Silicon Laboratories CP250 Series User manual

CP2501-DK

CP250XDEVELOPMENT KIT USER’SGUIDE

1. Kit Contents

The CP250x Development Kit contains the following items:

CP250x Motherboard

CP2501 Development Daughter Board

CP250x Development Kit Quick-Start Guide

Product information CD-ROM including the following:

Silicon Laboratories Integrated Development Environment (IDE)

SDCC Development Tools

Raisonance Development Tools (evaluation version)

Keil 8051 Development tools (evaluation version)

CP250x Configuration Wizard and Bootloader

Source code examples

Documentation

AC-to-DC universal power adapter

Two USB cables

2. Hardware Setup

See Figure 1 for a diagram of the hardware configuration.

1. Attach the daughter board to the motherboard at connectors P1 and P2.

2. Place shorting blocks on J7 and J3 [+3VD, VDD_PWR], as shown in Figure 1.

3. Connect the motherboard’s P5 USB connector to a PC using the USB Cable.

4. Connect the ac-to-dc power adapter to connector P3 on the motherboard.

Notes:

1. Use the Reset icon in the IDE to reset the target when connected during a debug session.

2. Remove power from the motherboard and remove the USB cable before removing a daughter board from the

motherboard. Connecting or disconnecting a daughter board when the power adapter or USB cable are connected can

damage the motherboard or the daughter board.

CP2501-DK

2 Rev. 0.1

Figure 1. Hardware Setup

F326 CP250x-MB

SILICON LABS

www.silabs.com

+3VD

VDD_PWR

VDD_DEBUG

RESET

TB3

TB1

TB2

J15

VPP

J7 J13

D10

D11

D12

SPI_SCLK

SPI_MISO

SPI_MOSI

SPI_NSS

GND

UART_RX

UART_TX

GND

SMBUS_SDA

SMBUS_SCL

GND

USB Cable

Place shorting blocks on

J3 and J7 as shown.

2501

CP2501-GM EDB

SILICON LABS

www.silabs.com

VDD

VREGIN

VBUS

AC Adapter

PWR H1

GPIO7-0

GPIO15-8

CP2501-DK

Rev. 0.1 3

3. Software Installation

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

toolset, 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.

3.1. System Requirements

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

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

One available USB port.

3.2. 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 CP250x 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 8051 Evaluation Toolset. See Section 4. for an overview of all

applicable software included on the CD-ROM.

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

documentation, and drivers.

4. Software Overview

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

microcontroller.

8051 Evaluation Toolset

Silicon Labs Integrated Development Environment (IDE)

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

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

CP250x Configuration Wizard

CP250x USB Bootloader

4.1. 8051 Evaluation Toolset

The Silicon Labs IDE has native support for many third party 8051 toolsets. Included with this kit are several 8051

evaluation assembler, compiler, and linker toolsets. For further information on the tools, including limitations, see

the corresponding application note. Application notes can be found in the documentation section of the

Development Kit CD, or on the Silicon Labs website (http://www.silabs.com/products/mcu/Pages/

ApplicationNotes.aspx). See Table 1 for a list of supported toolsets and associated application notes.

Table 1. Supported Third Party 8051 Toolsets

Toolset Application Note

Keil AN104, “Integrating Keil 8051 Tools into the Silicon Labs IDE”

Raisonance AN125, “Integrating Raisonance 8051 Tools into the Silicon Labs IDE”

SDCC AN198, “Integrating SDCC 8051 Tools into the Silicon Labs IDE”

CP2501-DK

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4.2. Silicon Labs IDE

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

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

target device.

4.2.1. Running the CP250x_NoScreen example program

The CP250x_NoScreen example program drags a simulated finger starting from the top left corner of the screen

towards the middle of the screen and releases.

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\CP250x\NoScreen directory (default) and select the

CP250x_NoScreen.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. CP2501 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.

9. Connect the USB connector on the daughter board to a Windows Vista or Windows 7 PC that supports HID

touchscreens.

10. The device will enumerate and then drag the simulated finger across the screen.

4.2.2. Creating a New Project

Use the following steps to create a new project. Once steps 1-5 in this section are complete, continue at Step 4 in

Section 4.2.1.

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.

CP2501-DK

Rev. 0.1 5

4.3. CP250x Configuration Wizard

The CP250x Configuration Wizard generates the initial firmware project for CP250x devices based on the user’s

system requirements. Code is generated through the use of dialog boxes as shown in Figure 2.

Figure 2. CP250x Configuration Wizard

The CP250x Configuration Wizard 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 firmware that will enumerate over USB as a HID touch screen device. The program is

configurable to output projects for Raisonance, SDCC, and Keil.

For more information, refer to the “AN464: CP250x Programmer’s Guide and API specification.” Documentation

and software is available on the kit CD and from the downloads webpage: www.silabs.com/mcudownloads.

CP2501-DK

6 Rev. 0.1

5. Development Boards

The CP2501 Development Kit includes a motherboard that interfaces to a daughter board. The CP2501

Development Daughter Board contains a CP2501 device to be used for preliminary software development.

Numerous input/output (I/O) connections are provided on the motherboard to facilitate prototyping. Figure 3 shows

the CP250x Motherboard and indicates locations for various I/O connectors and shows the factory default shorting

block positions. Figure 4 shows the available CP250x daughter board.

