| /* |
| * Copyright (c) 2015, Freescale Semiconductor, Inc. |
| * Copyright 2016-2017 NXP |
| * |
| * Redistribution and use in source and binary forms, with or without modification, |
| * are permitted provided that the following conditions are met: |
| * |
| * o Redistributions of source code must retain the above copyright notice, this list |
| * of conditions and the following disclaimer. |
| * |
| * o Redistributions in binary form must reproduce the above copyright notice, this |
| * list of conditions and the following disclaimer in the documentation and/or |
| * other materials provided with the distribution. |
| * |
| * o Neither the name of the copyright holder nor the names of its |
| * contributors may be used to endorse or promote products derived from this |
| * software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR |
| * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef _FSL_EDMA_H_ |
| #define _FSL_EDMA_H_ |
| |
| #include "fsl_common.h" |
| |
| /*! |
| * @addtogroup edma |
| * @{ |
| */ |
| |
| /******************************************************************************* |
| * Definitions |
| ******************************************************************************/ |
| |
| /*! @name Driver version */ |
| /*@{*/ |
| /*! @brief eDMA driver version */ |
| #define FSL_EDMA_DRIVER_VERSION (MAKE_VERSION(2, 1, 2)) /*!< Version 2.1.2. */ |
| /*@}*/ |
| |
| /*! @brief Compute the offset unit from DCHPRI3 */ |
| #define DMA_DCHPRI_INDEX(channel) (((channel) & ~0x03U) | (3 - ((channel)&0x03U))) |
| |
| /*! @brief Get the pointer of DCHPRIn */ |
| #define DMA_DCHPRIn(base, channel) ((volatile uint8_t *)&(base->DCHPRI3))[DMA_DCHPRI_INDEX(channel)] |
| |
| /*! @brief eDMA transfer configuration */ |
| typedef enum _edma_transfer_size |
| { |
| kEDMA_TransferSize1Bytes = 0x0U, /*!< Source/Destination data transfer size is 1 byte every time */ |
| kEDMA_TransferSize2Bytes = 0x1U, /*!< Source/Destination data transfer size is 2 bytes every time */ |
| kEDMA_TransferSize4Bytes = 0x2U, /*!< Source/Destination data transfer size is 4 bytes every time */ |
| kEDMA_TransferSize16Bytes = 0x4U, /*!< Source/Destination data transfer size is 16 bytes every time */ |
| kEDMA_TransferSize32Bytes = 0x5U, /*!< Source/Destination data transfer size is 32 bytes every time */ |
| } edma_transfer_size_t; |
| |
| /*! @brief eDMA modulo configuration */ |
| typedef enum _edma_modulo |
| { |
| kEDMA_ModuloDisable = 0x0U, /*!< Disable modulo */ |
| kEDMA_Modulo2bytes, /*!< Circular buffer size is 2 bytes. */ |
| kEDMA_Modulo4bytes, /*!< Circular buffer size is 4 bytes. */ |
| kEDMA_Modulo8bytes, /*!< Circular buffer size is 8 bytes. */ |
| kEDMA_Modulo16bytes, /*!< Circular buffer size is 16 bytes. */ |
| kEDMA_Modulo32bytes, /*!< Circular buffer size is 32 bytes. */ |
| kEDMA_Modulo64bytes, /*!< Circular buffer size is 64 bytes. */ |
| kEDMA_Modulo128bytes, /*!< Circular buffer size is 128 bytes. */ |
| kEDMA_Modulo256bytes, /*!< Circular buffer size is 256 bytes. */ |
| kEDMA_Modulo512bytes, /*!< Circular buffer size is 512 bytes. */ |
| kEDMA_Modulo1Kbytes, /*!< Circular buffer size is 1 K bytes. */ |
| kEDMA_Modulo2Kbytes, /*!< Circular buffer size is 2 K bytes. */ |
| kEDMA_Modulo4Kbytes, /*!< Circular buffer size is 4 K bytes. */ |
| kEDMA_Modulo8Kbytes, /*!< Circular buffer size is 8 K bytes. */ |
| kEDMA_Modulo16Kbytes, /*!< Circular buffer size is 16 K bytes. */ |
| kEDMA_Modulo32Kbytes, /*!< Circular buffer size is 32 K bytes. */ |
| kEDMA_Modulo64Kbytes, /*!< Circular buffer size is 64 K bytes. */ |
| kEDMA_Modulo128Kbytes, /*!< Circular buffer size is 128 K bytes. */ |
| kEDMA_Modulo256Kbytes, /*!< Circular buffer size is 256 K bytes. */ |
| kEDMA_Modulo512Kbytes, /*!< Circular buffer size is 512 K bytes. */ |
| kEDMA_Modulo1Mbytes, /*!< Circular buffer size is 1 M bytes. */ |
| kEDMA_Modulo2Mbytes, /*!< Circular buffer size is 2 M bytes. */ |
| kEDMA_Modulo4Mbytes, /*!< Circular buffer size is 4 M bytes. */ |
| kEDMA_Modulo8Mbytes, /*!< Circular buffer size is 8 M bytes. */ |
| kEDMA_Modulo16Mbytes, /*!< Circular buffer size is 16 M bytes. */ |
| kEDMA_Modulo32Mbytes, /*!< Circular buffer size is 32 M bytes. */ |
| kEDMA_Modulo64Mbytes, /*!< Circular buffer size is 64 M bytes. */ |
| kEDMA_Modulo128Mbytes, /*!< Circular buffer size is 128 M bytes. */ |
| kEDMA_Modulo256Mbytes, /*!< Circular buffer size is 256 M bytes. */ |
| kEDMA_Modulo512Mbytes, /*!< Circular buffer size is 512 M bytes. */ |
| kEDMA_Modulo1Gbytes, /*!< Circular buffer size is 1 G bytes. */ |
| kEDMA_Modulo2Gbytes, /*!< Circular buffer size is 2 G bytes. */ |
| } edma_modulo_t; |
| |
| /*! @brief Bandwidth control */ |
| typedef enum _edma_bandwidth |
| { |
| kEDMA_BandwidthStallNone = 0x0U, /*!< No eDMA engine stalls. */ |
| kEDMA_BandwidthStall4Cycle = 0x2U, /*!< eDMA engine stalls for 4 cycles after each read/write. */ |
