Silicon Laboratories C8051F41 Series Manual de usuario

C8051F41x-DK

C8051F41XDEVELOPMENT KIT USER’SGUIDE

1. Kit Contents

The C8051F41x Development Kit contains the following items:

• C8051F410 Target Board

• C8051Fxxx Development Kit Quick-Start Guide

• Silicon Laboratories IDE and Product Information CD-ROM. CD content includes:

• Silicon Laboratories Integrated Development Environment (IDE)

• Keil 8051 Development Tools (macro assembler, linker, evaluation C compiler)

• Source code examples and register definition files

• Documentation

• C8051F41x Development Kit User’s Guide (this document)

• AC to DC Power Adapter

• USB Debug Adapter (USB to Debug Interface)

• USB Cable

2. Hardware Setup using a USB Debug Adapter

The target board is connected to a PC running the Silicon Laboratories IDE via the USB Debug Adapter as shown

in Figure 1.

1. Connect the USB Debug Adapter to the DEBUG connector on the target board with the 10-pin ribbon cable.

2. Connect one end of the USB cable to the USB connector on the USB Debug Adapter.

3. Connect the other end of the USB cable to a USB Port on the PC.

4. Connect the ac/dc power adapter to power jack P1 on the target board.

Notes:

•UsetheReset button in the IDE to reset the target when connected using a USB Debug Adapter.

• Remove power from the target board and the USB Debug Adapter before connecting or disconnecting the

ribbon cable from the target board. Connecting or disconnecting the cable when the devices have power can

damage the device and/or the USB Debug Adapter.

Figure 1. Hardware Setup using a USB Debug Adapter

USB

Cable

USB Debug Adapter

AC/DC

Adapter

Target Board

SILICON LABORATORIES

PWR

P1.6

P3.7RESET

Port 4Port 3Port 1

Port 2 Port 0

MCU

Silicon Laboratories

USB DEBUG ADAPTER

Run

StopPower

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3. Software Setup

The included CD-ROM contains the Silicon Laboratories Integrated Development Environment (IDE), Keil software

8051 tools and additional documentation. Insert the CD-ROM into your PC’s CD-ROM drive. An installer will

automatically launch, allowing you to install the IDE software or read documentation by clicking buttons on the

Installation Panel. If the installer does not automatically start when you insert the CD-ROM, run autorun.exe found

in the root directory of the CD-ROM. Refer to the readme.txt file on the CD-ROM for the latest information

regarding known IDE problems and restrictions.

4. Silicon Laboratories Integrated Development Environment

The Silicon Laboratories IDE integrates a source-code editor, source-level debugger and in-system Flash

programmer. The use of third-party compilers and assemblers is also supported. This development kit includes the

Keil Software A51 macro assembler, BL51 linker and evaluation version C51 C compiler. These tools can be used

from within the Silicon Laboratories IDE.

4.1. System Requirements

The Silicon Laboratories IDE requirements:

• Pentium-class host PC running Microsoft Windows 98SE or later.

• One available COM or USB port.

• 64 MB RAM and 40 MB free HD space recommended.

4.2. Assembler and Linker

A full-version Keil A51 macro assembler and BL51 banking linker are included with the development kit and are

installed during IDE installation. The complete assembler and linker reference manual can be found under the Help

menu in the IDE or in the “SiLabs\MCU\hlp” directory (A51.pdf).

4.3. Evaluation C51 C Compiler

An evaluation version of the Keil C51 C compiler is included with the development kit and is installed during IDE

installation. The evaluation version of the C51 compiler is the same as the full professional version except code

size is limited to 4 kB and the floating point library is not included. The C51 compiler reference manual can be

found under the Help menu in the IDE or in the “SiLabs\MCU\hlp” directory (C51.pdf).

4.4. Using the Keil Software 8051 Tools with the Silicon Laboratories IDE

To perform source-level debugging with the IDE, you must configure the Keil 8051 tools to generate an absolute

object file in the OMF-51 format with object extensions and debug records enabled. You may build the OMF-51

absolute object file by calling the Keil 8051 tools at the command line (e.g. batch file or make file) or by using the

project manager built into the IDE. The default configuration when using the Silicon Laboratories IDE project

manager enables object extension and debug record generation.

Refer to Applications Note

AN104 -

Integrating

Keil 8051 Tools Into the Silicon Labs IDE

in the “SiLabs\MCU\Documentation\Appnotes” directory on the CD-

ROM for additional information on using the Keil 8051 tools with the Silicon Laboratories IDE.

