/* | |
FreeRTOS V9.0.0rc2 - Copyright (C) 2016 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 | |
*************************************************************************** | |
* * | |
* FreeRTOS provides completely free yet professionally developed, * | |
* robust, strictly quality controlled, supported, and cross * | |
* platform software that is more than just the market leader, it * | |
* is the industry's de facto standard. * | |
* * | |
* Help yourself get started quickly while simultaneously helping * | |
* to support the FreeRTOS project by purchasing a FreeRTOS * | |
* tutorial book, reference manual, or both: * | |
* http://www.FreeRTOS.org/Documentation * | |
* * | |
*************************************************************************** | |
http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading | |
the FAQ page "My application does not run, what could be wrong?". Have you | |
defined configASSERT()? | |
http://www.FreeRTOS.org/support - In return for receiving this top quality | |
embedded software for free we request you assist our global community by | |
participating in the support forum. | |
http://www.FreeRTOS.org/training - Investing in training allows your team to | |
be as productive as possible as early as possible. Now you can receive | |
FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers | |
Ltd, and the world's leading authority on the world's leading RTOS. | |
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. | |
http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High | |
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 | |