| kEDMA_BandwidthStall8Cycle = 0x3U, /*!< eDMA engine stalls for 8 cycles after each read/write. */ |
| } edma_bandwidth_t; |
| |
| /*! @brief Channel link type */ |
| typedef enum _edma_channel_link_type |
| { |
| kEDMA_LinkNone = 0x0U, /*!< No channel link */ |
| kEDMA_MinorLink, /*!< Channel link after each minor loop */ |
| kEDMA_MajorLink, /*!< Channel link while major loop count exhausted */ |
| } edma_channel_link_type_t; |
| |
| /*!@brief eDMA channel status flags. */ |
| enum _edma_channel_status_flags |
| { |
| kEDMA_DoneFlag = 0x1U, /*!< DONE flag, set while transfer finished, CITER value exhausted*/ |
| kEDMA_ErrorFlag = 0x2U, /*!< eDMA error flag, an error occurred in a transfer */ |
| kEDMA_InterruptFlag = 0x4U, /*!< eDMA interrupt flag, set while an interrupt occurred of this channel */ |
| }; |
| |
| /*! @brief eDMA channel error status flags. */ |
| enum _edma_error_status_flags |
| { |
| kEDMA_DestinationBusErrorFlag = DMA_ES_DBE_MASK, /*!< Bus error on destination address */ |
| kEDMA_SourceBusErrorFlag = DMA_ES_SBE_MASK, /*!< Bus error on the source address */ |
| kEDMA_ScatterGatherErrorFlag = DMA_ES_SGE_MASK, /*!< Error on the Scatter/Gather address, not 32byte aligned. */ |
| kEDMA_NbytesErrorFlag = DMA_ES_NCE_MASK, /*!< NBYTES/CITER configuration error */ |
| kEDMA_DestinationOffsetErrorFlag = DMA_ES_DOE_MASK, /*!< Destination offset not aligned with destination size */ |
| kEDMA_DestinationAddressErrorFlag = DMA_ES_DAE_MASK, /*!< Destination address not aligned with destination size */ |
| kEDMA_SourceOffsetErrorFlag = DMA_ES_SOE_MASK, /*!< Source offset not aligned with source size */ |
| kEDMA_SourceAddressErrorFlag = DMA_ES_SAE_MASK, /*!< Source address not aligned with source size*/ |
| kEDMA_ErrorChannelFlag = DMA_ES_ERRCHN_MASK, /*!< Error channel number of the cancelled channel number */ |
| kEDMA_ChannelPriorityErrorFlag = DMA_ES_CPE_MASK, /*!< Channel priority is not unique. */ |
| kEDMA_TransferCanceledFlag = DMA_ES_ECX_MASK, /*!< Transfer cancelled */ |
| #if defined(FSL_FEATURE_EDMA_CHANNEL_GROUP_COUNT) && FSL_FEATURE_EDMA_CHANNEL_GROUP_COUNT > 1 |
| kEDMA_GroupPriorityErrorFlag = DMA_ES_GPE_MASK, /*!< Group priority is not unique. */ |
| #endif |
| kEDMA_ValidFlag = DMA_ES_VLD_MASK, /*!< No error occurred, this bit is 0. Otherwise, it is 1. */ |
| }; |
| |
| /*! @brief eDMA interrupt source */ |
| typedef enum _edma_interrupt_enable |
| { |
| kEDMA_ErrorInterruptEnable = 0x1U, /*!< Enable interrupt while channel error occurs. */ |
| kEDMA_MajorInterruptEnable = DMA_CSR_INTMAJOR_MASK, /*!< Enable interrupt while major count exhausted. */ |
| kEDMA_HalfInterruptEnable = DMA_CSR_INTHALF_MASK, /*!< Enable interrupt while major count to half value. */ |
| } edma_interrupt_enable_t; |
| |
| /*! @brief eDMA transfer type */ |
| typedef enum _edma_transfer_type |
| { |
| kEDMA_MemoryToMemory = 0x0U, /*!< Transfer from memory to memory */ |
| kEDMA_PeripheralToMemory, /*!< Transfer from peripheral to memory */ |
| kEDMA_MemoryToPeripheral, /*!< Transfer from memory to peripheral */ |
| } edma_transfer_type_t; |
| |
| /*! @brief eDMA transfer status */ |
| enum _edma_transfer_status |
| { |
| kStatus_EDMA_QueueFull = MAKE_STATUS(kStatusGroup_EDMA, 0), /*!< TCD queue is full. */ |
| kStatus_EDMA_Busy = MAKE_STATUS(kStatusGroup_EDMA, 1), /*!< Channel is busy and can't handle the |
| transfer request. */ |
| }; |
| |
| /*! @brief eDMA global configuration structure.*/ |
| typedef struct _edma_config |
| { |
| bool enableContinuousLinkMode; /*!< Enable (true) continuous link mode. Upon minor loop completion, the channel |
| activates again if that channel has a minor loop channel link enabled and |
| the link channel is itself. */ |
| bool enableHaltOnError; /*!< Enable (true) transfer halt on error. Any error causes the HALT bit to set. |
| Subsequently, all service requests are ignored until the HALT bit is cleared.*/ |
| bool enableRoundRobinArbitration; /*!< Enable (true) round robin channel arbitration method or fixed priority |
| arbitration is used for channel selection */ |
| bool enableDebugMode; /*!< Enable(true) eDMA debug mode. When in debug mode, the eDMA stalls the start of |
| a new channel. Executing channels are allowed to complete. */ |
| } edma_config_t; |
| |
| /*! |
| * @brief eDMA transfer configuration |
| * |
| * This structure configures the source/destination transfer attribute. |
| */ |
| typedef struct _edma_transfer_config |
| { |
| uint32_t srcAddr; /*!< Source data address. */ |
| uint32_t destAddr; /*!< Destination data address. */ |
| edma_transfer_size_t srcTransferSize; /*!< Source data transfer size. */ |
| edma_transfer_size_t destTransferSize; /*!< Destination data transfer size. */ |
| int16_t srcOffset; /*!< Sign-extended offset applied to the current source address to |
| form the next-state value as each source read is completed. */ |
| int16_t destOffset; /*!< Sign-extended offset applied to the current destination address to |
