ST ST7 Series Manual de usuario

ST7 FAMILY

USB LOW-SPEED

EVALUATION BOARD

GETTING STARTED

October 2002

DOC-USB LOW-SPEED Evaluation Board

USE IN LIFE SUPPORT DEVICES OR SYSTEMS MUST BE EXPRESSLY AUTHORIZED.

STMicroelectronics PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN

LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF

STMicroelectronics. As used herein:

1. Life support devices or systems are those

which (a) are intended for surgical implant into

the body, or (b) support or sustain life, and

whose failure to perform, when properly used in

accordance with instructions for use provided

with the product, can be reasonably expected

to result in significant injury to the user.

2. A critical component is any component of a life

support device or system whose failure to

perform can reasonably be expected to cause

the failure of the life support device or system,

or to affect its safety or effectiveness.

October 2002 1/12

Rev. 1.2

ST7 USB LOW-SPEED

MICROCONTROLLERS

USB LOW-SPEED EVALUATION BOARD

INTRODUCTION

The objective of this evaluation board is to provide you with a complete USB application

package using a Windows-based host software application and one of ST’s range of USB low-

speed microcontrollers acting as a peripheral device. The host software and the ST7 source

code provide an easily-understood example of how to exchange data using the HID class pro-

tocols. The firmware supplied on the ST7 devices is based on a USB core library that makes

the control of all the USB interface hardware transparent to the application developer. This

USB library, developed by STMicroelectronics and plug-tested by the USB IF (Implementers

Forum), is intended for you to use as a toolbox. All the documentation you need to do this is

supplied with the package.

This evaluation board incorporates basic input sources such as push-buttons, an analog

trimmer and output sources (LEDs); It also has a wire-wrap area so that you can easily de-

velop your own application. An external 12V charge pump is also provided, to allow you to pro-

gram the ST7 embedded Flash program memory using In-Application Programming (IAP).

The following development tools can be ordered separately: assembler, linker, C compiler,

source level debugger, hardware emulator, programming boards and gang programmer. For

ordering information, see our website at http://www.stmcu.com or contact your local sales of-

fice.

2/12

Table of Contents

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1 GETTING STARTED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.1 SYSTEM REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.2 PACKAGE CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.3 SOFTWARE INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.4 HARDWARE INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.4.1 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.4.2 Jumper Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.4.3 Device Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2 RUNNING THE USB LOW SPEED EVALUATION BOARD . . . . . . . . . . . . . . . . . . . . 6

2.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.2 HID DEMONSTRATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2.1 USB ENUMERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2.2 COMMUNICATION WITH THE EVALUATION BOARD . . . . . . . . . . . . . . . 8

2.2.2.1 Controlling the evaluation board from a host PC . . . . . . . . . . . . . . 8

2.2.2.2 Displaying the evaluation board state . . . . . . . . . . . . . . . . . . . . . . 8

2.3 REMOTE WAKE UP FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.4 ADDING CIRCUITRY ON THE WIRE-WRAP AREA . . . . . . . . . . . . . . . . . . . . . . 9

2.5 PROPOSAL FOR SDIP42/DIP20 ADAPTOR . . . . . . . . . . . . . . . . . . . . . . . . . . 11

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ST7 USB Low-Speed Evaluation Board

1 GETTING STARTED

1.1 SYSTEM REQUIREMENTS

In order to use the USB evaluation board with the Windows operating system, a recent version

of Windows, such as Windows 98, Windows Millennium or Windows 2000 must be installed on

the PC.

The version of the Windows OS installed on your PC may be determined by clicking on the

“System”icon in the Control Panel.

IMPORTANT: When running the HID evaluation board applet provided in the package, verify

that the correct version of the HID.dll file is installed:

–Windows 98: HID.dll - Version 4.10.1998

–Windows 98 SE: HID.dll - Version 4.10.2222

–Windows Millennium: HID.dll - Version 4.90.300.1

–Windows 2000: HID.dll - Version 5.00.2134.1

–Windows XP: HID.dll - Version 5.1.2600.0

1.2 PACKAGE CONTENTS

The USB Evaluation Board package includes the following items:

■

Hardware content:

–Two ST72 Low-speed USB microcontroller devices:

–ST72F62 in SDIP42 package

–ST72F63B in SDIP32 package

Both devices are FLASH devices allowing up to 100 reprogramming cycles. They are deliv-

ered already programmed with the demonstration firmware.

–One evaluation board

■

Software content:

–PC executable software (C source joined as example) for demonstrating HID transfers.

–ST7 firmware (C source code) for the ST72F62

–ST7 firmware (C source code) for the ST72F63B

■

Documentation:

–USB library 4 x Interface documentation.

–ST7262 and ST7263B Datasheets

–Application Note AN1325

1.3 SOFTWARE INSTALLATION

Run USBDemonstrator.exe to install the PC HID demonstrator, and follow the on-screen

prompts to complete the installation.

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ST7 USB Low-Speed Evaluation Board

1.4 HARDWARE INSTALLATION

Figure 1 shows the location of the main components of the evaluation board. The schematic

drawing is given in Figure 6.

