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206 lines
6.2 KiB
C
206 lines
6.2 KiB
C
/**
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* \file
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*
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* \brief I2C Master Hardware Proxy Layer(HPL) declaration.
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*
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* Copyright (c) 2015-2018 Microchip Technology Inc. and its subsidiaries.
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*
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* \asf_license_start
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*
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* \page License
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*
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* Subject to your compliance with these terms, you may use Microchip
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* software and any derivatives exclusively with Microchip products.
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* It is your responsibility to comply with third party license terms applicable
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* to your use of third party software (including open source software) that
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* may accompany Microchip software.
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*
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* THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
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* WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
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* INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
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* AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
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* LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
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* LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
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* SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
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* POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT
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* ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
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* RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
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* THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
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*
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* \asf_license_stop
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*
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*/
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#ifndef _HPL_I2C_M_ASYNC_H_INCLUDED
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#define _HPL_I2C_M_ASYNC_H_INCLUDED
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#include "hpl_i2c_m_sync.h"
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#include "hpl_irq.h"
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#include "utils.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \brief i2c master callback names
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*/
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enum _i2c_m_async_callback_type {
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I2C_M_ASYNC_DEVICE_ERROR,
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I2C_M_ASYNC_DEVICE_TX_COMPLETE,
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I2C_M_ASYNC_DEVICE_RX_COMPLETE
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};
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struct _i2c_m_async_device;
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typedef void (*_i2c_complete_cb_t)(struct _i2c_m_async_device *i2c_dev);
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typedef void (*_i2c_error_cb_t)(struct _i2c_m_async_device *i2c_dev, int32_t errcode);
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/**
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* \brief i2c callback pointers structure
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*/
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struct _i2c_m_async_callback {
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_i2c_error_cb_t error;
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_i2c_complete_cb_t tx_complete;
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_i2c_complete_cb_t rx_complete;
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};
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/**
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* \brief i2c device structure
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*/
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struct _i2c_m_async_device {
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struct _i2c_m_service service;
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void * hw;
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struct _i2c_m_async_callback cb;
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struct _irq_descriptor irq;
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};
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/**
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* \name HPL functions
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*/
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/**
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* \brief Initialize I2C in interrupt mode
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*
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* This function does low level I2C configuration.
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*
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* \param[in] i2c_dev The pointer to i2c interrupt device structure
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* \param[in] hw The pointer to hardware instance
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*
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* \return Return 0 for success and negative value for error
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*/
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int32_t _i2c_m_async_init(struct _i2c_m_async_device *const i2c_dev, void *const hw);
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/**
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* \brief Deinitialize I2C in interrupt mode
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*
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* \param[in] i2c_dev The pointer to i2c device structure
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*
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* \return Return 0 for success and negative value for error
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*/
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int32_t _i2c_m_async_deinit(struct _i2c_m_async_device *const i2c_dev);
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/**
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* \brief Enable I2C module
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*
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* This function does low level I2C enable.
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*
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* \param[in] i2c_dev The pointer to i2c device structure
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*
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* \return Return 0 for success and negative value for error
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*/
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int32_t _i2c_m_async_enable(struct _i2c_m_async_device *const i2c_dev);
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/**
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* \brief Disable I2C module
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*
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* This function does low level I2C disable.
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*
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* \param[in] i2c_dev The pointer to i2c device structure
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*
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* \return Return 0 for success and negative value for error
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*/
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int32_t _i2c_m_async_disable(struct _i2c_m_async_device *const i2c_dev);
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/**
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* \brief Transfer data by I2C
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*
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* This function does low level I2C data transfer.
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*
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* \param[in] i2c_dev The pointer to i2c device structure
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* \param[in] msg The pointer to i2c msg structure
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*
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* \return Return 0 for success and negative value for error
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*/
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int32_t _i2c_m_async_transfer(struct _i2c_m_async_device *const i2c_dev, struct _i2c_m_msg *msg);
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/**
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* \brief Set baud rate of I2C
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*
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* This function does low level I2C set baud rate.
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*
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* \param[in] i2c_dev The pointer to i2c device structure
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* \param[in] clkrate The clock rate(KHz) input to i2c module
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* \param[in] baudrate The demand baud rate(KHz) of i2c module
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*
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* \return Return 0 for success and negative value for error
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*/
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int32_t _i2c_m_async_set_baudrate(struct _i2c_m_async_device *const i2c_dev, uint32_t clkrate, uint32_t baudrate);
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/**
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* \brief Register callback to I2C
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*
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* This function does low level I2C callback register.
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*
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* \param[in] i2c_dev The pointer to i2c device structure
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* \param[in] cb_type The callback type request
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* \param[in] func The callback function pointer
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*
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* \return Return 0 for success and negative value for error
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*/
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int32_t _i2c_m_async_register_callback(struct _i2c_m_async_device *i2c_dev, enum _i2c_m_async_callback_type cb_type,
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FUNC_PTR func);
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/**
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* \brief Generate stop condition on the I2C bus
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*
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* This function will generate a stop condition on the I2C bus
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*
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* \param[in] i2c_m_async_descriptor An i2c descriptor which is used to communicate through I2C
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*
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* \return Operation status
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* \retval 0 Operation executed successfully
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* \retval <0 Operation failed
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*/
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int32_t _i2c_m_async_send_stop(struct _i2c_m_async_device *const i2c_dev);
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/**
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* \brief Returns the number of bytes left or not used in the I2C message buffer
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*
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* This function will return the number of bytes left (not written to the bus) or still free
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* (not received from the bus) in the message buffer, depending on direction of transmission.
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*
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* \param[in] i2c_m_async_descriptor An i2c descriptor which is used to communicate through I2C
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*
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* \return Number of bytes or error code
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* \retval >0 Positive number indicating bytes left
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* \retval 0 Buffer is full/empty depending on direction
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* \retval <0 Error code
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*/
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int32_t _i2c_m_async_get_bytes_left(struct _i2c_m_async_device *const i2c_dev);
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/**
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* \brief Enable/disable I2C master interrupt
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*
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* param[in] device The pointer to I2C master device instance
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* param[in] type The type of interrupt to disable/enable if applicable
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* param[in] state Enable or disable
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*/
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void _i2c_m_async_set_irq_state(struct _i2c_m_async_device *const device, const enum _i2c_m_async_callback_type type,
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const bool state);
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#ifdef __cplusplus
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}
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#endif
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#endif
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