Linear Technology Linduino One Kurzanleitung zur Einrichtung

dc2026cfe

DEMO MANUAL DC2026C

DESCRIPTION

Linduino One Isolated

Arduino-Compatible

Demonstration Board

Linear Technology’s DC2026 (called the Linduino

One) is

compatible with the Arduino Uno microcontroller board.

Arduino hardware consists of an Atmel microcontroller

with a bootloader allowing quick in-circuit firmware up-

dates.Thesoftwareisasimpleprogrammingenvironment

based on the AVRGCC compiler. This platform is popular

because it is easy to use, both the hardware and software

are open source, and it can be programmed in C. We find

it an ideal way to demonstrate and distribute libraries for

integrated circuits that have digital interfaces such as

Inter-IntegratedCircuit(I2C)andSerialPeripheralInterface

(SPI). While the Linduino One is Arduino-compatible, it

is not produced by the official Arduino team, and they do

not receive any monetary support from this board. Please,

considersupportingthembypurchasingotheritemsfrom:

http://store.arduino.cc

L, LT, LTC, LTM, Linear Technology, Linduino and the Linear logo are registered trademarks

and QuikEval are trademarks of Linear Technology Corporation. All other trademarks are the

property of their respective owners.

The Linduino One adds several features to the standard

Arduino Uno board:

• A14-pinQuikEval™connectorprovidesadirectconnec-

tion to a growing list of hundreds of Linear Technology

demo boards, including ADCs, DACs, Power System

Management, RF Synthesizers, System Monitor and

Control, and many others.

• Selectable 5V, 3.3V, 2.5V, 1.8V logic levels and analog

supply on QuikEval Connector

• An LTM

2884 provides galvanic isolation of USB data

and power for both safety and noise rejection.

• Auxiliary 7V to 20V power input on isolated side, with

conversion to 5V provided by an LT

3973 allowing high

power operation up to 750mA.

Design files for this circuit board are available at

http://www.linear.com/demo/DC2026C

Figure 1. Linduino One Basic Connections

AUXILIARY

POWER

USB TO

COMPUTER

7V TO 20V

+ –

IN-CIRCUIT

PROGRAMMING

HEADER

J1 I/O VOLTAGE

SELECTION

ARDUINO SHIELD HEADERS

QUIK-EVAL

COMPATIBLE

DEMO BOARD

14 CONDUCTOR

RIBBON CABLE

ARDUINO SHIELD HEADERS

dc2026cfe

DEMO MANUAL DC2026C

QUICK START GUIDE

The Linduino One comes preloaded with a DC590 emula-

tor program (called a “sketch”) that allows attached demo

boards to run with the standard QuikEval GUI software.

This allows the functionality of the board to be verified

before starting firmware development. After evaluation

with QuikEval, the Linduino One can be reprogrammed

with customer code. There is a top-level demonstration

sketch for each part’s library that provides a text terminal

interfacetotheboard,demonstratingthelibraryfunctions.

TheLinduino Oneis alsoavailable asDC2026C-KIT, which

includes a DC934 as an easy to use example daughter

board.DC934isthedemonstrationboardfortheLTC

2607

dual 16-bit, I2C digital to analog converter (DAC). This

board also has an LTC2422 2-channel, 20-bit, SPI inter-

face analog to digital converter (ADC) that reads back the

DAC output. Thus, this board demonstrates operation of

both SPI and I2C interfaces, and multichannel ADCs and

DACs. The following sections describe the procedure for

installing the required software and operating the DC934

with both QuikEval software and with a terminal based

demo program.

While this manual describes operation with the DC934,

the procedure applies to other boards as well.

Manual Software Installation

1) Download LTSketchbook.zip from www.linear.com/

docs/43958.ThisistheentirecodebasefortheLinduino

board, including all demo code, libraries for individual

devices,auxiliaryfunctions, andHTMLdocumentation.

Extract this file to a location for working files, such as

your “My Documents” directory or “C:\Projects”.

2) Note: If QuikEval is already installed, please update to

the latest version by selecting Tools → Update Pro-

gram, then proceed to step 3. If not, download and run

QuikEval from www.linear.com/software. This installs

the QuikEval program, as well as the FTDI USB drivers

required for the Linduino One (and other Linear Tech-

nology interface boards.) Drivers are also distributed

with the Arduino IDE, but it is recommended to let

QuikEval install the drivers to ensure compatibility with

the Linduino One. You will be prompted to connect the

boardto thePCduring installation.Oncethe installation

is complete, quit QuikEval.

