Silicon Laboratories C8051F540DK User manual

C8051F540DK

C8051F540 DEVELOPMENT KIT USER’SGUIDE

1. Relevant Devices

The C8051F540 Development Kit is intended as a development platform for the microcontrollers in the C8051F54x

MCU family. The members of this MCU family are: C8051F540, C8051F541, C8051F542, C8051F543,

C8051F544, C8051F545, C8051F546, and C8051F547.

The target board included in this kit is provided with a pre-soldered C8051F540 MCU (QFN32 package) and a

C8051F542 (QFN24 package).

Code developed on the C8051F540 can be easily ported to the other members of this MCU family.

Refer to the C8051F54x data sheet for the differences between the members of this MCU family.

2. Kit Contents

The C8051F540 Development Kit contains the following items:

C8051F540 Target Board

C8051Fxxx Development Kit Quick-Start Guide

Silicon Laboratories IDE and Product Information CD-ROM. CD content includes the following:

Silicon Laboratories Integrated Development Environment (IDE)

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

Source code examples and register definition files

Documentation

C8051F540 Development Kit User’s Guide (this document)

Optional Third Party Tools CD

AC to DC Power Adapter

USB Debug Adapter (USB to Debug Interface)

Two USB Cables

3. Hardware Setup

Refer to Figure 1 for a diagram of the hardware configuration.

1. Connect the USB Debug Adapter to the DEBUG A 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. Verify that shorting blocks are installed on the target board as shown in Figure 4 on page 9.

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

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

Notes:

•UsetheReset icon in the IDE to reset the target when connected during a debug session.

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

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

damage the device and/or the USB Debug Adapter.

C8051F540DK

2 Rev. 0.1

Figure 1. Hardware Setup using a USB Debug Adapter

4. Software Installation

The included CD-ROM contains the Silicon Labs Integrated Development Environment (IDE), evaluation 8051

tools, optional software utilities, 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 ReleaseNotes.txt file on the CD-ROM for the

latest information regarding known problems and restrictions.

4.1. System Requirements

The following are the system requirements necessary to run the debug and programming tools:

Pentium-class host PC running Microsoft Windows 2000 or newer.

One available USB port.

4.2. Development Tools Installation

To install the IDE, utilities, and code examples, perform the following steps:

1. Click on the "Install Development Tools" button on the installation utility's startup screen.

2. In the Kit Selection box that appears, choose the C8051F540DK development kit from the list of options.

3. In the next screen, choose “Components to be Installed”. The programs necessary to download and debug on

the MCU are the Silicon Labs IDE and the Keil 8051 Evaluation Toolset. The CP210x Drivers are necessary

to use the UART capabilities of the target board. See Section 4.3. for more information about installing the

CP210x drivers.

4. Installers selected in Step 3 will execute in sequence, prompting the user as they install programs,

documentation, and drivers.

P1 P5

C8051F540-TB

P1.4_B

P1.4_A

Port 0 “A”

Port 2 “A”

Port 1 “A”

+LIN_V

LIN_OUT

GND

DEBUG_A

R22

SIDE “A”

SIDE “B”

DEBUG_B

TB3

RESET_A RESET_B

SILICON LABS

www.silabs.com

DS2

DS3

DS1

J13

J16

J17

J18

J10 J9

J12

Port 0 “B”

Port 1 “B”

F542

C8051

F540

J32 J7

Port 2 “B”

J11

J15

J8 J14

COMM

DS1

P1.3_A

PWR LED

P1.3_B

2102

LIN

USB

Cable

AC/DC

Adapter

Target Board

Silicon Laboratories

USB DEBUG ADAPTER

Run

Stop Power

USB Debug

Adapter

TB1

C8051F540DK

Rev. 0.1 3

4.3. CP210x USB to UART VCP Driver Installation

The C8051F540 Target Board includes a Silicon Laboratories CP2102 USB-to-UART Bridge Controller. Device

drivers for the CP2102 need to be installed before PC software such as HyperTerminal can communicate with the

target board over the USB connection. If the "Install CP210x Drivers" option is selected during installation, a driver

“unpacker” utility will launch.

1. Follow the steps to copy the driver files to the desired location. The default directory is C:\SiLabs\MCU\CP210x.

2. The final window will give an option to install the driver on the target system. Select the “Launch the CP210x VCP Driver

Installer” option if you are ready to install the driver.

