xref: /btstack/platform/embedded/hal_em9304_spi.h (revision 5e2dc9e820b2722f41a67c0977377abb07c1ebcf)

/*
 * Copyright (C) 2014 BlueKitchen GmbH
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. Neither the name of the copyright holders nor the names of
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 * 4. Any redistribution, use, or modification is done solely for
 *    personal benefit and not for any commercial purpose or for
 *    monetary gain.
 *
 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH 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 MATTHIAS
 * RINGWALD 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.
 *
 * Please inquire about commercial licensing options at
 * [email protected]
 *
 */

/*
 *  hal_em9304_spi.h
 *
 *  Hardware Abstraction Layer for EM9304 connected via SPI with additional RDY Interrupt line
 *
 */
#ifndef __HAL_EM9304_SPI_H
#define __HAL_EM9304_SPI_H

#include <stdint.h>

#if defined __cplusplus
extern "C" {
#endif

/* API_START */

/**
 * @brief Initialize SPI
 */
void hal_em9304_spi_init(void);

/**
 * @brief Set callback for RDY - can be called from ISR context
 * @param callback
 */
void hal_em9304_spi_set_ready_callback(void (*callback)(void));

/**
 * @brief Set callback for transfer complete - can be called from ISR context
 * @param callback
 */
void hal_em9304_spi_set_transfer_done_callback(void (*callback)(void));

/**
 * @brief Enable READY IRQ
 */
void hal_em9304_spi_enable_ready_interrupt(void);

/**
 * @brief Disable READY IRQ
 */
void hal_em9304_spi_disable_ready_interrupt(void);

/**
 * @brief Poll READY state
 */
int hal_em9304_spi_get_ready();

/**
 * @brief Set Chip Selet
 * @param enable
 */
void hal_em9304_spi_set_chip_select(int enable);

/**
 * @brief Check if full duplex operation via hal_em9304_spi_transceive is supported
 */
int  hal_em9304_spi_fullduplex_support(void);

/**
 * @brief Transmit and Receive bytes via SPI
 * @param tx_data buffer to transmit
 * @param rx_data buffer to receive into
 * @param len
 */
void hal_em9304_spi_transceive(const uint8_t * tx_data, uint8_t * rx_data, uint16_t len);

/**
 * @brief Transmit bytes via SPI
 * @param tx_data buffer to transmit
 * @param len
 */
void hal_em9304_spi_transmit(const uint8_t * tx_data, uint16_t len);

/**
 * @brief Receive bytes via SPI
 * @param rx_data buffer to receive into
 * @param len
 */
void hal_em9304_spi_receive(uint8_t * rx_data, uint16_t len);

/* API_END */

#if defined __cplusplus
}
#endif

#endif // __HAL_EM9304_SPI_H