To build an absolute object file using the Silicon Laboratories IDE project manager, you must first create a project.

A project consists of a set of files, IDE configuration, debug views, and a target build configuration (list of files and

tool configurations used as input to the assembler, compiler, and linker when building an output object file).

The following sections illustrate the steps necessary to manually create a project with one or more source files,

build a program and download the program to the target in preparation for debugging. (The IDE will automatically

create a single-file project using the currently open and active source file if you select Build/Make Project before a

project is defined.)

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4.4.1. Creating a New Project

1. Select Project→New Project to open a new project and reset all configuration settings to default.

2. Select File→New File to open an editor window. Create your source file(s) and save the file(s) with a rec-

ognized extension, such as .c, .h, or .asm, to enable color syntax highlighting.

3. Right-click on “New Project” in the Project Window. Select Add files to project. Select files in the file

browser and click Open. Continue adding files until all project files have been added.

4. For each of the files in the

Project

Window

that you want assembled, compiled and linked into the target

build, right-click on the file name and select

Add file to build

. Each file will be assembled or compiled as

appropriate (based on file extension) and linked into the build of the absolute object file.

Note:

If a project contains a large number of files, the “Group” feature of the IDE can be used to organize.

Right-click on “New Project” in the

Project Window

. Select

Add Groups to project

. Add pre-defined

groups or add customized groups. Right-click on the group name and choose

Add file to group

. Select files

to be added. Continue adding files until all project files have been added.

4.4.2. Building and Downloading the Program for Debugging

1. Once all source files have been added to the target build, build the project by clicking on the Build/Make

Project button in the toolbar or selecting Project→Build/Make Project from the menu.

Note: After the project has been built the first time, the Build/Make Project command will only build the

files that have been changed since the previous build. To rebuild all files and project dependencies, click

on the Rebuild All button in the toolbar or select Project→Rebuild All from the menu.

Before connecting to the target device, several connection options may need to be set.

Open the

Connection Options

window by selecting

Options

→

Connection Options...

in the IDE menu. First, select

the appropriate adapter in the “Serial Adapter” section. Next, the correct “Debug Interface” must be selected.

C8051F41x

family devices use the Silicon Laboratories 2-wire (C2) debug interface. Once all the selections

are made, click the OK button to close the window.

3. Click the

Connect

button in the toolbar or select

Debug

→

Connect

from the menu to connect to the device.

4. Download the project to the target by clicking the Download Code button in the toolbar.

Note: To enable automatic downloading if the program build is successful select Enable automatic con-

nect/download after build in the Project→Target Build Configuration dialog. If errors occur during the

build process, the IDE will not attempt the download.

5. Save the project when finished with the debug session to preserve the current target build configuration,

editor settings and the location of all open debug views. To save the project, select Project→Save Project

As... from the menu. Create a new name for the project and click on Save.

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5. Example Source Code

Example source code and register definition files are provided in the “SiLabs\MCU\Examples\C8051F41x”

directory during IDE installation. These files may be used as a template for code development. Example

applications include a blinking LED example which configures the green LED on the target board to blink at a fixed

rate.

5.1. Register Definition Files

status bits. They are installed into the “SiLabs\MCU\Examples\C8051F41x” directory during IDE installation. The

also installed in the default search path used by the Keil Software 8051 tools. Therefore, when using the Keil 8051

tools included with the development kit (A51, C51), it is not necessary to copy a register definition file to each

project’s file directory.

5.2. Blinking LED Example

The example source files blink.asm and blinky.c show examples of several basic C8051F41x functions. These

include; disabling the watchdog timer (WDT), configuring the Port I/O crossbar, configuring a timer for an interrupt

routine, initializing the system clock, and configuring a GPIO port. When compiled/assembled and linked this

program flashes the green LED on the C8051F410 target board about five times a second using the interrupt

handler with a C8051F410 timer.

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6. Target Board

The C8051F41x Development Kit includes a target board with a C8051F410 device pre-installed for evaluation and

preliminary software development. Numerous input/output (I/O) connections are provided to facilitate prototyping

using the target board. Refer to Figure 2 for the locations of the various I/O connectors.

