ST STEVAL-PCC008V1 Manual de usuario

July 2010 Doc ID 17012 Rev 1 1/25

UM0897

User manual

Embedded Ethernet web client based on the STR91x

Introduction

This document describes the functioning of the STEVAL-PCC008V1 demonstration board

with an embedded Ethernet web client system which is based on ST's STR91xFAW

ARM966E-S™ 16/32-bit Flash MCU with Ethernet microcontroller. This system is designed

for viewing/monitoring jpeg images taken from an HTTP web server or from an IP camera

present on the network. The images are displayed on the TFT present on the board, thus

enabling surveillance. This system needs to be plugged into the network to access jpeg

images from the HTTP web server or from the IP camera. This system is compatible with

web servers which do not require support for secure socket layer (SSL) and it uses specific

programmed requests to capture images from specific web servers.

The system uses a 2.4" TFT for displaying the images captured from the network. The

captured jpeg images are displayed on the TFT by converting them into bitmap through a

jpeg decompression algorithm. A six-button keypad is provided for navigating through the

menus. The availability of the micro-SD card on the board helps in handling large quantities

of data from the network.

www.st.com

Contents UM0897

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Contents

1 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.1 Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.2 Hardware setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.2.1 Web client with local display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.2.2 Jumper settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.2.3 Hardware layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.3 Network setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.3.1 Setting up a local network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.3.2 Using an existing network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.4 HTTP web server setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.4.1 Using a "Techlogica" HTTP web server . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.4.2 IPCAM board setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2 System overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.1 Server client general description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2 System architecture description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2.1 STR9 microcontroller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.2.2 E-STE100P - single port fast Ethernet transceiver . . . . . . . . . . . . . . . . . 9

2.2.3 TFT: MB542B (AM-240320L8TNQW00H) . . . . . . . . . . . . . . . . . . . . . . . . 9

2.2.4 Power supply unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.2.5 User interface section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3 Running the system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.1 Powering up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4 Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5 Bill of material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

UM0897 List of figures

Doc ID 17012 Rev 1 3/25

List of figures

Figure 1. Web client with local display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Figure 2. Hardware layout (bottom and top views) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 3. Setting local network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 4. "Techlogica" HTTP web server interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 5. Server-client relationship . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 6. Web-client architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 7. User interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 8. Initial display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 9. TFT display 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 10. TFT display 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 11. TFT display 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 12. Microcontroller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 13. Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 14. Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 15. Power management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Getting started UM0897

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1 Getting started

1.1 Package

The embedded Ethernet web client based on the STR91x system package includes the

following items:

●Hardware content

– Demonstration board equipped with a TFT, micro-SD card, and keypad

●Firmware

– Already programmed in the system

– Object files of the firmware

– Pictures/images

– Set of images to work with the web server (as an example)

●Documentation:

– User manual (this document)

1.2 Hardware setup

1.2.1 Web client with local display

The board will display the images taken from the network.

To use this mode, jumper J19 present on the board should be in position 2-3. Please refer to

Ta bl e 1 .

Figure 1. Web client with local display

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1.2.2 Jumper settings

The jumper configurations are listed in the table below. Jumper JP19 is used to make the

system work either as "Web Client with local display" or as "Web Client with remote display".

1.2.3 Hardware layout

The system is built around STMicroelectronics' ARM® core-based STR912FAW44X6 in a

128-pin LQFP128 package. Figure 2 shows the layout of different sections of the board.

Figure 2. Hardware layout (bottom and top views)

Table 1. Jumper settings

Jumper Jumper position Function

JP19 2-3 Web client with local display

JP19 1-2 Not used

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Getting started UM0897

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1.3 Network setup

The system needs to be plugged into a network. The network can be accessed in either of

the following ways:

●Setting up a local network

●Using an existing network (provided it doesn't restrict external devices).

1.3.1 Setting up a local network

The configuration shown in Figure 3 is used to set up the network locally. The designed

system supports DHCP protocol which enables the hardware to obtain an IP address

automatically from the network. When a network is set up locally, a DHCP server needs to

be run on a machine connected to the network. Free DHCP servers can be downloaded

from the internet. The system doesn't work on a static IP address.

Figure 3. Setting local network

1.3.2 Using an existing network

When using an existing network, the system needs to be plugged into the network through

the DHCP port. Please check network settings to verify that the network allows connecting

such devices.