3) Download the Arduino Integrated Development Envi-

ronment (IDE) from either

http://arduino.cc/en/Main/Software or

http://www.linear.com/designtools/linduino.php

(Version 1.6.4 is used in this manual.) This is not an

installer;noinstallationisnecessary.Extractthecontents

ofthisfiletoaconvenientlocationforprograms,suchas

“C:\Program Files”. The “Arduino.exe” file is the actual

program file; double-click to open the Arduino IDE.

dc2026cfe

DEMO MANUAL DC2026C

QUICK START GUIDE

Arduino IDE Setup

1) From within the Arduino IDE, click on File → Preferences

Under Sketchbook Location: select Browse, and locate the path to the extracted LTSketchbook.zip file. The correct

location will show “LTSketchbook” in the Look In menu, and at least four subdirectories will be shown: Documenta-

tion, Libraries, Part Number and Utilities (more may be added in the future). Click Open, then click OK.

dc2026cfe

DEMO MANUAL DC2026C

2) Under Tools menu, select Board →Arduino Uno

QUICK START GUIDE

dc2026cfe

DEMO MANUAL DC2026C

3) Under the Tools menu, select Serial Port. There may be more than one option; the Linduino One is usually the

highest COM port number (COM12 is shown below).

QUICK START GUIDE

dc2026cfe

DEMO MANUAL DC2026C

QUICK START GUIDE

4) Click on the Serial Monitor, which looks like a magnifying glass:

This will bring up the monitor window:

Select Newline terminator and set the baud rate to 115200. You should see a “hello” message – this indicates that

serial communication is set up properly, and that the DC590 emulator firmware is properly installed. Pressing the

RESET button on the Linduino One will cause the message to be sent again. If this message does not appear, try a

different COM port.

(Note: The DC590 emulator sketch can be restored by following the procedure detailed below for uploading the

DC934 sketch, substituting the DC590 sketch which is located in File → Sketchbook →Utilities →DC590B.)

5) Quit the Arduino IDE. Note that a restart is required every time the Sketchbook location is changed.

dc2026cfe

DEMO MANUAL DC2026C

QUICK START GUIDE

Running with QuikEval

Linear Technology demo boards with the 14-pin QuikEval

connectorarenormallyusedinconjunctionwithaDC590B

interfaceboardandtheQuikEvalsoftwarepackagerunning

on a PC. Designers can then use the software to evaluate

the performance of the product on the demo board. The

Linduino One comes programmed with firmware that al-

lows it to emulate the DC590B controller, so the QuikEval

software can be used to check basic functionality in a

target system.

Connect the DC934 to the Linduino One with the supplied

14-pin ribbon cable. Run QuikEval. The control panel for

the LTC2607 will appear, and clicking COLLECT will start

communication with the board. The onboard LTC2422

ADC reads back the output voltages, and the voltage may

be changed by entering a number in the appropriate box

or by moving the sliders.

Quit QuikEval after this step.

dc2026cfe

DEMO MANUAL DC2026C

Running with the Linduino Demonstration Program

After the DC934 has been run with the user-friendly QuikEval GUI, a demonstration program can be loaded into the

Linduino One that demonstrates the library functions for the LTC2607 and LTC2422.

1) Open the Arduino IDE. Find the part number on the demo board, LTC2607 in this case. In the File menu select

Sketchbook →Part Number →2000 →2600 →2607 →DC934A.

(There may be other entries for a particular part number showing example usage cases, experiments, etc. The entry

for the demo circuit number is the general-purpose demonstration program and is a good place to start.)

QUICK START GUIDE

dc2026cfe

DEMO MANUAL DC2026C

A new window will appear with the sketch.

2) Upload the sketch by clicking the UPLOAD button:

When this process is completed, a message at the bottom should display a similar message as shown.

QUICK START GUIDE

dc2026cfe

DEMO MANUAL DC2026C

QUICK START GUIDE

3) Open the Serial Monitor (magnifying glass icon) once more. The monitor will now display the program interface.

To use the program, enter commands into the text box, then click the Send button.

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