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Diffstat (limited to '')
| -rw-r--r-- | bsps/arm/imxrt/nxp/devices/MIMXRT1052/drivers/fsl_flexio_i2c_master.c | 1258 |
1 files changed, 0 insertions, 1258 deletions
diff --git a/bsps/arm/imxrt/nxp/devices/MIMXRT1052/drivers/fsl_flexio_i2c_master.c b/bsps/arm/imxrt/nxp/devices/MIMXRT1052/drivers/fsl_flexio_i2c_master.c deleted file mode 100644 index 43b5bc1b88..0000000000 --- a/bsps/arm/imxrt/nxp/devices/MIMXRT1052/drivers/fsl_flexio_i2c_master.c +++ /dev/null @@ -1,1258 +0,0 @@ -/* - * Copyright (c) 2015, Freescale Semiconductor, Inc. - * Copyright 2016-2020 NXP - * All rights reserved. - * - * SPDX-License-Identifier: BSD-3-Clause - */ - -#include "fsl_flexio_i2c_master.h" - -/******************************************************************************* - * Definitions - ******************************************************************************/ - -/* Component ID definition, used by tools. */ -#ifndef FSL_COMPONENT_ID -#define FSL_COMPONENT_ID "platform.drivers.flexio_i2c_master" -#endif - -/*! @brief FLEXIO I2C transfer state */ -enum _flexio_i2c_master_transfer_states -{ - kFLEXIO_I2C_Idle = 0x0U, /*!< I2C bus idle */ - kFLEXIO_I2C_Start = 0x1U, /*!< I2C start phase */ - kFLEXIO_I2C_SendCommand = 0x2U, /*!< Send command byte phase */ - kFLEXIO_I2C_SendData = 0x3U, /*!< Send data transfer phase*/ - kFLEXIO_I2C_ReceiveDataBegin = 0x4U, /*!< Receive data begin transfer phase*/ - kFLEXIO_I2C_ReceiveData = 0x5U, /*!< Receive data transfer phase*/ -}; - -/******************************************************************************* - * Prototypes - ******************************************************************************/ - -/*! - * @brief Set up master transfer, send slave address and decide the initial - * transfer state. - * - * @param base pointer to FLEXIO_I2C_Type structure - * @param handle pointer to flexio_i2c_master_handle_t structure which stores the transfer state - * @param transfer pointer to flexio_i2c_master_transfer_t structure - */ -static status_t FLEXIO_I2C_MasterTransferInitStateMachine(FLEXIO_I2C_Type *base, - flexio_i2c_master_handle_t *handle, - flexio_i2c_master_transfer_t *xfer); - -/*! - * @brief Master run transfer state machine to perform a byte of transfer. - * - * @param base pointer to FLEXIO_I2C_Type structure - * @param handle pointer to flexio_i2c_master_handle_t structure which stores the transfer state - * @param statusFlags flexio i2c hardware status - * @retval kStatus_Success Successfully run state machine - * @retval kStatus_FLEXIO_I2C_Nak Receive Nak during transfer - */ -static status_t FLEXIO_I2C_MasterTransferRunStateMachine(FLEXIO_I2C_Type *base, - flexio_i2c_master_handle_t *handle, - uint32_t statusFlags); - -/*! - * @brief Complete transfer, disable interrupt and call callback. - * - * @param base pointer to FLEXIO_I2C_Type structure - * @param handle pointer to flexio_i2c_master_handle_t structure which stores the transfer state - * @param status flexio transfer status - */ -static void FLEXIO_I2C_MasterTransferComplete(FLEXIO_I2C_Type *base, - flexio_i2c_master_handle_t *handle, - status_t status); - -/******************************************************************************* - * Codes - ******************************************************************************/ - -static uint32_t FLEXIO_I2C_GetInstance(FLEXIO_I2C_Type *base) -{ - return FLEXIO_GetInstance(base->flexioBase); -} - -static status_t FLEXIO_I2C_MasterTransferInitStateMachine(FLEXIO_I2C_Type *base, - flexio_i2c_master_handle_t *handle, - flexio_i2c_master_transfer_t *xfer) -{ - bool needRestart; - uint32_t byteCount; - - /* Init the handle member. */ - handle->transfer.slaveAddress = xfer->slaveAddress; - handle->transfer.direction = xfer->direction; - handle->transfer.subaddress = xfer->subaddress; - handle->transfer.subaddressSize = xfer->subaddressSize; - handle->transfer.data = xfer->data; - handle->transfer.dataSize = xfer->dataSize; - handle->transfer.flags = xfer->flags; - handle->transferSize = xfer->dataSize; - - /* Initial state, i2c start state. */ - handle->state = (uint8_t)kFLEXIO_I2C_Start; - - /* Clear all status before transfer. */ - FLEXIO_I2C_MasterClearStatusFlags(base, (uint32_t)kFLEXIO_I2C_ReceiveNakFlag); - - /* Calculate whether need to send re-start. */ - needRestart = (handle->transfer.subaddressSize != 0U) && (handle->transfer.direction == kFLEXIO_I2C_Read); - handle->needRestart = needRestart; - - /* Calculate total byte count in a frame. */ - byteCount = 1U; - - if (!needRestart) - { - byteCount += handle->transfer.dataSize; - } - - if (handle->transfer.subaddressSize != 0U) - { - byteCount += handle->transfer.subaddressSize; - } - - /* Configure data count. */ - if (FLEXIO_I2C_MasterSetTransferCount(base, (uint16_t)byteCount) != kStatus_Success) - { - return kStatus_InvalidArgument; - } - - /* Configure timer1 disable condition. */ - uint32_t tmpConfig = base->flexioBase->TIMCFG[base->timerIndex[1]]; - tmpConfig &= ~FLEXIO_TIMCFG_TIMDIS_MASK; - tmpConfig |= FLEXIO_TIMCFG_TIMDIS(kFLEXIO_TimerDisableOnPreTimerDisable); - base->flexioBase->TIMCFG[base->timerIndex[1]] = tmpConfig; - -#if