Ezurio An008 User manual

Application Note AN008

Wireless Development Kit – User Guide

Overview

EZURiO’s Wireless Development Kit provides a platform for rapid prototyping of wireless

connectivity, providing options for the development of Bluetooth, 802.11 and GPRS

applications

1. Introduction

The EZURiO Wireless Development Kit is designed to support the rapid development of

applications and software for the EZURiO range of Bluetooth and Wireless LAN modules.

The development board will also allow you to develop applications and services for a

Siemens MC55 GPRS module when connected to an external power supply.

Package Contents

All kits contain the following items

Development

Board

The mother board is used to mount your chosen wireless module,

providing the RS232 interface and access to all the module

interface pins.

USB cable The USB cable can be used as one of the options to provide power

for the dev kit via the onboard connector.

Serial cable RS232 interface cable to provide the communication between your

host pc and your choice of wireless module. The serial cable can

also be used as an option to power the motherboard and module

from pin 9.

Bluetooth USB

adapter

Versions of the Development Kit which include a Bluetooth module

include a FREE USB Bluetooth adaptor and Windows protocols

stack.

Three Mounting

Spacers

Mounting spacers for securing your choice of Bluetooth or Wireless

LAN module to the motherboard

EZURiO terminal

application

PC based terminal emulation software, specifically designed to help

the development and diagnostics of applications on the EZURiO

range of modules

Documentation A development kit user guide, board design circuit diagrams and a

quick start guide

2. Wireless Module Development Board

The development board allows the EZURiO Bluetooth or Wireless LAN Module to be

connected to a PC. The development board provides RS-232 level conversion through a

standard 9 way D type connector to all pins of the 40 way and a 50 way Hirose

connecters used by Bluetooth or Wireless LAN modules.

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A separate connector is provided for PCM audio for use with the 40 way EZURiO

Bluetooth modules. This can be connected to a customer’s own evaluation board or a

range of codec accessory boards that EZURiO will make available.

3. Getting to know the Development Board

40 way connecto

50 way connecto

9 way DEE

RS-232 Level Shifte

PSU Options:

USB

2.1mm

Jack

Screws

Reset Switch

PCM Output

4. Power Supply

Minimum Typical Maximum

Input Voltage 3.6V 5V 6V

The development board provides a number of options to provide power to the module.

•5V Power from a USB port

•Power from an external power supply via screw terminals

•Power from a external mains power block via a 2.1mm DC connector

•Power via Pin 9 of the RS232 adaptor

The developer kit includes a USB cable to provide power to the development board. This should be

plugged into a PC USB port, a USB hub, or a mains adaptor with a USB output. If a hub is used, it

should be a powered USB hub to ensure that sufficient current is available at the port being used.

Both the Bluetooth Intelligent Serial Module (BISMII) and the Wireless LAN (WISM) modules can be

driven by the current available at a USB port.

When using a Siemens MC55 GPRS modem in the development board, an external power supply

with a minimum current capacity of 2A MUST be used and connected to the power supply

terminals.

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Jumper JP2 is used to select an external power source on the screw terminals.

SW1 (slide switch) provides the power on / off for the module but does not isolate the

power from other components of the development board.

S1 (push button TACT switch) provides a reset signal to both the 40 way and 50 way

connectors. Note that the reset polarity is different for the 40 and 50 way pinouts. This

is accomplished by circuitry on the development board, providing an active HIGH reset

for the 40 way connector and an active LOW for the 50 way connector. Users connecting

a reset signal to the test points one the board, should be aware that there is a 10kΩ

pulldown on the 40 way reset pin, and a open collector transistor connected to the 50

way reset pin. Refer to the schematics on the CD.

An alternative method of powering the development kit is to supply power to Pin 9 of the RS232

connector. If this method is used, no other power supplies should be connected to the board.

Jumper 8 on the development board needs to be moved to allow power to be derived from pin 9 of

the serial port. In this mode the ring indicator will not be available from the RS232 interface.

5. RS-232 Serial Interface

This provides a direct interface to any standard RS-232 port on a PC or peripheral. The 9

way D type connector can be plugged straight into a serial port on a PC or peripheral. If

access to the serial port is restricted, the serial cable provided can be used to connect

the development board to the PC.

The development board contains a level shifter on the RX, TX, CTS, RTS, DTR, DSR, RI

and DCD signals that converts between the 3.3V levels required on the module to the

standard RS-232 levels.

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The level shifter can have its outputs permanently enabled, or enabled only when the

module is active, i.e. not in sleep mode. The latter is useful when a defined state is

required at the RS232 interface as the module enters and exits its low power modes.

The behaviour is determined by the setting of J10, which is located behind the USB

socket at the rear of the board. The normal setting is Always Enabled.

Note that the 50 pin formats of the WISM and the Siemens MC55 do not support the

output line to drive this input. When using modules on the 50 pin connector J10 must

be set to Always Enabled.

J10 Settin

If digital signal levels are required at the RS232 connector, these can be achieved by

removing the level shifter and populating the PCB pads that are then exposed with zero

ohm links.

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6. Software

The development board will connect any EZURiO Bluetooth or Wireless LAN Module to the

serial port of a PC or other device. From a PC you can communicate with the module

using any Terminal Emulator software such as HyperTerminal, Procomm or the EZURiO

Terminal application supplied.

