| /* |
| * Copyright (c) 2015, Freescale Semiconductor, Inc. |
| * Copyright 2016-2017 NXP |
| * All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| #include "fsl_flexio.h" |
| |
| /******************************************************************************* |
| * Definitions |
| ******************************************************************************/ |
| |
| /* Component ID definition, used by tools. */ |
| #ifndef FSL_COMPONENT_ID |
| #define FSL_COMPONENT_ID "platform.drivers.flexio" |
| #endif |
| |
| /*< @brief user configurable flexio handle count. */ |
| #define FLEXIO_HANDLE_COUNT 2 |
| |
| /******************************************************************************* |
| * Variables |
| ******************************************************************************/ |
| /*! @brief Pointers to flexio bases for each instance. */ |
| FLEXIO_Type *const s_flexioBases[] = FLEXIO_BASE_PTRS; |
| |
| #if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) |
| /*! @brief Pointers to flexio clocks for each instance. */ |
| const clock_ip_name_t s_flexioClocks[] = FLEXIO_CLOCKS; |
| #endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */ |
| |
| /*< @brief pointer to array of FLEXIO handle. */ |
| static void *s_flexioHandle[FLEXIO_HANDLE_COUNT]; |
| |
| /*< @brief pointer to array of FLEXIO IP types. */ |
| static void *s_flexioType[FLEXIO_HANDLE_COUNT]; |
| |
| /*< @brief pointer to array of FLEXIO Isr. */ |
| static flexio_isr_t s_flexioIsr[FLEXIO_HANDLE_COUNT]; |
| |
| /******************************************************************************* |
| * Codes |
| ******************************************************************************/ |
| |
| /*! |
| * brief Get instance number for FLEXIO module. |
| * |
| * param base FLEXIO peripheral base address. |
| */ |
| uint32_t FLEXIO_GetInstance(FLEXIO_Type *base) |
| { |
| uint32_t instance; |
| |
| /* Find the instance index from base address mappings. */ |
| for (instance = 0; instance < ARRAY_SIZE(s_flexioBases); instance++) |
| { |
| if (s_flexioBases[instance] == base) |
| { |
| break; |
| } |
| } |
| |
| assert(instance < ARRAY_SIZE(s_flexioBases)); |
| |
| return instance; |
| } |
| |
| /*! |
| * brief Configures the FlexIO with a FlexIO configuration. The configuration structure |
| * can be filled by the user or be set with default values by FLEXIO_GetDefaultConfig(). |
| * |
| * Example |
| code |
| flexio_config_t config = { |
| .enableFlexio = true, |
| .enableInDoze = false, |
| .enableInDebug = true, |
| .enableFastAccess = false |
| }; |
| FLEXIO_Configure(base, &config); |
| endcode |
| * |
| * param base FlexIO peripheral base address |
| * param userConfig pointer to flexio_config_t structure |
| */ |
| void FLEXIO_Init(FLEXIO_Type *base, const flexio_config_t *userConfig) |
| { |
| uint32_t ctrlReg = 0; |
| |
| #if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) |
| CLOCK_EnableClock(s_flexioClocks[FLEXIO_GetInstance(base)]); |
| #endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */ |
| |
| FLEXIO_Reset(base); |
| |
| ctrlReg = base->CTRL; |
| ctrlReg &= ~(FLEXIO_CTRL_DOZEN_MASK | FLEXIO_CTRL_DBGE_MASK | FLEXIO_CTRL_FASTACC_MASK | FLEXIO_CTRL_FLEXEN_MASK); |
| ctrlReg |= (FLEXIO_CTRL_DBGE(userConfig->enableInDebug) | FLEXIO_CTRL_FASTACC(userConfig->enableFastAccess) | |
| FLEXIO_CTRL_FLEXEN(userConfig->enableFlexio)); |
| if (!userConfig->enableInDoze) |
| { |
| ctrlReg |= FLEXIO_CTRL_DOZEN_MASK; |
| } |
| |
| base->CTRL = ctrlReg; |
| } |
