/****************************************************************************** * include/nuttx/wireless/spirit/include/spirit_spi.h * Header file for NuttX SPIRIT SPI driver interface. * * Copyright (C) 2017 Gregory Nutt. All rights reserved. * Authors: Gregory Nutt * * Derives loosely from similarly licensed SPI interface definitions from * STMicro: * * Copyright(c) 2015 STMicroelectronics * Author: VMA division - AMS * Version 3.2.2 08-July-2015 * * 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 NuttX 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 OWNER 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 __DRIVERS_WIRELESS_SPIRIT_INCLUDE_SPIRIT_SPI_H #define __DRIVERS_WIRELESS_SPIRIT_INCLUDE_SPIRIT_SPI_H /****************************************************************************** * Included Files ******************************************************************************/ #include "spirit_types.h" /****************************************************************************** * Pre-processor Defintiions ******************************************************************************/ /* SPIRIT1 SPI Headers */ #define HEADER_WRITE_MASK 0x00 /* Write mask for header byte */ #define HEADER_READ_MASK 0x01 /* Read mask for header byte */ #define HEADER_ADDRESS_MASK 0x00 /* Address mask for header byte */ #define HEADER_COMMAND_MASK 0x80 /* Command mask for header byte */ #define LINEAR_FIFO_ADDRESS 0xff /* Linear FIFO address */ /* SPIRIT macros to construct headers */ #define __MKHEADER(a,rw) (a | rw) #define WRITE_HEADER __MKHEADER(HEADER_ADDRESS_MASK, HEADER_WRITE_MASK) #define READ_HEADER __MKHEADER(HEADER_ADDRESS_MASK, HEADER_READ_MASK) #define COMMAND_HEADER __MKHEADER(HEADER_COMMAND_MASK, HEADER_WRITE_MASK) /****************************************************************************** * Public Function Prototypes ******************************************************************************/ #ifdef __cplusplus extern "C" { #endif struct spi_dev_s; /* Forward reference */ /****************************************************************************** * Name: spirit_reg_read * * Description: * Read single or multiple SPIRIT1 register * * Input Parameters: * regaddr: Base register's address to be read * buffer: Pointer to the buffer of registers' values to be read * buflen: Number of register values to be read * * Returned Value: * Zero (OK) is returned on success. A negated errno value is returned on * any failure. On success, spirit->state is updated. * ******************************************************************************/ int spirit_reg_read(FAR struct spirit_library_s *spirit, uint8_t regaddr, FAR uint8_t *buffer, unsigned int buflen); /****************************************************************************** * Name: spirit_reg_write * * Description: * Read single or multiple SPIRIT1 register. * * Input Parameters: * spirit - Reference to an instance of the driver state structure. * regaddr - Base register's address to write * buffer - Pointer to the buffer of register values to write * buflen - Number of registers values to be written. * * Returned Value: * Zero (OK) is returned on success. A negated errno value is returned on * any failure. On success, spirit->state is updated. * ******************************************************************************/ int spirit_reg_write(FAR struct spirit_library_s *spirit, uint8_t regaddr, FAR const uint8_t *buffer, unsigned int buflen); /****************************************************************************** * Name: spirit_reg_modify * * Description: * Perform atomic read/modify/write on a single SPIRIT1 register. This is * atomic only in the sense that other accesses to the SPI bus are * prohibited throughout the operation. * * Input Parameters: * spirit - Reference to an instance of the driver state structure. * regaddr - Base register's address to write * clrbits - Bits to clear in the register * setbits - Bits to set in the register * * Returned Value: * Zero (OK) is returned on success. A negated errno value is returned on * any failure. On success, spirit->state is updated. * ******************************************************************************/ int spirit_reg_modify(FAR struct spirit_library_s *spirit, uint8_t regaddr, uint8_t setbits, uint8_t clrbits); /****************************************************************************** * Name: spirit_command * * Description: * Send a command * * Input Parameters: * spirit - Reference to an instance of the driver state structure. * cmd - Command code to be sent * * Returned Value: * Zero (OK) is returned on success. A negated errno value is returned on * any failure. On success, spirit->state is updated. * ******************************************************************************/ int spirit_command(FAR struct spirit_library_s *spirit, uint8_t cmd); /****************************************************************************** * Name: spirit_fifo_read * * Description: * Read data from RX FIFO * * Input Parameters: * spirit - Reference to an instance of the driver state structure. * buffer - Pointer to the buffer of data values to write * buflen - Number of bytes to be written * * Returned Value: * Zero (OK) is returned on success. A negated errno value is returned on * any failure. On success, spirit->state is updated. * ******************************************************************************/ int spirit_fifo_read(FAR struct spirit_library_s *spirit, FAR uint8_t *buffer, unsigned int buflen); /****************************************************************************** * Name: spirit_fifo_write * * Description: * Write data into TX FIFO. * * Input Parameters: * spirit - Reference to an instance of the driver state structure. * buffer - Pointer to the buffer of data values to write * buflen - Number of data values to be written. * * Returned Value: * Zero (OK) is returned on success. A negated errno value is returned on * any failure. On success, spirit->state is updated. * ******************************************************************************/ int spirit_fifo_write(FAR struct spirit_library_s *spirit, FAR const uint8_t *buffer, unsigned int buflen); /****************************************************************************** * Name: spirit_update_status * * Description: * Updates the state field in the driver instance by reading the MC_STATE * register of SPIRIT. * * Input Parameters: * spirit - Reference to an instance of the driver state structure. * * Returned Value: * Zero (OK) is returned on success. A negated errno value is returned on * any failure. On success, spirit->state is updated. * ******************************************************************************/ int spirit_update_status(FAR struct spirit_library_s *spirit); /**************************************************************************** * Name: spirit_waitstatus * * Description: * Poll until the Spirit status is the requested value or until a timeout * occurs. * * Input Parameters: * spirit - Reference to a Spirit library state structure instance * state - That that we are waiting for. * msec - Timeout in millisedonds * * Returned Value: * OK on success; a negated errno on a timeout * * Assumptions: * We have exclusive access to the driver state and to the spirit library. * ****************************************************************************/ int spirit_waitstatus(FAR struct spirit_library_s *spirit, enum spirit_state_e state, unsigned int msec); #ifdef __cplusplus } #endif #endif /* __DRIVERS_WIRELESS_SPIRIT_INCLUDE_SPIRIT_SPI_H */