83 lines
2.8 KiB
C
83 lines
2.8 KiB
C
/****************************************************************************
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* include/nuttx/i2c/i2c_bitbang.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 __INCLUDE_NUTTX_I2C_I2C_BITBANG_H
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#define __INCLUDE_NUTTX_I2C_I2C_BITBANG_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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#include <stdbool.h>
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/****************************************************************************
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* Public Types
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****************************************************************************/
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struct i2c_bitbang_lower_dev_s;
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struct i2c_bitbang_lower_ops_s
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{
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/* Initialize pins to appropriate state (usually open-drain) */
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CODE void (*initialize)(FAR struct i2c_bitbang_lower_dev_s *lower);
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/* Set high/low level for SCL/SDA pins */
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CODE void (*set_scl)(FAR struct i2c_bitbang_lower_dev_s *lower, bool high);
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CODE void (*set_sda)(FAR struct i2c_bitbang_lower_dev_s *lower, bool high);
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/* Read level of SCL/SDA pins */
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CODE bool (*get_scl)(FAR struct i2c_bitbang_lower_dev_s *lower);
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CODE bool (*get_sda)(FAR struct i2c_bitbang_lower_dev_s *lower);
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};
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struct i2c_bitbang_lower_dev_s
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{
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FAR const struct i2c_bitbang_lower_ops_s *ops;
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FAR void *priv;
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};
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: i2c_bitbang_initialize
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*
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* Description:
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* Initialize a bitbang I2C device instance
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*
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* Input Parameters:
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* lower - Lower half of driver
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*
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* Returned Value:
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* Pointer to a the I2C instance
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*
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****************************************************************************/
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FAR struct i2c_master_s *i2c_bitbang_initialize(
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FAR struct i2c_bitbang_lower_dev_s *lower);
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#endif /* __INCLUDE_NUTTX_I2C_I2C_BITBANG_H */
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