82 lines
3.1 KiB
C
82 lines
3.1 KiB
C
/*
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* Copyright (c) 2012, Freescale Semiconductor, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* o Redistributions of source code must retain the above copyright notice, this list
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* of conditions and the following disclaimer.
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*
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* o Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* o Neither the name of Freescale Semiconductor, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __IMX_I2C_INTERNAL_H__
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#define __IMX_I2C_INTERNAL_H__
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#include "imx_i2c.h"
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#include "registers/regsi2c.h"
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////////////////////////////////////////////////////////////////////////////////
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// Definitions
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////////////////////////////////////////////////////////////////////////////////
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//! Max number of operations to wait to receive ack.
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#define WAIT_RXAK_LOOPS 1000000
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//! Max number of operations to wait until busy.
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#define WAIT_BUSY_LOOPS 100000
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////////////////////////////////////////////////////////////////////////////////
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// API
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////////////////////////////////////////////////////////////////////////////////
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#if defined(__cplusplus)
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extern "C" {
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#endif
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/*!
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* @brief Setup I2C interrupt.
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*
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* It enables or disables the related HW module interrupt, and attached the related
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* sub-routine into the vector table.
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*
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* @param port Pointer to the I2C module structure.
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* @param state Enable or disable the interrupt. Pass true to enable.
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*/
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void i2c_setup_interrupt(uint32_t instance, void (*irq_subroutine)(void), bool state);
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/*!
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* @brief I2C interrupt routine for slave transfers.
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*/
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void i2c_slave_interrupt_routine(void);
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//! @brief Returns the I2C controller instance from a request struct.
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unsigned i2c_get_request_instance(const imx_i2c_request_t * rq);
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#if defined(__cplusplus)
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}
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#endif
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#endif // __IMX_I2C_INTERNAL_H__
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////////////////////////////////////////////////////////////////////////////////
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// EOF
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////////////////////////////////////////////////////////////////////////////////
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