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resources:fpga:xilinx:pmod:ad7091r [22 Feb 2013 12:15] – Text and archive Alexandru.Tofan | resources:fpga:xilinx:pmod:ad7091r [09 Jan 2021 00:49] (current) – user interwiki links Robin Getz | ||
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**HW Platform(s): | **HW Platform(s): | ||
- | * [[http://www.xilinx.com/products/ | + | * [[xilinx>products/ |
* [[http:// | * [[http:// | ||
- | * [[http:// | + | * [[http:// |
- | **System:** Microblaze, AXI, UART \\ | + | |
===== Quick Start Guide ===== | ===== Quick Start Guide ===== | ||
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==== Required Hardware ==== | ==== Required Hardware ==== | ||
- | * [[http://www.xilinx.com/products/ | + | * [[xilinx>products/ |
- | * [[http:// | + | * [[http:// |
+ | * [[http:// | ||
* [[http:// | * [[http:// | ||
==== Required Software ==== | ==== Required Software ==== | ||
- | * Xilinx ISE 13.2 (Programmer (IMPACT) is sufficient for the demo and is available on Webpack). | + | * Xilinx ISE 14.4 (Programmer (IMPACT) is sufficient for the demo and is available on Webpack). |
- | * A UART terminal (Tera Term/ | + | * A UART terminal (Tera Term/ |
==== Running Demo (SDK) Program ==== | ==== Running Demo (SDK) Program ==== | ||
- | <WRAP round tip 80%>If you are not familiar with LX9 and/or Xilix tools, please visit\\ [[http://www.xilinx.com/products/ | + | < |
- | If you are not familiar with Nexys™3 and/or Xilix tools, please visit\\ [[http:// | + | If you are not familiar with Nexys™3 and/or Xilix tools, please visit\\ [[http:// |
- | </ | + | If you are not familiar with ZedBoard and/or Xilix tools, please visit\\ [[http:// |
- | Extract the project from the archive file (AD7091R_< | + | |
==== Avnet LX9 MicroBoard Setup ==== | ==== Avnet LX9 MicroBoard Setup ==== | ||
+ | |||
+ | Extract the project from the archive file (AD7091R_< | ||
To begin, connect the PmodAD6 to J5 connector of LX9 board, pins 1 to 6 (see image below). You can use an extension cable for ease of use. Connect the USB cables from the PC to the board. Connect the USB cable from the PC to the USB-UART female connector of the board for the UART terminal. The board will be programmed through its USB male connector. | To begin, connect the PmodAD6 to J5 connector of LX9 board, pins 1 to 6 (see image below). You can use an extension cable for ease of use. Connect the USB cables from the PC to the board. Connect the USB cable from the PC to the USB-UART female connector of the board for the UART terminal. The board will be programmed through its USB male connector. | ||
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==== Digilent Nexys™3 Spartan-6 FPGA Board ==== | ==== Digilent Nexys™3 Spartan-6 FPGA Board ==== | ||
+ | |||
+ | Extract the project from the archive file (AD7091R_< | ||
To begin, connect the PmodAD6 to JA connector of Nexys™3 board, pins JA1 to JA6 (see image below). You can use an extension cable for ease of use. Connect the USB cables from the PC to the board, one for programming (Digilent USB device) and one for the UART terminal (FT232R USB UART). | To begin, connect the PmodAD6 to JA connector of Nexys™3 board, pins JA1 to JA6 (see image below). You can use an extension cable for ease of use. Connect the USB cables from the PC to the board, one for programming (Digilent USB device) and one for the UART terminal (FT232R USB UART). | ||
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{{: | {{: | ||
- | ==== FPGA Configuration ==== | + | ==== Avnet ZedBoard ==== |
+ | |||