3. If selected, the driver installer will now launch, providing an option to specify the driver installation location. After pressing

the “Install” button, the installer will search your system for copies of previously installed CP210x Virtual COM Port drivers. It

will let you know when your system is up to date. The driver files included in this installation have been certified by Microsoft.

4. If the “Launch the CP210x VCP Driver Installer” option was not selected in step 3, the installer can be found in the location

specified in step 2, by default C:\SiLabs\MCU\CP210x\Windows_2K_XP_S2K3_Vista. At this location, run

CP210xVCPInstaller.exe.

5. To complete the installation process, connect the included USB cable between the host computer and the USB connector

(P5) on the C8051F540 Target Board. Windows will automatically finish the driver installation. Information windows will pop

up from the taskbar to show the installation progress.

6. If needed, the driver files can be uninstalled by selecting “Silicon Laboratories CP210x USB to UART Bridge Driver

Removal” option in the “Add or Remove Programs” window.

5. Software Overview

The following software is necessary to build a project, download code to, and communicate with the target

microcontroller.

Silicon Labs Integrated Development Environment (IDE)

8051 Toolset

Other useful software that is provided on the development kit CD and the Silicon Labs Downloads

(www.silabs.com/mcudownloads) website includes the following:

Configuration Wizard 2

Keil µVision2 and µVision3 Drivers

MCU Production Programmer and Flash Programming Utilities

5.1. Silicon Labs IDE

The Silicon Labs IDE integrates a source-code editor, source-level debugger and in-system programmer. The use

of third-party compilers, assemblers, and linkers is also supported. This development kit includes evaluation

versions of commercial C compilers and assemblers which can be used from within the Silicon Labs IDE.

5.1.1. Third Party Toolsets

The Silicon Labs IDE has native support for many 8051 compilers. Natively-supported tools are as follows:

Keil

IAR

Raisonance

Tasking

Hi-Tech

SDCC

Specific instructions for integrating each of the supported tools can be found in the application notes section of the

CD, or on the Silicon Labs web site (http://www.silabs.com).

C8051F540DK

4 Rev. 0.1

5.1.2. Getting Started With the Silicon Labs IDE

The following sections discuss how to open an example project in the IDE, build the source code, and download it

to the target device.

5.1.2.1. Running the F540_Blinky example program

The F540_Blinky example program blinks an LED on the target board.

1. Open the Silicon Labs IDE from the Start menu.

2. Select ProjectOpen Project to open an existing project.

3. Browse to the C:\SiLabs\MCU\Examples\C8051F54x\Blinky directory (default) and select the

F540_Blinky_C.wsp project file and click Open.

4. Once the project is open, 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.

5. Before connecting to the target device, several connection options may need to be set. Open the Connec-

tion Options window by selecting OptionsConnection Options... in the IDE menu. First, select the

“USB Debug Adapter” option. Next, the correct “Debug Interface” must be selected. C8051F54x devices

use Silicon Labs “C2” 2-wire debug interface. Once all the selections are made, click the OK button to

close the window.

6. Click the Connect button in the toolbar or select DebugConnect from the menu to connect to the

device.

7. 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.

8. Click on the Go button (green circle) in the toolbar or by selecting DebugGo from the menu to start run-

ning the firmware. The LED on the target board will start blinking.

5.1.2.2. Creating a New Project

Use the following steps to create a new projects. Once steps 1-5 in this section are complete, continue at Step 3 in

Section 5.1.2.1.

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.

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.

C8051F540DK

Rev. 0.1 5

5.2. Configuration Wizard 2

The Configuration Wizard 2 is a code generation tool for all of the Silicon Laboratories devices. Code is generated

through the use of dialog boxes for each of the device's peripherals.

Figure 2. Configuration Wizard 2 Utility

The Configuration Wizard 2 utility helps accelerate development by automatically generating initialization source

code to configure and enable the on-chip resources needed by most design projects. In just a few steps, the wizard

creates complete startup code for a specific Silicon Laboratories MCU. The program is configurable to provide the

output in C or assembly. For more information, please refer to the Configuration Wizard 2 help available under the

Help menu in Configuration Wizard 2.

For more information, please refer to the Configuration Wizard 2 documentation. The documentation and software

are available from the Downloads webpage (www.silabs.com/mcudownloads).

5.3. Keil uVision2 and uVision3 Silicon Laboratories Drivers

As an alternative to the Silicon Laboratories IDE, the µVision debug driver allows the Keil µVision IDE to

communicate with Silicon Laboratories on-chip debug logic. In-system Flash memory programming integrated into

the driver allows for rapidly updating target code. The µVision IDE can be used to start and stop program

execution, set breakpoints, check variables, inspect and modify memory contents, and single-step through

programs running on the actual target hardware.

