, 1 << base->shifterIndex[1], enable);
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}
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/* @} */
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/*!
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* @name Bus Operations
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* @{
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*/
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/*!
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* @brief Enables/disables the FlexIO UART module operation.
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*
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* @param base Pointer to the FLEXIO_UART_Type.
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* @param enable True to enable, false does not have any effect.
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*/
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static inline void FLEXIO_UART_Enable(FLEXIO_UART_Type *base, bool enable)
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{
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if (enable)
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{
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base->flexioBase->CTRL |= FLEXIO_CTRL_FLEXEN_MASK;
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}
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}
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/*!
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* @brief Writes one byte of data.
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*
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* @note This is a non-blocking API, which returns directly after the data is put into the
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* data register. Ensure that the TxEmptyFlag is asserted before calling
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* this API.
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*
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* @param base Pointer to the FLEXIO_UART_Type structure.
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* @param buffer The data bytes to send.
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*/
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static inline void FLEXIO_UART_WriteByte(FLEXIO_UART_Type *base, const uint8_t *buffer)
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{
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base->flexioBase->SHIFTBUF[base->shifterIndex[0]] = *buffer;
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}
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/*!
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* @brief Reads one byte of data.
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*
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* @note This is a non-blocking API, which returns directly after the data is read from the
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* data register. Ensure that the RxFullFlag is asserted before calling this API.
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*
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* @param base Pointer to the FLEXIO_UART_Type structure.
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* @param buffer The buffer to store the received bytes.
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*/
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static inline void FLEXIO_UART_ReadByte(FLEXIO_UART_Type *base, uint8_t *buffer)
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{
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*buffer = base->flexioBase->SHIFTBUFBYS[base->shifterIndex[1]];
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}
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/*!
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* @brief Sends a buffer of data bytes.
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*
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* @note This function blocks using the polling method until all bytes have been sent.
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*
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* @param base Pointer to the FLEXIO_UART_Type structure.
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* @param txData The data bytes to send.
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* @param txSize The number of data bytes to send.
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*/
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void FLEXIO_UART_WriteBlocking(FLEXIO_UART_Type *base, const uint8_t *txData, size_t txSize);
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/*!
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* @brief Receives a buffer of bytes.
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*
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* @note This function blocks using the polling method until all bytes have been received.
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*
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* @param base Pointer to the FLEXIO_UART_Type structure.
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* @param rxData The buffer to store the received bytes.
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* @param rxSize The number of data bytes to be received.
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*/
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void FLEXIO_UART_ReadBlocking(FLEXIO_UART_Type *base, uint8_t *rxData, size_t rxSize);
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/* @} */
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/*!
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* @name Transactional
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* @{
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*/
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/*!
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* @brief Initializes the UART handle.
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*
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* This function initializes the FlexIO UART handle, which can be used for other FlexIO
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* UART transactional APIs. Call this API once to get the
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* initialized handle.
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*
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* The UART driver supports the "background" receiving, which means that users can set up
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* a RX ring buffer optionally. Data received is stored into the ring buffer even when
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* the user doesn't call the FLEXIO_UART_TransferReceiveNonBlocking() API. If there is already data
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* received in the ring buffer, users can get the received data from the ring buffer
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* directly. The ring buffer is disabled if passing NULL as @p ringBuffer.
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*
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* @param base to FLEXIO_UART_Type structure.
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* @param handle Pointer to the flexio_uart_handle_t structure to store the transfer state.
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* @param callback The callback function.
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* @param userData The parameter of the callback function.
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* @retval kStatus_Success Successfully create the handle.
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* @retval kStatus_OutOfRange The FlexIO type/handle/ISR table out of range.
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*/
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status_t FLEXIO_UART_TransferCreateHandle(FLEXIO_UART_Type *base,
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flexio_uart_handle_t *handle,
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flexio_uart_transfer_callback_t callback,
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void *userData);
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/*!