| |
| /*! |
| * brief Gates the FlexIO clock. Call this API to stop the FlexIO clock. |
| * |
| * note After calling this API, call the FLEXO_Init to use the FlexIO module. |
| * |
| * param base FlexIO peripheral base address |
| */ |
| void FLEXIO_Deinit(FLEXIO_Type *base) |
| { |
| FLEXIO_Enable(base, false); |
| #if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) |
| CLOCK_DisableClock(s_flexioClocks[FLEXIO_GetInstance(base)]); |
| #endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */ |
| } |
| |
| /*! |
| * brief Gets the default configuration to configure the FlexIO module. The configuration |
| * can used directly to call the FLEXIO_Configure(). |
| * |
| * Example: |
| code |
| flexio_config_t config; |
| FLEXIO_GetDefaultConfig(&config); |
| endcode |
| * |
| * param userConfig pointer to flexio_config_t structure |
| */ |
| void FLEXIO_GetDefaultConfig(flexio_config_t *userConfig) |
| { |
| assert(userConfig); |
| |
| /* Initializes the configure structure to zero. */ |
| memset(userConfig, 0, sizeof(*userConfig)); |
| |
| userConfig->enableFlexio = true; |
| userConfig->enableInDoze = false; |
| userConfig->enableInDebug = true; |
| userConfig->enableFastAccess = false; |
| } |
| |
| /*! |
| * brief Resets the FlexIO module. |
| * |
| * param base FlexIO peripheral base address |
| */ |
| void FLEXIO_Reset(FLEXIO_Type *base) |
| { |
| /*do software reset, software reset operation affect all other FLEXIO registers except CTRL*/ |
| base->CTRL |= FLEXIO_CTRL_SWRST_MASK; |
| base->CTRL = 0; |
| } |
| |
| /*! |
| * brief Gets the shifter buffer address for the DMA transfer usage. |
| * |
| * param base FlexIO peripheral base address |
| * param type Shifter type of flexio_shifter_buffer_type_t |
| * param index Shifter index |
| * return Corresponding shifter buffer index |
| */ |
| uint32_t FLEXIO_GetShifterBufferAddress(FLEXIO_Type *base, flexio_shifter_buffer_type_t type, uint8_t index) |
| { |
| assert(index < FLEXIO_SHIFTBUF_COUNT); |
| |
| uint32_t address = 0; |
| |
| switch (type) |
| { |
| case kFLEXIO_ShifterBuffer: |
| address = (uint32_t) & (base->SHIFTBUF[index]); |
| break; |
| |
| case kFLEXIO_ShifterBufferBitSwapped: |
| address = (uint32_t) & (base->SHIFTBUFBIS[index]); |
| break; |
| |
| case kFLEXIO_ShifterBufferByteSwapped: |
| address = (uint32_t) & (base->SHIFTBUFBYS[index]); |
| break; |
| |
| case kFLEXIO_ShifterBufferBitByteSwapped: |
| address = (uint32_t) & (base->SHIFTBUFBBS[index]); |
| break; |
| |
| #if defined(FSL_FEATURE_FLEXIO_HAS_SHFT_BUFFER_NIBBLE_BYTE_SWAP) && FSL_FEATURE_FLEXIO_HAS_SHFT_BUFFER_NIBBLE_BYTE_SWAP |
| case kFLEXIO_ShifterBufferNibbleByteSwapped: |
| address = (uint32_t) & (base->SHIFTBUFNBS[index]); |
| break; |
| |
| #endif |
| #if defined(FSL_FEATURE_FLEXIO_HAS_SHFT_BUFFER_HALF_WORD_SWAP) && FSL_FEATURE_FLEXIO_HAS_SHFT_BUFFER_HALF_WORD_SWAP |
| case kFLEXIO_ShifterBufferHalfWordSwapped: |
| address = (uint32_t) & (base->SHIFTBUFHWS[index]); |
| break; |
| |
| #endif |
| #if defined(FSL_FEATURE_FLEXIO_HAS_SHFT_BUFFER_NIBBLE_SWAP) && FSL_FEATURE_FLEXIO_HAS_SHFT_BUFFER_NIBBLE_SWAP |
| case kFLEXIO_ShifterBufferNibbleSwapped: |
| address = (uint32_t) & (base->SHIFTBUFNIS[index]); |
| break; |
| |
| #endif |
| default: |
| break; |
| } |
| return address; |
| } |
| |
| /*! |
| * brief Configures the shifter with the shifter configuration. The configuration structure |
| * covers both the SHIFTCTL and SHIFTCFG registers. To configure the shifter to the proper |