For more information, please refer to the uVision driver documentation. The documentation and software are

available from the Downloads webpage (www.silabs.com/mcudownloads).

C8051F540DK

6 Rev. 0.1

5.4. Programming Utilities

The Silicon Labs IDE is the primary tool for downloading firmware to the MCU during development. There are two

software programming tools that are intended for use during prototyping or in the field: The MCU Production

Programmer and the Flash Programming Utilities. The MCU Production Programmer is installed with the IDE to the

directory C:\Silabs\MCU\Utilities\Production Programmer\ (default). The Flash Programming Utilities can be

optionally installed from the CD and is installed to C:\Silabs\MCU\Utilities\FLASH Programming\ (default).

6. Example Source Code

Example source code and register definition files are provided in the “SiLabs\MCU\Examples\C8051F54x\”

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

each example file indicate which development tool chains were used when testing. Example applications include a

blinking LED example which configures the green LED on the target board to blink at a fixed rate. Also included are

examples for each of peripherals of the MCU, such as the UART.

6.1. Register Definition Files

addressable control/status bits. These files are installed into the

“SiLabs\MCU\Examples\C8051F54x\Header_Files\” directory during IDE installation. The register and bit names

are identical to those used in the C8051F54x data sheet.

6.2. Blinking LED Example

The example source files F540_Blinky.asm and F540_Blinky.c installed in the default directory

“SiLabs\MCU\Examples\C8051F54x\Blinky” show examples of several basic C8051F540 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 pin. When compiled/assembled and linked, this program

flashes the green LED on the C8051F540 Target Board about five times a second using the interrupt handler with

a C8051F540 timer.

C8051F540DK

Rev. 0.1 7

7. Target Board

The C8051F540 Development Kit includes a target board with a C8051F540 (Side A) and C8051F542 (Side B)

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 3 for the locations of the various I/O

connectors. Figure 4 on page 9 shows the factory default shorting block positions. A summary of the signal names

and headers is provided in Table 9 on page 15.

P4 Header to choose between +5V from Debug Adapter (P2) or +5V from on-board regulator (U4)

J18 Connect V_HIGH node from TB1 LIN header to +5V regulator input for board power

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

P5 USB connector (connects to PC for serial communication)

TB1 Shared LIN Connector for Side A and B MCUs for external nodes

J1-J3 Side A: Port 0 through Port 2 headers

J8 Side A: Connects +5V net to VIO and VREGIN of the MCU

J9, J10 Side A: External crystal enable connectors

J13 Side A: Connects decoupling capacitors C28 and C29 for MCU VREF (P0.0)

J15 Side A: Connects VIO to VIO_A_SRC which powers the R22 potentiometer, the RST_A

pin pull-up, and P1.4_A Switch pull-up.

J16 Side A: Connects P1.3_A LED and P1.4_A Switch to MCU port pins

J17 Side A: Connects MCU to two separate transceivers (UART(U3), and LIN(T2))

J20 Side A: Connects R27 potentiometer to port pin 1.2

P2 Side A: DEBUG connector for Debug Adapter interface

TB3 Side A: Power supply terminal block

J4 Side B: Connects +5V net to VIO and VREGIN of the MCU

J5-7 Side B: Port 0 through Port 2 headers

J11 Side B: Connects P1.3_B LED and P1.4_B Switch to MCU port pins

J12 Side B: Connects MCU to LIN transceiver (T1)

J19 Side B: Connects decoupling capacitors C41 and C42 for MCU VREF (P0.0)

P3 Side B: DEBUG connector for Debug Adapter interface

C8051F540DK

8 Rev. 0.1

Figure 3. C8051F540 Target Board with Pin Numbers

P1 P5

C8051F540-TB

P1.4_B

P1.4_A

Port 0 “A”

Port 2 “A”

Port 1 “A”

+LIN_V

LIN_OUT

GND

DEBUG_A

R22

SIDE “A”

SIDE “B”

DEBUG_B

TB3

RESET_A RESET_B

SILICON LABS

www.silabs.com

DS2

DS3

DS1

J13

J16

J17

J18

J10 J9

J12

Port 0 “B”

Port 1 “B”

F542

C8051

F540

J19

Port 2 “B”

J11

J15

J8 J14

COMM

DS1

P1.3_A

PWR LED

P1.3_B

2102

LIN

TB1

C8051F540DK

Rev. 0.1 9

7.1. Target Board Shorting Blocks: Factory Defaults

The C8051F540 Target Board comes from the factory with pre-installed shorting blocks on many headers. Figure 4

shows the positions of the factory default shorting blocks.