+ | To begin, connect the PmodAD6 to JD connector of ZedBoard (see image below). You can use an extension cable for ease of use. Connect the USB cables from the PC to the board, one for programming (Digilent USB device) and one for the UART terminal (FT232R USB UART). | ||
+ | |||
+ | {{: | ||
+ | |||
+ | ==== FPGA Configuration | ||
Start IMPACT, and double click " | Start IMPACT, and double click " | ||
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{{: | {{: | ||
- | Here you are some of the errors that can appear while trying to introduce a wrong value for VREF. | + | Here are some of the errors that can appear while trying to introduce a wrong value for VREF. |
If any value besides 1 to 9 is entered, an error message will be displayed. If a value higher than 5250 or lower than 2700 is entered, an error message will be displayed. If entering less than 4 characters, please press [Enter] in order to validate your input. If 4 characters are entered, the result is automatically validated. | If any value besides 1 to 9 is entered, an error message will be displayed. If a value higher than 5250 or lower than 2700 is entered, an error message will be displayed. If entering less than 4 characters, please press [Enter] in order to validate your input. If 4 characters are entered, the result is automatically validated. | ||
{{: | {{: | ||
+ | |||
+ | |||
+ | ==== FPGA Configuration for ZedBoard ==== | ||
+ | |||
+ | Run the **download.bat** script from the " | ||
+ | The script will automatically configure the ZYNQ SoC and download the *.elf file afterwards. | ||
+ | |||
+ | <WRAP center round tip 80%> | ||
+ | If the download script fails to run, modify the Xilinx Tools path in **download.bat** to match your Xilinx Installation path. | ||
+ | </ | ||
+ | |||
+ | If programming was successful, you should be seeing messages appear on the terminal window. The software is programmed with VRef = 2.5 V. If you wish to change Vref, you must modify its value in main.c. | ||
===== Using the reference design ===== | ===== Using the reference design ===== | ||
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==== Functional Description ==== | ==== Functional Description ==== | ||
- | The reference design is a custom SPI Interface, containing CS, SCLK, MISO, and a CONVST signal. | + | === Avnet LX-9 MicroBoard |
- | The hardware SPI access allows receiving data from the AD7091R. | + | The reference design is a custom SPI Interface, containing CS, SCLK, MISO, and a CONVST signal. |
+ | |||
+ | === Avnet ZedBoard === | ||
+ | |||
+ | The reference design is a custom SPI Interface, containing CS, SCLK, MISO, and a CONVST signal. The hardware SPI access allows receiving data from the AD7091R. The software programs the device, and afterwards, using DMA, transfers 8192 samples and prints the input voltage value via UART. | ||
<WRAP round important 80%> | <WRAP round important 80%> | ||
* Connecting the PmodAD6 to the boards using an extension cable provides ease of use. | * Connecting the PmodAD6 to the boards using an extension cable provides ease of use. | ||
- | * UART must be set to 115200 Baud Rate for the Avnet LX-9 Microboard or 9600 Baud Rate for the Digilent Nexys™3 Board. | + | * UART must be set to 115200 Baud Rate for the Avnet LX-9 Microboard |
* When using AVDD > DVDD (= 3.3V), JP1 on PmodAD6 must be removed and the external AVDD signal must be connected to J2 Pin 1. The range for AVDD is 2.7V ≤ AVDD ≤ 5.25V. | * When using AVDD > DVDD (= 3.3V), JP1 on PmodAD6 must be removed and the external AVDD signal must be connected to J2 Pin 1. The range for AVDD is 2.7V ≤ AVDD ≤ 5.25V. | ||