P1 Power connector (accepts input from 7 to 15 VDC unregulated power adapter)

J1 22-pin Expansion I/O connector

J3 Port I/O Configuration Jumper Block

J4 DEBUG connector for Debug Adapter interface

J5 DB-9 connector for UART0 RS232 interface

J6 Analog I/O terminal block

J7 Connector for IDAC0 voltage circuit

J8 USB Debug Adapter target board power connector

J9, J10 External crystal enable connectors

J11 Connector for IDAC1 voltage circuit

J12 Connector block for Thermistor circuitry

J13, J14 ADC external voltage reference connectors

Figure 2. C8051F410 Target Board

DEBUG

Prototype Area

J11

C8051

F410

P1.4 P1.5

RESET

P2.3

P2.1

J33

R21

J10

J19

R23

J26

J24

J23

J21

J32

J12

J17

J30

BH1

J15

J25

J15

J25

D12

J16

J1 J3

J27

J18

J29

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6.1. System Clock Sources

The C8051F410 device installed on the target board features a calibrated programmable internal oscillator which is

enabled as the system clock source on reset. After reset, the internal oscillator operates at a frequency of

191.4 kHz (±2%) by default but may be configured by software to operate at other frequencies. Therefore, in many

applications an external oscillator is not required. However, if you wish to operate the C8051F410 device at a

frequency not available with the internal oscillator, an external crystal may be used. Refer to the C8051F41x data

sheet for more information on configuring the system clock source.

The target board is designed to facilitate the installation of an external crystal. Remove shorting blocks at headers

J9 and J18 and install the crystal at the pads marked Y2. Install a 10 MΩresistor at R4 and install capacitors at

C44 and C43 using values appropriate for the crystal you select. Refer to the C8051F41x data sheet for more

information on the use of external oscillators. The target board also has a 32.768 kHz watch crystal installed to

provide a timebase for the smaRTClock. Jumper J26 may be used to short the XTAL3 and XTAL4 pins if internal

clock mode is desired.

6.2. Power Options

The C8051F41x Target Board has many power options. This allows the user to exercise the different operating

modes of the C8051F410. The board has 2 voltage regulators. A 3.3 V LDO and a 1.2–5.25 V variable regulator.

To use the 3.3 V regulator, pin 2–3 of J9 should be shorted and a jumper installed in J10.

To use the variable regulator, pin 1–2 of J19 should be shorted and an output voltage should be selected using J21.

After selecting the appropriate voltage, pin 1–2 of J21 should be shorted to enable the output of the variable

regulator. If the voltage "VAR" is selected, the potentiometer R23 should be adjusted until the desired voltage is

reached. The input to the variable regulator can be obtained from the unregulated 9 V supply or from the 5 V USB

VBUS supply available when using a USB debug adapter.

Note: Before enabling either voltage regulator, the user should check the 4 supply rail selection headers

(J29+J30, J17, J12, J31+32) to ensure the correct voltage is being routed to the correct power pin. An

incorrect jumper setting may permanently damage the board. Note that VDD cannot exceed 2.5 V and is

typically derived from the on-chip regulator. Do not connect the 5.25 or 3.3 V output directly to VDD.

The three power LEDs for VIO, VREG, and VDD indicate if the appropriate supply rail is connected to a power

supply. Check to make sure all supply rails (with exception of VREG if not using the on-chip regulator) are

powered.

For the VIO voltage rail, the user may choose from the 3 V regulator (+3 VD), the variable regulator, or the on-chip

regulator. The selections are marked on the target board silkscreen.

For the VREG on-chip voltage regulator input, the user may choose from the 3 V regulator (+3VD), the 5 V USB

VBUS source obtained from the USB debug adapter (5VEC3), or from the variable regulator (VREG). The

selections are marked on the target board silkscreen.

For VDD, the user may choose the output of the on-chip regulator (VDD_) or the output of the variable regulator

(VREG).

6.3. Switches and LEDs

Three switches are provided on the target board. Switch SW1 is connected to the RESET pin of the C8051F410.

Pressing SW1 puts the device into its hardware-reset state. Switch SW2 and SW3 are connected to the

C8051F410’s general purpose I/O (GPIO) pins through headers. Pressing SW2 or SW3 generates a logic low

signal on the port pin. Remove the shorting block from the jumper J5 to disconnect SW2 and/or SW3 from their

associated port pins. The port pin signals are also routed to pins on the J11 I/O connector. See Table 1 for the port

pins and headers corresponding to each switch.

Three LEDs are also provided on the target board. The red LED labeled PWR is used to indicate a power

connection to the target board. The green LEDs labeled with port pin names are connected to the C8051F410’s

GPIO pins through headers. Remove the shorting blocks from the headers to disconnect the LEDs from the port

pins. The port pin signals are also routed to pins on the J1 I/O connector. See Table 1 for the port pins and headers

corresponding to each LED.

