251 lines
9.3 KiB
C
251 lines
9.3 KiB
C
/******************************************************************************
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* include/nuttx/wireless/spirit/include/spirit_spi.h
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* Header file for NuttX SPIRIT SPI driver interface.
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*
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* Copyright (C) 2017 Gregory Nutt. All rights reserved.
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* Authors: Gregory Nutt <gnutt@nuttx.org>
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*
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* Derives loosely from similarly licensed SPI interface definitions from
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* STMicro:
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*
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* Copyright(c) 2015 STMicroelectronics
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* Author: VMA division - AMS
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* Version 3.2.2 08-July-2015
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************/
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#ifndef __DRIVERS_WIRELESS_SPIRIT_INCLUDE_SPIRIT_SPI_H
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#define __DRIVERS_WIRELESS_SPIRIT_INCLUDE_SPIRIT_SPI_H
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/******************************************************************************
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* Included Files
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******************************************************************************/
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#include "spirit_types.h"
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/******************************************************************************
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* Pre-processor Defintiions
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******************************************************************************/
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/* SPIRIT1 SPI Headers */
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#define HEADER_WRITE_MASK 0x00 /* Write mask for header byte */
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#define HEADER_READ_MASK 0x01 /* Read mask for header byte */
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#define HEADER_ADDRESS_MASK 0x00 /* Address mask for header byte */
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#define HEADER_COMMAND_MASK 0x80 /* Command mask for header byte */
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#define LINEAR_FIFO_ADDRESS 0xff /* Linear FIFO address */
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/* SPIRIT macros to construct headers */
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#define __MKHEADER(a,rw) (a | rw)
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#define WRITE_HEADER __MKHEADER(HEADER_ADDRESS_MASK, HEADER_WRITE_MASK)
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#define READ_HEADER __MKHEADER(HEADER_ADDRESS_MASK, HEADER_READ_MASK)
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#define COMMAND_HEADER __MKHEADER(HEADER_COMMAND_MASK, HEADER_WRITE_MASK)
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/******************************************************************************
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* Public Function Prototypes
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******************************************************************************/
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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struct spi_dev_s; /* Forward reference */
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/******************************************************************************
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* Name: spirit_reg_read
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*
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* Description:
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* Read single or multiple SPIRIT1 register
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*
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* Input parameters:
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* regaddr: Base register's address to be read
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* buffer: Pointer to the buffer of registers' values to be read
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* buflen: Number of register values to be read
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*
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* Returned Value:
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* Zero (OK) is returned on success. A negated errno value is returned on
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* any failure. On success, spirit->state is updated.
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*
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******************************************************************************/
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int spirit_reg_read(FAR struct spirit_library_s *spirit, uint8_t regaddr,
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FAR uint8_t *buffer, unsigned int buflen);
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/******************************************************************************
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* Name: spirit_reg_write
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*
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* Description:
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* Read single or multiple SPIRIT1 register.
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*
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* Input parameters:
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* spirit - Reference to an instance of the driver state stucture.
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* regaddr - Base register's address to write
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* buffer - Pointer to the buffer of register values to write
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* buflen - Number of registers values to be written.
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*
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* Returned Value:
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* Zero (OK) is returned on success. A negated errno value is returned on
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* any failure. On success, spirit->state is updated.
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*
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******************************************************************************/
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int spirit_reg_write(FAR struct spirit_library_s *spirit, uint8_t regaddr,
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FAR const uint8_t *buffer, unsigned int buflen);
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/******************************************************************************
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* Name: spirit_reg_modify
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*
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* Description:
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* Perform atomic read/modify/write on a single SPIRIT1 register. This is
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* atomic only in the sense that other accesses to the SPI bus are
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* prohibited throughout the operation.
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*
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* Input parameters:
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* spirit - Reference to an instance of the driver state stucture.
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* regaddr - Base register's address to write
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* clrbits - Bits to clear in the register
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* setbits - Bits to set in the regiser
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*
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* Returned Value:
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* Zero (OK) is returned on success. A negated errno value is returned on
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* any failure. On success, spirit->state is updated.
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*
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******************************************************************************/
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int spirit_reg_modify(FAR struct spirit_library_s *spirit, uint8_t regaddr,
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uint8_t setbits, uint8_t clrbits);
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/******************************************************************************
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* Name: spirit_command
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*
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* Description:
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* Send a command
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*
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* Input parameters:
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* spirit - Reference to an instance of the driver state stucture.
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* cmd - Command code to be sent
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*
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* Returned Value:
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* Zero (OK) is returned on success. A negated errno value is returned on
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* any failure. On success, spirit->state is updated.
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*
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******************************************************************************/
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int spirit_command(FAR struct spirit_library_s *spirit, uint8_t cmd);
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/******************************************************************************
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* Name: spirit_fifo_read
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*
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* Description:
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* Read data from RX FIFO
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*
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* Input parameters:
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* spirit - Reference to an instance of the driver state stucture.
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* buffer - Pointer to the buffer of data values to write
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* buflen - Number of bytes to be written
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*
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* Returned Value:
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* Zero (OK) is returned on success. A negated errno value is returned on
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* any failure. On success, spirit->state is updated.
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*
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******************************************************************************/
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int spirit_fifo_read(FAR struct spirit_library_s *spirit, FAR uint8_t *buffer,
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unsigned int buflen);
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/******************************************************************************
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* Name: spirit_fifo_write
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*
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* Description:
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* Write data into TX FIFO.
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*
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* Input parameters:
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* spirit - Reference to an instance of the driver state stucture.
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* buffer - Pointer to the buffer of data values to write
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* buflen - Number of data values to be written.
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*
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* Returned Value:
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* Zero (OK) is returned on success. A negated errno value is returned on
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* any failure. On success, spirit->state is updated.
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*
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******************************************************************************/
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int spirit_fifo_write(FAR struct spirit_library_s *spirit,
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FAR const uint8_t *buffer, unsigned int buflen);
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/******************************************************************************
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* Name: spirit_update_status
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*
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* Description:
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* Updates the state field in the driver instance by reading the MC_STATE
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* register of SPIRIT.
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*
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* Input Parameters:
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* spirit - Reference to an instance of the driver state stucture.
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*
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* Returned Value:
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* Zero (OK) is returned on success. A negated errno value is returned on
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* any failure. On success, spirit->state is updated.
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*
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******************************************************************************/
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int spirit_update_status(FAR struct spirit_library_s *spirit);
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/****************************************************************************
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* Name: spirit_waitstatus
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*
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* Description:
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* Poll until the Spirit status is the requested value or until a timeout
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* occurs.
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*
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* Parameters:
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* spirit - Reference to a Spirit library state structure instance
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* state - That that we are waiting for.
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* msec - Timeout in millisedonds
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*
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* Returned Value:
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* OK on success; a negated errno on a timeout
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*
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* Assumptions:
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* We have exclusive access to the driver state and to the spirit library.
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*
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****************************************************************************/
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int spirit_waitstatus(FAR struct spirit_library_s *spirit,
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enum spirit_state_e state, unsigned int msec);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __DRIVERS_WIRELESS_SPIRIT_INCLUDE_SPIRIT_SPI_H */
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