MCC iPort/AFM MIIC-203 User manual

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User’s Guide
RS-232 to I2C Host Adapter
with ASCII Fast Mode Interface
with iPort Utility Pack for Windows
www.mcc-us.com

Introduction
The MCC iPort/AFM (#MIIC-203) RS-232 to I2C Host
Adapter with ASCII Fast Mode Interface allows any PC,
Host Computer, or Data Terminal with an RS-232 port
to become an I2C Master or Slave device, transmitting
or receiving I2C messages to one or more I2C devices
across an I2C Bus.
This user’s guide describes the installation and
operation of the iPort/AFM (#MIIC-203) RS-232 to I2C
Host Adapter with ASCII Fast Mode Interface and iPort
Utility Pack Software for Windows.
MCC products are licensed to use the I²C Bus.
Purchase of Philips I²C components conveys a license under the Philips I²C patent to use the
components of the I²C system, provided the system conforms to the I²C specifications defined
by Philips.
I²C is a trademark of Philips Corporation.

Copyright© 2002 by Micro Computer Control Corporation. All rights
reserved. No part of this publication may be reproduced by any means
without the prior written permission of Micro Computer Control
Corporation, PO Box 275, Hopewell, New Jersey 08525 USA.
DISCLAIMER: Micro Computer Control Corporation makes no
representations or warranties with respect to the contents hereof and
specifically disclaims any implied warranties of merchantability or fitness
for any particular purpose. Further, Micro Computer Control Corporation
reserves the right to revise the product described in this publication and to
make changes from time to time in the content hereof without the
obligation to notify any person of such revisions or changes.
Life Support Applications
MCC Products are not designed for use in life support appliances, devices,
or systems where the malfunction of a MCC Product can reasonably be
expected to result in a personal injury.
WARNING: This equipment can radiate levels of radio frequency energy
that may cause interference to communications equipment. Operation of
this equipment may cause interference with radio, television, or other
communications equipment. The user is responsible for correcting such
interference at the expense of the user.
Printed in the United States of America

Table of Contents:
Part 1
RS-232 to I2C Host Adapter w/ASCII Fast Mode Interface
Overview .............................................................. 8
iPort/AFMAdapter................................................. 8
iPort Utility Pack Software ........................................... 8
Programmer’sReference ............................................ 8
Packing Slip ........................................................... 9
System Requirements ................................................... 9
Interconnects .......................................................... 9
DB-25 Serial Port Pinout ............................................ 10
DB-9 Serial Port Pinout ............................................. 10
+5VDCPowerJack ................................................ 10
I2C Interface Connector ............................................. 11
INT,iNterruptSignalControl ........................................ 11
Hardware Configuration ............................................... 12
Pull-upResistors .................................................. 12
Connecting to a 3.3v System ............................................. 12
Connecting to an SMBus System ......................................... 12
Hardware Set-Up ...................................................... 12
Part 2
iPort Utility Pack For Windows
Introduction to Utility Pack ............................................. 14
iPortMessageCenter............................................... 14
iPortMessageManager ............................................. 15
System Requirements .................................................. 16
Software Installation ................................................... 16
Introduction to Message Center .......................................... 17
I2CMessageOperations............................................. 18
Introduction to Message Manager ........................................ 21
I2CMessageOperations............................................. 22
BasicSet-up ................................................. 23
AdvancedSet-up ............................................. 24
Diagnostic Set-up ............................................. 25
Sending Messages ..................................................... 26

MasterOperations ................................................. 26
ToMasterTransmitData ....................................... 26
To Master Receive Data ........................................ 27
SlaveOperations .................................................. 28
ToSlaveTransmitamessage.................................... 28
To Slave Receive a message .................................... 28
Uninstalling iPort Utility Pack ........................................... 28
Part 3
Programmer’s Reference ASCII Command Interface Definitions
Quick Start ........................................................... 30
ASCII Command Interface Definitions .................................... 31
Synchronous Interface Events ........................................ 32
iPort/AFMReset ............................................. 32
StatusDisplay ............................................... 33
RS-232 Baud Rate ............................................ 33
Close I2CConnection ......................................... 34
Set Destination I2CSlaveAddress................................ 34
Echo/PromptControl ......................................... 34
FlowControl ................................................ 34
I2CGeneralCallControl ....................................... 35
HexOnlyDisplayControl ...................................... 35
Set iPort/AFM’s Own I2CSlaveAddress .......................... 36
I2CBusClockRateControl..................................... 36
CommandMenuDisplay ....................................... 36
iNterruptSignalControl/Status .................................. 37
Open I2CConnection .......................................... 37
MasterReadMessage.......................................... 38
SlaveTransmitMessage........................................ 39
MasterTransmitMessage ...................................... 40
Set I2CBustimeoUtinmsec ................................... 41
DisplayFirmwareVersion...................................... 41
eXtendedCommands .......................................... 41
Display Tx bYte Count ........................................ 44
Asynchronous Interface Events ....................................... 45
SlaveTransmitRequest ........................................ 45
Slave Receive Complete ........................................ 45
General Call Receive Complete .................................. 45
I2CBusTime-outDetected ..................................... 46

