Two wires, serial data (SDA) and Disposes this instance. VCP is the simpler way to do things: FTDI devices show up as serial port devices, and the OS exposes them as COM/TTY devices natively. Next the code creates a FT232H object also like was done in the GPIO example. (Inherited from Board ) Create OrGetI2c Bus (Int32) Create an I2C bus instance or return the existing instance for this bus. Jun 27, 2020 · As for the Python code, things are a bit more complex. 1 Opening the sample code in Visual Studio (FT232H I2C Master application) Open the D2xx TTY program provided in the zip file. ・電源V_DDはFT232Hの5V、(3. FT232H GPOI example (Windows). In the next section we'll go through this code and talk about how it works. Users can use the example schematic (refer to Figure 3) and functional software code (section 3) to begin their design. This application note provides an example of using the MPSSE feature of the FT232H device as an I2C Master with a Visual Basic . The application example also duplicates the JTAG timing expected to be seen by the SN74BCT8244A to Jun 3, 2024 · Instead, in this guide we will use an FT232H as a 'gateway' so that you can use any computer and read/write the SPI flash through the command line. To run the sample without debugging, press Ctrl+F5 or select Debug > Start Without Debugging. the set up the MPSSE. Featuring the new FT232H, this module provides an engineer with an easy way to integrate the FT232H into a proof-of-concept design, or quickly modify an existing product. 3V output to MCP23017 Vdd. Examples at hotexamples. To download this example, please click here. 2. Note: FTDI USB3. This application note illustrates how to use the MPSSE of the FT2232H to interface with the SPI bus. 0 solutions also include FIFO interfaces but not included in the scope of this document. exe file used to run the application. 5" display, be sure to make the necessary changes as well. The LibMPSSE-I2C library has been created to to aid the implementation of I2C designs using FTDI devices which incorporate the FTDI MPSSE (FT4232H, FT2232H, FT2232D and FT232H) by taking care of all the required MPSSE commands. Tested on: Windows 10, Python 3. Nov 12, 2014 · Notice that the code starts by importing the FT232H part of the GPIO library and disabling the FTDI serial drivers as your saw in the GPIO example. The MPSSE command structure is easiest to explain with a worked example, and since SPI (Serial Peripheral Interface) is the simplest clocked serial protocol it supports, we’ll start with that. Note: All sample code and utilities provided in this note are for illustration purposes and are not guaranteed or supported. Add to Cart. # This matches the protocol for I2C communication so multiple devices can. To associate your repository with the ft232h topic, visit your repo's landing page and select "manage topics. In this project, the device is used to interface to a Texas Instruments INA219 voltage and current sensing amplifier, in order to create a small adapter for measuring the DC voltage FT232H SPI Current Meter. 95. Read data. SPI object using the FT232H device that was just created. - fras/ft232h. The LibMPSSE-SPI library has been enhanced to make it simple to use and a programmer’s guide has been created. Difficulty: Beginner. py. For example, before "Connect Device" is displayed you must run "Device List. On completion of reading this app note the reader should be able to: Configure a FT2232H device for synchronous 245 FIFO mode Configure a FT232H device for synchronous 245 FIFO mode FTDI GPIO example. Oct 30, 2019 · $2 for 5 PCBs Any Color https://jlcpcb. Feb 12, 2020 · STEMMA QT connector - The new version has a Stemma QT connector that lets you plug & play any Stemma QT or Qwiic devices, sensors and displays. This is the mode that Arduinos use (in most cases). FT232R (single port, 3Mbps) FT230X/FT231X/FT234X (single port, 3Mbps) UART, GPIO and multi-serial protocols (SPI, I2C, JTAG) bridges. This page (Downloads) was last updated on Mar 08, 2024. The next line of code creates a FT232H. Once configured, get_port() should be invoked to obtain an I2c port for each I2c slave to drive. See notes at top of . FT2232H has 2 sub device, A and B. Mar 8, 2024 · Examples. USB to SPI gateway You will need the FT232H breakout, and if you have a chip in a package that is not breadboard-able right away you will need a socket or an adapter board. 1. Programming Language: C# (CSharp) Namespace/Package Name: MadeInTheUSB. 3 days ago · Connect your MCP230xx to your CircuitPython board using a standard I2C connection. 