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/*********************************************************************
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*
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* External serial data EEPROM Access Defs.
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*
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*********************************************************************
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* FileName: XEEPROM.h
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* Dependencies: None
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* Processor: PIC18, PIC24F, PIC24H, dsPIC30F, dsPIC33F
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* Complier: Microchip C18 v3.02 or higher
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* Microchip C30 v2.01 or higher
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* Company: Microchip Technology, Inc.
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*
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* Software License Agreement
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*
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* Copyright © 2002-2007 Microchip Technology Inc. All rights
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* reserved.
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*
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* Microchip licenses to you the right to use, modify, copy, and
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* distribute:
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* (i) the Software when embedded on a Microchip microcontroller or
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* digital signal controller product (“Device”) which is
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* integrated into Licensee’s product; or
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* (ii) ONLY the Software driver source files ENC28J60.c and
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* ENC28J60.h ported to a non-Microchip device used in
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* conjunction with a Microchip ethernet controller for the
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* sole purpose of interfacing with the ethernet controller.
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*
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* You should refer to the license agreement accompanying this
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* Software for additional information regarding your rights and
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* obligations.
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*
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* THE SOFTWARE AND DOCUMENTATION ARE PROVIDED “AS IS” WITHOUT
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* WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT
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* LIMITATION, ANY WARRANTY OF MERCHANTABILITY, FITNESS FOR A
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* PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* MICROCHIP BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, COST OF
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* PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
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* BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE
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* THEREOF), ANY CLAIMS FOR INDEMNITY OR CONTRIBUTION, OR OTHER
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* SIMILAR COSTS, WHETHER ASSERTED ON THE BASIS OF CONTRACT, TORT
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* (INCLUDING NEGLIGENCE), BREACH OF WARRANTY, OR OTHERWISE.
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*
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*
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* Author Date Comment
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*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* Nilesh Rajbharti 5/20/02 Original (Rev. 1.0)
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********************************************************************/
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#ifndef __XEEPROM_H
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#define __XEEPROM_H
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typedef unsigned short int XEE_ADDR;
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typedef BOOL XEE_RESULT;
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#define XEE_SUCCESS FALSE
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/*********************************************************************
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* Function: void XEEInit(void)
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*
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* PreCondition: None
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*
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* Input: baud - SSPADD value for bit rate.
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*
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* Output: None
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*
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* Side Effects: None
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*
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* Overview: Initialize I2C module to communicate to serial
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* EEPROM.
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*
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* Note: None
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********************************************************************/
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void XEEInit(void);
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/*********************************************************************
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* Function: XEE_RESULT XEEBeginWrite(XEE_ADDR address)
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*
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* PreCondition: XEEInit() is already called.
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*
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* Input: control - data EEPROM control code
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* address - address to where to write
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*
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* Output: XEE_SUCCESS if successful
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* other value if failed.
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*
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* Side Effects: None
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*
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* Overview: Sets up internal address counter of EEPROM.
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*
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* Note: This function does not release the I2C bus.
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* User must close XEEEndWrite() after this function
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* is called to relase the I2C bus.
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********************************************************************/
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XEE_RESULT XEEBeginWrite(XEE_ADDR address);
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/*********************************************************************
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* Function: XEE_RESULT XEEWrite(unsigned char val)
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*
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* PreCondition: XEEInit() && XEEBeginWrite() are already called.
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*
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* Input: val to be written
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*
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* Output: XEE_SUCCESS if successful
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* other value if failed.
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*
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* Side Effects: None
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*
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* Overview: Writes given value 'val' at current address.
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* Current address is set by XEEBeginWrite()
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* and is incremented by every XEEWrite().
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*
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* Note: This function does not initiate the write cycle;
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* it simply loads given value into internal page buffer.
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* This function does not release the I2C bus.
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* User must close XEEEndWrite() after this function
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* is called to relase the I2C bus.