| * mode, select which timer controls the shifter to shift, whether to generate start bit/stop |
| * bit, and the polarity of start bit and stop bit. |
| * |
| * Example |
| code |
| flexio_shifter_config_t config = { |
| .timerSelect = 0, |
| .timerPolarity = kFLEXIO_ShifterTimerPolarityOnPositive, |
| .pinConfig = kFLEXIO_PinConfigOpenDrainOrBidirection, |
| .pinPolarity = kFLEXIO_PinActiveLow, |
| .shifterMode = kFLEXIO_ShifterModeTransmit, |
| .inputSource = kFLEXIO_ShifterInputFromPin, |
| .shifterStop = kFLEXIO_ShifterStopBitHigh, |
| .shifterStart = kFLEXIO_ShifterStartBitLow |
| }; |
| FLEXIO_SetShifterConfig(base, &config); |
| endcode |
| * |
| * param base FlexIO peripheral base address |
| * param index Shifter index |
| * param shifterConfig Pointer to flexio_shifter_config_t structure |
| */ |
| void FLEXIO_SetShifterConfig(FLEXIO_Type *base, uint8_t index, const flexio_shifter_config_t *shifterConfig) |
| { |
| base->SHIFTCFG[index] = FLEXIO_SHIFTCFG_INSRC(shifterConfig->inputSource) |
| #if FSL_FEATURE_FLEXIO_HAS_PARALLEL_WIDTH |
| | FLEXIO_SHIFTCFG_PWIDTH(shifterConfig->parallelWidth) |
| #endif /* FSL_FEATURE_FLEXIO_HAS_PARALLEL_WIDTH */ |
| | FLEXIO_SHIFTCFG_SSTOP(shifterConfig->shifterStop) | |
| FLEXIO_SHIFTCFG_SSTART(shifterConfig->shifterStart); |
| |
| base->SHIFTCTL[index] = |
| FLEXIO_SHIFTCTL_TIMSEL(shifterConfig->timerSelect) | FLEXIO_SHIFTCTL_TIMPOL(shifterConfig->timerPolarity) | |
| FLEXIO_SHIFTCTL_PINCFG(shifterConfig->pinConfig) | FLEXIO_SHIFTCTL_PINSEL(shifterConfig->pinSelect) | |
| FLEXIO_SHIFTCTL_PINPOL(shifterConfig->pinPolarity) | FLEXIO_SHIFTCTL_SMOD(shifterConfig->shifterMode); |
| } |
| |
| /*! |
| * brief Configures the timer with the timer configuration. The configuration structure |
| * covers both the TIMCTL and TIMCFG registers. To configure the timer to the proper |
| * mode, select trigger source for timer and the timer pin output and the timing for timer. |
| * |
| * Example |
| code |
| flexio_timer_config_t config = { |
| .triggerSelect = FLEXIO_TIMER_TRIGGER_SEL_SHIFTnSTAT(0), |
| .triggerPolarity = kFLEXIO_TimerTriggerPolarityActiveLow, |
| .triggerSource = kFLEXIO_TimerTriggerSourceInternal, |
| .pinConfig = kFLEXIO_PinConfigOpenDrainOrBidirection, |
| .pinSelect = 0, |
| .pinPolarity = kFLEXIO_PinActiveHigh, |
| .timerMode = kFLEXIO_TimerModeDual8BitBaudBit, |
| .timerOutput = kFLEXIO_TimerOutputZeroNotAffectedByReset, |
| .timerDecrement = kFLEXIO_TimerDecSrcOnFlexIOClockShiftTimerOutput, |
| .timerReset = kFLEXIO_TimerResetOnTimerPinEqualToTimerOutput, |
| .timerDisable = kFLEXIO_TimerDisableOnTimerCompare, |
| .timerEnable = kFLEXIO_TimerEnableOnTriggerHigh, |
| .timerStop = kFLEXIO_TimerStopBitEnableOnTimerDisable, |
| .timerStart = kFLEXIO_TimerStartBitEnabled |
| }; |
| FLEXIO_SetTimerConfig(base, &config); |
| endcode |
| * |
| * param base FlexIO peripheral base address |
| * param index Timer index |
| * param timerConfig Pointer to the flexio_timer_config_t structure |
| */ |
| void FLEXIO_SetTimerConfig(FLEXIO_Type *base, uint8_t index, const flexio_timer_config_t *timerConfig) |
| { |
| base->TIMCFG[index] = |
| FLEXIO_TIMCFG_TIMOUT(timerConfig->timerOutput) | FLEXIO_TIMCFG_TIMDEC(timerConfig->timerDecrement) | |
| FLEXIO_TIMCFG_TIMRST(timerConfig->timerReset) | FLEXIO_TIMCFG_TIMDIS(timerConfig->timerDisable) | |
| FLEXIO_TIMCFG_TIMENA(timerConfig->timerEnable) | FLEXIO_TIMCFG_TSTOP(timerConfig->timerStop) | |
| FLEXIO_TIMCFG_TSTART(timerConfig->timerStart); |
| |
