207 lines
8.8 KiB
C
207 lines
8.8 KiB
C
/**
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* Copyright (c) 2014 - 2020, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef APP_SPI_MASTER_H
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#define APP_SPI_MASTER_H
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#include <stdint.h>
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#include <stdlib.h>
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#include "boards.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define _SPI_5W_
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/**@brief Struct containing configuration parameters of the SPI master. */
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typedef struct
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{
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uint32_t SPI_Freq; /**< SPI frequency. */
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uint32_t SPI_Pin_SCK; /**< SCK pin number. */
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uint32_t SPI_Pin_MISO; /**< MISO pin number. */
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uint32_t SPI_Pin_MOSI; /**< MOSI pin number .*/
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uint32_t SPI_Pin_SS; /**< Slave select pin number. */
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uint8_t SPI_ORDER; /**< Bytes order MSBFIRST or LSBFIRST. */
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uint8_t SPI_CPOL; /**< Serial clock polarity ACTIVEHIGH or ACTIVELOW. */
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uint8_t SPI_CPHA; /**< Serial clock phase LEADING or TRAILING. */
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} spi_master_config_t;
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/**@brief SPI master driver events types. */
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typedef enum
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{
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SPI_MASTER_EVT_TRANSFER_STARTED = 0, /**< An event indicating that transfer has been started */
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SPI_MASTER_EVT_TRANSFER_COMPLETED, /**< An event indicating that transfer has been completed */
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SPI_MASTER_EVT_TRANSFER_ABORTED, /**< An event indicating that transfer has been aborted */
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SPI_MASTER_EVT_TRANSFER_RESTARTED, /**< An event indicating that transfer has been resumed */
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SPI_MASTER_EVT_FIRST_BYTE_RECEIVED, /**< An event indicating end of one byte transfer */
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SPI_MASTER_EVT_TYPE_MAX /**< Enumeration upper bound. */
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} spi_master_evt_type_t;
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/**@brief Struct containing parameters of the SPI MASTER event */
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typedef struct
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{
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spi_master_evt_type_t type; /**< Type of an event */
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uint16_t data; /**< event data - context dependent */
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} spi_master_evt_t;
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/**@brief SPI MASTER internal states types. */
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typedef enum
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{
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SPI_MASTER_STATE_DISABLED, /**< A state indicating that SPI master is disabled. */
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SPI_MASTER_STATE_BUSY, /**< A state indicating that SPI master is sending now. */
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SPI_MASTER_STATE_ABORTED,
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SPI_MASTER_STATE_IDLE /**< A state indicating that SPI master is idle now. */
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} spi_master_state_t;
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/**@brief Instances of SPI master module. */
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typedef enum
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{
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#ifdef SPI_MASTER_0_ENABLE
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SPI_MASTER_0, /**< A instance of SPI master 0. */
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#endif
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#ifdef SPI_MASTER_1_ENABLE
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SPI_MASTER_1, /**< A instance of SPI master 1. */
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#endif
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SPI_MASTER_HW_ENABLED_COUNT /**< A number of enabled instances of SPI master. */
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} spi_master_hw_instance_t;
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/**@brief Type of generic callback function handler to be used by all SPI MASTER driver events.
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*
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* @param[in] spi_master_evt SPI MASTER driver event.
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*/
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typedef void (*spi_master_event_handler_t) (spi_master_evt_t spi_master_evt);
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/**@brief Function for opening and initializing a SPI master driver.
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*
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* @note Function initializes SPI master hardware and internal module states, unregister events callback.
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*
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* @warning If the function has been already called, the function @ref spi_master_close has to be
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* called before spi_master_open can be called again.
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*
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* @param[in] spi_master_hw_instance Instance of SPI master module.
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* @param[in] p_spi_master_config Pointer to configuration structure which will be used
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* to initialize SPI MASTER hardware.
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*
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* @retval NRF_SUCCESS Operation success.
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* @retval NRF_ERROR_INVALID_STATE Operation failure. The function has been already called.
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* To call it again the function @ref spi_master_close
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* has to be called previously.
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* @retval NRF_ERROR_NULL Operation failure. NULL pointer supplied.
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*/
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uint32_t spi_master_open(const spi_master_hw_instance_t spi_master_hw_instance,
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spi_master_config_t const * const p_spi_master_config);
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/**@brief Function for closing a SPI MASTER driver.
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*
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* @note Function disable hardware, reset internal module states and unregister events callback
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* function.
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*
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* @param[in] spi_master_hw_instance A instance of SPI master.
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*/
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void spi_master_close(const spi_master_hw_instance_t spi_master_hw_instance);
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/**@brief Function for transferring data between SPI master and SPI slave
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*
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* @note Function registers buffers pointed by p_tx_buf and p_rx_buf parameters, after that starts transmission.
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* Function generates an event of type @ref SPI_MASTER_EVT_TRANSFER_STARTED when transfer has been started
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* and @ref SPI_MASTER_EVT_TRANSFER_COMPLETED when transfer has been completed.
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*
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* @param[in] spi_master_hw_instance Instance of SPI master module.
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* @param[in] p_tx_buf Pointer to a transmit buffer.
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* @param[in] tx_buf_len Number of octets to the transfer.
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* @param[out] p_rx_buf Pointer to a receive buffer.
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* @param[in] rx_buf_len Number of octets to be received.
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*
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* @retval NRF_SUCCESS Operation success. Packet was registered to the transmission
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* and event will be send upon transmission completion.
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* @retval NRF_ERROR_BUSY Operation failure. Transmitting of a data is in progress.
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*/
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uint32_t spi_master_send_recv(const spi_master_hw_instance_t spi_master_hw_instance,
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uint8_t * const p_tx_buf, const uint16_t tx_buf_len,
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uint8_t * const p_rx_buf, const uint16_t rx_buf_len);
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/**@brief Function for registration event handler.
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*
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* @note Function registers a event handler to be used by SPI MASTER driver for sending events.
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* @ref SPI_MASTER_EVT_TRANSFER_STARTED and @ref SPI_MASTER_EVT_TRANSFER_COMPLETED.
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*
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* @param[in] spi_master_hw_instance Instance of SPI master module.
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* @param[in] event_handler Generic callback function handler to be used
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* by all SPI master driver events.
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*/
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void spi_master_evt_handler_reg(const spi_master_hw_instance_t spi_master_hw_instance,
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spi_master_event_handler_t event_handler);
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/**@brief Function for getting current state of the SPI master driver.
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*
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* @note Function gets current state of the SPI master driver.
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*
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* @param[in] spi_master_hw_instance Instance of SPI master module.
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*
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* @retval SPI_MASTER_STATE_DISABLED SPI MASTER is disabled.
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* @retval SPI_MASTER_STATE_BUSY SPI_MASTER is sending now.
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* @retval SPI_MASTER_STATE_IDLE SPI_MASTER is idle now.
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*/
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spi_master_state_t spi_master_get_state(const spi_master_hw_instance_t spi_master_hw_instance);
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#ifdef _SPI_5W_
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uint32_t spi_master_abort(const spi_master_hw_instance_t spi_master_hw_instance);
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uint32_t spi_master_restart(const spi_master_hw_instance_t spi_master_hw_instance);
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void spi_5W_master_evt_handler_reg(const spi_master_hw_instance_t spi_master_hw_instance,
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spi_master_event_handler_t event_handler);
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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