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********************************************************************/
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XEE_RESULT XEEWrite(unsigned char val);
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/*********************************************************************
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* Function: XEE_RESULT XEEEndWrite(void)
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*
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* PreCondition: XEEInit() && XEEBeginWrite() are already called.
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*
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* Input: None
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*
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* Output: XEE_SUCCESS if successful
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* other value if failed.
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*
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* Side Effects: None
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*
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* Overview: Instructs EEPROM to begin write cycle.
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*
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* Note: Call this function after either page full of bytes
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* written or no more bytes are left to load.
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* This function initiates the write cycle.
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* User must call for XEEWait() to ensure that write
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* cycle is finished before calling any other
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* routine.
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********************************************************************/
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XEE_RESULT XEEEndWrite(void);
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/*********************************************************************
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* Function: XEE_RESULT XEEBeginRead(unsigned char control,
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* XEE_ADDR address)
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*
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* PreCondition: XEEInit() is already called.
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*
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* Input: control - EEPROM control and address code.
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* address - Address at which read is to be performed.
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*
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* Output: XEE_SUCCESS if successful
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* other value if failed.
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*
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* Side Effects: None
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*
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* Overview: Sets internal address counter to given address.
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* Puts EEPROM in sequential read mode.
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*
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* Note: This function does not release I2C bus.
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* User must call XEEEndRead() when read is not longer
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* needed; I2C bus will released after XEEEndRead()
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* is called.
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********************************************************************/
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XEE_RESULT XEEBeginRead(XEE_ADDR address);
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/*********************************************************************
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* Function: XEE_RESULT XEERead(void)
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*
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* PreCondition: XEEInit() && XEEBeginRead() are already called.
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*
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* Input: None
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*
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* Output: XEE_SUCCESS if successful
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* other value if failed.
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*
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* Side Effects: None
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*
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* Overview: Reads next byte from EEPROM; internal address
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* is incremented by one.
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*
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* Note: This function does not release I2C bus.
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* User must call XEEEndRead() when read is not longer
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* needed; I2C bus will released after XEEEndRead()
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* is called.
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********************************************************************/
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unsigned char XEERead(void);
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/*********************************************************************
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* Function: XEE_RESULT XEEEndRead(void)
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*
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* PreCondition: XEEInit() && XEEBeginRead() are already called.
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*
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* Input: None
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*
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* Output: XEE_SUCCESS if successful
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* other value if failed.
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*
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* Side Effects: None
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*
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* Overview: Ends sequential read cycle.
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*
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* Note: This function ends seuential cycle that was in
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* progress. It releases I2C bus.
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********************************************************************/
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XEE_RESULT XEEEndRead(void);
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/*********************************************************************
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* Function: XEE_RESULT XEEReadArray(unsigned char control,
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* XEE_ADDR address,
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* unsigned char *buffer,
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* unsigned char length)
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*
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* PreCondition: XEEInit() is already called.
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*
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* Input: control - EEPROM control and address code.
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* address - Address from where array is to be read
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* buffer - Caller supplied buffer to hold the data
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* length - Number of bytes to read.
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*
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* Output: XEE_SUCCESS if successful
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* other value if failed.
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*
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* Side Effects: None
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*
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* Overview: Reads desired number of bytes in sequential mode.
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* This function performs all necessary steps
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* and releases the bus when finished.
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*
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* Note: None
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********************************************************************/
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XEE_RESULT XEEReadArray(XEE_ADDR address,
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unsigned char *buffer,
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unsigned char length);
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/*********************************************************************
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* Function: BOOL XEEIsBusy(void)
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*
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* PreCondition: XEEInit() is already called.
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*
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* Input: None
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*
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* Output: FALSE if EEPROM is not busy
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* TRUE if EEPROM is busy or operation failed
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*
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* Side Effects: None
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*
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* Overview: Requests ACK from EEPROM or checks status register
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*
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* Note: None
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********************************************************************/
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BOOL XEEIsBusy(void);
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#endif
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