| form the next-state value as each destination write is completed. */ |
| uint32_t minorLoopBytes; /*!< Bytes to transfer in a minor loop*/ |
| uint32_t majorLoopCounts; /*!< Major loop iteration count. */ |
| } edma_transfer_config_t; |
| |
| /*! @brief eDMA channel priority configuration */ |
| typedef struct _edma_channel_Preemption_config |
| { |
| bool enableChannelPreemption; /*!< If true: a channel can be suspended by other channel with higher priority */ |
| bool enablePreemptAbility; /*!< If true: a channel can suspend other channel with low priority */ |
| uint8_t channelPriority; /*!< Channel priority */ |
| } edma_channel_Preemption_config_t; |
| |
| /*! @brief eDMA minor offset configuration */ |
| typedef struct _edma_minor_offset_config |
| { |
| bool enableSrcMinorOffset; /*!< Enable(true) or Disable(false) source minor loop offset. */ |
| bool enableDestMinorOffset; /*!< Enable(true) or Disable(false) destination minor loop offset. */ |
| uint32_t minorOffset; /*!< Offset for a minor loop mapping. */ |
| } edma_minor_offset_config_t; |
| |
| /*! |
| * @brief eDMA TCD. |
| * |
| * This structure is same as TCD register which is described in reference manual, |
| * and is used to configure the scatter/gather feature as a next hardware TCD. |
| */ |
| typedef struct _edma_tcd |
| { |
| __IO uint32_t SADDR; /*!< SADDR register, used to save source address */ |
| __IO uint16_t SOFF; /*!< SOFF register, save offset bytes every transfer */ |
| __IO uint16_t ATTR; /*!< ATTR register, source/destination transfer size and modulo */ |
| __IO uint32_t NBYTES; /*!< Nbytes register, minor loop length in bytes */ |
| __IO uint32_t SLAST; /*!< SLAST register */ |
| __IO uint32_t DADDR; /*!< DADDR register, used for destination address */ |
| __IO uint16_t DOFF; /*!< DOFF register, used for destination offset */ |
| __IO uint16_t CITER; /*!< CITER register, current minor loop numbers, for unfinished minor loop.*/ |
| __IO uint32_t DLAST_SGA; /*!< DLASTSGA register, next stcd address used in scatter-gather mode */ |
| __IO uint16_t CSR; /*!< CSR register, for TCD control status */ |
| __IO uint16_t BITER; /*!< BITER register, begin minor loop count. */ |
| } edma_tcd_t; |
| |
| /*! @brief Callback for eDMA */ |
| struct _edma_handle; |
| |
| /*! @brief Define callback function for eDMA. */ |
| typedef void (*edma_callback)(struct _edma_handle *handle, void *userData, bool transferDone, uint32_t tcds); |
| |
| /*! @brief eDMA transfer handle structure */ |
| typedef struct _edma_handle |
| { |
| edma_callback callback; /*!< Callback function for major count exhausted. */ |
| void *userData; /*!< Callback function parameter. */ |
| DMA_Type *base; /*!< eDMA peripheral base address. */ |
| edma_tcd_t *tcdPool; /*!< Pointer to memory stored TCDs. */ |
| uint8_t channel; /*!< eDMA channel number. */ |
| volatile int8_t header; /*!< The first TCD index. Should point to the next TCD to be loaded into the eDMA engine. */ |
| volatile int8_t tail; /*!< The last TCD index. Should point to the next TCD to be stored into the memory pool. */ |
| volatile int8_t tcdUsed; /*!< The number of used TCD slots. Should reflect the number of TCDs can be used/loaded in |
| the memory. */ |
| volatile int8_t tcdSize; /*!< The total number of TCD slots in the queue. */ |
| uint8_t flags; /*!< The status of the current channel. */ |
| } edma_handle_t; |
| |
| /******************************************************************************* |
| * APIs |
| ******************************************************************************/ |
| #if defined(__cplusplus) |
| extern "C" { |
| #endif /* __cplusplus */ |
| |
| /*! |
| * @name eDMA initialization and de-initialization |
| * @{ |
| */ |
| |
| /*! |
| * @brief Initializes the eDMA peripheral. |
| * |
| * This function ungates the eDMA clock and configures the eDMA peripheral according |
| * to the configuration structure. |
| * |
| * @param base eDMA peripheral base address. |
| * @param config A pointer to the configuration structure, see "edma_config_t". |
| * @note This function enables the minor loop map feature. |
| */ |
| void EDMA_Init(DMA_Type *base, const edma_config_t *config); |
| |
| /*! |
| * @brief Deinitializes the eDMA peripheral. |
| * |
| * This function gates the eDMA clock. |
| * |
| * @param base eDMA peripheral base address. |
| */ |
| void EDMA_Deinit(DMA_Type *base); |
| |
| /*! |
| * @brief Push content of TCD structure into hardware TCD register. |
| * |
| * @param base EDMA peripheral base address. |
| * @param channel EDMA channel number. |
| * @param tcd Point to TCD structure. |
| */ |
| void EDMA_InstallTCD(DMA_Type *base, uint32_t channel, edma_tcd_t *tcd); |
| |
| /*! |
| * @brief Gets the eDMA default configuration structure. |
| * |
| * This function sets the configuration structure to default values. |
| * The default configuration is set to the following values. |