1.4 HTTP web server setup

1.4.1 Using a "Techlogica" HTTP web server

To test the functionality of the board, the user can use any web servers. For example, a

freeware "Techlogica" HTTP web server can be installed on a machine in the network. This

web server is freely available from the internet. After installing the server, the user needs to

load images in the web server directory. Some images are provided to the users for testing,

but users can use their own images. Before loading the images, verify the following items:

1. The user should store jpeg images in the web server directory. The demonstration unit

only supports a maximum of 30 images

2. The size of the image must be 320 x 240 pixels. If not, the image will not be displayed

on the TFT. The users can edit the image using any image editor and format to the

required size

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3. These images should be given names as advised below:

Name the images starting from 31.jpeg, 32.jpeg, …… 60.jpeg. In network mode, the

demonstration unit requests these images one by one. If the user wishes to add one file

(for example IMAGE.jpeg), first delete any file from the list (for example 40.jpeg), then

rename IMAGE.jpeg to 40.jpeg which allows the user to display that image on the TFT.

After the images are saved in the server folder, the server needs to be run in LAN

server mode through the interface provided by the server.

Figure 4. "Techlogica" HTTP web server interface

1.4.2 IPCAM board setup

To capture images from the IPCAM system, the user should set the static IP address to that

of the IP-CAM board.

System overview UM0897

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2 System overview

2.1 Server client general description

The system is based on the web server-client relationship as shown in Figure 5. The web

server system connects to the network by opening up a connection and listening on it. Any

web client system can connect to that port on which the server is listening. This web server

can be dedicated for any application. For example, it may be taking data from a camera or it

may have images already saved in it or also in industrial applications, process control

information can be available on the Ethernet network.This information can be taken by the

web client and displayed on the TFT display available on the board.

Figure 5. Server-client relationship

2.2 System architecture description

The system works as a web client on the STR9 microcontroller. The system can work with

web servers capable of providing jpeg images. The system accesses jpeg images from the

web server and displays them on the TFT for viewing/monitoring.

The system can request images from all web servers which don't provide support for secure

socket layer communication (SSL). These images are saved on a micro-SD card from where

they are decoded and displayed on the TFT through a jpeg decompression algorithm. The

system is capable of saving IP addresses of the web servers in non-volatile memory. The

user can change these addresses using the keypad.

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UM0897 System overview

Doc ID 17012 Rev 1 9/25

Figure 6. Web-client architecture

The individual parts of the system are described in the following sections.

2.2.1 STR9 microcontroller

The system is based on the STR912FAW44X6 microcontroller. The STR9 is a 16/32-bit

96 MHz ARM9E-based MCU having a RISC core, 5-stage pipeline, and tightly coupled

memories. The STR912FAW44X6 has 512 kbytes of main Flash and 96 kbytes of SRAM. It

has many communication interfaces. For more details refer to

http://www.st.com/mcu/inchtml-pages-str9.html.

Note: The STR9 has two SPI channels. In the demonstration board one SPI is allocated to U2,

where a ZigBee®module can be put, while another SPI is shared between the micro-SD

card and the TFT display.

2.2.2 E-STE100P - single port fast Ethernet transceiver

The E-STE100P, also referred to as the STEPHY1, is a high-performance fast Ethernet

physical layer interface for 10BASE-T and 100BASE-TX applications. It was designed with

advanced CMOS technology to provide a media independent interface (MII) for easy

attachment to 10/100 media access controllers (MAC) and a physical media interface for

100BASE-TX and 10BASE-T. For more details refer to

http://www.st.com/stonline/products/families/communication/wireline/ethernet/ethernet.htm.

2.2.3 TFT: MB542B (AM-240320L8TNQW00H)

The TFT module is based on the TFT from Ampire Co. The resolution of this TFT is QVGA

(320 x 240) resolution. It is diagonally 2.4" in size. The TFT has an amorphous,

transmissive, normally white display format. It has one backlight with 4 ultra-bright white

LEDs.

It has real 262 K color display and supports 5-6-5 and 6-6-6 RGB mode. We are using the

5-6-5 RGB mode means it takes 5, 6, 5 most significant bits for red, green and blue

respectively to form one pixel of data. The internal TFT controller is ILI9320. The TFT

internal RAM capacity is 172,800 bytes to display direct data. Please refer to the detailed

datasheet of the TFT for further details.

System overview UM0897

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2.2.4 Power supply unit

The onboard supply unit contains the low drop fixed positive voltage regulator

LD1117D33TR to generate 3.3 V and ultra-low drop voltage regulator LDS3985M18R to

generate 1.8 V. This 1.8 V supply is needed for the STR9 microcontroller.

2.2.5 User interface section

A set of 6 keys is provided for the user interface section in order to select the options on the

TFT.

Figure 7. User interface

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