1 Introduction. To read more about OpenOCD please refer to this getting started guide. Hi, Yes, to enable MPSSE mode you need to set the bit mode to 0x02 using the FT_SetBitMode function. Warning: This function should not be called from two applications or from two threads at the same time. (Inherited from Ftx232HDevice ) CreateI2c Device (I2c Connection Settings) Create an I2C device instance on a default bus. There are three types of bit-bang mode for the FT-X series: Asynchronous Bit-Bang Mode where any data will be self-clocked via the data pins. One LED of any color. Jun 3, 2024 · the same steps to solder the header pins to the FT232H breakout board. Using the on-board EEPROM, these capabilities include the ability to configure the FT232H as either a serial data transfer interface (JTAG/SPI/I2C/UART – as FT232Hへの接続. the MPSSE basics document i linked previously explains this. Using a serial EEPROM interface, this device can be configured for a wide variety of asynchronous and Jul 24, 2015 · This module allows you to easily write Python code that reads the humidity, temperature, pressure, and more from the sensor. All right, now that all that annoying install stuff is done, let's have some fun. Search this link for an appropriate cable. This program can also be used for programming the external EEPROM over USB in a manufacturing environment. FT232H. Nov 12, 2014 · Assembled FT232H breakout board. Nov 20, 2014 · Using this you can make a really simple script to enumerate all the I2C devices on the bus. With added Power Delivery (PD) functionality to the existing High Speed Series. 9-12: Boolean flags for controlling the flow of the menu. you could find these in ip-core dir in this project), but they all seem to lose 1 byte data every 512 bytes on my BeMicro CV + UM232H system. Operating at USB Hi-Speed 480Mbps rate, this fast single channel bridge chip features either a flexible serial interface or parallel FIFO interface The Graphical interface would also require porting to the new platform/language. 1 I2C Bus Introduction I2C is a low- to medium-data-rate master/slave communication bus. Download and Install Visual Studio Code to prepare your development machine. Re: FT232H Configuration. DLL allows you to send commands to the MPSSE engine. 2. 3Vでも可のはず). py files contain tests. Compared with the chunkier JST PH these are 1mm pitch instead of 2mm, but $0. The dedicated SPI and I2C mode version are basically "built" ontop of the MPSSE/FTD2XX. You can use this sensor with any CircuitPython microcontroller board or with a computer that has GPIO and Python thanks to Adafruit_Blinka, our CircuitPython-for-Python compatibility library. Just select Device ->Serial Protocol->Connection from Polymorphic drop-down menu. There's even a handful of digital GPIO pins that you can read and write to do things like flash LEDs, read switches or buttons, and more. NET Runtime. _ft232h. The buttons are shown in the screen shot in Figure 8. Subscribe. Provides a framework for easily setting up one of these chips from MATLAB, using a windows library provided by FTDI. Suported FTDI devices include: UART and GPIO bridges. Step 3 - Install Meadow Project Templates. A and B have the exact same pin numbering and are both 16 pins. The FT232H CBUS Bit-Bang mode is very similar to that of the FT232R device. The MPSSE can be configured to a number of industry standard serial interface protocols such as JTAG, I2C or SPI (MASTER), or it can be used to implement a proprietary bus protocol. FT232H LibMpsse_AccessToCppDll - 10 examples found. NET on Meadow. This guide was first published on Nov 12, 2014. Use the same voltage that the microcontroller logic is based off of. For most Arduinos, that is 5V. Try writing code. The LibMPSSE-I2C library has been enhanced to make it simple to use and a programmer’s guide has been created. In Win10 Home, I have used FTD2XX_NET and dotnet 6 framework and managed to talk to USB chip as per C#-example 3 on code examples section on the ftdi website. 8" ILI9341 touchscreen breakout. In ‘Directory, Name and Top-Level Entity’, type in a project name and select a convenient project location. Jun 19, 2010 · Install the DLL and use the functions (in cluded in the DLL) according the description / examples. All of these devices function as FIFO slaves. These could be modified to add FT2232H/FT4232H support by referring to the code provided with this application note. Ubuntu and Windows 10 console applications using FT2232HL USB adapter to communicate with SPI and I2C slave devices - har-in-air/FT2232H_CODE_EXAMPLES Jun 22, 2020 · MPSSE highlighted inside FT232H block diagram – Datasheet. Other resistor leg to FT232H GND. The UM232H is ideal for development purposes to quickly prove functionality of adding USB to a target design. Sep 29, 2019 · This 4-wire cable is 50mm / 1. Part No: UM232H. To use: make sure the I2C switch is set to ON to use the STEMMA QT connector. A small resistor between ~330-1000 Ohms to limit current through the LED. In that case do: Jun 25, 2019 · Finally I tested the FTDI USB device with an Infineon pressure sensor with the device ID 0x10. 