| * @code |
| * config.enableContinuousLinkMode = false; |
| * config.enableHaltOnError = true; |
| * config.enableRoundRobinArbitration = false; |
| * config.enableDebugMode = false; |
| * @endcode |
| * |
| * @param config A pointer to the eDMA configuration structure. |
| */ |
| void EDMA_GetDefaultConfig(edma_config_t *config); |
| |
| /* @} */ |
| /*! |
| * @name eDMA Channel Operation |
| * @{ |
| */ |
| |
| /*! |
| * @brief Sets all TCD registers to default values. |
| * |
| * This function sets TCD registers for this channel to default values. |
| * |
| * @param base eDMA peripheral base address. |
| * @param channel eDMA channel number. |
| * @note This function must not be called while the channel transfer is ongoing |
| * or it causes unpredictable results. |
| * @note This function enables the auto stop request feature. |
| */ |
| void EDMA_ResetChannel(DMA_Type *base, uint32_t channel); |
| |
| /*! |
| * @brief Configures the eDMA transfer attribute. |
| * |
| * This function configures the transfer attribute, including source address, destination address, |
| * transfer size, address offset, and so on. It also configures the scatter gather feature if the |
| * user supplies the TCD address. |
| * Example: |
| * @code |
| * edma_transfer_t config; |
| * edma_tcd_t tcd; |
| * config.srcAddr = ..; |
| * config.destAddr = ..; |
| * ... |
| * EDMA_SetTransferConfig(DMA0, channel, &config, &stcd); |
| * @endcode |
| * |
| * @param base eDMA peripheral base address. |
| * @param channel eDMA channel number. |
| * @param config Pointer to eDMA transfer configuration structure. |
| * @param nextTcd Point to TCD structure. It can be NULL if users |
| * do not want to enable scatter/gather feature. |
| * @note If nextTcd is not NULL, it means scatter gather feature is enabled |
| * and DREQ bit is cleared in the previous transfer configuration, which |
| * is set in the eDMA_ResetChannel. |
| */ |
| void EDMA_SetTransferConfig(DMA_Type *base, |
| uint32_t channel, |
| const edma_transfer_config_t *config, |
| edma_tcd_t *nextTcd); |
| |
| /*! |
| * @brief Configures the eDMA minor offset feature. |
| * |
| * The minor offset means that the signed-extended value is added to the source address or destination |
| * address after each minor loop. |
| * |
| * @param base eDMA peripheral base address. |
| * @param channel eDMA channel number. |
| * @param config A pointer to the minor offset configuration structure. |
| */ |
| void EDMA_SetMinorOffsetConfig(DMA_Type *base, uint32_t channel, const edma_minor_offset_config_t *config); |
| |
| /*! |
| * @brief Configures the eDMA channel preemption feature. |
| * |
| * This function configures the channel preemption attribute and the priority of the channel. |
| * |
| * @param base eDMA peripheral base address. |
| * @param channel eDMA channel number |
| * @param config A pointer to the channel preemption configuration structure. |
| */ |
| static inline void EDMA_SetChannelPreemptionConfig(DMA_Type *base, |
| uint32_t channel, |
| const edma_channel_Preemption_config_t *config) |
| { |
| assert(channel < FSL_FEATURE_EDMA_MODULE_CHANNEL); |
| assert(config != NULL); |
| |
| DMA_DCHPRIn(base, channel) = |
| (DMA_DCHPRI0_DPA(!config->enablePreemptAbility) | DMA_DCHPRI0_ECP(config->enableChannelPreemption) | |
| DMA_DCHPRI0_CHPRI(config->channelPriority)); |
| } |
| |
| /*! |
| * @brief Sets the channel link for the eDMA transfer. |
| * |
| * This function configures either the minor link or the major link mode. The minor link means that the channel link is |
| * triggered every time CITER decreases by 1. The major link means that the channel link is triggered when the CITER is |
| * exhausted. |
| * |
| * @param base eDMA peripheral base address. |
| * @param channel eDMA channel number. |
| * @param type A channel link type, which can be one of the following: |
| * @arg kEDMA_LinkNone |
| * @arg kEDMA_MinorLink |
| * @arg kEDMA_MajorLink |
| * @param linkedChannel The linked channel number. |
| * @note Users should ensure that DONE flag is cleared before calling this interface, or the configuration is invalid. |
| */ |
| void EDMA_SetChannelLink(DMA_Type *base, uint32_t channel, edma_channel_link_type_t type, uint32_t linkedChannel); |
| |
| /*! |
| * @brief Sets the bandwidth for the eDMA transfer. |
| * |
| * Because the eDMA processes the minor loop, it continuously generates read/write sequences |
| * until the minor count is exhausted. The bandwidth forces the eDMA to stall after the completion of |
| * each read/write access to control the bus request bandwidth seen by the crossbar switch. |
| * |
| * @param base eDMA peripheral base address. |
| * @param channel eDMA channel number. |
| * @param bandWidth A bandwidth setting, which can be one of the following: |
| * @arg kEDMABandwidthStallNone |
| * @arg kEDMABandwidthStall4Cycle |
| * @arg kEDMABandwidthStall8Cycle |
