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The page provides a starting point for developing your own code for Analog Devices EVAL-AD590-ARDZ board in your own environment utilizing the benefits of the Mbed platform. Analog Devices is an MBED Partner and develops code on the platform for multiple products. The Analog Devices Mbed code-repo can be found in the links below.
This guide will focus on the Analog Devices SDP-K1 controller board, as it is directly compatible with the EVAL-AD590-ARDZ evaluation board and is an MBED-Enabled device. Customers are of course, not limited to using the SDP-K1 board for code development, given that any ARM-based, MBED-enabled board that satisfies a small set of requirements can use the provided code and it will work with only minor changes to the source (see below).
It is further assumed that SDP-K1 board will be connected to the appropriate AD590 Eval-board such as the EVAL-AD590-ARDZ Evaluation board which has the LTC2488 (SPI) built in with the ability to connect external sensor via headers on the board.
Connecting the EVAL-AD590-ARDZ evaluation board using the SDP connector on the K1 is the simplest and most convenient way to get up and running quickly, simply mate the two boards to together.
The EVAL-AD590-ARDZ board supports remote AD590 through the P6 3-position wire to Board terminal block located at the top left of the eval board. There is no need to adjust the source code to start using the remote sensors. Selecting these devices can be done within the provided application which is described below.
For developing firmware code for controller boards on the Mbed platform visit the link below.
Build Guide for Precision Converters MBED firmware (Use below link):
At this time Analog Devices supports Mbed code development only on the Mbed online-compiler. See here for instructions on setting up an account and using the compiler. Analog Devices may, at a later date support other offline-IDE's. This guide focuses on the SDP-K1, connected to the EVAL-AD590-ARDZ board, but it should be general enough to cover any compatible controller board (the controller board should be Mbed-enabled, and expose at least SPI or I2C and some GPIO's).
The software described below allows for an Mbed enabled controller board to be connected with an Analog Devices evaluation board. Unmodified, the code will communicate over any serial terminal emulator (CoolTerm, putty, etc) using the UART provided by the controller board over USB.
The software provides a basic user-interface for interacting with temperature sensors on the evaluation-board. All the main functionality of the AD590 is provided in the application-code in abstracted form and the user is free to customize the software to suit their own needs for working with the sensors
If you have some familiarity with the Mbed platform, the following is a basic list of steps required to start running the code, see below for more detail.
The firmware is delivered as a basic, text-based user-interface that operates through a UART on the controller board using the same USB cable that is used to flash the firmware to the boards. Any terminal-emulator should work, but it is not possible for Analog Devices to test everyone. It is necessary to connect a serial terminal-emulator to interact with the running firmware.
Here TeraTerm is used as an example, Analog Devices does not endorse any particular program for this, but TeraTerm works well and is made freely available, other terminals such as CoolTerm, or PuTTY will work.
Set the baud-rate for 230400, configure the console terminal settings as shown in the picture above and select the connected controller board’s COM port. If using TeraTerm, you should be able to keep the defaults, however adjustments may need to be made to how carriage return (CR) is handled in order for everything to display correctly.
The software is designed to be straight forward to use and requires little explanation. Simply select which sensor you would like to use, whether you want to use the internal sensor or a remote one and then simply enter a number corresponding to the required command and follow the on-screen prompts. The code is also written with a view to keeping things simple, you do not have to be a coding-ninja to understand and expand upon the delivered functions.
It is hoped that the most features of the AD590 are coded, but it's likely that some special functionality is not implemented.