- | When using external VREF, connect the VREF signal to J2 Pin 3. The range for external VREF is 2.7V ≤ VREF ≤ AVDD. | + | * When using external VREF, connect the VREF signal to J2 Pin 3. The range for external VREF is 2.7V ≤ VREF ≤ AVDD. |
</ | </ | ||
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===== Downloads ===== | ===== Downloads ===== | ||
+ | |||
<WRAP round download 80%> | <WRAP round download 80%> | ||
- | {{: | + | \\ |
- | {{: | + | **Avnet LX-9 MicroBoard: **\\ |
+ | * {{: | ||
+ | |||
+ | **Digilent Nexys™3: | ||
+ | * {{: | ||
+ | |||
+ | **Avnet ZedBoard: | ||
+ | * [[https:// | ||
+ | * [[https:// | ||
+ | * [[https:// | ||
+ | * [[https:// | ||
+ | * [[https:// | ||
+ | | ||
</ | </ | ||
+ | <wrap hide> | ||
+ | ====== Linux Device Driver - Custom HDL PCore ====== | ||
+ | |||
+ | Connect PmodAD6 to the JD1 connector of the ZedBoard (upper row of pins). | ||
+ | |||
+ | ===== Preparing the SD Card ===== | ||
+ | |||
+ | In order to prepare the SD Card for booting Linux on the ZedBoard: | ||
+ | * Download the device tree: [[https:// | ||
+ | * Download the Xilinx XPS project: [[https:// | ||
+ | * Download the AD7091R IPcore: [[https:// | ||
+ | * Download the project libraries: [[https:// | ||
+ | * Follow the instructions on the following wiki page, but use the device tree and project downloaded on the previous step | ||
+ | * [[/ | ||
+ | |||
+ | Make sure you have an HDMI monitor connected to the ZedBoard, plug in the SD Card and power on the board. | ||
+ | If everything is correct, the system should boot up. If you don't have an HDMI monitor, connect to the board via UART, Baud Rate 115200. | ||
+ | |||
+ | There are 2 ways to test the driver. | ||
+ | * Using the terminal window | ||
+ | * Using the ADI IIO Oscilloscope | ||
+ | |||
+ | ===== Using the terminal window ===== | ||
+ | |||
+ | Open a new terminal window by pressing **Ctrl+Alt+T**. | ||
+ | |||
+ | Navigate to the location of the device and identify it using the following commands: | ||
+ | < | ||
+ | cd / | ||
+ | ls | ||
+ | iio:device0 iio:device1 trigger0 | ||
+ | cd iio\: | ||
+ | cat name | ||
+ | AD7091R | ||
+ | </ | ||
+ | |||
+ | If the **cat name** command doesn' | ||
+ | < | ||
+ | cd .. | ||
+ | cd iio\: | ||
+ | cat name | ||
+ | </ | ||
+ | |||
+ | To see the list of options that the AD7980 driver provides, type: | ||
+ | < | ||
+ | ls | ||
+ | buffer | ||
+ | </ | ||
+ | |||
+ | To read the raw input voltage, type: | ||
+ | < | ||
+ | cd buffer | ||
+ | echo 128 > length | ||
+ | echo 1 > enable | ||
+ | hexdump -x / | ||
+ | 0000000 | ||
+ | 0000010 | ||
+ | 0000020 | ||
+ | 0000030 | ||
+ | 0000040 | ||
+ | 0000050 | ||
+ | 0000060 | ||
+ | 0000070 | ||
+ | </ | ||
+ | |||
+ | {{: | ||
+ | |||
+ | The commands written above can also be used if not using an HDMI monitor and a wireless keyboard, by using a serial terminal, and typing the commands after the system boot-up is complete. | ||
+ | |||
+ | {{: | ||
+ | |||
+ | ===== Using the ADI IIO Oscilloscope ===== | ||
+ | |||
+ | Install the ADI IIO Oscilloscope using the instructions from the following wiki page: | ||
+ | * [[/ | ||
+ | |||
+ | Launch the ADI IIO Oscilloscope. | ||
+ | Select **AD7091R** from the **Device** drop-down menu. Set the desired number of samples in the **Sample Count** tab. Click the **Green Play Button** in order to start capturing and displaying data. Click **Stop** to stop the process. | ||
+ | {{: | ||
+ | </ | ||
===== More information ===== | ===== More information ===== | ||
* [[ez> | * [[ez> | ||
* Example questions: {{rss> | * Example questions: {{rss> |