NXP Semiconductors Freescale TWR-WIFI-GS1500M User manual

Freescale Semiconductor Inc.
TWRWIFIGS1500MLAB
TWR-WIFI-GS1500M
Lab Guide
Rev. 1

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Contents
1Purpose .......................................................................................................................................................3
2Configure Hardware ...............................................................................................................................4
3Configure Software .................................................................................................................................6
4Running the Demos.................................................................................................................................7
5Troubleshooting ................................................................................................................................... 11
6Next Steps................................................................................................................................................ 11
Revision History
Revision
Date
Changes
1.0
Sept 2012
Initial Release

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1Purpose
This document covers how to demonstrate applications using the TWR-WIFI-GS1500M Tower
peripheral module. The TWR-K60N512 Tower MCU module is used to communicate with the TWR-
WIFI-GS1500M. This document also covers how to configure the Tower System and an iPhone to run
the demos.
The demo software provides reference example for the MCU serial driver and application software.
The demo software uses AT commands to showcase advanced features of the TWR-GS1500M Serial to
Wi-Fi firmware such as Limited AP mode, embedded DHCP, multicast NDS/Service Discovery (used by
Bonjour), embedded Web Server for accessing embedded web pages, XML parser, security, and
UDP/TCP/IP/HTTP(s) protocols.
The MCU code is architected to have small memory footprint, and be mostly platform independent
with only the driver being MCU specific as shown in the diagram below. This allows for user to easily
port to other host microcontrollers. The reference MCU code is developed using IAR Embedded
Workbench IDE. The memory footprint for the reference demo is around 2K bytes of RAM and 12K
bytes of FLASH. This code includes library of all the AT commands supported by the TWR-GS1500M
device, but most applications do not use all the AT commands so memory footprint will vary based on
the application.

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2Configure Hardware
To run the demos with the TWR-K60N512 hardware, and software projects, make certain that the
jumpers and switches on the TWR-WIFI-GS1500M are in their default locations as shown below.
Figure 1. TWR-WIFI-GS1500M Default Jumper Settings

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Table 1. TWR-WIFI-GS1500M Default Jumper and Switch Settings
Jumper
Option
Setting
Description
SW1
Power Supply
Input
ELEV PWR
Power from Tower System 3.3V
DC PWR
Power from DC power jack (J2)
SW6
Mode Selection
RUN
GS1500M in standard "run" mode
PRGM
GS1500M in program mode
J1
Interrupt
Selection
1-2
Connect GS1500M interrupt to Tower IRQ_G (B56)
3-4
Connect GS1500M interrupt to Tower IRQ_E (B58)
5-6
Connect GS1500M interrupt to Tower IRQ_C (B60)
7-8
Connect GS1500M interrupt to Tower IRQ_A (B62)
J3
SPI/UART
Selection
1-2
Select SPI as serial interface
2-3
Select UART as serial interface
J4
GS1500M Reset
Selection
1-2
Connect GS1500M Reset to Tower GPIO9 (A9)
2-3
No connection
J5
1-2
Connect GS1500M Reset to Tower RSTOUT (A63)
2-3
Connect GS1500M Reset to Tower GPIO1 (B21)
J7
Slave SPI Port CS
Selection
1-2
Connect Tower SPI0_CS0 to slave SPI CS on GS1500M
2-3
Connect Tower SPI0_CS1 to slave SPI CS on GS1500M
J8
UART Routing
Selection
1-2
Connect GS1500M UART0 to on-board RS232/DB9
2-3
Connect GS1500M UART0 to Tower System
J9
Master SPI Port
CS Selection
1-2
Connect Tower SPI1_CS1 to master SPI CS on GS1500M
2-3
Connect Tower SPI1_CS0 to master SPI CS on GS1500M
J11
Power Isolation
and Current
Measurement
ON
Connect GS1500M power supplies to the 3.3V supply
source
OFF
Isolate GS1500M from power supplies. J11 can be used to
measure the energy consumption of the VBAT, VDDIO,
and EN_1V8 supplies to the GS1500M.
J14
RS232
Transceiver
Force-off
ON
RS232 transceiver operates in normal mode
OFF
RS232 transceiver forced off
J15
UART CTS
Isolation
ON
Connect UART0_CTS from GS1500M to RS232 transceiver
OFF
Disconnect UART0_CTS from RS232 transceiver
Note: J3 jumper is not applicable when running Serial-to-Wi-Fi firmware. The firmware version loaded
on the module determines the interface used. This jumper is relevant if using IP2WIFI.
The TWR-K60N512 should be set to its default settings as described in the TWR-K60N512 Quick Start
Guide and User’s Manuals.
Assemble your Tower system consisting of the TWR-K60N512 and TWR-WIFI-GS1500M. Be careful to
match the Primary edge of each module to the Primary (or Functional on older systems) TWR-ELEV
module. Connect a USB cable between your development PC and the TWR-K60N512 PWR/OSBDM USB
connector.
A wireless access point will be required. Setup the wireless access point as desired and take note of
the SSID and any security setting (if enabled). Ensure that your development PC can connect to the
wireless access point.

