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i2c_driver.h
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i2c_driver.h
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/*
* Copyright (c) 2012, Regents of the University of California
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of the University of California, Berkeley nor the names
* of its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*
* I2C driver
*
* by Andrew Pullin
*
* v.0.1
*
* Note: For functions in which the I2C channel is specified, if the value
* passed for the channel number is anything other than 1, then channel 2
* will be used by default.
*/
#ifndef __I2C_DRIVER_H
#define __I2C_DRIVER_H
/***********************************************************************
* Function Name : i2cSetup
* Description : Setup I2C transmission
* Parameters : None
* Return Value : None
***********************************************************************/
//void i2cSetup(void);
/***********************************************************************
* Function Name : i2cStartTx
* Description : Start I2C transmission on a specified I2C channel
* Parameters : channel is the channel number
* Return Value : None
***********************************************************************/
void i2cStartTx(unsigned char channel);
/***********************************************************************
* Function Name : i2cEndTx
* Description : End I2C transmission on a specified I2C channel
* Parameters : channel is the channel number
* Return Value : None
***********************************************************************/
void i2cEndTx(unsigned char channel);
/***********************************************************************
* Function Name : i2cSendNACK
* Description : Send NACK to a specified I2C channel
* Parameters : channel is the channel number
* Return Value : None
***********************************************************************/
void i2cSendNACK(unsigned char channel);
/***********************************************************************
* Function Name : i2cReceiveByte
* Description : Receive a byte from a specified I2C channel
* Parameters : channel is the channel number
* Return Value : None
***********************************************************************/
unsigned char i2cReceiveByte(unsigned char channel);
/***********************************************************************
* Function Name : i2cSendByte
* Description : Send a byte to a specified I2C channel
* Parameters : channel is the channel number
* byte - a byte to send
* Return Value : None
***********************************************************************/
void i2cSendByte(unsigned char channel, unsigned char byte);
/***********************************************************************
* Function Name : i2cReadString
* Description : It reads a predetermined data string from the I2C bus.
* Parameters : channel is the I2C channel to read from
* length is the string length to read
* data is the storage for received gyro data
* data_wait is the timeout value
* Return Value : Number of bytes read before timeout.
************************************************************************/
unsigned int i2cReadString(unsigned char channel, unsigned length,
unsigned char * data, unsigned int data_wait);
//Checks for I2C bus errors, returns error code 1,2,3,4 or 11,12,13,14
unsigned int i2cError(unsigned char channel);
#endif // __I2C_DRIVER_H