| base->TIMCMP[index] = FLEXIO_TIMCMP_CMP(timerConfig->timerCompare); |
| |
| base->TIMCTL[index] = FLEXIO_TIMCTL_TRGSEL(timerConfig->triggerSelect) | |
| FLEXIO_TIMCTL_TRGPOL(timerConfig->triggerPolarity) | |
| FLEXIO_TIMCTL_TRGSRC(timerConfig->triggerSource) | |
| FLEXIO_TIMCTL_PINCFG(timerConfig->pinConfig) | FLEXIO_TIMCTL_PINSEL(timerConfig->pinSelect) | |
| FLEXIO_TIMCTL_PINPOL(timerConfig->pinPolarity) | FLEXIO_TIMCTL_TIMOD(timerConfig->timerMode); |
| } |
| |
| /*! |
| * brief Registers the handle and the interrupt handler for the FlexIO-simulated peripheral. |
| * |
| * param base Pointer to the FlexIO simulated peripheral type. |
| * param handle Pointer to the handler for FlexIO simulated peripheral. |
| * param isr FlexIO simulated peripheral interrupt handler. |
| * retval kStatus_Success Successfully create the handle. |
| * retval kStatus_OutOfRange The FlexIO type/handle/ISR table out of range. |
| */ |
| status_t FLEXIO_RegisterHandleIRQ(void *base, void *handle, flexio_isr_t isr) |
| { |
| assert(base); |
| assert(handle); |
| assert(isr); |
| |
| uint8_t index = 0; |
| |
| /* Find the an empty handle pointer to store the handle. */ |
| for (index = 0; index < FLEXIO_HANDLE_COUNT; index++) |
| { |
| if (s_flexioHandle[index] == NULL) |
| { |
| /* Register FLEXIO simulated driver base, handle and isr. */ |
| s_flexioType[index] = base; |
| s_flexioHandle[index] = handle; |
| s_flexioIsr[index] = isr; |
| break; |
| } |
| } |
| |
| if (index == FLEXIO_HANDLE_COUNT) |
| { |
| return kStatus_OutOfRange; |
| } |
| else |
| { |
| return kStatus_Success; |
| } |
| } |
| |
| /*! |
| * brief Unregisters the handle and the interrupt handler for the FlexIO-simulated peripheral. |
| * |
| * param base Pointer to the FlexIO simulated peripheral type. |
| * retval kStatus_Success Successfully create the handle. |
| * retval kStatus_OutOfRange The FlexIO type/handle/ISR table out of range. |
| */ |
| status_t FLEXIO_UnregisterHandleIRQ(void *base) |
| { |
| assert(base); |
| |
| uint8_t index = 0; |
| |
| /* Find the index from base address mappings. */ |
| for (index = 0; index < FLEXIO_HANDLE_COUNT; index++) |
| { |
| if (s_flexioType[index] == base) |
| { |
| /* Unregister FLEXIO simulated driver handle and isr. */ |
| s_flexioType[index] = NULL; |
| s_flexioHandle[index] = NULL; |
| s_flexioIsr[index] = NULL; |
| break; |
| } |
| } |
| |
| if (index == FLEXIO_HANDLE_COUNT) |
| { |
| return kStatus_OutOfRange; |
| } |
| else |
| { |
| return kStatus_Success; |
| } |
| } |
| |
| void FLEXIO_CommonIRQHandler(void) |
| { |
| uint8_t index; |
| |
| for (index = 0; index < FLEXIO_HANDLE_COUNT; index++) |
| { |
| if (s_flexioHandle[index]) |
| { |
| s_flexioIsr[index](s_flexioType[index], s_flexioHandle[index]); |
| } |
| } |
| /* Add for ARM errata 838869, affects Cortex-M4, Cortex-M4F Store immediate overlapping |
| exception return operation might vector to incorrect interrupt */ |
| #if defined __CORTEX_M && (__CORTEX_M == 4U) |
| __DSB(); |
| #endif |
| } |
| |
| void FLEXIO_DriverIRQHandler(void) |
| { |
| FLEXIO_CommonIRQHandler(); |
| } |
| |
| void FLEXIO0_DriverIRQHandler(void) |
| { |
| FLEXIO_CommonIRQHandler(); |
| } |
| |
| void FLEXIO1_DriverIRQHandler(void) |
| { |
| FLEXIO_CommonIRQHandler(); |
| } |
| |
| void UART2_FLEXIO_DriverIRQHandler(void) |
| { |
| FLEXIO_CommonIRQHandler(); |
| } |
| |
| void FLEXIO2_DriverIRQHandler(void) |
| { |
| FLEXIO_CommonIRQHandler(); |
| } |
| |
| void FLEXIO3_DriverIRQHandler(void) |
| { |
| FLEXIO_CommonIRQHandler(); |
| } |