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3Configure Software
This demo/lab walk-through guide uses the software listed below. Visit the links provided below to
download and install the software if you do not already have it installed.
1. IAR for ARM –http://www.iar.com/en/Products/IAR-Embedded-Workbench
2. TWR-WIFI-GS1500M Demonstration Software for TWR-WIFI-GS1500M and TWR-K60N512 -
http://www.freescale.com/TWR-WIFI-GS1500M

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4Running the Demos
This reference code shows the following two demo’s that use Limited AP mode:
1) Embedded web server demo
2) Smart Phone Demo with service discovery (Bonjour)
Below are steps to run the demos (web server and iOS) on the TWR-K60N512 with the TWR-WIFI-
GS1500M:
STEP 1:
a) Download the TWR-WIFI-GS1500M Demonstration Software and unzip.
b) Start the IAR Embedded Workbench and open the workspace GSK60.eww.
c) Rebuild the project (“Make” button) and download to the demo target (“Download and Debug”
button). Run the demo by pressing the “Go” button, pressing the F5 key or recycling the power
to the Tower System.
NOTE 1: When downloading code via OSBDM/OSJTAG, a request may be made to update firmware
and to set the OSBDM/OSJTAG in boot loader mode (J10), follow the on-screen instructions to
perform the upgrade.
NOTE 2: The firmware loaded on the TWR-WIFI-GS1500M currently supports the UART interface
and the demo code on the TWR-K60N512 uses UART interface.

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STEP 2: Web –Server Demo
Power on the Tower board and the TWR-WIFI-GS1500M device acts as an AP, generates its
own Wi-Fi network and runs the embedded web Server Application. The Wi-Fi network SSID
will be FS_APxxxxxx, where xxxxxx is last 6 digits of your board MAC address. Connect your PC
or Tablet or HandHeld device Wi-Fi client to this AP (FS_APxxxxxx) network.
STEP 3:
After the PC is connected to the AP, open a PC browser and enter URL: 192.168.240.1/fsl.html.
The browser will display the demo server webpage. Click Switch button to toggle the 4 LEDs
ON/OFF on the TWR-K60N512 board.
Rotate the demo tower to see the accelerometer x, y, z change with the movement. Adjusting
the potentiometer on the TWR-K60N512 board will control the Light value on the webserver.
Note: Temperature is not supported at this time so the displayed value will not change.

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STEP 4: Smart Phone Demo
Users may run the sensor demo using an iOS device (iPhone, iTouch or iPad) and see embedded
discovery (bonjour) functionality of the TWR-WIFI-GS1500M module. Go to Apple iTUNES store
and download and install the free GainSpan-Freescale Wi-Fi Sensor Application, if necessary.
STEP 5:
On the iOS device, enable Wi-Fi and connect to the SSID (FS_APxxxxxx) presented by the TWR
board as described in Step 1. Once connected, launch the smartphone application. The
application uses bonjour or mDNS or Service Discovery to identify the TWR system (freescale1).
Select the freescale1 device. This will launch the application and it will display the sensor
information as shown in Step 6.
Note: If for some reason discovery fails or is not supported by the handheld or tablet,
application will request user to manually enter the IP address. Enter IP address of
192.168.240.1

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STEP 6:
Toggle the LED ON/OFF button to change the 4 LED’s status on the TWR-K60N512 board. Select
the accelerometer sensor and rotate the tower to see the picture and accelerometer x, y, z
change with the movement of the board.
Adjust the potentiometer on the TWR-K60N512 board to control the light intensity on the
smartphone.
ON ON