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61 lines
1.7 KiB
C
Executable File
61 lines
1.7 KiB
C
Executable File
/*! \file i2ceeprom.c \brief Interface for standard I2C EEPROM memories. */
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//*****************************************************************************
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//
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// File Name : 'i2ceeprom.c'
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// Title : Interface for standard I2C EEPROM memories
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// Author : Pascal Stang - Copyright (C) 2003
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// Created : 2003.04.23
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// Revised : 2003.04.23
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// Version : 0.1
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// Target MCU : Atmel AVR series
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// Editor Tabs : 4
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//
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// This code is distributed under the GNU Public License
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// which can be found at http://www.gnu.org/licenses/gpl.txt
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//
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//*****************************************************************************
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#include <avr/io.h>
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#include <avr/signal.h>
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#include <avr/interrupt.h>
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#include "i2c.h"
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#include "i2ceeprom.h"
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// Standard I2C bit rates are:
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// 100KHz for slow speed
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// 400KHz for high speed
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// functions
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void i2ceepromInit(void)
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{
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// although there is no code here
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// don't forget to initialize the I2C interface itself
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}
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u08 i2ceepromReadByte(u08 i2cAddr, u32 memAddr)
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{
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u08 packet[2];
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// prepare address
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packet[0] = (memAddr>>8);
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packet[1] = (memAddr&0x00FF);
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// send memory address we wish to access to the memory chip
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i2cMasterSendNI(i2cAddr, 2, packet);
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// retrieve the data at this memory address
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i2cMasterReceiveNI(i2cAddr, 1, packet);
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// return data
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return packet[0];
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}
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void i2ceepromWriteByte(u08 i2cAddr, u32 memAddr, u08 data)
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{
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u08 packet[3];
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// prepare address + data
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packet[0] = (memAddr>>8);
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packet[1] = (memAddr&0x00FF);
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packet[2] = data;
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// send memory address we wish to access to the memory chip
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// along with the data we wish to write
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i2cMasterSendNI(i2cAddr, 3, packet);
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}
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