I2C_RETRY_TIMES - uint32_t waitTimes = I2C_RETRY_TIMES; - while ((0U == (FLEXIO_GetShifterStatusFlags(base->flexioBase) & (1UL << base->shifterIndex[0]))) && - (0U != --waitTimes)) - { - } - if (0U == waitTimes) - { - return kStatus_FLEXIO_I2C_Timeout; - } -#else - while (0U == (FLEXIO_GetShifterStatusFlags(base->flexioBase) & (1UL << base->shifterIndex[0]))) - { - } -#endif - - return kStatus_Success; -} - -static status_t FLEXIO_I2C_MasterTransferRunStateMachine(FLEXIO_I2C_Type *base, - flexio_i2c_master_handle_t *handle, - uint32_t statusFlags) -{ -#if I2C_RETRY_TIMES - uint32_t waitTimes = I2C_RETRY_TIMES; -#endif - - if ((statusFlags & (uint32_t)kFLEXIO_I2C_ReceiveNakFlag) != 0U) - { - /* Clear receive nak flag. */ - FLEXIO_ClearShifterErrorFlags(base->flexioBase, 1UL << base->shifterIndex[1]); - - if ((!((handle->state == (uint8_t)kFLEXIO_I2C_SendData) && (handle->transfer.dataSize == 0U))) && - (!(((handle->state == (uint8_t)kFLEXIO_I2C_ReceiveData) || - (handle->state == (uint8_t)kFLEXIO_I2C_ReceiveDataBegin)) && - (handle->transfer.dataSize == 1U)))) - { - (void)FLEXIO_I2C_MasterReadByte(base); - - FLEXIO_I2C_MasterAbortStop(base); - - /* Delay one clk cycle to ensure the bus is idle. */ - SDK_DelayAtLeastUs(1000000UL / base->baudrate, SDK_DEVICE_MAXIMUM_CPU_CLOCK_FREQUENCY); - - handle->state = (uint8_t)kFLEXIO_I2C_Idle; - - return kStatus_FLEXIO_I2C_Nak; - } - } - - if (((statusFlags & (uint8_t)kFLEXIO_I2C_RxFullFlag) != 0U) && (handle->state != (uint8_t)kFLEXIO_I2C_ReceiveData)) - { - (void)FLEXIO_I2C_MasterReadByte(base); - } - - switch (handle->state) - { - /* Initial state, i2c start state. */ - case (uint8_t)kFLEXIO_I2C_Start: - /* Send address byte first. */ - if (handle->needRestart) - { - FLEXIO_I2C_MasterStart(base, handle->transfer.slaveAddress, kFLEXIO_I2C_Write); - } - else - { - FLEXIO_I2C_MasterStart(base, handle->transfer.slaveAddress, handle->transfer.direction); - } - if (handle->transfer.subaddressSize == 0U) - { - if (handle->transfer.direction == kFLEXIO_I2C_Write) - { - /* Next state, send data. */ - handle->state = (uint8_t)kFLEXIO_I2C_SendData; - } - else - { - /* Next state, receive data begin. */ - handle->state = (uint8_t)kFLEXIO_I2C_ReceiveDataBegin; - } - } - else - { - /* Next state, send command byte. */ - handle->state = (uint8_t)kFLEXIO_I2C_SendCommand; - } - break; - - /* Check address only needed for transfer with subaddress */ - case (uint8_t)kFLEXIO_I2C_SendCommand: - if ((statusFlags & (uint32_t)kFLEXIO_I2C_TxEmptyFlag) != 0U) - { - if (handle->transfer.subaddressSize > 0U) - { - handle->transfer.subaddressSize--; - FLEXIO_I2C_MasterWriteByte( - base, ((handle->transfer.subaddress) >> (8U * handle->transfer.subaddressSize))); - - if (handle->transfer.subaddressSize == 0U) - { - /* Load re-start in advance. */ - if (handle->transfer.direction == kFLEXIO_I2C_Read) - { -#if I2C_RETRY_TIMES - while ((0U == (FLEXIO_GetShifterStatusFlags(base->flexioBase) & - (1UL << base->shifterIndex[0]))) && - (0U != --waitTimes)) - { - } - if (0U == waitTimes) - { - return kStatus_FLEXIO_I2C_Timeout; - } -#else - while (0U == - (FLEXIO_GetShifterStatusFlags(base->flexioBase) & (1UL << base->shifterIndex[0]))) - { - } -#endif - FLEXIO_I2C_MasterRepeatedStart(base); - } - } - } - else - { - if (handle->transfer.direction == kFLEXIO_I2C_Write) - { - /* Send first byte of data. */ - if (handle->transfer.dataSize > 0U) - { - /* Next state, send data. */ - handle->state = (uint8_t)kFLEXIO_I2C_SendData; - - FLEXIO_I2C_MasterWriteByte(base, *handle->transfer.data); - handle->transfer.data++; - handle->transfer.dataSize--; - } - else - { - FLEXIO_I2C_MasterStop(base); - -#if I2C_RETRY_TIMES - while ((0U == (FLEXIO_I2C_MasterGetStatusFlags(base) & (uint32_t)kFLEXIO_I2C_RxFullFlag)) && - (0U != --waitTimes)) - { - } - if (0U == waitTimes) - { - return kStatus_FLEXIO_I2C_Timeout; - } -#else - while (0U == (FLEXIO_I2C_MasterGetStatusFlags(base) & (uint32_t)kFLEXIO_I2C_RxFullFlag)) - { - } -#endif - (void)FLEXIO_I2C_MasterReadByte(base); - - handle->state = (uint8_t)kFLEXIO_I2C_Idle; - } - } - else - { - (void)FLEXIO_I2C_MasterSetTransferCount(base, (uint16_t)(handle->transfer.dataSize + 1U)); - FLEXIO_I2C_MasterStart(base, handle->transfer.slaveAddress, kFLEXIO_I2C_Read); - - /* Next state, receive data begin. */ - handle->state = (uint8_t)kFLEXIO_I2C_ReceiveDataBegin; - } - } - } - break; - - /* Send command byte. */ - case (uint8_t)kFLEXIO_I2C_SendData: - if ((statusFlags & (uint32_t)kFLEXIO_I2C_TxEmptyFlag) != 0U) - { - /* Send one byte of data. */ - if (handle->transfer.dataSize > 0U) - { - FLEXIO_I2C_MasterWriteByte(base, *handle->transfer.data); - - handle->transfer.data++; - handle->transfer.dataSize--; - } - else - { - FLEXIO_I2C_MasterStop(base); - -#if I2C_RETRY_TIMES - while ((0U == (FLEXIO_I2C_MasterGetStatusFlags(base) & (uint32_t)kFLEXIO_I2C_RxFullFlag)) && - (0U != --waitTimes)) - { - } - if (0U == waitTimes) - { - return kStatus_FLEXIO_I2C_Timeout; - } -#else - while (0U == (FLEXIO_I2C_MasterGetStatusFlags(base) & (uint32_t)kFLEXIO_I2C_RxFullFlag)) - { - } -#endif - (void)FLEXIO_I2C_MasterReadByte(base); - - handle->state = (uint8_t)kFLEXIO_I2C_Idle; - } - } - break; - - case (uint8_t)kFLEXIO_I2C_ReceiveDataBegin: - if ((statusFlags & (uint32_t)kFLEXIO_I2C_RxFullFlag) != 0U) - { - handle->state = (uint8_t)kFLEXIO_I2C_ReceiveData; - /* Send nak at the last receive byte. */ - if (handle->transfer.dataSize == 1U) - { - FLEXIO_I2C_MasterEnableAck(base, false); -#if I2C_RETRY_TIMES - while ((0U == (FLEXIO_GetShifterStatusFlags(base->flexioBase) & (1UL << base->shifterIndex[0]))) && - (0U != --waitTimes)) - { - } - if (0U == waitTimes) - { - return kStatus_FLEXIO_I2C_Timeout; - } -#else - while (0U == (FLEXIO_GetShifterStatusFlags(base->flexioBase) & (1UL << base->shifterIndex[0]))) - { - } -#endif - FLEXIO_I2C_MasterStop(base); - } - else - { - FLEXIO_I2C_MasterEnableAck(base, true); - } - } - else if ((statusFlags & (uint32_t)kFLEXIO_I2C_TxEmptyFlag) != 0U) - { - /* Read one byte of data. */ - FLEXIO_I2C_MasterWriteByte(base, 0xFFFFFFFFU); - } - else - { - ; /* Avoid MISRA 2012 rule 15.7 */ - } - break; - - case (uint8_t)kFLEXIO_I2C_ReceiveData: - if ((statusFlags & (uint32_t)kFLEXIO_I2C_RxFullFlag) != 0U) - { - *handle->transfer.data = FLEXIO_I2C_MasterReadByte(base); - handle->transfer.data++; - if (0U != handle->transfer.dataSize--) - { - if (handle->transfer.dataSize == 0U) - { - FLEXIO_I2C_MasterDisableInterrupts(base, (uint32_t)kFLEXIO_I2C_RxFullInterruptEnable); - handle->state = (uint8_t)kFLEXIO_I2C_Idle; - /* Return nak if ReceiveNakFlag is not set */ - if ((statusFlags & (uint32_t)kFLEXIO_I2C_ReceiveNakFlag) == 0U) - { - return kStatus_FLEXIO_I2C_Nak; - } - } - - /* Send nak at the last receive byte. */ - if (handle->transfer.dataSize == 1U) - { - FLEXIO_I2C_MasterEnableAck(base, false); -#if I2C_RETRY_TIMES - while ( - (0U == (FLEXIO_GetShifterStatusFlags(base->flexioBase) & (1UL << base->shifterIndex[0]))) && - (0U != --waitTimes)) - { - } - if (0U == waitTimes) - { - return kStatus_FLEXIO_I2C_Timeout; - } -#else - while (0U == (FLEXIO_GetShifterStatusFlags(base->flexioBase) & (1UL << base->shifterIndex[0]))) - { - } -#endif - FLEXIO_I2C_MasterStop(base); - } - } - } - else if ((statusFlags & (uint32_t)kFLEXIO_I2C_TxEmptyFlag) != 0U) - { - if (handle->transfer.dataSize > 1U) - { - FLEXIO_I2C_MasterWriteByte(base, 0xFFFFFFFFU); - } - } - else - { - ; /* Avoid MISRA 2012 rule 15.7 */ - } - break; - - default: - /* Add comment to avoid MISRA violation */ - break; - } - - return kStatus_Success; -} - -static void FLEXIO_I2C_MasterTransferComplete(FLEXIO_I2C_Type *base, - flexio_i2c_master_handle_t *handle, - status_t status) -{ - FLEXIO_I2C_MasterDisableInterrupts( - base, (uint32_t)kFLEXIO_I2C_TxEmptyInterruptEnable | (uint32_t)kFLEXIO_I2C_RxFullInterruptEnable); - - if (handle->completionCallback != NULL) - { - handle->completionCallback(base, handle, status, handle->userData); - } -} - -#if defined(FSL_FEATURE_FLEXIO_HAS_PIN_STATUS) && FSL_FEATURE_FLEXIO_HAS_PIN_STATUS -/*! - * brief Make sure the bus isn't already pulled down. - * - * Check the FLEXIO pin status to see whether either of SDA and SCL pin is pulled down. - * - * param base Pointer to FLEXIO_I2C_Type structure.. - * retval kStatus_Success - * retval kStatus_FLEXIO_I2C_Busy - */ -status_t FLEXIO_I2C_CheckForBusyBus(FLEXIO_I2C_Type *base) -{ - uint32_t mask; - /* If in certain loops the SDA/SCL is continuously pulled down, then return bus busy status. */ - /* The loop count is determined by maximum CPU clock frequency */ - for (uint32_t i = 0U; i < SDK_DEVICE_MAXIMUM_CPU_CLOCK_FREQUENCY / 600000U; ++i) - { - mask = 1UL << base->SDAPinIndex | 1UL << base->SCLPinIndex; - if ((FLEXIO_ReadPinInput(base->flexioBase) & mask) == mask) - { - return kStatus_Success; - } - } - return kStatus_FLEXIO_I2C_Busy; -} -#endif /*FSL_FEATURE_FLEXIO_HAS_PIN_STATUS*/ - -/*! - * brief Ungates the FlexIO clock, resets the FlexIO module, and configures the FlexIO I2C - * hardware configuration. - * - * Example - code - FLEXIO_I2C_Type base = { - .flexioBase = FLEXIO, - .SDAPinIndex = 0, - .SCLPinIndex = 1, - .shifterIndex = {0,1}, - .timerIndex = {0,1} - }; - flexio_i2c_master_config_t config = { - .enableInDoze = false, - .enableInDebug = true, - .enableFastAccess = false, - .baudRate_Bps = 100000 - }; - FLEXIO_I2C_MasterInit(base, &config, srcClock_Hz); - endcode - * - * param base Pointer to FLEXIO_I2C_Type structure. - * param masterConfig Pointer to flexio_i2c_master_config_t structure. - * param srcClock_Hz FlexIO source clock in Hz. - * retval kStatus_Success Initialization successful - * retval kStatus_InvalidArgument The source clock exceed upper range limitation -*/ -status_t FLEXIO_I2C_MasterInit(FLEXIO_I2C_Type *base, flexio_i2c_master_config_t *masterConfig, uint32_t srcClock_Hz) -{ - assert((base != NULL) && (masterConfig != NULL)); - - flexio_shifter_config_t shifterConfig; - flexio_timer_config_t timerConfig; - uint32_t controlVal = 0; - uint16_t timerDiv = 0; - status_t result = kStatus_Success; - - (void)memset(&shifterConfig, 0, sizeof(shifterConfig)); - (void)memset(&timerConfig, 0, sizeof(timerConfig)); - -#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) - /* Ungate flexio clock. */ - CLOCK_EnableClock(s_flexioClocks[FLEXIO_I2C_GetInstance(base)]); -#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */ - - /* Do hardware configuration. */ - /* 1. Configure the shifter 0 for tx. */ - shifterConfig.timerSelect = base->timerIndex[2]; - shifterConfig.timerPolarity = kFLEXIO_ShifterTimerPolarityOnPositive; - shifterConfig.pinConfig = kFLEXIO_PinConfigOpenDrainOrBidirection; - shifterConfig.pinSelect = base->SDAPinIndex; - shifterConfig.pinPolarity = kFLEXIO_PinActiveLow; - shifterConfig.shifterMode = kFLEXIO_ShifterModeTransmit; - shifterConfig.inputSource = kFLEXIO_ShifterInputFromPin; - shifterConfig.shifterStop = kFLEXIO_ShifterStopBitHigh; - shifterConfig.shifterStart = kFLEXIO_ShifterStartBitLow; - - FLEXIO_SetShifterConfig(base->flexioBase, base->shifterIndex[0], &shifterConfig); - - /* 2. Configure the shifter 1 for rx. */ - shifterConfig.timerSelect = base->timerIndex[2]; - shifterConfig.timerPolarity = kFLEXIO_ShifterTimerPolarityOnNegitive; - shifterConfig.pinConfig = kFLEXIO_PinConfigOutputDisabled; - shifterConfig.pinSelect = base->SDAPinIndex; - shifterConfig.pinPolarity = kFLEXIO_PinActiveHigh; - shifterConfig.shifterMode = kFLEXIO_ShifterModeReceive; - shifterConfig.inputSource = kFLEXIO_ShifterInputFromPin; - shifterConfig.shifterStop = kFLEXIO_ShifterStopBitLow; - shifterConfig.shifterStart = kFLEXIO_ShifterStartBitDisabledLoadDataOnEnable; - - FLEXIO_SetShifterConfig(base->flexioBase, base->shifterIndex[1], &shifterConfig); - - /*3. Configure the timer 0 and timer 1 for generating bit clock. */ - /* timer 1 is used to config baudrate */ - timerConfig.triggerSelect = FLEXIO_TIMER_TRIGGER_SEL_SHIFTnSTAT(base->shifterIndex[0]); - timerConfig.triggerPolarity = kFLEXIO_TimerTriggerPolarityActiveLow; - timerConfig.triggerSource = kFLEXIO_TimerTriggerSourceInternal; - timerConfig.pinConfig = kFLEXIO_PinConfigOpenDrainOrBidirection; - timerConfig.pinSelect = base->SCLPinIndex; - timerConfig.pinPolarity = kFLEXIO_PinActiveHigh; - timerConfig.timerMode = kFLEXIO_TimerModeSingle16Bit; - timerConfig.timerOutput = kFLEXIO_TimerOutputZeroNotAffectedByReset; - timerConfig.timerDecrement = kFLEXIO_TimerDecSrcOnFlexIOClockShiftTimerOutput; - timerConfig.timerReset = kFLEXIO_TimerResetOnTimerPinEqualToTimerOutput; - timerConfig.timerDisable = kFLEXIO_TimerDisableOnPreTimerDisable; - timerConfig.timerEnable = kFLEXIO_TimerEnableOnTriggerHigh; - timerConfig.timerStop = kFLEXIO_TimerStopBitDisabled; - timerConfig.timerStart = kFLEXIO_TimerStartBitDisabled; - - /* Set TIMCMP = (baud rate divider / 2) - 1. */ - timerDiv = (uint16_t)(srcClock_Hz / masterConfig->baudRate_Bps) / 2U - 1U; - /* Calculate and assign the actual baudrate. */ - base->baudrate = srcClock_Hz / (2U * ((uint32_t)timerDiv + 1U)); - - timerConfig.timerCompare = timerDiv; - - FLEXIO_SetTimerConfig(base->flexioBase, base->timerIndex[1], &timerConfig); - - /* timer 0 is used to config total shift clock edges */ - timerConfig.triggerSelect = FLEXIO_TIMER_TRIGGER_SEL_SHIFTnSTAT(base->shifterIndex[0]); - timerConfig.triggerPolarity = kFLEXIO_TimerTriggerPolarityActiveLow; - timerConfig.triggerSource = kFLEXIO_TimerTriggerSourceInternal; - timerConfig.pinConfig = kFLEXIO_PinConfigOutputDisabled; - timerConfig.pinSelect = base->SCLPinIndex; - timerConfig.pinPolarity = kFLEXIO_PinActiveHigh; - timerConfig.timerMode = kFLEXIO_TimerModeSingle16Bit; - timerConfig.timerOutput = kFLEXIO_TimerOutputOneNotAffectedByReset; - timerConfig.timerDecrement = kFLEXIO_TimerDecSrcOnPinInputShiftPinInput; - timerConfig.timerReset = kFLEXIO_TimerResetNever; - timerConfig.timerDisable = kFLEXIO_TimerDisableOnTimerCompare; - timerConfig.timerEnable = kFLEXIO_TimerEnableOnTriggerHigh; - timerConfig.timerStop = kFLEXIO_TimerStopBitDisabled; - timerConfig.timerStart = kFLEXIO_TimerStartBitDisabled; - - /* Set TIMCMP when confinguring transfer bytes. */ - FLEXIO_SetTimerConfig(base->flexioBase, base->timerIndex[0], &timerConfig); - - /* 4. Configure the timer 2 for controlling shifters. */ - timerConfig.triggerSelect = FLEXIO_TIMER_TRIGGER_SEL_SHIFTnSTAT(base->shifterIndex[0]); - timerConfig.triggerPolarity = kFLEXIO_TimerTriggerPolarityActiveLow; - timerConfig.triggerSource = kFLEXIO_TimerTriggerSourceInternal; - timerConfig.pinConfig = kFLEXIO_PinConfigOutputDisabled; - timerConfig.pinSelect = base->SCLPinIndex; - timerConfig.pinPolarity = kFLEXIO_PinActiveLow; - timerConfig.timerMode = kFLEXIO_TimerModeSingle16Bit; - timerConfig.timerOutput = kFLEXIO_TimerOutputOneNotAffectedByReset; - timerConfig.timerDecrement = kFLEXIO_TimerDecSrcOnPinInputShiftPinInput; - timerConfig.timerReset = kFLEXIO_TimerResetNever; - timerConfig.timerDisable = kFLEXIO_TimerDisableOnPreTimerDisable; - timerConfig.timerEnable = kFLEXIO_TimerEnableOnPrevTimerEnable; - timerConfig.timerStop = kFLEXIO_TimerStopBitEnableOnTimerCompare; - timerConfig.timerStart = kFLEXIO_TimerStartBitEnabled; - - /* Set TIMCMP[15:0] = (number of bits x 2) - 1. */ - timerConfig.timerCompare = 8U * 2U - 1U; - - FLEXIO_SetTimerConfig(base->flexioBase, base->timerIndex[2], &timerConfig); - - /* Configure FLEXIO I2C Master. */ - controlVal = base->flexioBase->CTRL; - controlVal &= - ~(FLEXIO_CTRL_DOZEN_MASK | FLEXIO_CTRL_DBGE_MASK | FLEXIO_CTRL_FASTACC_MASK | FLEXIO_CTRL_FLEXEN_MASK); - controlVal |= (FLEXIO_CTRL_DBGE(masterConfig->enableInDebug) | FLEXIO_CTRL_FASTACC(masterConfig->enableFastAccess) | - FLEXIO_CTRL_FLEXEN(masterConfig->enableMaster)); - if (!masterConfig->enableInDoze) - { - controlVal |= FLEXIO_CTRL_DOZEN_MASK; - } - - base->flexioBase->CTRL = controlVal; - /* Disable internal IRQs. */ - FLEXIO_I2C_MasterDisableInterrupts( - base, (uint32_t)kFLEXIO_I2C_TxEmptyInterruptEnable | (uint32_t)kFLEXIO_I2C_RxFullInterruptEnable); - return result; -} - -/*! - * brief De-initializes the FlexIO I2C master peripheral. Calling this API Resets the FlexIO I2C master - * shifer and timer config, module can't work unless the FLEXIO_I2C_MasterInit is called. - * - * param base pointer to FLEXIO_I2C_Type structure. - */ -void FLEXIO_I2C_MasterDeinit(FLEXIO_I2C_Type *base) -{ - base->flexioBase->SHIFTCFG[base->shifterIndex[0]] = 0; - base->flexioBase->SHIFTCTL[base->shifterIndex[0]] = 0; - base->flexioBase->SHIFTCFG[base->shifterIndex[1]] = 0; - base->flexioBase->SHIFTCTL[base->shifterIndex[1]] = 0; - base->flexioBase->TIMCFG[base->timerIndex[0]] = 0; - base->flexioBase->TIMCMP[base->timerIndex[0]] = 0; - base->flexioBase->TIMCTL[base->timerIndex[0]] = 0; - base->flexioBase->TIMCFG[base->timerIndex[1]] = 0; - base->flexioBase->TIMCMP[base->timerIndex[1]] = 0; - base->flexioBase->TIMCTL[base->timerIndex[1]] = 0; - base->flexioBase->TIMCFG[base->timerIndex[2]] = 0; - base->flexioBase->TIMCMP[base->timerIndex[2]] = 0; - base->flexioBase->TIMCTL[base->timerIndex[2]] = 0; - /* Clear the shifter flag. */ - base->flexioBase->SHIFTSTAT = (1UL << base->shifterIndex[0]); - base->flexioBase->SHIFTSTAT = (1UL << base->shifterIndex[1]); - /* Clear the timer flag. */ - base->flexioBase->TIMSTAT = (1UL << base->timerIndex[0]); - base->flexioBase->TIMSTAT = (1UL << base->timerIndex[1]); - base->flexioBase->TIMSTAT = (1UL << base->timerIndex[2]); -} - -/*! - * brief Gets the default configuration to configure the FlexIO module. The configuration - * can be used directly for calling the FLEXIO_I2C_MasterInit(). - * - * Example: - code - flexio_i2c_master_config_t config; - FLEXIO_I2C_MasterGetDefaultConfig(&config); - endcode - * param masterConfig Pointer to flexio_i2c_master_config_t structure. -*/ -void FLEXIO_I2C_MasterGetDefaultConfig(flexio_i2c_master_config_t *masterConfig) -{ - assert(masterConfig != NULL); - - /* Initializes the configure structure to zero. */ - (void)memset(masterConfig, 0, sizeof(*masterConfig)); - - masterConfig->enableMaster = true; - masterConfig->enableInDoze = false; - masterConfig->enableInDebug = true; - masterConfig->enableFastAccess = false; - - /* Default baud rate at 100kbps. */ - masterConfig->baudRate_Bps = 100000U; -} - -/*! - * brief Gets the FlexIO I2C master status flags. - * - * param base Pointer to FLEXIO_I2C_Type structure - * return Status flag, use status flag to AND #_flexio_i2c_master_status_flags can get the related status. - */ - -uint32_t FLEXIO_I2C_MasterGetStatusFlags(FLEXIO_I2C_Type *base) -{ - uint32_t status = 0; - - status = - ((FLEXIO_GetShifterStatusFlags(base->flexioBase) & (1UL << base->shifterIndex[0])) >> base->shifterIndex[0]); - status |= - (((FLEXIO_GetShifterStatusFlags(base->flexioBase) & (1UL << base->shifterIndex[1])) >> (base->shifterIndex[1])) - << 1U); - status |= - (((FLEXIO_GetShifterErrorFlags(base->flexioBase) & (1UL << base->shifterIndex[1])) >> (base->shifterIndex[1])) - << 2U); - - return status; -} - -/*! - * brief Clears the FlexIO I2C master status flags. - * - * param base Pointer to FLEXIO_I2C_Type structure. - * param mask Status flag. - * The parameter can be any combination of the following values: - * arg kFLEXIO_I2C_RxFullFlag - * arg kFLEXIO_I2C_ReceiveNakFlag - */ - -void FLEXIO_I2C_MasterClearStatusFlags(FLEXIO_I2C_Type *base, uint32_t mask) -{ - if ((mask & (uint32_t)kFLEXIO_I2C_TxEmptyFlag) != 0U) - { - FLEXIO_ClearShifterStatusFlags(base->flexioBase, 1UL << base->shifterIndex[0]); - } - - if ((mask & (uint32_t)kFLEXIO_I2C_RxFullFlag) != 0U) - { - FLEXIO_ClearShifterStatusFlags(base->flexioBase, 1UL << base->shifterIndex[1]); - } - - if ((mask & (uint32_t)kFLEXIO_I2C_ReceiveNakFlag) != 0U) - { - FLEXIO_ClearShifterErrorFlags(base->flexioBase, 1UL << base->shifterIndex[1]); - } -} - -/*! - * brief Enables the FlexIO i2c master interrupt requests. - * - * param base Pointer to FLEXIO_I2C_Type structure. - * param mask Interrupt source. - * Currently only one interrupt request source: - * arg kFLEXIO_I2C_TransferCompleteInterruptEnable - */ -void FLEXIO_I2C_MasterEnableInterrupts(FLEXIO_I2C_Type *base, uint32_t mask) -{ - if ((mask & (uint32_t)kFLEXIO_I2C_TxEmptyInterruptEnable) != 0U) - { - FLEXIO_EnableShifterStatusInterrupts(base->flexioBase, 1UL << base->shifterIndex[0]); - } - if ((mask & (uint32_t)kFLEXIO_I2C_RxFullInterruptEnable) != 0U) - { - FLEXIO_EnableShifterStatusInterrupts(base->flexioBase, 1UL << base->shifterIndex[1]); - } -} - -/*! - * brief Disables the FlexIO I2C master interrupt requests. - * - * param base Pointer to FLEXIO_I2C_Type structure. - * param mask Interrupt source. - */ -void FLEXIO_I2C_MasterDisableInterrupts(FLEXIO_I2C_Type *base, uint32_t mask) -{ - if ((mask & (uint32_t)kFLEXIO_I2C_TxEmptyInterruptEnable) != 0U) - { - FLEXIO_DisableShifterStatusInterrupts(base->flexioBase, 1UL << base->shifterIndex[0]); - } - if ((mask & (uint32_t)kFLEXIO_I2C_RxFullInterruptEnable) != 0U) - { - FLEXIO_DisableShifterStatusInterrupts(base->flexioBase, 1UL << base->shifterIndex[1]); - } -} - -/*! - * brief Sets the FlexIO I2C master transfer baudrate. - * - * param base Pointer to FLEXIO_I2C_Type structure - * param baudRate_Bps the baud rate value in HZ - * param srcClock_Hz source clock in HZ - */ -void FLEXIO_I2C_MasterSetBaudRate(FLEXIO_I2C_Type *base, uint32_t baudRate_Bps, uint32_t srcClock_Hz) -{ - uint16_t timerDiv = 0; - FLEXIO_Type *flexioBase = base->flexioBase; - - /* Set TIMCMP = (baud rate divider / 2) - 1.