CN0202 FMC-SDP轉(zhuǎn)接器和評(píng)估板/Xilinx KC705參考設(shè)計(jì)
資料介紹
Table of Contents
CN0202 FMC-SDP Interposer & Evaluation Board / Xilinx KC705 Reference Design
Supported Devices
Reference Circuits
Overview
This document presents the steps to setup an environment for using the EVAL-CN0202-SDPZ evaluation board together with the Xilinx KC705 FPGA board and the Xilinx Embedded Development Kit (EDK). Below is presented a picture of the EVAL-CN0202-SDPZ Evaluation Board with the Xilinx KC705 board.
For component evaluation and performance purposes, as opposed to quick prototyping, the user is directed to use the part evaluation setup. This consists of:
- 1. A controller board like the SDP-B ( EVAL-SDP-CS1Z)
- 2. The component SDP compatible product evaluation board
- 3. Corresponding PC software ( shipped with the product evaluation board)
The SDP-B controller board is part of Analog Devices System Demonstration Platform (SDP). It provides a high speed USB 2.0 connection from the PC to the component evaluation board. The PC runs the evaluation software. Each evaluation board, which is an SDP compatible daughter board, includes the necessary installation file required for performance testing.
Note: it is expected that the analog performance on the two platforms may differ.
Below is presented a picture of SDP-B Controller Board with the EVAL-CN0202-SDPZ Evaluation Board.
The EVAL-CN0202-SDPZ board provides a full function, high voltage (up to 44 V), flexible, programmable analog output solution that meets most requirements for programmable logic controller (PLC) and distributed control system (DCS) applications. When using this evaluation board with the SDP board or BeMicro SDK board, apply +6 V and GND to Connector CN2, 12-50 V and GND to Connector CN3.
The AD5662 low power (0.75 mW typical @ 5 V), rail-to-rail output, 16-bit nanoDAC? device and the AD5751 industrial current/voltage output driver are well matched with respect to input and output voltage ranges, as well as reference voltage requirements.
The AD5662, a member of the nanoDAC family, is a low power, single, 16-bit buffered voltage-out DAC that operates from a single 2.7 V to 5.5 V supply and is guaranteed monotonic by design.
The AD5662 requires an external reference voltage to set the output range of the DAC. The part incorporates a power-on reset circuit that ensures the DAC output powers up to 0 V (AD5662x-1) or to midscale (AD5662x-2), and remains there until a valid write takes place. The part contains a power-down feature that reduces the current consumption of the device to 480 nA at 5 V and provides software-selectable output loads while in power-down mode.
The low power consumption of this part in normal operation makes it ideally suited to portable battery-operated equipment. The power consumption is 0.75 mW at 5 V, going down to 2.4 μW in power-down mode. The AD5662’s on-chip precision output amplifier allows rail-to-rail output swing to be achieved. For remote sensing applications, the output amplifier’s inverting input is available to the user.
The AD5750/AD5750-1 are single-channel, low cost, precision voltage/current output drivers with hardware- or software- programmable output ranges. The software ranges are configured via an SPI-/MICROWIRE?-compatible serial interface. The AD5750/AD5750-1 target applications in PLC and industrial process control. The analog input to the AD5750/AD5750-1 is provided from a low voltage, single-supply digital-to-analog converter (DAC) and is internally conditioned to provide the desired output current/voltage range. Analog input ranges available are 0 V to 2.5 V (AD5750-1) or 0 V to 4.096 V (AD5750). The output current range is programmable across five current ranges: 4 mA to 20 mA, 0 mA to 20 mA or 0 mA to 24 mA, ±20 mA, and ±24 mA. An overrange of 2% is available on the unipolar current ranges. Voltage output is provided from a separate pin that can be configured to provide 0 V to 5 V, 0 V to 10 V, ±5 V, or ±10 V output ranges. An overrange of 20% is available on the voltage ranges. Analog outputs are short-circuit and open-circuit protected and can drive capacitive loads of 1 μF and inductive loads of 0.1 H. The device is specified to operate with a power supply range from ±12 V to ±24 V. Output loop compliance is 0 V to AVDD - 2.75 V. The flexible serial interface is SPI and MICROWIRE compatible and can be operated in 3-wire mode to minimize the digital isolation required in isolated applications. The interface also features an optional PEC error checking feature using CRC-8 error checking, useful in industrial environments where data communication corruption can occur. The device also includes a power-on reset function, ensuring that the device powers up in a known state (0 V or tristate), and an asynchronous CLEAR pin that sets the outputs to zero scale/midscale voltage output or the low end of the selected current range. An HW SELECT pin is used to configure the part for hardware or software mode on power-up.
More information
- CN0202 Product Info - pricing, samples, datasheet
- AD5662 Product Info - pricing, samples, datasheet
- AD5750 Product Info - pricing, samples, datasheet
Getting Started
The first objective is to ensure that you have all of the items needed and to install the software tools so that you are ready to create and run the evaluation project.