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* @brief Sets up the RX ring buffer.
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*
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* This function sets up the RX ring buffer to a specific UART handle.
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*
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* When the RX ring buffer is used, data received is stored into the ring buffer even when
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* the user doesn't call the UART_ReceiveNonBlocking() API. If there is already data received
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* in the ring buffer, users can get the received data from the ring buffer directly.
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*
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* @note When using the RX ring buffer, one byte is reserved for internal use. In other
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* words, if @p ringBufferSize is 32, only 31 bytes are used for saving data.
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*
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* @param base Pointer to the FLEXIO_UART_Type structure.
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* @param handle Pointer to the flexio_uart_handle_t structure to store the transfer state.
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* @param ringBuffer Start address of ring buffer for background receiving. Pass NULL to disable the ring buffer.
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* @param ringBufferSize Size of the ring buffer.
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*/
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void FLEXIO_UART_TransferStartRingBuffer(FLEXIO_UART_Type *base,
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flexio_uart_handle_t *handle,
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uint8_t *ringBuffer,
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size_t ringBufferSize);
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/*!
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* @brief Aborts the background transfer and uninstalls the ring buffer.
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*
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* This function aborts the background transfer and uninstalls the ring buffer.
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*
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* @param base Pointer to the FLEXIO_UART_Type structure.
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* @param handle Pointer to the flexio_uart_handle_t structure to store the transfer state.
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*/
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void FLEXIO_UART_TransferStopRingBuffer(FLEXIO_UART_Type *base, flexio_uart_handle_t *handle);
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/*!
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* @brief Transmits a buffer of data using the interrupt method.
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*
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* This function sends data using an interrupt method. This is a non-blocking function,
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* which returns directly without waiting for all data to be written to the TX register. When
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* all data is written to the TX register in ISR, the FlexIO UART driver calls the callback
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* function and passes the @ref kStatus_FLEXIO_UART_TxIdle as status parameter.
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*
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* @note The kStatus_FLEXIO_UART_TxIdle is passed to the upper layer when all data is written
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* to the TX register. However, it does not ensure that all data is sent out.
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*
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* @param base Pointer to the FLEXIO_UART_Type structure.
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* @param handle Pointer to the flexio_uart_handle_t structure to store the transfer state.
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* @param xfer FlexIO UART transfer structure. See #flexio_uart_transfer_t.
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* @retval kStatus_Success Successfully starts the data transmission.
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* @retval kStatus_UART_TxBusy Previous transmission still not finished, data not written to the TX register.
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*/
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status_t FLEXIO_UART_TransferSendNonBlocking(FLEXIO_UART_Type *base,
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flexio_uart_handle_t *handle,
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flexio_uart_transfer_t *xfer);
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/*!
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* @brief Aborts the interrupt-driven data transmit.
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*
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* This function aborts the interrupt-driven data sending. Get the remainBytes to find out
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* how many bytes are still not sent out.
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*
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* @param base Pointer to the FLEXIO_UART_Type structure.
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* @param handle Pointer to the flexio_uart_handle_t structure to store the transfer state.
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*/
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void FLEXIO_UART_TransferAbortSend(FLEXIO_UART_Type *base, flexio_uart_handle_t *handle);
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/*!
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* @brief Gets the number of bytes sent.
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*
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* This function gets the number of bytes sent driven by interrupt.
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*
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* @param base Pointer to the FLEXIO_UART_Type structure.
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* @param handle Pointer to the flexio_uart_handle_t structure to store the transfer state.
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* @param count Number of bytes sent so far by the non-blocking transaction.
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* @retval kStatus_NoTransferInProgress transfer has finished or no transfer in progress.
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* @retval kStatus_Success Successfully return the count.
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*/
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status_t FLEXIO_UART_TransferGetSendCount(FLEXIO_UART_Type *base, flexio_uart_handle_t *handle, size_t *count);
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/*!