*/ - timerDiv = (uint16_t)((srcClock_Hz / baudRate_Bps) / 2U - 1U); - - flexioBase->TIMCMP[base->timerIndex[1]] = timerDiv; - - /* Calculate and assign the actual baudrate. */ - base->baudrate = srcClock_Hz / (2U * ((uint32_t)timerDiv + 1U)); -} - -/*! - * brief Sets the number of bytes to be transferred from a start signal to a stop signal. - * - * note Call this API before a transfer begins because the timer generates a number of clocks according - * to the number of bytes that need to be transferred. - * - * param base Pointer to FLEXIO_I2C_Type structure. - * param count Number of bytes need to be transferred from a start signal to a re-start/stop signal - * retval kStatus_Success Successfully configured the count. - * retval kStatus_InvalidArgument Input argument is invalid. - */ -status_t FLEXIO_I2C_MasterSetTransferCount(FLEXIO_I2C_Type *base, uint16_t count) -{ - /* Calculate whether the transfer count is larger than the max value compare register can achieve */ - if (count > ((0xFFFFUL - 1UL) / (16UL + 1UL + 1UL))) - { - return kStatus_InvalidArgument; - } - - uint32_t timerConfig = 0U; - FLEXIO_Type *flexioBase = base->flexioBase; - - flexioBase->TIMCMP[base->timerIndex[0]] = (uint32_t)count * 18U + 1U; - timerConfig = flexioBase->TIMCFG[base->timerIndex[0]]; - timerConfig &= ~FLEXIO_TIMCFG_TIMDIS_MASK; - timerConfig |= FLEXIO_TIMCFG_TIMDIS(kFLEXIO_TimerDisableOnTimerCompare); - flexioBase->TIMCFG[base->timerIndex[0]] = timerConfig; - - return kStatus_Success; -} - -/*! - * brief Sends START + 7-bit address to the bus. - * - * note This API should be called when the transfer configuration is ready to send a START signal - * and 7-bit address to the bus. This is a non-blocking API, which returns directly after the address - * is put into the data register but the address transfer is not finished on the bus. Ensure that - * the kFLEXIO_I2C_RxFullFlag status is asserted before calling this API. - * param base Pointer to FLEXIO_I2C_Type structure. - * param address 7-bit address. - * param direction transfer direction. - * This parameter is one of the values in flexio_i2c_direction_t: - * arg kFLEXIO_I2C_Write: Transmit - * arg kFLEXIO_I2C_Read: Receive - */ - -void FLEXIO_I2C_MasterStart(FLEXIO_I2C_Type *base, uint8_t address, flexio_i2c_direction_t direction) -{ - uint32_t data; - - data = ((uint32_t)address) << 1U | ((direction == kFLEXIO_I2C_Read) ? 1U : 0U); - - FLEXIO_I2C_MasterWriteByte(base, data); -} - -/*! - * brief Sends the repeated start signal on the bus. - * - * param base Pointer to FLEXIO_I2C_Type structure. - */ -void FLEXIO_I2C_MasterRepeatedStart(FLEXIO_I2C_Type *base) -{ - /* Prepare for RESTART condition, no stop.*/ - FLEXIO_I2C_MasterWriteByte(base, 0xFFFFFFFFU); -} - -/*! - * brief Sends the stop signal on the bus. - * - * param base Pointer to FLEXIO_I2C_Type structure. - */ -void FLEXIO_I2C_MasterStop(FLEXIO_I2C_Type *base) -{ - /* Prepare normal stop. */ - (void)FLEXIO_I2C_MasterSetTransferCount(base, 0x0U); - FLEXIO_I2C_MasterWriteByte(base, 0x0U); -} - -/*! - * brief Sends the stop signal when transfer is still on-going. - * - * param base Pointer to FLEXIO_I2C_Type structure. - */ -void FLEXIO_I2C_MasterAbortStop(FLEXIO_I2C_Type *base) -{ - uint32_t tmpConfig; - - /* Prepare abort stop. */ - /* Disable timer 0. */ - tmpConfig = base->flexioBase->TIMCFG[base->timerIndex[0]]; - tmpConfig &= ~FLEXIO_TIMCFG_TIMDIS_MASK; - tmpConfig |= FLEXIO_TIMCFG_TIMDIS(kFLEXIO_TimerDisableOnPinBothEdge); - base->flexioBase->TIMCFG[base->timerIndex[0]] = tmpConfig; - - /* Disable timer 1. */ - tmpConfig = base->flexioBase->TIMCFG[base->timerIndex[1]]; - tmpConfig &= ~FLEXIO_TIMCFG_TIMDIS_MASK; - tmpConfig |= FLEXIO_TIMCFG_TIMDIS(kFLEXIO_TimerDisableOnPinBothEdge); - base->flexioBase->TIMCFG[base->timerIndex[1]] = tmpConfig; -} - -/*! - * brief Configures the sent ACK/NAK for the following byte. - * - * param base Pointer to FLEXIO_I2C_Type structure. - * param enable True to configure send ACK, false configure to send NAK. - */ -void FLEXIO_I2C_MasterEnableAck(FLEXIO_I2C_Type *base, bool enable) -{ - uint32_t tmpConfig = 0; - - tmpConfig = base->flexioBase->SHIFTCFG[base->shifterIndex[0]]; - tmpConfig &= ~FLEXIO_SHIFTCFG_SSTOP_MASK; - if (enable) - { - tmpConfig |= FLEXIO_SHIFTCFG_SSTOP(kFLEXIO_ShifterStopBitLow); - } - else - { - tmpConfig |= FLEXIO_SHIFTCFG_SSTOP(kFLEXIO_ShifterStopBitHigh); - } - base->flexioBase->SHIFTCFG[base->shifterIndex[0]] = tmpConfig; -} - -/*! - * brief Sends a buffer of data in bytes. - * - * note This function blocks via polling until all bytes have been sent. - * - * param base Pointer to FLEXIO_I2C_Type structure. - * param txBuff The data bytes to send. - * param txSize The number of data bytes to send. - * retval kStatus_Success Successfully write data. - * retval kStatus_FLEXIO_I2C_Nak Receive NAK during writing data. - * retval kStatus_FLEXIO_I2C_Timeout Timeout polling status flags. - */ -status_t FLEXIO_I2C_MasterWriteBlocking(FLEXIO_I2C_Type *base, const uint8_t *txBuff, uint8_t txSize) -{ - assert(txBuff != NULL); - assert(txSize != 0U); - - uint32_t status; -#if I2C_RETRY_TIMES - uint32_t waitTimes = I2C_RETRY_TIMES; -#endif - - while (0U != txSize--) - { - FLEXIO_I2C_MasterWriteByte(base, *txBuff++); - - /* Wait until data transfer complete. */ -#if I2C_RETRY_TIMES - waitTimes = I2C_RETRY_TIMES; - while ((0U == ((status = FLEXIO_I2C_MasterGetStatusFlags(base)) & (uint32_t)kFLEXIO_I2C_RxFullFlag)) && - (0U != --waitTimes)) - { - } - if (0U == waitTimes) - { - return kStatus_FLEXIO_I2C_Timeout; - } -#else - while (0U == ((status = FLEXIO_I2C_MasterGetStatusFlags(base)) & (uint32_t)kFLEXIO_I2C_RxFullFlag)) - { - } -#endif - - if ((status & (uint32_t)kFLEXIO_I2C_ReceiveNakFlag) != 0U) - { - FLEXIO_ClearShifterErrorFlags(base->flexioBase, 1UL << base->shifterIndex[1]); - return kStatus_FLEXIO_I2C_Nak; - } - } - return kStatus_Success; -} - -/*! - * brief Receives a buffer of bytes. - * - * note This function blocks via polling until all bytes have been received. - * - * param base Pointer to FLEXIO_I2C_Type structure. - * param rxBuff The buffer to store the received bytes. - * param rxSize The number of data bytes to be received. - * retval kStatus_Success Successfully read data. - * retval kStatus_FLEXIO_I2C_Timeout Timeout polling status flags. - */ -status_t FLEXIO_I2C_MasterReadBlocking(FLEXIO_I2C_Type *base, uint8_t *rxBuff, uint8_t rxSize) -{ - assert(rxBuff != NULL); - assert(rxSize != 0U); - -#if I2C_RETRY_TIMES - uint32_t waitTimes = I2C_RETRY_TIMES; -#endif - - while (0U != rxSize--) - { - /* Wait until data transfer complete. */ -#if I2C_RETRY_TIMES - waitTimes = I2C_RETRY_TIMES; - while ((0U == (FLEXIO_I2C_MasterGetStatusFlags(base) & (uint32_t)kFLEXIO_I2C_RxFullFlag)) && - (0U != --waitTimes)) - { - } - if (0U == waitTimes) - { - return kStatus_FLEXIO_I2C_Timeout; - } -#else - while (0U == (FLEXIO_I2C_MasterGetStatusFlags(base) & (uint32_t)kFLEXIO_I2C_RxFullFlag)) - { - } -#endif - *rxBuff++ = FLEXIO_I2C_MasterReadByte(base); - } - return kStatus_Success; -} - -/*! - * brief Performs a master polling transfer on the I2C bus. - * - * note The API does not return until the transfer succeeds or fails due - * to receiving NAK. - * - * param base pointer to FLEXIO_I2C_Type structure. - * param xfer pointer to flexio_i2c_master_transfer_t structure. - * return status of status_t. - */ -status_t FLEXIO_I2C_MasterTransferBlocking(FLEXIO_I2C_Type *base, flexio_i2c_master_transfer_t *xfer) -{ - assert(xfer != NULL); - -#if defined(FSL_FEATURE_FLEXIO_HAS_PIN_STATUS) && FSL_FEATURE_FLEXIO_HAS_PIN_STATUS - /* Return an error if the bus is already in use not by us.*/ - status_t status = FLEXIO_I2C_CheckForBusyBus(base); - if (status != kStatus_Success) - { - return status; - } -#endif /*FSL_FEATURE_FLEXIO_HAS_PIN_STATUS*/ - - flexio_i2c_master_handle_t tmpHandle; - uint32_t statusFlags; - status_t result = kStatus_Success; -#if I2C_RETRY_TIMES - uint32_t waitTimes = I2C_RETRY_TIMES; -#endif - - /* Zero the handle. */ - (void)memset(&tmpHandle, 0, sizeof(tmpHandle)); - - /* Set up transfer machine. */ - result = FLEXIO_I2C_MasterTransferInitStateMachine(base, &tmpHandle, xfer); - if (result != kStatus_Success) - { - return result; - } - - do - { - /* Wait either tx empty or rx full flag is asserted. */ -#if I2C_RETRY_TIMES - waitTimes = I2C_RETRY_TIMES; - while ((0U == ((statusFlags = FLEXIO_I2C_MasterGetStatusFlags(base)) & - ((uint32_t)kFLEXIO_I2C_TxEmptyFlag | (uint32_t)kFLEXIO_I2C_RxFullFlag))) && - (0U != --waitTimes)) - { - } - if (0U == waitTimes) - { - return kStatus_FLEXIO_I2C_Timeout; - } -#else - while (0U == ((statusFlags = FLEXIO_I2C_MasterGetStatusFlags(base)) & - ((uint32_t)kFLEXIO_I2C_TxEmptyFlag | (uint32_t)kFLEXIO_I2C_RxFullFlag))) - { - } -#endif - FLEXIO_ClearTimerStatusFlags(base->flexioBase, ((1UL << base->timerIndex[0]) | (1UL << base->timerIndex[1]))); - result = FLEXIO_I2C_MasterTransferRunStateMachine(base, &tmpHandle, statusFlags); - - } while ((tmpHandle.state != (uint8_t)kFLEXIO_I2C_Idle) && (result == kStatus_Success)); - - /* Timer disable on timer compare, wait until bit clock TSF set, which means timer disable and stop has been sent. - */ - while (0U == (FLEXIO_GetTimerStatusFlags(base->flexioBase) & (1UL << base->timerIndex[1]))) - { - } - - return result; -} - -/*! - * brief Initializes the I2C handle which is used in transactional functions. - * - * param base Pointer to FLEXIO_I2C_Type structure. - * param handle Pointer to flexio_i2c_master_handle_t structure to store the transfer state. - * param callback Pointer to user