CP250x Motherboard

P1, P2 Daughter board connection

P3 Power connector that accepts input from 7.5 V dc to 15 V dc unregulated power adapter

P5 USB Debug interface connector

H1 GPIO 7:0 header

H2 GPIO 15:8 header

J1 SMBus Pull-up Resistor Power Header

J2 UART Connection to Debug Adapter

J3 Power Supply Selection Header

J7 Power supply enable header that connects power source selected on J3 to the board's main

power supply net

J13 Additional connections to ground

TB1 UART Interface Header

TB2 SMBus Interface Header

TB3 SPI Interface Header

CP2501 Development Daughter Board

J1 CP2501 VREGIN Input Selection Header

P3 USB connector for touch-screen interface

CP2501-DK

Rev. 0.1 7

Figure 3. CP250x Motherboard with Default Shorting Block Positions

Figure 4. CP2501 Development Daughter Board

F326 CP250x-MB

SILICON LABS

www.silabs.com

+3VD

VDD_PWR

VDD_DEBUG

RESET

TB3

TB1

TB2

J15

VPP

J7 J13

D10

D11

D12

SPI_SCLK

SPI_MISO

SPI_MOSI

SPI_NSS

GND

UART_RX

UART_TX

GND

SMBUS_SDA

SMBUS_SCL

GND

PWR H1

GPIO7-0

GPIO15-8

2501

CP2501-GM EDB

SILICON LABS

www.silabs.com

VDD

VREGIN

VBUS

CP2501-DK

8 Rev. 0.1

5.1. Switch and LEDs

The RESET switch is connected to the RST pin of the CP250x. Pressing RESET puts the device into its hardware-

reset state.

Four LEDs are also provided on the motherboard. The red LED labeled “PWR” (D4), indicates a power connection

to the motherboard. The green LED labeled “RUN” (D10) turns on when the debug circuitry is in a running state;

the red LED labeled “STOP” (D11) turns on when the debug circuitry is in a halted state, and the orange LED

labeled “DEBUG PWR” (D12) indicates whether the debug adapter circuit is being powered through P5's USB

connector. Table 2 lists the port pins and headers corresponding to the switch and LEDs.

5.2. Power Supply Headers (P3, J3, and J7)

The main power supply of the motherboard, which is used to power the daughter board, can be provided by either

the USB debug device’s on-chip voltage regulator or P3 and its associated circuitry. To select a power supply, place

a shorting block on J3 across the appropriate pin pair, as shown in Figure 5. To connect the main power supply to

an attached daughter board, place a shorting block across J7.

Notes:

1. Only two of the pins on the J3 header should be connected at any one time

2. To use the USB debug device’s voltage regulator as the board's power supply, a USB cable must be

connected to P5, and the DEBUG PWR LED (D12) must be on.

Figure 5. J3 and J7 Shorting Block Configuration for Power Options

Table 2. Motherboard LED and Switch Descriptions

Description Component Name I/O Header

RESET SW3 Daughter Board’s RST/C2CK None

Red LED labeled "PWR" D4 Daughter Board’s VDD J3, J7

Green LED labeled "RUN" D10 Debug Adapter Signal None

Red LED labeled "STOP" D11 Debug Adapter Signal None

Orange LED labeled "DEBUG PWR" D12 Debug Adapter Signal None

+3.3V Regulator Power

(From P3) Debug Circuit Power

(From USB at P5)

VDD_PWR

VDD_CP250x J3

VDD_PWR

+3VD

VDD_DEBUG VDD_PWR

+3VD

VDD_DEBUG

VDD_PWR

VDD_CP250x

CP2501-DK

Rev. 0.1 9

5.3. USB Debug Device (DEBUG/P5)

A universal serial bus (USB) connector (P5) provides the onboard debug and programming interface. The debug/

programming MCU and associated circuitry are powered through the USB connector, which can also supply the

rest of the motherboard by routing the USB debug device’s power through J3. The USB debug device also

provides a data communications interface that can be used when the debug adapter is not debugging or

programming a CP250x device.

5.4. UART Communications Interfaces (TB1, J2)

The CP250x Motherboard provides UART to USB communications interfaces through both the TB1 interface and

the communications interface of the USB Debug Adapter. Any external touch screen module using the UART

interface can connect to the CP250x through either header.

The USB debug device’s communications interface connects to a PC through P5. Access to the USB debug

device’s communications interface is provided by the Windows program called “ToolStick Terminal”, which is

available for download for free from the Silicon Laboratories website. See the ToolStick Terminal help file for

information on how to use ToolStick Terminal.

The CP250x Motherboard routes the CP250x’s UART_TX and UART_RX pins to J2, where those signals can be

optionally connected to TB1 header.

5.5. SMBus Communications Interface (TB2, J1)

The CP250x Motherboard connects the SMBus interface pins SMBUS_SDA and SMBUS_SCL to the TB2 header.

These two pins can be pulled up to the VIO net through the two pull-up resistors, R1 and R2, by adding the shorting

block to the J1 header. Only one set of pull-up resistors is required on any SMBus network. The shorting block on

the J1 header should be removed if the pull-up resistors are already present on the network.

The R1 and R2 pull-up resistors are 1K resistors and are located on the backside of the mother board near the TB2

header.

5.6. SPI Communications Interfaces (TB3)

The CP250x Motherboard connects the SPI interface pins, SPI_SCLK, SPI_MISO, SPI_MOSI, and SPI_NSS to

the TB3 header.

5.7. GPIO Interfaces (H1, H2)

The CP2501 devices support 16 GPIO pins (GPIO0 through GPIO15). These GPIO pins are connected to the two

headers H1 and H2.

5.8. Daughter Board (P3, J1)

The P3 header on the daughter board is the USB connection for the CP2501. The J3 header selects how the

CP2501 on the daughter board is powered. If a shorting block is connected to J1[VBUS-VREGIN], the CP2501 is

powered from the P3 USB connector. If a shorting block is connected to J1[VDD-VREGIN], the CP2501 is powered

from the motherboard.

CP2501-DK

10 Rev. 0.1

6. Schematics

Figure 6. CP250x Motherboard Schematic (1 of 2)

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