/*
FreeRTOS V8 .2 .0 rc1 - Copyright ( C ) 2014 Real Time Engineers Ltd .
All rights reserved
VISIT http : //www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
This file is part of the FreeRTOS distribution .
FreeRTOS is free software ; you can redistribute it and / or modify it under
the terms of the GNU General Public License ( version 2 ) as published by the
Free Software Foundation > > ! AND MODIFIED BY ! < < the FreeRTOS exception .
> > ! NOTE : The modification to the GPL is included to allow you to ! < <
> > ! distribute a combined work that includes FreeRTOS without being ! < <
> > ! obliged to provide the source code for proprietary components ! < <
> > ! outside of the FreeRTOS kernel . ! < <
FreeRTOS is distributed in the hope that it will be useful , but WITHOUT ANY
WARRANTY ; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE . Full license text is available on the following
link : http : //www.freertos.org/a00114.html
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* *
* Having a problem ? Start by reading the FAQ " My application does *
* not run , what could be wrong ? " . Have you defined configASSERT()? *
* *
* http : //www.FreeRTOS.org/FAQHelp.html *
* *
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* *
* FreeRTOS provides completely free yet professionally developed , *
* robust , strictly quality controlled , supported , and cross *
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* is the industry ' s de facto standard . *
* *
* Help yourself get started quickly while simultaneously helping *
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* *
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* *
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* from Richard ensures your team will gain directly from his in - depth *
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* *
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http : //www.FreeRTOS.org - Documentation, books, training, latest versions,
license and Real Time Engineers Ltd . contact details .
http : //www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS + Trace - an indispensable productivity tool , a DOS
compatible FAT file system , and our tiny thread aware UDP / IP stack .
http : //www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
Come and try FreeRTOS + TCP , our new open source TCP / IP stack for FreeRTOS .
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Integrity Systems ltd . to sell under the OpenRTOS brand . Low cost OpenRTOS
licenses offer ticketed support , indemnification and commercial middleware .
http : //www.SafeRTOS.com - High Integrity Systems also provide a safety
engineered and independently SIL3 certified version for use in safety and
mission critical applications that require provable dependability .
1 tab = = 4 spaces !
*/
# ifndef I2C_H
# define I2C_H
/* Structure used to capture the I2C message details. The structure is then
* queued for processing by the I2C ISR .
*/
typedef struct AN_I2C_MESSAGE
{
long lMessageLength ; /*< How many bytes of data to send or received - excluding the buffer address. */
unsigned char ucSlaveAddress ; /*< The slave address of the WIZnet on the I2C bus. */
unsigned char ucBufferAddressLowByte ; /*< The address within the WIZnet device to which data should be read from / written to. */
unsigned char ucBufferAddressHighByte ; /*< As above, high byte. */
SemaphoreHandle_t xMessageCompleteSemaphore ; /*< Contains a reference to a semaphore if the application tasks wants notifying when the message has been transacted. */
unsigned char * pucBuffer ; /*< Pointer to the buffer from where data will be read for transmission, or into which received data will be placed. */
} xI2CMessage ;
/* Constants to use as the ulDirection parameter of i2cMessage(). */
# define i2cWRITE ( ( unsigned long ) 0 )
# define i2cREAD ( ( unsigned long ) 1 )
/**
* Must be called once before any calls to i2cMessage .
*/
void i2cInit ( void ) ;
/**
* Send or receive a message over the I2C bus .
*
* @ param pucMessage The data to be transmitted or the buffer into which
* received data will be placed .
*
* @ param lMessageLength The number of bytes to either transmit or receive .
*
* @ param ucSlaveAddress The slave address of the WIZNet device on the I2C bus .
*
* @ param usBufferAddress The address within the WIZNet device to which data is
* either written to or read from . The WIZnet has it ' s
* own Rx and Tx buffers .
*
* @ param ulDirection Must be either i2cWRITE or i2cREAD as # defined above .
*
* @ param xMessageCompleteSemaphore
* Can be used to pass a semaphore reference if the
* calling task want notification of when the message has
* completed . Otherwise NULL can be passed .
*
* @ param xBlockTime The time to wait for a space in the message queue to
* become available should one not be available
* immediately .
*/
void i2cMessage ( const unsigned char * const pucMessage , long lMessageLength , unsigned char ucSlaveAddress , unsigned short usBufferAddress , unsigned long ulDirection , SemaphoreHandle_t xMessageCompleteSemaphore , TickType_t xBlockTime ) ;
# endif