| */ |
| void EDMA_SetBandWidth(DMA_Type *base, uint32_t channel, edma_bandwidth_t bandWidth); |
| |
| /*! |
| * @brief Sets the source modulo and the destination modulo for the eDMA transfer. |
| * |
| * This function defines a specific address range specified to be the value after (SADDR + SOFF)/(DADDR + DOFF) |
| * calculation is performed or the original register value. It provides the ability to implement a circular data |
| * queue easily. |
| * |
| * @param base eDMA peripheral base address. |
| * @param channel eDMA channel number. |
| * @param srcModulo A source modulo value. |
| * @param destModulo A destination modulo value. |
| */ |
| void EDMA_SetModulo(DMA_Type *base, uint32_t channel, edma_modulo_t srcModulo, edma_modulo_t destModulo); |
| |
| #if defined(FSL_FEATURE_EDMA_ASYNCHRO_REQUEST_CHANNEL_COUNT) && FSL_FEATURE_EDMA_ASYNCHRO_REQUEST_CHANNEL_COUNT |
| /*! |
| * @brief Enables an async request for the eDMA transfer. |
| * |
| * @param base eDMA peripheral base address. |
| * @param channel eDMA channel number. |
| * @param enable The command to enable (true) or disable (false). |
| */ |
| static inline void EDMA_EnableAsyncRequest(DMA_Type *base, uint32_t channel, bool enable) |
| { |
| assert(channel < FSL_FEATURE_DMAMUX_MODULE_CHANNEL); |
| |
| base->EARS = (base->EARS & (~(1U << channel))) | ((uint32_t)enable << channel); |
| } |
| #endif /* FSL_FEATURE_EDMA_ASYNCHRO_REQUEST_CHANNEL_COUNT */ |
| |
| /*! |
| * @brief Enables an auto stop request for the eDMA transfer. |
| * |
| * If enabling the auto stop request, the eDMA hardware automatically disables the hardware channel request. |
| * |
| * @param base eDMA peripheral base address. |
| * @param channel eDMA channel number. |
| * @param enable The command to enable (true) or disable (false). |
| */ |
| static inline void EDMA_EnableAutoStopRequest(DMA_Type *base, uint32_t channel, bool enable) |
| { |
| assert(channel < FSL_FEATURE_DMAMUX_MODULE_CHANNEL); |
| |
| base->TCD[channel].CSR = (base->TCD[channel].CSR & (~DMA_CSR_DREQ_MASK)) | DMA_CSR_DREQ(enable); |
| } |
| |
| /*! |
| * @brief Enables the interrupt source for the eDMA transfer. |
| * |
| * @param base eDMA peripheral base address. |
| * @param channel eDMA channel number. |
| * @param mask The mask of interrupt source to be set. Users need to use |
| * the defined edma_interrupt_enable_t type. |
| */ |
| void EDMA_EnableChannelInterrupts(DMA_Type *base, uint32_t channel, uint32_t mask); |
| |
| /*! |
| * @brief Disables the interrupt source for the eDMA transfer. |
| * |
| * @param base eDMA peripheral base address. |
| * @param channel eDMA channel number. |
| * @param mask The mask of the interrupt source to be set. Use |
| * the defined edma_interrupt_enable_t type. |
| */ |
| void EDMA_DisableChannelInterrupts(DMA_Type *base, uint32_t channel, uint32_t mask); |
| |
| /* @} */ |
| /*! |
| * @name eDMA TCD Operation |
| * @{ |
| */ |
| |
| /*! |
| * @brief Sets all fields to default values for the TCD structure. |
| * |
| * This function sets all fields for this TCD structure to default value. |
| * |
| * @param tcd Pointer to the TCD structure. |
| * @note This function enables the auto stop request feature. |
| */ |
| void EDMA_TcdReset(edma_tcd_t *tcd); |
| |
| /*! |
| * @brief Configures the eDMA TCD transfer attribute. |
| * |
| * The TCD is a transfer control descriptor. The content of the TCD is the same as the hardware TCD registers. |
| * The STCD is used in the scatter-gather mode. |
| * This function configures the TCD transfer attribute, including source address, destination address, |
| * transfer size, address offset, and so on. It also configures the scatter gather feature if the |
| * user supplies the next TCD address. |
| * Example: |
| * @code |
| * edma_transfer_t config = { |
| * ... |
| * } |
| * edma_tcd_t tcd __aligned(32); |
| * edma_tcd_t nextTcd __aligned(32); |
| * EDMA_TcdSetTransferConfig(&tcd, &config, &nextTcd); |
| * @endcode |
| * |
| * @param tcd Pointer to the TCD structure. |
| * @param config Pointer to eDMA transfer configuration structure. |
| * @param nextTcd Pointer to the next TCD structure. It can be NULL if users |
| * do not want to enable scatter/gather feature. |
| * @note TCD address should be 32 bytes aligned or it causes an eDMA error. |
| * @note If the nextTcd is not NULL, the scatter gather feature is enabled |
| * and DREQ bit is cleared in the previous transfer configuration, which |
| * is set in the EDMA_TcdReset. |
| */ |
| void EDMA_TcdSetTransferConfig(edma_tcd_t *tcd, const edma_transfer_config_t *config, edma_tcd_t *nextTcd); |
| |
| /*! |
| * @brief Configures the eDMA TCD minor offset feature. |
| * |
| * A minor offset is a signed-extended value added to the source address or a destination |
| * address after each minor loop. |
| * |
| * @param tcd A point to the TCD structure. |
| * @param config A pointer to the minor offset configuration structure. |