Figure 4. C8051F540 Target Board Shorting Blocks: Factory Defaults

P1 P5

C8051F540-TB

P1.4_B

P1.4_A

Port 0 “A”

Port 2 “A”

Port 1 “A”

+LIN_V

LIN_OUT

GND

DEBUG_A

R22

SIDE “A”

SIDE “B”

DEBUG_B

TB3

RESET_A RESET_B

SILICON LABS

www.silabs.com

DS2

DS3

DS1

J13

J16

J17

J18

J10 J9

J12

Port 0 “B”

Port 1 “B”

F542

C8051

F540

J19

Port 2 “B”

J11

J15

J8 J14

COMM

DS1

P1.3_A

PWR LED

P1.3_B

2102

LIN

TB1

C8051F540DK

10 Rev. 0.1

7.2. Target Board Power Options and Current Measurement (J4, J8, J24, P1, TB1)

The MCUs on the C8051F540 Target Board are powered from a +5 V net. The +5 V net is connected to the

headers J8 (Side A) and J4 (Side B). Shorting blocks can be put on each header to connect the +5 V net to the

VREGIN and VIO pins on the two MCUs. With the shorting blocks removed, a source meter can be used across

the headers to measure the current consumption of the MCU.

The +5 V net on the target board has three possible sources:

1. 12 V dc power using the ac to dc power adapter (P1)

2. 5 V dc USB VBUS power from PC via the USB Debug Adapter (DEBUG_A)

3. 12 V dc power from the LIN external header (TB1)

7.2.1. Using the AC to DC Power Adapter as the Target Board Power Source (P1, P4)

The default configuration of the target board uses the ac to dc power adapter as the source. The 12 V from the

adapter is regulated to +5 V using an LDO regulator (U4). The output of the regulator is connected to the +5 V net

of the target board through the P4 header. A shorting block should be installed on pins P4[2–3] for this purpose.

The +5 V net powers the MCUs.

7.2.2. Using the USB Debug Adapter as the Target Board Power Source (P4)

The target board can use +5 V provided by the USB Debug Adapter. To enable this source, a shorting block should

be installed on pins P4[1-2]. With this shorting block, the output of the LDO regulator (U4) is disconnected from the

+5 V net of the target board, and the SER_PWR node is connected to +5 V.

Note: The USB Debug Adapter does not provide the necessary peak power for the CAN transceivers to operate.

One of the 12 V dc sources is recommended for CAN transceiver operation.

7.2.3. Using an External +12V LIN Source as the Target Board Power Source (P4, TB1)

The two 12 V power sources (LIN and ac to dc power adapter) are ORed together using reverse-biased diodes (Z1

and Z2) and connected to the input of the LDO regulator (U6). The output of the regulator is connected to the +5 V

net of the target board through the P4 header. A shorting block should be installed on pins P4[2-3] for this purpose.

The +5 V net powers the MCUs directly.

7.3. System Clock Sources (J9, J10)

7.3.1. Internal Oscillators

The C8051F540 and C8051F542 devices installed on the target board feature a factory-calibrated, programmable

high-frequency internal oscillator (24 MHz base frequency, ±0.5%), which is enabled as the system clock source on

reset. After reset, the internal oscillator operates at a frequency of 187.5 kHz by default but may be configured by

software to operate at other frequencies. The on-chip crystal is accurate for LIN master communications and in

many applications an external oscillator is not required. However, if you wish to operate the C8051F540 device

(Side A) at a frequency not available with the internal oscillator, an external crystal may be used. Refer to the

C8051F54x data sheet for more information on configuring the system clock source.

7.3.2. External Oscillator Options

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

J9 and J10 and install the crystal at the pads marked Y1. Install a 10 Mresistor at R2 and install capacitors at C7

and C8 using values appropriate for the crystal you select. If you wish to operate the external oscillator in capacitor

or RC mode, options to install a capacitor or an RC network are also available on the target board. R2, R3, C7, and

C8 are located on the back side of the board, near the Side A MCU. Populate C7 for capacitor mode, and populate

R3 and C7 for RC mode. Refer to the C8051F54x data sheet for more information on the use of external

oscillators.

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