Figure 1. Evaluation Board Layout

1.4.1 Power Supply

The evaluation board is directly supplied by the USB Connector (Bus powered) and therefore

does not require any external supply. In case the components added on the wire-wrap area

sink more than 500mA, an external power supply must be used.

1.4.2 Jumper Settings

The W1 jumper selects the analog trimmer. When the jumper is removed, the analog trimmer

is disconnected from Ground in order to stop power consumption and to meet the power spec-

ifications of USB suspend state. If A/D conversion is needed for application development, you

can replace this jumper by a switch transistor controlled by an I/O pin.

SW4=Reset

USB Connector

Trimmer

SDIP32 Socket

SDIP42 Socket

& Supply

Jumper W1 Jumper W6 Jumper W7

5/12

ST7 USB Low-Speed Evaluation Board

Figure 2. Device selection for A/D conversion

If you are using the analog trimmer, select the installed ST7 device using jumper W6 as shown

in Figure 2. This ties the analog trimmer to the PA0 I/O port of the ST72F62 and to the PB0

port of the ST72F63B. Any other analog input pin on the microcontroller can be used by re-

moving the W6 jumper and wiring the center pin of W6 to the analog input.

The W7 jumper can be used to connect or disconnect an external 12V charge pump in case

you want to program the Flash.

1.4.3 Device Selection

■

Three devices can be used with this board:

–ST72F63B devices in SDIP32 package on the internal socket

–ST72F62 devices in SDIP42 package on the external socket

–ST72F61 devices in DIP20 by using a user-supplied SDIP42-DIP20 adaptor (Figure 7).

ST72F62 ST72F63B

W6 JUMPER

6/12

ST7 USB Low-Speed Evaluation Board

2 RUNNING THE USB LOW SPEED EVALUATION BOARD

2.1 INTRODUCTION

The USB Low-Speed Evaluation Board application consists of two main parts: a HID demon-

strator running on a PC and the evaluation board itself.

Communications between the PC and the ST7 board are done through different USB pipes:

–Control IN and OUT during enumeration with the bi-directional Endpoint 0.

–Interrupt IN from Endpoint 1 for data transferred from the ST7 to the PC.

–Interrupt OUT to Endpoint 2 for the data transferred from the PC to the ST7. Note that the

Windows98 HID driver does not support interrupt OUT transfers, and automatically uses

the control OUT pipe to Endpoint 0 instead (Set-Output function).

First connect the evaluation board to the PC with the USB cable. As a result, the evaluation

board is enumerated as an HID device as shown Figure 3, and is ready to use.

Figure 3. Enumeration result

When you start the HID demonstrator on the PC, a graphical interface is displayed (Figure 5)

for controlling the evaluation board. This PC software is used to demonstrate the enumeration

process and data transfer between the PC and the ST7 peripheral according to the USB HID

class specifications.

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ST7 USB Low-Speed Evaluation Board

2.2 HID DEMONSTRATOR

2.2.1 USB ENUMERATION

The Devices selection tabsheet, shown in Figure 4, displays the following information:

–Available USB HID devices: All the HID devices connected to the PC are displayed in this

window.

–Device information: This information, obtained during the enumeration phase, refers to the

highlighted device in the “Available USB HID Device”window: Vendor ID, Product ID and

Version numbers. (Refer to the USB Specification version 1.1 or higher). Additionally, as

string information is supported, the Manufacturer name, Product and Serial Number are

displayed.

Figure 4. HID Demonstrator window

–

HID attached Device

informationdevice

8/12

ST7 USB Low-Speed Evaluation Board

2.2.2 COMMUNICATION WITH THE EVALUATION BOARD

2.2.2.1 Controlling the evaluation board from a host PC

The HID demonstration tabsheet, shown in Figure 5, displays the following information:

Click on the ON/OFF button in the application dialog box to switch ON the LED LD2 on the

board. Click again to switch it OFF. The slider bar controls the brightness of a LED LD3

(ST72F62 or ST72F61) or LD1 (ST72F63B). Each slider bar value will be converted to a pulse

width modulation (PWM) signal by the microcontroller.

2.2.2.2 Displaying the evaluation board state

–Button State: This red LED changes its state when you press the SW1 push button on the

evaluation board.

–Trimmer Value: This value is the result of the Analog-to-Digital Conversion of the RV1 trim-

mer output. When you turn the trimmer on the evaluation board to a different position, the

new ADC value is transmitted via the USB bus and displayed on the progress bar of the

HID demonstrator.

Figure 5. HID Demonstrator window

2.3 REMOTE WAKE UP FUNCTION

The remote wake-up function is also supported by the evaluation board. By pressing SW3

(ST72F62 or ST72F61) or SW2 (ST72F63B) you can wake-up the PC from Stand-By mode.

Under Windows XP, the remote wake-up capability should be enabled. For that you should go

to the “Device Manager”then “Human Interface Device”and “HID-compliant device”. On the

tabsheet “Power Management”, select “Allow this device to bring the computer out of

standby”.

“LED Control”

Red LED

Slider Bar

Progress Bar

(LED brightness)

Button

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