HID Hi-O iCLASS Installation Guide - Manual (Page 34)

iCLASS OEM75 Integration Guide, 3141-907, Rev. B.0
Page 34 of 49 January 2014
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6.8.4 Sample Source Code - I²C
Below is some sample code to help in implementing a Master I²C driver to talk to the OEM75.
/*======================================================================
** Copyright © 2008 HID Corporation. All rights reserved.
**
** This software is protected by copyright law and international treaties.
** Any unauthorized reproduction, distribution or use of the software
** is prohibited.
**======================================================================
***
** FILE NAME: masterI2C.h
** DESCRIPTION: This file contains the definitions used by the
** masterI²C.c file functions.
**
**======================================================================
**
**====================================================================*/
#ifndef ITG_MASTER_I2C_H
#define ITG_MASTER_I2C_H
#else
#error masterI2C.h is included multiple times.
#endif
//
// Slave device address
//
#define SLAVE_ADDR 0x02
#define I2C_MSG_BUFSIZE 200
#define I2C_ACK 0
#define I2C_NAK 1
#define NULL_MSG 0
/********** External function declarations (prototypes) **********/
/*
** These functions are defined in one module, but called in another.
** Functions that are local to a module are declared static
** and their prototypes appear only in that module.
*/
void InitI2C (void);
void WriteI2C(UBYTE *pData, UBYTE numBytes);
void ReadI2C(UBYTE *pData, UBYTE *pNumBytes);