92 lines
3.3 KiB
C
92 lines
3.3 KiB
C
/****************************************************************************
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* arch/xtensa/src/esp32s2/esp32s2_i2c.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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/****************************************************************************
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* Included Files
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****************************************************************************/
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#ifndef __ARCH_XTENSA_SRC_ESP32S2_ESP32S2_I2C_H
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#define __ARCH_XTENSA_SRC_ESP32S2_ESP32S2_I2C_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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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#ifndef __ASSEMBLY__
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#ifdef CONFIG_ESP32S2_I2C0
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# define ESP32S2_I2C0 0
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#endif
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#ifdef CONFIG_ESP32S2_I2C1
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# define ESP32S2_I2C1 1
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#endif
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: esp32s2_i2cbus_initialize
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*
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* Description:
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* Initialize the selected I2C port. And return a unique instance of struct
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* struct i2c_master_s. This function may be called to obtain multiple
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* instances of the interface, each of which may be set up with a
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* different frequency and slave address.
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*
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* Input Parameters:
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* Port number (for hardware that has multiple I2C interfaces)
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*
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* Returned Value:
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* Valid I2C device structure reference on success; a NULL on failure
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*
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****************************************************************************/
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struct i2c_master_s *esp32s2_i2cbus_initialize(int port);
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/****************************************************************************
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* Name: esp32s2_i2cbus_uninitialize
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*
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* Description:
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* De-initialize the selected I2C port, and power down the device.
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*
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* Input Parameters:
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* Device structure as returned by the esp32s2_i2cbus_initialize()
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*
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* Returned Value:
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* OK on success, ERROR when internal reference count mismatch or dev
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* points to invalid hardware device.
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*
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****************************************************************************/
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int esp32s2_i2cbus_uninitialize(struct i2c_master_s *dev);
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#endif /* __ASSEMBLY__ */
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#endif /* __ARCH_XTENSA_SRC_ESP32S2_ESP32S2_I2C_H */
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