| */ |
| void EDMA_TcdSetMinorOffsetConfig(edma_tcd_t *tcd, const edma_minor_offset_config_t *config); |
| |
| /*! |
| * @brief Sets the channel link for the eDMA TCD. |
| * |
| * This function configures either a minor link or a major link. The minor link means the channel link is |
| * triggered every time CITER decreases by 1. The major link means that the channel link is triggered when the CITER is |
| * exhausted. |
| * |
| * @note Users should ensure that DONE flag is cleared before calling this interface, or the configuration is invalid. |
| * @param tcd Point to the TCD structure. |
| * @param type Channel link type, it can be one of: |
| * @arg kEDMA_LinkNone |
| * @arg kEDMA_MinorLink |
| * @arg kEDMA_MajorLink |
| * @param linkedChannel The linked channel number. |
| */ |
| void EDMA_TcdSetChannelLink(edma_tcd_t *tcd, edma_channel_link_type_t type, uint32_t linkedChannel); |
| |
| /*! |
| * @brief Sets the bandwidth for the eDMA TCD. |
| * |
| * Because the eDMA processes the minor loop, it continuously generates read/write sequences |
| * until the minor count is exhausted. The bandwidth forces the eDMA to stall after the completion of |
| * each read/write access to control the bus request bandwidth seen by the crossbar switch. |
| * @param tcd A pointer to the TCD structure. |
| * @param bandWidth A bandwidth setting, which can be one of the following: |
| * @arg kEDMABandwidthStallNone |
| * @arg kEDMABandwidthStall4Cycle |
| * @arg kEDMABandwidthStall8Cycle |
| */ |
| static inline void EDMA_TcdSetBandWidth(edma_tcd_t *tcd, edma_bandwidth_t bandWidth) |
| { |
| assert(tcd != NULL); |
| assert(((uint32_t)tcd & 0x1FU) == 0); |
| |
| tcd->CSR = (tcd->CSR & (~DMA_CSR_BWC_MASK)) | DMA_CSR_BWC(bandWidth); |
| } |
| |
| /*! |
| * @brief Sets the source modulo and the destination modulo for the eDMA TCD. |
| * |
| * This function defines a specific address range specified to be the value after (SADDR + SOFF)/(DADDR + DOFF) |
| * calculation is performed or the original register value. It provides the ability to implement a circular data |
| * queue easily. |
| * |
| * @param tcd A pointer to the TCD structure. |
| * @param srcModulo A source modulo value. |
| * @param destModulo A destination modulo value. |
| */ |
| void EDMA_TcdSetModulo(edma_tcd_t *tcd, edma_modulo_t srcModulo, edma_modulo_t destModulo); |
| |
| /*! |
| * @brief Sets the auto stop request for the eDMA TCD. |
| * |
| * If enabling the auto stop request, the eDMA hardware automatically disables the hardware channel request. |
| * |
| * @param tcd A pointer to the TCD structure. |
| * @param enable The command to enable (true) or disable (false). |
| */ |
| static inline void EDMA_TcdEnableAutoStopRequest(edma_tcd_t *tcd, bool enable) |
| { |
| assert(tcd != NULL); |
| assert(((uint32_t)tcd & 0x1FU) == 0); |
| |
| tcd->CSR = (tcd->CSR & (~DMA_CSR_DREQ_MASK)) | DMA_CSR_DREQ(enable); |
| } |
| |
| /*! |
| * @brief Enables the interrupt source for the eDMA TCD. |
| * |
| * @param tcd Point to the TCD structure. |
| * @param mask The mask of interrupt source to be set. Users need to use |
| * the defined edma_interrupt_enable_t type. |
| */ |
| void EDMA_TcdEnableInterrupts(edma_tcd_t *tcd, uint32_t mask); |
| |
| /*! |
| * @brief Disables the interrupt source for the eDMA TCD. |
| * |
| * @param tcd Point to the TCD structure. |
| * @param mask The mask of interrupt source to be set. Users need to use |
| * the defined edma_interrupt_enable_t type. |
| */ |
| void EDMA_TcdDisableInterrupts(edma_tcd_t *tcd, uint32_t mask); |
| |
| /*! @} */ |
| /*! |
| * @name eDMA Channel Transfer Operation |
| * @{ |
| */ |
| |
| /*! |
| * @brief Enables the eDMA hardware channel request. |
| * |
| * This function enables the hardware channel request. |
| * |
| * @param base eDMA peripheral base address. |
| * @param channel eDMA channel number. |
| */ |
| static inline void EDMA_EnableChannelRequest(DMA_Type *base, uint32_t channel) |
| { |
| assert(channel < FSL_FEATURE_DMAMUX_MODULE_CHANNEL); |
| |
| base->SERQ = DMA_SERQ_SERQ(channel); |
| } |
| |
| /*! |
| * @brief Disables the eDMA hardware channel request. |
| * |
| * This function disables the hardware channel request. |
| * |
| * @param base eDMA peripheral base address. |
| * @param channel eDMA channel number. |
| */ |
| static inline void EDMA_DisableChannelRequest(DMA_Type *base, uint32_t channel) |
| { |
| assert(channel < FSL_FEATURE_DMAMUX_MODULE_CHANNEL); |
| |
| base->CERQ = DMA_CERQ_CERQ(channel); |
| } |
| |
| /*! |
| * @brief Starts the eDMA transfer by using the software trigger. |
| * |
| * This function starts a minor loop transfer. |
| * |
| * @param base eDMA peripheral base address. |
| * @param channel eDMA channel number. |
| */ |
| static inline void EDMA_TriggerChannelStart(DMA_Type *base, uint32_t channel) |
| { |
| assert(channel < FSL_FEATURE_DMAMUX_MODULE_CHANNEL); |
