91 lines
3.5 KiB
C
91 lines
3.5 KiB
C
/****************************************************************************
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* /nuttx/drivers/i2c/pca9540bdp.h
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*
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* Copyright (C) 2018 Giorgio Groß. All rights reserved.
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* Author: Giorgio Groß <giorgio.gross@robodev.eu>
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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_I2C_PCA9540BDP_H
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#define __DRIVERS_I2C_PCA9540BDP_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/i2c/i2c_master.h>
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#ifdef CONFIG_I2CMULTIPLEXER_PCA9540BDP
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#ifndef CONFIG_PCA9549BDP_I2C_FREQUENCY
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# define CONFIG_PCA9549BDP_I2C_FREQUENCY 400000 /* 400 khz */
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#endif
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/* Bit Definitions to be passed to write calls */
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#define PCA9540BDP_ENABLE 0x4
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#define PCA9540BDP_DISABLE 0x0
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/* Bit masks */
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#define PCA9540BDP_CH_BITMASK 0x03
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#define PCA9540BDP_ENABLE_BITMASK 0x04
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#define PCA9540BDP_CH_BIT 0
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#define PCA9540BDP_CH_NONE_BIT 1
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#define PCA9540BDP_ENABLE_BIT 2
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/****************************************************************************
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* Public Types
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****************************************************************************/
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struct pca9540bdp_dev_s
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{
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FAR struct i2c_master_s *i2c; /* I2C interface */
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uint16_t addr;
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uint8_t state; /* Control register state */
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};
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struct i2c_port_dev_s
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{
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FAR struct i2c_master_s vi2c; /* Nested structure to allow casting as
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* public i2c master */
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uint8_t port; /* Associated port on the mux */
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FAR struct pca9540bdp_dev_s* dev; /* Associated device */
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};
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#endif /* CONFIG_I2CMULTIPLEXER_PCA9540BDP */
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#endif /* __DRIVERS_I2CMULTIPLEXER_PCA9540BDP_H */
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