EZURiO Terminal is a terminal emulation application capable of running on Windows 98,

Me, 2000 and XP operating systems. It was developed specifically to aid development

and testing of EZURiO Modules. It allows connection to serial devices using any

combination of the following communications parameters:

COM Port: 1 to 255

Baud rate: 300 to 921600

Parity: None, Odd, Even

Data Bits: 7 or 8

Stop Bits: 1 or 2

Handshaking: None or CTS/RTS

The benefits of using EZURiO Terminal are:

•Status of DSR, CTS, DCD and RI are continuously displayed

•DTR on the host PC can be directly controlled via a check box

•RTS can be directly controlled

•BREAK signals can be sent

•Scripts can be run to assist

•Additional built-in features speed development

EZURiO includes a “Data Transfer Test” mode allowing data to be sent as fast as the

handshaking will permit. This feature is useful for testing the bit transfer rate of a

Bluetooth connection.

The EZURiO terminal application is provided on the CD within this kit; updates are also

available from our website: www.EZURiO.com

7. Interface Specification

7.1 Serial port connector

The pin-out for the 9 way D type connector is shown in the table below.

Note: The direction is as seen from the Module’s perspective.

Pin Description Signal Direction

1 Data Carrier Detect DCD Output

2 Transmit Data TD Output

3 Receive Data RD Input

4 Data Set Ready DSR Input

5 Ground GND ---

6 Data Terminal Ready DTR Output

7 Clear To Send CTS Input

8 Request To Send RTS Output

9 Board Power or Ring Indicator RI or Power Output

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7.2 Module Breakout connectors

All of the pins from the 40 way and 50 way connectors, WITH THE EXCEPTION OF Vcc

are available on each of two rows of plated through holes on the long sides of the board.

These translate directly to the pin layout of the module receptacles, allowing access to all

of the module pins. Pin 1 is indicated by an ident on the silk screen.

The format of the holes allows the fitting of your choice of connectors, or they can be

used for directly soldering test wires to the board. Both are laid out on a standard 0.1”

(2.54mm) pitch.

7.3 PCM Interface

The Development board provides a dedicated audio interface for the Bluetooth modules. The pins

provide the developer with access to the module’s PCM lines as well as providing power to allow

additional audio hardware to be developed. EZURiO has developed a range of audio codec

interface boards that can be plugged directly onto this interface to support audio application

development.

7.4 Board configuration jumpers

Jumper Description

JP1 Breaks the supply to the module for current measurements

JP2 Selects external power supply for Siemens modules

JP8 Selects pin 9 power

J10 Selects low power mode for RS-232 level shifter

8. Other Features

8.1 Power Consumption Measurement

A removable jumper JP1 is provided to break the supply line directly to the modules, allowing the

current consumption to be measured. For normal operation JP1 must be fitted.

Note that this only measures the current consumption of the module, and not of the level shifter or

other peripheral circuitry.

8.1 USB Access

USB access can be provided to allow a direct USB connection to a Bluetooth HCI module. To do

this remove resistors R17 and R18 from the development kit and replace them with zero Ohm

links.

Note that if this is done and the unit is then connected to a USB host port, it will be powered from

that same port. Do not attempt to use any other power source for the development kit when

operating in this mode.

This is not relevant for modules with a UART interface.

9. Warranty

EZURiO warrants that its products shall conform to EZURiO’s published specifications and

remain free from defects in materials and workmanship under normal, proper and

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intended use for a period of two (2) years from date of purchase, provided that proof of

purchase be furnished with any returned equipment.

If during the warranty period any component part of the equipment becomes defective

by reason of material or workmanship, and EZURiO is immediately notified of such

defect, EZURiO shall at its option supply a replacement part or request return of

equipment, freight prepaid, to its designated facility for repair. In the event no trouble is

found on products returned for repair, EZURiO reserves the right to charge the customer

its standard published repair charge.

This warranty shall not apply to any products that have been subject to misuse, bending,

twisting, neglect, alteration, improper installation, testing or unauthorized repair

performed by anyone other than an EZURiO designated repair facility. Any non-warranty

repairs or maintenance shall be at EZURiO’s standard rates in effect at the time.

This warranty is in lieu of all other warranties, whether expressed, implied, or statutory,

including but not limited to, implied warranties or merchantability and fitness for a

particular purpose. In no event shall EZURiO be liable, whether in contract, in part, or on

any other basis, for any damage sustained by its customers or any other person arising

from or related to loss of use, failure or interruption in the operation of any products, or

delay in maintenance, or for incidental, consequential, in direct, or special damages or

liabilities, or for loss of revenue, loss of business, or other financial loss arising out of or

in connection with the sale, lease, maintenance, use, performance, failure, or

interruption of these products.

EZURiO Ltd

Saturn House, Mercury Park

Wycombe Lane, Wooburn Green, HP10 0HH

United Kingdom

Tel: +44 1628 858 940

Fax: +44 1628 528 382

The information contained in this document is subject to change without notice. EZURiO Ltd makes no warranty of any kind with regard to this material including, but not limited

to, the implied warranties of merchant ability and fitness for a particular purpose. EZURiO Ltd shall not be liable for errors contained herein or for incidental or consequential