/* * Copyright (c) 2013-2017 ARM Limited. All rights reserved. * * SPDX-License-Identifier: Apache-2.0 * * Licensed under the Apache License, Version 2.0 (the License); you may * not use this file except in compliance with the License. * You may obtain a copy of the License at * * www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an AS IS BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * * $Date: 2. Feb 2017 * $Revision: V2.2 * * Project: SPI (Serial Peripheral Interface) Driver definitions */ /* History: * Version 2.2 * ARM_SPI_STATUS made volatile * Version 2.1 * Renamed status flag "tx_rx_busy" to "busy" * Version 2.0 * New simplified driver: * complexity moved to upper layer (especially data handling) * more unified API for different communication interfaces * Added: * Slave Mode * Half-duplex Modes * Configurable number of data bits * Support for TI Mode and Microwire * Changed prefix ARM_DRV -> ARM_DRIVER * Version 1.10 * Namespace prefix ARM_ added * Version 1.01 * Added "send_done_event" to Capabilities * Version 1.00 * Initial release */ #ifndef DRIVER_SPI_H_ #define DRIVER_SPI_H_ #ifdef __cplusplus extern "C" { #endif #include "Driver_Common.h" #define ARM_SPI_API_VERSION ARM_DRIVER_VERSION_MAJOR_MINOR(2,2) /* API version */ /****** SPI Control Codes *****/ #define ARM_SPI_CONTROL_Pos 0 #define ARM_SPI_CONTROL_Msk (0xFFUL << ARM_SPI_CONTROL_Pos) /*----- SPI Control Codes: Mode -----*/ #define ARM_SPI_MODE_INACTIVE (0x00UL << ARM_SPI_CONTROL_Pos) ///< SPI Inactive #define ARM_SPI_MODE_MASTER (0x01UL << ARM_SPI_CONTROL_Pos) ///< SPI Master (Output on MOSI, Input on MISO); arg = Bus Speed in bps #define ARM_SPI_MODE_SLAVE (0x02UL << ARM_SPI_CONTROL_Pos) ///< SPI Slave (Output on MISO, Input on MOSI) #define ARM_SPI_MODE_MASTER_SIMPLEX (0x03UL << ARM_SPI_CONTROL_Pos) ///< SPI Master (Output/Input on MOSI); arg = Bus Speed in bps #define ARM_SPI_MODE_SLAVE_SIMPLEX (0x04UL << ARM_SPI_CONTROL_Pos) ///< SPI Slave (Output/Input on MISO) /*----- SPI Control Codes: Mode Parameters: Frame Format -----*/ #define ARM_SPI_FRAME_FORMAT_Pos 8 #define ARM_SPI_FRAME_FORMAT_Msk (7UL << ARM_SPI_FRAME_FORMAT_Pos) #define ARM_SPI_CPOL0_CPHA0 (0UL << ARM_SPI_FRAME_FORMAT_Pos) ///< Clock Polarity 0, Clock Phase 0 (default) #define ARM_SPI_CPOL0_CPHA1 (1UL << ARM_SPI_FRAME_FORMAT_Pos) ///< Clock Polarity 0, Clock Phase 1 #define ARM_SPI_CPOL1_CPHA0 (2UL << ARM_SPI_FRAME_FORMAT_Pos) ///< Clock Polarity 1, Clock Phase 0 #define ARM_SPI_CPOL1_CPHA1 (3UL << ARM_SPI_FRAME_FORMAT_Pos) ///< Clock Polarity 1, Clock Phase 1 #define ARM_SPI_TI_SSI (4UL << ARM_SPI_FRAME_FORMAT_Pos) ///< Texas Instruments Frame Format #define ARM_SPI_MICROWIRE (5UL << ARM_SPI_FRAME_FORMAT_Pos) ///< National Microwire Frame Format /*----- SPI Control Codes: Mode Parameters: Data Bits -----*/ #define ARM_SPI_DATA_BITS_Pos 12 #define ARM_SPI_DATA_BITS_Msk (0x3FUL << ARM_SPI_DATA_BITS_Pos) #define ARM_SPI_DATA_BITS(n) (((n) & 0x3F) << ARM_SPI_DATA_BITS_Pos) ///< Number of Data bits /*----- SPI Control Codes: Mode Parameters: Bit Order -----*/ #define ARM_SPI_BIT_ORDER_Pos 18 #define ARM_SPI_BIT_ORDER_Msk (1UL << ARM_SPI_BIT_ORDER_Pos) #define ARM_SPI_MSB_LSB (0UL << ARM_SPI_BIT_ORDER_Pos) ///< SPI Bit order from MSB to LSB (default) #define ARM_SPI_LSB_MSB (1UL << ARM_SPI_BIT_ORDER_Pos) ///< SPI Bit order from LSB to MSB /*----- SPI Control Codes: Mode Parameters: Slave Select Mode -----*/ #define ARM_SPI_SS_MASTER_MODE_Pos 19 #define ARM_SPI_SS_MASTER_MODE_Msk (3UL << ARM_SPI_SS_MASTER_MODE_Pos) #define