| |
| base->SSRT = DMA_SSRT_SSRT(channel); |
| } |
| |
| /*! @} */ |
| /*! |
| * @name eDMA Channel Status Operation |
| * @{ |
| */ |
| |
| /*! |
| * @brief Gets the remaining major loop count from the eDMA current channel TCD. |
| * |
| * This function checks the TCD (Task Control Descriptor) status for a specified |
| * eDMA channel and returns the the number of major loop count that has not finished. |
| * |
| * @param base eDMA peripheral base address. |
| * @param channel eDMA channel number. |
| * @return Major loop count which has not been transferred yet for the current TCD. |
| * @note 1. This function can only be used to get unfinished major loop count of transfer without |
| * the next TCD, or it might be inaccuracy. |
| * 2. The unfinished/remaining transfer bytes cannot be obtained directly from registers while |
| * the channel is running. |
| * Because to calculate the remaining bytes, the initial NBYTES configured in DMA_TCDn_NBYTES_MLNO |
| * register is needed while the eDMA IP does not support getting it while a channel is active. |
| * In another word, the NBYTES value reading is always the actual (decrementing) NBYTES value the dma_engine |
| * is working with while a channel is running. |
| * Consequently, to get the remaining transfer bytes, a software-saved initial value of NBYTES (for example |
| * copied before enabling the channel) is needed. The formula to calculate it is shown below: |
| * RemainingBytes = RemainingMajorLoopCount * NBYTES(initially configured) |
| */ |
| uint32_t EDMA_GetRemainingMajorLoopCount(DMA_Type *base, uint32_t channel); |
| |
| /*! |
| * @brief Gets the eDMA channel error status flags. |
| * |
| * @param base eDMA peripheral base address. |
| * @return The mask of error status flags. Users need to use the |
| * _edma_error_status_flags type to decode the return variables. |
| */ |
| static inline uint32_t EDMA_GetErrorStatusFlags(DMA_Type *base) |
| { |
| return base->ES; |
| } |
| |
| /*! |
| * @brief Gets the eDMA channel status flags. |
| * |
| * @param base eDMA peripheral base address. |
| * @param channel eDMA channel number. |
| * @return The mask of channel status flags. Users need to use the |
| * _edma_channel_status_flags type to decode the return variables. |
| */ |
| uint32_t EDMA_GetChannelStatusFlags(DMA_Type *base, uint32_t channel); |
| |
| /*! |
| * @brief Clears the eDMA channel status flags. |
| * |
| * @param base eDMA peripheral base address. |
| * @param channel eDMA channel number. |
| * @param mask The mask of channel status to be cleared. Users need to use |
| * the defined _edma_channel_status_flags type. |
| */ |
| void EDMA_ClearChannelStatusFlags(DMA_Type *base, uint32_t channel, uint32_t mask); |
| |
| /*! @} */ |
| /*! |
| * @name eDMA Transactional Operation |
| */ |
| |
| /*! |
| * @brief Creates the eDMA handle. |
| * |
| * This function is called if using the transactional API for eDMA. This function |
| * initializes the internal state of the eDMA handle. |
| * |
| * @param handle eDMA handle pointer. The eDMA handle stores callback function and |
| * parameters. |
| * @param base eDMA peripheral base address. |
| * @param channel eDMA channel number. |
| */ |
| void EDMA_CreateHandle(edma_handle_t *handle, DMA_Type *base, uint32_t channel); |
| |
| /*! |
| * @brief Installs the TCDs memory pool into the eDMA handle. |
| * |
| * This function is called after the EDMA_CreateHandle to use scatter/gather feature. |
| * |
| * @param handle eDMA handle pointer. |
| * @param tcdPool A memory pool to store TCDs. It must be 32 bytes aligned. |
| * @param tcdSize The number of TCD slots. |
| */ |
| void EDMA_InstallTCDMemory(edma_handle_t *handle, edma_tcd_t *tcdPool, uint32_t tcdSize); |
| |
| /*! |
| * @brief Installs a callback function for the eDMA transfer. |
| * |
| * This callback is called in the eDMA IRQ handler. Use the callback to do something after |
| * the current major loop transfer completes. |
| * |
| * @param handle eDMA handle pointer. |
| * @param callback eDMA callback function pointer. |
| * @param userData A parameter for the callback function. |
| */ |
| void EDMA_SetCallback(edma_handle_t *handle, edma_callback callback, void *userData); |
| |
| /*! |
| * @brief Prepares the eDMA transfer structure. |
| * |
| * This function prepares the transfer configuration structure according to the user input. |
| * |
| * @param config The user configuration structure of type edma_transfer_t. |
| * @param srcAddr eDMA transfer source address. |
| * @param srcWidth eDMA transfer source address width(bytes). |
| * @param destAddr eDMA transfer destination address. |
| * @param destWidth eDMA transfer destination address width(bytes). |
| * @param bytesEachRequest eDMA transfer bytes per channel request. |
| * @param transferBytes eDMA transfer bytes to be transferred. |
| * @param type eDMA transfer type. |