Required Hardware
- FMC-SDP adapter board
- EVAL-CN0202-SDPZ evaluation board
Required Software
- Xilinx ISE 14.6.
- UART Terminal (Termite/Tera Term/Hyperterminal), baud rate 115200.
- The EVAL-CN0202 reference project for Xilinx KC705 FPGA.
Downloads
- Xilinx Boards Common Drivers: https://github.com/analogdevicesinc/no-OS/tree/master/platform_drivers/Xilinx/SDP_Common
- EDK KC705 Reference project: https://github.com/analogdevicesinc/fpgahdl_xilinx/tree/master/cf_sdp_kc705
Run the Demonstration Project
Hardware setup
Before connecting the ADI evaluation board to the Xilinx KC705 make sure that the VADJ_FPGA voltage of the KC705 is set to 3.3V. For more details on how to change the setting for VADJ_FPGA visit the Xilinx KC705 product page.
- Use the FMC-SDP interposer to connect the ADI evaluation board to the Xilinx KC705 board on the FMC LPC connector.
- Connect the JTAG and UART cables to the KC705 and power up the FPGA board.
Reference Project Overview
The following commands were implemented in this version of EVAL-CN0202 reference project for Xilinx KC705 FPGA board.
Command | Description |
---|---|
help? | Displays all available commands. |
register= | Write a value to the DAC register. Accepted values: 0 .. 65535 - value to be written in register. |
register? | Displays the last value written to the DAC register. |
ad5750clrPin= | Sets the output value of CLR pin. Accepted values: 0 - sets the CLR pin low.(default) 1 - sets the CLR pin high. |
ad5750clrPin? | Displays the output value of CLR pin. |
addressA0= | Sets the value of A0 address bit(JP1). Accepted values: 0 - address is 0b000.(default) 1 - address is 0b001. |
addressA0? | Displays the value of A0 address bit(JP1). |
range= | Sets the output range for AD5750. Accepted values: 0 → 0V to 5V. 1 → 0V to 6V. 2 → 0V to 10V. 3 → 0V to 12V. 4 → -2.5V to +2.5V. 5 → -5V to +5V. 6 → -6V to +6V. 7 → -10V to +10V. 8 → -12V to +12V. 9 → 4mA to 20mA(internal). 10 → 4mA to 20mA(external). 11 → 0mA to 20mA(internal). 12 → 0mA to 20mA(external). 13 → 0mA to 24mA(internal). 14 → 0mA to 24mA(external). 15 → -20mA to +20mA(internal). 16 → -20mA to +20mA(external). 17 → -24mA to +24mA(internal). 18 → -24mA to +24mA(external). 19 → 3.92mA to 20.4mA(internal). 20 → 0mA to 20.4mA(internal). 21 → 0mA to 24.5mA(internal). |
range? | Displays the current output range. |
fault? | Displays the list of possible faults. |
Commands can be executed using a serial terminal connected to the UART peripheral of Xilinx KC705 FPGA.
The following image shows a generic list of commands in a serial terminal connected to Xilinx KC705 FPGA's UART peripheral.
Software Project Setup
The hardware platform for each reference projects with FMC-SDP interposer and KC705 evaluation board is common. The next steps should be followed to recreate the software project of the reference design:
- First download the KC705 Reference project from Github on your computer. You can do this by clonning this repository: https://github.com/analogdevicesinc/fpgahdl_xilinx.
- From this entire repository you will use cf_sdp_kc705 folder. This is common for all KC705 projects.
- Open the Xilinx SDK. When the SDK starts, it asks you to provide a folder where to store the workspace. Any folder can be provided. Make sure that the path where it is located does not contain any spaces.
- In the SDK select the File→Import menu option to import the software projects into the workspace.
- In the Import window select the General→Existing Projects into Workspace option.
- In the Import Projects window select the cf_sdp_kc705 folder as root directory and check the Copy projects into workspace option. After the root directory is chosen the projects that reside in that directory will appear in the Projects list. Press Finish to finalize the import process.
- The Project Explorer window now shows the projects that exist in the workspace without software files.
- Now the software must be added in your project. For downloading the software, you must use 3 links from Github given in Downloads section. From there you'll download the specific driver, the specific commands and the Xilinx Boards Common Drivers(which are commons for all Xilinx boards). All the software files downloaded must be copied in src folder from sw folder.
- Before compilation in the file called Communication.h you have to uncomment the name of the device that you currently use. In the picture below there is an example of this, which works only with AD5629R project. For another device, uncomment only the respective name. You can have one driver working on multiple devices, so the drivers's name and the uncommented name may not be the same for every project.
- The SDK should automatically build the project and the Console window will display the result of the build. If the build is not done automatically, select the Project→Build Automatically menu option.
- If the project was built without any errors, you can program the FPGA and run the software application.
More information
- Example questions:
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