iNterruptSignalAssert......................................... 46
iNterruptSignalRelease ....................................... 46
iPort/AFMPrompts ................................................ 47
iPort/AFMReady............................................. 47
Slave Not Acknowledging ...................................... 47
iPort/AFMBusy ............................................. 47
I2CBusArbitrationLoss ....................................... 47
I2CBusErrorDetected ........................................ 47
I2CBusTime-outDetected ..................................... 47
iPort/AFMConnectionClosed................................... 48
InvalidCommandArgument .................................... 48
SlaveTransmitRequestNotActive .............................. 48
InvalidiPort/AFMCommand ................................... 48
iPort/AFM RS-232 Receive Buffer Overflow ...................... 48
Example Code ........................................................ 49
iPort/AFMReset .................................................. 49
iPort/AFM Initialization ............................................ 49
MasterTransmitMessage ........................................... 49
Master Receive Message ............................................ 49
CommunicationEventProcessing..................................... 49
iPort/AFM Revision Report ............................................. 53
Additional Information ................................................. 53
Software License Agreement ............................................ 54
Appendix A ........................................................... 56

8
Part 1
Model MIIC-203
RS-232 to I2C Host Adapter
w/ASCII Fast Mode Interface
Model MIIC-203

9
RS-232 to I2C Host Adapter
w/ASCII Fast Mode Interface
Overview
The MCC iPort/AFM (#MIIC-203) RS-232 to I2C Host Adapter with ASCII
Fast Mode Interface allows any PC, Host Computer, or Data Terminal with
an RS-232 port to become an I2C Master or Slave device, transmitting or
receiving I2C messages to one or more I2C devices across an I2C Bus.
PRODUCT FEATURES
Turn ANY Computer’s Serial Port into an I2C Port.
Supports Standard (100) and Fast (400) I2C Bus Activity.
High Performance Bus Co-Processor
Maximum Bus Throughput with Low Overhead.
19.2, 57.6, and 115.2 k selectable Baud Rates.
Supports Bus Master and Slave, Transmit and Receive, and INT Signaling .
Compatible with 3v to 5v I2C at up to 400kbit/s.
Compatible with iPort/AI applications.
The iPort/AFM system consists of the following components:
1) iPort/AFM Adapter
This adapter plugs into an RS-232 Port on a host computer and
generates I2C Bus signals.
2) iPort Utility Pack Software
This software package, included with each iPort, includes the iPort
Message Manager and Message Center applications to easily send and
receive I2C Bus messages.
3) Programmer’s Reference
This section includes ASCII command interface definitions and
example code to assist in developing a custom application for the
iPort/AFM adapter.

10
RS-232 Serial Port Connector
Packing Slip
This package includes the following items:
•iPort/AFM (#MIIC-203) RS-232 to I2C Host Adapter with ASCII Fast Mode
Interface.
•4 Foot I2C Interface Cable. (#CAB4)
•1Ft. /INT-Trigger Cable (#AXM-12G)
•Serial Port Cable, 9F/25M, 1 Foot Long. (#C9F25M1)
•1Ft. /INT-Trigger Cable (#AXM-12G)
•iPort/AFM User’s Guide.
•iPort Utility Pack for Windows Software.
•Power Supply
Standard 120VAC, 60Hz, USA Plug (#MWT-5VA)
European 220VAC, 50Hz, European Plug (#MWT-5VAE)
International 120/220/240VAC, 50-60Hz, Int.Plug selection (#MWT-5VAI)
System Requirements
a. Host computer
b. 1 free RS-232 Serial Port
Interconnects
The I2C Bus Host Adapter includes four interconnections:
1. RS-232 Serial Port Connector
This connector provides connection
to the serial port on the PC. Use the #C9F25M1 cable to adapt the iPort to
9-pin serial ports.

11
DB-25 Serial Port Pinout
DB-25 Pin 2, Transmit Data from the Host Computer to the iPort
DB-25 Pin 3, Receive Data from the iPort to the Host Computer.
DB-25 Pin 4, Request to Send from the Host Computer to iPort.
DB-25 Pin 5, Clear to Send from the iPort to the Host Computer.
DB-25 Pin 7, Ground between Host Computer and iPort
DB-9 Serial Port Pinout
DB-9 Pin 3, Transmit Data from the Host Computer to the iPort
DB-9 Pin 2, Receive Data from the iPort to the Host Computer.
DB-9 Pin 7, Request to Send from the Host Computer to iPort.
DB-9 Pin 8, Clear to Send from the iPort to the Host Computer.
DB-9 Pin 5, Ground between Host Computer and iPort
Transmit Data, Receive Data, and Ground are required in all cases.
Request to Send and Clear to Send are required if RTS/CTS communication
handshaking protocol is selected. See the iPort/AFM Flow Control
command.
Communication Handshaking Protocol
iPort/AFM implements either XON/XOFF (by default) or RTS/CTS flow
control protocols. Either protocol can be selected with the iPort/AFM Flow
Control command. Flow control is used by the iPort/AFM to limit character
flow to and from the Host computer to avoid overflowing internal
communication buffers and lost data.
Communication Parameters
19,200, 57.6k, or 115.2k Baud, No Parity, 8 Data Bits, 1 Stop Bit
The default baud rate is 19,200 until the iPort/AFM receives a Baud Change
command from the host computer.
2. +5VDC Power Jack
The iPort/AFM Host Adapter can be powered in one of two ways, from the
power jack, or from the I2C interface connector. If the unit is powered from
the provided +5VDC Wall Transformer, approximately 250ma of regulated
+5VDC is available at the I2C interface connector to power external devices.
If the iPort/AFM is powered from the I2C connector, the unit requires 50ma
of regulated +5VDC.