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* @brief Receives a buffer of data using the interrupt method.
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*
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* This function receives data using the interrupt method. This is a non-blocking function,
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* which returns without waiting for all data to be received.
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* If the RX ring buffer is used and not empty, the data in ring buffer is copied and
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* the parameter @p receivedBytes shows how many bytes are copied from the ring buffer.
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* After copying, if the data in ring buffer is not enough to read, the receive
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* request is saved by the UART driver. When new data arrives, the receive request
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* is serviced first. When all data is received, the UART driver notifies the upper layer
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* through a callback function and passes the status parameter @ref kStatus_UART_RxIdle.
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* For example, if the upper layer needs 10 bytes but there are only 5 bytes in the ring buffer,
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* the 5 bytes are copied to xfer->data. This function returns with the
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* parameter @p receivedBytes set to 5. For the last 5 bytes, newly arrived data is
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* saved from the xfer->data[5]. When 5 bytes are received, the UART driver notifies upper layer.
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* If the RX ring buffer is not enabled, this function enables the RX and RX interrupt
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* to receive data to xfer->data. When all data is received, the upper layer is notified.
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*
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* @param base Pointer to the FLEXIO_UART_Type structure.
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* @param handle Pointer to the flexio_uart_handle_t structure to store the transfer state.
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* @param xfer UART transfer structure. See #flexio_uart_transfer_t.
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* @param receivedBytes Bytes received from the ring buffer directly.
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* @retval kStatus_Success Successfully queue the transfer into the transmit queue.
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* @retval kStatus_FLEXIO_UART_RxBusy Previous receive request is not finished.
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*/
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status_t FLEXIO_UART_TransferReceiveNonBlocking(FLEXIO_UART_Type *base,
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flexio_uart_handle_t *handle,
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|
flexio_uart_transfer_t *xfer,
|
|
size_t *receivedBytes);
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|
|
|
/*!
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|
* @brief Aborts the receive data which was using IRQ.
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|
*
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|
* This function aborts the receive data which was using IRQ.
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|
*
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|
* @param base Pointer to the FLEXIO_UART_Type structure.
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|
* @param handle Pointer to the flexio_uart_handle_t structure to store the transfer state.
|
|
*/
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|
void FLEXIO_UART_TransferAbortReceive(FLEXIO_UART_Type *base, flexio_uart_handle_t *handle);
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|
|
|
/*!
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|
* @brief Gets the number of bytes received.
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|
*
|
|
* This function gets the number of bytes received driven by interrupt.
|
|
*
|
|
* @param base Pointer to the FLEXIO_UART_Type structure.
|
|
* @param handle Pointer to the flexio_uart_handle_t structure to store the transfer state.
|
|
* @param count Number of bytes received so far by the non-blocking transaction.
|
|
* @retval kStatus_NoTransferInProgress transfer has finished or no transfer in progress.
|
|
* @retval kStatus_Success Successfully return the count.
|
|
*/
|
|
status_t FLEXIO_UART_TransferGetReceiveCount(FLEXIO_UART_Type *base, flexio_uart_handle_t *handle, size_t *count);
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|
|
|
/*!
|
|
* @brief FlexIO UART IRQ handler function.
|
|
*
|
|
* This function processes the FlexIO UART transmit and receives the IRQ request.
|
|
*
|
|
* @param uartType Pointer to the FLEXIO_UART_Type structure.
|
|
* @param uartHandle Pointer to the flexio_uart_handle_t structure to store the transfer state.
|
|
*/
|
|
void FLEXIO_UART_TransferHandleIRQ(void *uartType, void *uartHandle);
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|
|
|
/*@}*/
|
|
|
|
#if defined(__cplusplus)
|
|
}
|
|
#endif /*_cplusplus*/
|
|
/*@}*/
|
|
|
|
#endif /*_FSL_FLEXIO_UART_H_*/
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