115 lines
4.1 KiB
C
115 lines
4.1 KiB
C
/****************************************************************************
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* arch/arm/include/rp2040/i2c_slave.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 __ARCH_ARM_INCLUDE_RP2040_I2C_SLAVE_H
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#define __ARCH_ARM_INCLUDE_RP2040_I2C_SLAVE_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_slave.h>
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#ifndef __ASSEMBLY__
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/* There is no driver for I2C slave operations. To create an I2C slave,
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* include this file (as: <arch/chip/i2c_slave.h>) and use either
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* rp2040_i2c0_slave_initialize or rp2040_i2c1_slave_initialize to
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* initialize the I2C for slave operations.
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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: rp2040_i2c0_slave_initialize
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*
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* Description:
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* Initialize I2C controller zero for slave operation, and return a pointer
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* to the instance of struct i2c_slave_s. This function should only be
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* called once of a give controller.
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*
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* Note: the same port cannot be initalized as both master and slave.
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*
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* Input Parameters:
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* rx_buffer - Buffer for data transmitted to us by an I2C master.
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* rx_buffer_len - Length of rx_buffer.
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* callback - Callback function called when messages are received.
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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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#ifdef CONFIG_RP2040_I2C0_SLAVE
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struct i2c_slave_s *rp2040_i2c0_slave_initialize
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(uint8_t *rx_buffer,
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size_t rx_buffer_len,
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i2c_slave_callback_t *callback);
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#endif
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/****************************************************************************
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* Name: rp2040_i2c1_slave_initialize
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*
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* Description:
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* Initialize I2C controller zero for slave operation, and return a pointer
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* to the instance of struct i2c_slave_s. This function should only be
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* called once of a give controller.
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*
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* Note: the same port cannot be initalized as both master and slave.
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*
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* Input Parameters:
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* rx_buffer - Buffer for data transmitted to us by an I2C master.
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* rx_buffer_len - Length of rx_buffer.
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* callback - Callback function called when messages are received.
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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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#ifdef CONFIG_RP2040_I2C1_SLAVE
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struct i2c_slave_s *rp2040_i2c1_slave_initialize
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(uint8_t *rx_buffer,
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size_t rx_buffer_len,
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i2c_slave_callback_t *callback);
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#endif
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __ARCH_ARM_INCLUDE_RP2040_I2C_SLAVE_H */
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