| * @note The data address and the data width must be consistent. For example, if the SRC |
| * is 4 bytes, the source address must be 4 bytes aligned, or it results in |
| * source address error (SAE). |
| */ |
| void EDMA_PrepareTransfer(edma_transfer_config_t *config, |
| void *srcAddr, |
| uint32_t srcWidth, |
| void *destAddr, |
| uint32_t destWidth, |
| uint32_t bytesEachRequest, |
| uint32_t transferBytes, |
| edma_transfer_type_t type); |
| |
| /*! |
| * @brief Submits the eDMA transfer request. |
| * |
| * This function submits the eDMA transfer request according to the transfer configuration structure. |
| * If submitting the transfer request repeatedly, this function packs an unprocessed request as |
| * a TCD and enables scatter/gather feature to process it in the next time. |
| * |
| * @param handle eDMA handle pointer. |
| * @param config Pointer to eDMA transfer configuration structure. |
| * @retval kStatus_EDMA_Success It means submit transfer request succeed. |
| * @retval kStatus_EDMA_QueueFull It means TCD queue is full. Submit transfer request is not allowed. |
| * @retval kStatus_EDMA_Busy It means the given channel is busy, need to submit request later. |
| */ |
| status_t EDMA_SubmitTransfer(edma_handle_t *handle, const edma_transfer_config_t *config); |
| |
| /*! |
| * @brief eDMA starts transfer. |
| * |
| * This function enables the channel request. Users can call this function after submitting the transfer request |
| * or before submitting the transfer request. |
| * |
| * @param handle eDMA handle pointer. |
| */ |
| void EDMA_StartTransfer(edma_handle_t *handle); |
| |
| /*! |
| * @brief eDMA stops transfer. |
| * |
| * This function disables the channel request to pause the transfer. Users can call EDMA_StartTransfer() |
| * again to resume the transfer. |
| * |
| * @param handle eDMA handle pointer. |
| */ |
| void EDMA_StopTransfer(edma_handle_t *handle); |
| |
| /*! |
| * @brief eDMA aborts transfer. |
| * |
| * This function disables the channel request and clear transfer status bits. |
| * Users can submit another transfer after calling this API. |
| * |
| * @param handle DMA handle pointer. |
| */ |
| void EDMA_AbortTransfer(edma_handle_t *handle); |
| |
| /*! |
| * @brief Get unused TCD slot number. |
| * |
| * This function gets current tcd index which is run. If the TCD pool pointer is NULL, it will return 0. |
| * |
| * @param handle DMA handle pointer. |
| * @return The unused tcd slot number. |
| */ |
| static inline uint32_t EDMA_GetUnusedTCDNumber(edma_handle_t *handle) |
| { |
| return (handle->tcdSize - handle->tcdUsed); |
| } |
| |
| /*! |
| * @brief Get the next tcd address. |
| * |
| * This function gets the next tcd address. If this is last TCD, return 0. |
| * |
| * @param handle DMA handle pointer. |
| * @return The next TCD address. |
| */ |
| static inline uint32_t EDMA_GetNextTCDAddress(edma_handle_t *handle) |
| { |
| return (handle->base->TCD[handle->channel].DLAST_SGA); |
| } |
| |
| /*! |
| * @brief eDMA IRQ handler for the current major loop transfer completion. |
| * |
| * This function clears the channel major interrupt flag and calls |
| * the callback function if it is not NULL. |
| * |
| * Note: |
| * For the case using TCD queue, when the major iteration count is exhausted, additional operations are performed. |
| * These include the final address adjustments and reloading of the BITER field into the CITER. |
| * Assertion of an optional interrupt request also occurs at this time, as does a possible fetch of a new TCD from |
| * memory using the scatter/gather address pointer included in the descriptor (if scatter/gather is enabled). |
| * |
| * For instance, when the time interrupt of TCD[0] happens, the TCD[1] has already been loaded into the eDMA engine. |
| * As sga and sga_index are calculated based on the DLAST_SGA bitfield lies in the TCD_CSR register, the sga_index |
| * in this case should be 2 (DLAST_SGA of TCD[1] stores the address of TCD[2]). Thus, the "tcdUsed" updated should be |
| * (tcdUsed - 2U) which indicates the number of TCDs can be loaded in the memory pool (because TCD[0] and TCD[1] have |
| * been loaded into the eDMA engine at this point already.). |
| * |
| * For the last two continuous ISRs in a scatter/gather process, they both load the last TCD (The last ISR does not |
| * load a new TCD) from the memory pool to the eDMA engine when major loop completes. |
| * Therefore, ensure that the header and tcdUsed updated are identical for them. |
| * tcdUsed are both 0 in this case as no TCD to be loaded. |
| * |
| * See the "eDMA basic data flow" in the eDMA Functional description section of the Reference Manual for |
| * further details. |
| * |
| * @param handle eDMA handle pointer. |
| */ |
| void EDMA_HandleIRQ(edma_handle_t *handle); |
| |
| /* @} */ |
| |
| #if defined(__cplusplus) |
| } |
| #endif /* __cplusplus */ |
| |
| /* @} */ |
| |
| #endif /*_FSL_EDMA_H_*/ |