76 lines
2.7 KiB
C
76 lines
2.7 KiB
C
/****************************************************************************
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* drivers/i2c/pca9540bdp.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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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