ARM_SPI_SS_MASTER_UNUSED (0UL << ARM_SPI_SS_MASTER_MODE_Pos) ///< SPI Slave Select when Master: Not used (default) #define ARM_SPI_SS_MASTER_SW (1UL << ARM_SPI_SS_MASTER_MODE_Pos) ///< SPI Slave Select when Master: Software controlled #define ARM_SPI_SS_MASTER_HW_OUTPUT (2UL << ARM_SPI_SS_MASTER_MODE_Pos) ///< SPI Slave Select when Master: Hardware controlled Output #define ARM_SPI_SS_MASTER_HW_INPUT (3UL << ARM_SPI_SS_MASTER_MODE_Pos) ///< SPI Slave Select when Master: Hardware monitored Input #define ARM_SPI_SS_SLAVE_MODE_Pos 21 #define ARM_SPI_SS_SLAVE_MODE_Msk (1UL << ARM_SPI_SS_SLAVE_MODE_Pos) #define ARM_SPI_SS_SLAVE_HW (0UL << ARM_SPI_SS_SLAVE_MODE_Pos) ///< SPI Slave Select when Slave: Hardware monitored (default) #define ARM_SPI_SS_SLAVE_SW (1UL << ARM_SPI_SS_SLAVE_MODE_Pos) ///< SPI Slave Select when Slave: Software controlled /*----- SPI Control Codes: Miscellaneous Controls -----*/ #define ARM_SPI_SET_BUS_SPEED (0x10UL << ARM_SPI_CONTROL_Pos) ///< Set Bus Speed in bps; arg = value #define ARM_SPI_GET_BUS_SPEED (0x11UL << ARM_SPI_CONTROL_Pos) ///< Get Bus Speed in bps #define ARM_SPI_SET_DEFAULT_TX_VALUE (0x12UL << ARM_SPI_CONTROL_Pos) ///< Set default Transmit value; arg = value #define ARM_SPI_CONTROL_SS (0x13UL << ARM_SPI_CONTROL_Pos) ///< Control Slave Select; arg: 0=inactive, 1=active #define ARM_SPI_ABORT_TRANSFER (0x14UL << ARM_SPI_CONTROL_Pos) ///< Abort current data transfer /****** SPI Slave Select Signal definitions *****/ #define ARM_SPI_SS_INACTIVE 0 ///< SPI Slave Select Signal Inactive #define ARM_SPI_SS_ACTIVE 1 ///< SPI Slave Select Signal Active /****** SPI specific error codes *****/ #define ARM_SPI_ERROR_MODE (ARM_DRIVER_ERROR_SPECIFIC - 1) ///< Specified Mode not supported #define ARM_SPI_ERROR_FRAME_FORMAT (ARM_DRIVER_ERROR_SPECIFIC - 2) ///< Specified Frame Format not supported #define ARM_SPI_ERROR_DATA_BITS (ARM_DRIVER_ERROR_SPECIFIC - 3) ///< Specified number of Data bits not supported #define ARM_SPI_ERROR_BIT_ORDER (ARM_DRIVER_ERROR_SPECIFIC - 4) ///< Specified Bit order not supported #define ARM_SPI_ERROR_SS_MODE (ARM_DRIVER_ERROR_SPECIFIC - 5) ///< Specified Slave Select Mode not supported /** \brief SPI Status */ typedef volatile struct _ARM_SPI_STATUS { uint32_t busy : 1; ///< Transmitter/Receiver busy flag uint32_t data_lost : 1; ///< Data lost: Receive overflow / Transmit underflow (cleared on start of transfer operation) uint32_t mode_fault : 1; ///< Mode fault detected; optional (cleared on start of transfer operation) uint32_t reserved : 29; } ARM_SPI_STATUS; /****** SPI Event *****/ #define ARM_SPI_EVENT_TRANSFER_COMPLETE (1UL << 0) ///< Data Transfer completed #define ARM_SPI_EVENT_DATA_LOST (1UL << 1) ///< Data lost: Receive overflow / Transmit underflow #define ARM_SPI_EVENT_MODE_FAULT (1UL << 2) ///< Master Mode Fault (SS deactivated when Master) // Function documentation /** \fn ARM_DRIVER_VERSION ARM_SPI_GetVersion (void) \brief Get driver version. \return \ref ARM_DRIVER_VERSION \fn ARM_SPI_CAPABILITIES ARM_SPI_GetCapabilities (void) \brief Get driver capabilities. \return \ref ARM_SPI_CAPABILITIES \fn int32_t ARM_SPI_Initialize (ARM_SPI_SignalEvent_t cb_event) \brief Initialize SPI Interface. \param[in] cb_event Pointer to \ref ARM_SPI_SignalEvent \return \ref execution_status \fn int32_t ARM_SPI_Uninitialize (void) \brief De-initialize SPI Interface. \return \ref execution_status \fn int32_t ARM_SPI_PowerControl (ARM_POWER_STATE state) \brief Control SPI Interface Power. \param[in] state Power state \return \ref execution_status \fn int32_t ARM_SPI_Send (const void *data, uint32_t num) \brief Start sending data to SPI transmitter. \param[in] data Pointer to buffer with data to send to SPI transmitter \param[in] num Number of data items to send \return \ref execution_status \fn int32_t ARM_SPI_Receive (void *data, uint32_t num) \brief Start receiving data from SPI receiver. \param[out] data Pointer to buffer for data to receive from SPI receiver \param[in] num Number of data items to receive \return \ref execution_status \fn int32_t ARM_SPI_Transfer (const void *data_out, void *data_in, uint32_t num) \brief Start sending/receiving data to/from SPI transmitter/receiver. \param[in] data_out Pointer to buffer with data to send to SPI transmitter \param[out] data_in Pointer to buffer for data to receive from SPI receiver \param[in] num Number of data items to transfer \return \ref execution_status \fn uint32_t ARM_SPI_GetDataCount (void) \brief Get transferred data count. \return number of data items transferred \fn int32_t ARM_SPI_Control (uint32_t control, uint32_t arg) \brief Control SPI Interface. \param[in] control Operation \param[in] arg Argument of operation (optional) \return common \ref execution_status and driver specific \ref spi_execution_status \fn ARM_SPI_STATUS ARM_SPI_GetStatus (void) \brief Get SPI status. \return SPI status \ref ARM_SPI_STATUS \fn void ARM_SPI_SignalEvent (uint32_t event) \brief Signal SPI Events. \param[in] event \ref SPI_events notification mask \return none */ typedef void (*ARM_SPI_SignalEvent_t) (uint32_t event); ///< Pointer to \ref ARM_SPI_SignalEvent : Signal SPI Event. /** \brief SPI Driver Capabilities. */ typedef struct _ARM_SPI_CAPABILITIES { uint32_t simplex : 1; ///< supports Simplex Mode (Master and Slave) uint32_t ti_ssi : 1; ///< supports TI Synchronous Serial Interface uint32_t microwire : 1; ///< supports Microwire Interface uint32_t event_mode_fault : 1; ///< Signal Mode Fault event: \ref ARM_SPI_EVENT_MODE_FAULT uint32_t reserved : 28; ///< Reserved (must be zero) } ARM_SPI_CAPABILITIES; /** \brief Access structure of the SPI Driver. */ typedef struct _ARM_DRIVER_SPI { ARM_DRIVER_VERSION (*GetVersion) (void); ///< Pointer to \ref ARM_SPI_GetVersion : Get driver version. ARM_SPI_CAPABILITIES (*GetCapabilities) (void); ///< Pointer to \ref ARM_SPI_GetCapabilities : Get driver capabilities. int32_t (*Initialize) (ARM_SPI_SignalEvent_t cb_event); ///< Pointer to \ref ARM_SPI_Initialize : Initialize SPI Interface. int32_t (*Uninitialize) (void); ///< Pointer to \ref ARM_SPI_Uninitialize : De-initialize SPI Interface. int32_t (*PowerControl) (ARM_POWER_STATE state); ///< Pointer to \ref ARM_SPI_PowerControl : Control SPI Interface Power. int32_t (*Send) (const void *data, uint32_t num); ///< Pointer to \ref ARM_SPI_Send : Start sending data to SPI Interface. int32_t (*Receive) ( void *data, uint32_t num); ///< Pointer to \ref ARM_SPI_Receive : Start receiving data from SPI Interface. int32_t (*Transfer) (const void *data_out, void *data_in, uint32_t num); ///< Pointer to \ref ARM_SPI_Transfer : Start sending/receiving data to/from SPI. uint32_t (*GetDataCount) (void); ///< Pointer to \ref ARM_SPI_GetDataCount : Get transferred data count. int32_t (*Control) (uint32_t control, uint32_t arg); ///< Pointer to \ref ARM_SPI_Control : Control SPI Interface. ARM_SPI_STATUS (*GetStatus) (void); ///< Pointer to \ref ARM_SPI_GetStatus : Get SPI status. } const ARM_DRIVER_SPI; #ifdef __cplusplus } #endif #endif /* DRIVER_SPI_H_ */