callback function. - * param userData User param passed to the callback function. - * retval kStatus_Success Successfully create the handle. - * retval kStatus_OutOfRange The FlexIO type/handle/isr table out of range. - */ -status_t FLEXIO_I2C_MasterTransferCreateHandle(FLEXIO_I2C_Type *base, - flexio_i2c_master_handle_t *handle, - flexio_i2c_master_transfer_callback_t callback, - void *userData) -{ - assert(handle != NULL); - - IRQn_Type flexio_irqs[] = FLEXIO_IRQS; - - /* Zero the handle. */ - (void)memset(handle, 0, sizeof(*handle)); - - /* Register callback and userData. */ - handle->completionCallback = callback; - handle->userData = userData; - - /* Clear pending NVIC IRQ before enable NVIC IRQ. */ - NVIC_ClearPendingIRQ(flexio_irqs[FLEXIO_I2C_GetInstance(base)]); - (void)EnableIRQ(flexio_irqs[FLEXIO_I2C_GetInstance(base)]); - - /* Save the context in global variables to support the double weak mechanism. */ - return FLEXIO_RegisterHandleIRQ(base, handle, FLEXIO_I2C_MasterTransferHandleIRQ); -} - -/*! - * brief Performs a master interrupt non-blocking transfer on the I2C bus. - * - * note The API returns immediately after the transfer initiates. - * Call FLEXIO_I2C_MasterTransferGetCount to poll the transfer status to check whether - * the transfer is finished. If the return status is not kStatus_FLEXIO_I2C_Busy, the transfer - * is finished. - * - * param base Pointer to FLEXIO_I2C_Type structure - * param handle Pointer to flexio_i2c_master_handle_t structure which stores the transfer state - * param xfer pointer to flexio_i2c_master_transfer_t structure - * retval kStatus_Success Successfully start a transfer. - * retval kStatus_FLEXIO_I2C_Busy FlexIO I2C is not idle, is running another transfer. - */ -status_t FLEXIO_I2C_MasterTransferNonBlocking(FLEXIO_I2C_Type *base, - flexio_i2c_master_handle_t *handle, - flexio_i2c_master_transfer_t *xfer) -{ - assert(handle != NULL); - assert(xfer != NULL); - - status_t result = kStatus_Success; - -#if defined(FSL_FEATURE_FLEXIO_HAS_PIN_STATUS) && FSL_FEATURE_FLEXIO_HAS_PIN_STATUS - /* Return an error if the bus is already in use not by us.*/ - result = FLEXIO_I2C_CheckForBusyBus(base); - if (result != kStatus_Success) - { - return result; - } -#endif /*FSL_FEATURE_FLEXIO_HAS_PIN_STATUS*/ - - if (handle->state != (uint8_t)kFLEXIO_I2C_Idle) - { - return kStatus_FLEXIO_I2C_Busy; - } - else - { - /* Set up transfer machine. */ - result = FLEXIO_I2C_MasterTransferInitStateMachine(base, handle, xfer); - if (result != kStatus_Success) - { - return result; - } - - /* Enable both tx empty and rxfull interrupt. */ - FLEXIO_I2C_MasterEnableInterrupts( - base, (uint32_t)kFLEXIO_I2C_TxEmptyInterruptEnable | (uint32_t)kFLEXIO_I2C_RxFullInterruptEnable); - - return kStatus_Success; - } -} - -/*! - * brief Aborts an interrupt non-blocking transfer early. - * - * note This API can be called at any time when an interrupt non-blocking transfer initiates - * to abort the transfer early. - * - * param base Pointer to FLEXIO_I2C_Type structure - * param handle Pointer to flexio_i2c_master_handle_t structure which stores the transfer state - */ -void FLEXIO_I2C_MasterTransferAbort(FLEXIO_I2C_Type *base, flexio_i2c_master_handle_t *handle) -{ - assert(handle != NULL); - - /* Disable interrupts. */ - FLEXIO_I2C_MasterDisableInterrupts( - base, (uint32_t)kFLEXIO_I2C_TxEmptyInterruptEnable | (uint32_t)kFLEXIO_I2C_RxFullInterruptEnable); - - /* Reset to idle state. */ - handle->state = (uint8_t)kFLEXIO_I2C_Idle; -} - -/*! - * brief Gets the master transfer status during a interrupt non-blocking transfer. - * - * param base Pointer to FLEXIO_I2C_Type structure. - * param handle Pointer to flexio_i2c_master_handle_t structure which stores the transfer state. - * param count Number of bytes transferred so far by the non-blocking transaction. - * retval kStatus_InvalidArgument count is Invalid. - * retval kStatus_NoTransferInProgress There is not a non-blocking transaction currently in progress. - * retval kStatus_Success Successfully return the count. - */ -status_t FLEXIO_I2C_MasterTransferGetCount(FLEXIO_I2C_Type *base, flexio_i2c_master_handle_t *handle, size_t *count) -{ - if (NULL == count) - { - return kStatus_InvalidArgument; - } - - /* Catch when there is not an active transfer. */ - if (handle->state == (uint8_t)kFLEXIO_I2C_Idle) - { - *count = 0; - return kStatus_NoTransferInProgress; - } - - *count = handle->transferSize - handle->transfer.dataSize; - - return kStatus_Success; -} - -/*! - * brief Master interrupt handler. - * - * param i2cType Pointer to FLEXIO_I2C_Type structure - * param i2cHandle Pointer to flexio_i2c_master_transfer_t structure - */ -void FLEXIO_I2C_MasterTransferHandleIRQ(void *i2cType, void *i2cHandle) -{ - FLEXIO_I2C_Type *base = (FLEXIO_I2C_Type *)i2cType; - flexio_i2c_master_handle_t *handle = (flexio_i2c_master_handle_t *)i2cHandle; - uint32_t statusFlags; - status_t result; - - statusFlags = FLEXIO_I2C_MasterGetStatusFlags(base); - - result = FLEXIO_I2C_MasterTransferRunStateMachine(base, handle, statusFlags); - - if (handle->state == (uint8_t)kFLEXIO_I2C_Idle) - { - FLEXIO_I2C_MasterTransferComplete(base, handle, result); - } -} |