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6.4. Expansion I/O Connector (J1)

The 24-pin Expansion I/O connector J11 provides access to all signal pins of the C8051F410 device. A small

through-hole prototyping area is also provided. All I/O signals routed to connector J1 are also routed to through-

hole connection points between J11 and the prototyping area (see Figure 2 on page 5). Each connection point is

labeled indicating the signal available at the connection point. See Table 2 for a list of pin descriptions for J1.

Table 1. Target Board I/O Descriptions

Description I/O Jumper

SW1 Reset none

SW2 P1.4 J5[3–4]

SW3 P1.5 J5[7–8]

Green LED D3 P2.1 J5[1–2]

Green LED D5 P2.3 J5[5–6]

Red LED D1 VREGIN J24

Red LED D2 VDD J23

Red LED D12 VIO J33

Table 2. J1 Pin Descriptions

Pin # Description Pin # Description

P0.0

13 P1.4

2 P0.1 14 P1.5

3 P0.2 15 P1.6

4 P0.3 16 P1.7

5 P0.4 17 P2.0

6 P0.5 18 P2.1

7 P0.6 19 P2.2

8 P0.7 20 P2.3

9P1.0 21

P2.4

10 P1.1 22 P2.5

11 P1.2 23 P2.6

12 P1.3 24 P2.7

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6.5. Target Board DEBUG Interface (J4)

The

DEBUG

connector (J4) provides access to the

DEBUG

(C2) pins of the C8051F410. It is used to connect the

Serial Adapter or the USB Debug Adapter to the target board for in-circuit debugging and Flash programming.

Table 3 shows the

DEBUG

pin definitions.

6.6. Serial Interface (J5)

A RS232 transceiver circuit and DB-9 (J5) connector are provided on the target board to facilitate serial

connections to UART0 of the C8051F410. The TX, RX, RTS and CTS signals of UART0 may be connected to the

DB-9 connector and transceiver by installing shorting blocks on header J3.

J27[1–2] - Install shorting block to connect UART0 TX (P0.4) to transceiver.

J27[3–4] - Install shorting block to connect UART0 RX (P0.5) to transceiver.

J27[5–6] - Install shorting block to connect UART0 RTS (P1.4) to transceiver.

J27[7–8] - Install shorting block to connect UART0 CTS (P1.5) to transceiver.

6.7. Analog I/O (J6)

Many of the C8051F410 target device’s port pins are connected to the J2 terminal block. Connections for VDDA,

AGND, ADC external voltage references, IDAC outputs and ADC inputs are available. Refer to Table 4 for the J6

terminal block connections.

Table 3. DEBUG Connector Pin Descriptions

Pin # Description

1 +3VD(+3.3VDC)

2, 3, 9 GND (Ground)

4C2D

5/RST(Reset)

6P3.0

7C2CK

8 Not Connected

10 USB Power

Table 4. J6 Terminal Block Pin Descriptions

Pin # Description

1 P0.0/IDAC0

2 P0.1/IDAC1

3VREFIN

4GND

5AIN0

6AIN1

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6.8. IDAC Connectors (J7, J11)

The C8051F410 target board also features two Current-to-Voltage 750 Ωload resistors that may be connected to

the 2-bit current-mode Digital-to-Analog Converters (IDACs) on port pins P1.0 and P1.1. Install a shorting block on

J13 to connect the IDAC0/P1.0 pin of the target device to a load resistor. Install a second shorting block on J14 to

connect the IDAC1/P1.1 pin of the target device to a load resistor. The IDAC signals are then routed to the J1 and

J13 and J14 connectors.

6.9. USB Debug Adapter Target Board Power Connector (J8)

The USB Debug Adapter includes a connection to provide power to the target board. This connection is routed

from J4[10] to J8[1]. Place a shorting block at header J8[2–3] to power the board directly from an ac/dc power

adapter. Place a shorting block at header J8[1-2] to power the board from the USB Debug Adapter. The second

option is not supported with either the EC1 or EC2 Serial Adapters.

6.10. smaRTClock (Real Time Clock)

The C8051F41x Target Board is designed for developing system using the on-chip smaRTClock. A 32 kHz watch

crystal is installed in Y1 and a battery holder (BH1) is installed for use as a backup power source. To connect the

battery to the VBAT input on the MCU, connect pin 1 and 2 of J30 and short J29. The variable voltage regulator

with potentiometer (R23) may also be used to generate the battery voltage and simulate a battery in its various

charge conditions. See the C8051F41x data sheet for more details about the smaRTClock.

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7. Schematics

Figure 3. C8051F410 Target Board Schematic (Page 1 of 3)

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