8, Modelsim 2020. Enter “ft2232h_phy_top” as top module name. Foundation a platform for quickly and easily building connected things using. FT232H() Then in the device's initializer pass in the FT232H device as the value of the optional i2c parameter. « Reply #4 on: May 24, 2022, 03:16:32 pm ». This example program is the source code for the FT2232C Test Application from our Utilities page. Guide Type: Project. And also the IDE, compiler, language you generate the GUI with. I2c master. ・クロックは Examples. Dec 5, 2018 · MPSSE example: SPI output. The application is written in C# and provides an example of importing and using a subset of the LibFT260 functions in C# GUI applications. More than 100 million people use GitHub to discover, fork, and contribute to over 420 million projects. The following sections will provide some basic examples for the main use cases - GPIO, I2C, and SPI. FT232H – Hi-Speed Single Channel USB UART/FIFO IC. Open Pin (Int32) Opens a pin in order for it to be ready to use. It was last updated on Mar 08, 2024. C# (CSharp) MadeInTheUSB. The Graphical interface would also require porting to the new platform/language. Also, check the FT232H SPI page for a simplified test for SPI TFT displays (https:// jtag quartus blaster ft4232h ft232h mpsse ft2232h ft2232d Updated Feb 22, 2024; C; micro har-in-air / FT2232H_CODE_EXAMPLES Star 4. 1. I am a newbie to all this. Once the headers are soldered to the board, plug in a micro USB cable to the port on the FT232H breakout and then plug the cable into a computer or laptop. As an example in this project, we'll wire up an LCD 20x4 character display and control it using Meadow. We also add an import for digitalio (since it wasn't in there) and change the CS pin to the one we are using with the FT232H - C0. I can read the Serial number, description from the USB chip. " Let's walk through the code, Code Link. So you can "copy" this sequences generation into your code and skip the Note that software code listing is provided as an illustration only and not supported by FTDI. This chipset come into various boards using different naming. FT232H as FT232H. mpsse_set_clock (clock_hz, three_phase=True) # Enable drive-zero mode to drive outputs low on 0 and tri-state on 1. An I2c master should be instanciated only once for each FTDI port that supports MPSSE (one or two ports, depending on the FTDI device). Nov 21, 2014 · FT232H. (Inherited from GpioDriver ) Get Pin Mode (Int32) Gets the mode of a pin. 0 Issue Date: 2020-05-12 This document demonstrates using the FT260 as a USB-I2C Master interface to read data from an I2C sensor. Re: FT232H Asynchronous Bit-Bang. Open. With the current meter connected to the USB port, at least 1 device should be found. Congratulations your FT232H board is assembled! Simulation code to verify ftdi_245fifo_top; FPGA sample code as a demo of using ftdi_245fifo_top; For Host-PC, I provide: FTDI driver installation tutorials, Python3 FTDI USB software library (ftd2xx and ftd3xx) installation tutorials, Several Python3 programs for testing. Apr 22, 2015 · To connect the assembled BNO055 breakout to an Arduino Uno, follow the wiring diagram. FIFO code examples in C++ and Verilog are available in the appendix and can be downloaded from the FTDI website. FT2232C/D (dual port, clock up to 6 MHz) Mar 8, 2024 · Setup. setBitMode (OP, 1) # Set pin as output, and async bitbang Current workflow is based on the pyhdlsim example - sim. Board ground/GND to MCP23017 Vss. So before we can actually use the FT232H, we need to get everything setup. use_FT232H() Jul 16, 2020 · 1 Introduction. It was last updated on Jun 13, 2024. These are the top rated real world C# (CSharp) examples of MadeInTheUSB. It can be used to test the handshaking lines on FT2232C based RS232/RS485/RS422 designs. Step 1 - Install . There’s no firmware to deal with, so you don’t have to deal with how to . The code will demonstrate connecting a FT232H in MPSSE mode to emulate an I2C master interface that interacts with the FT201X USB to I2C bridge. Remember to make sure it is micro not mini. Note that the example software is for illustration and is neither guaranteed nor supported by FTDI. The test features require the test cable shown on Jun 21, 2023 · For C++ and JavaScript, select No for Debugging > Require Authentication in your Project properties. In this project, the device is used to interface to a Texas Instruments INA219 voltage and current sensing amplifier, in order to create a small adapter for measuring the DC voltage FT232H and Serial Port. Sep 16, 2020 · Step 2: A Project Wizard will open up. use the example schematic and functional software code to begin their design. Press F5 or select Debug > Start Debugging. adafruit_blinka - Runtime utility objects for re-implementation of CircuitPython API; ContextManaged; Enum; Lockable; patch_system() analogio - Analog input and output control; bitbangio - Bitbanged bus protocols; I2C; SPI; board - Define ids for available pins; busio - Bus protocol support like I2C and SPI The FT232H breakout is like adding a little swiss army knife for serial protocols to your computer! This chip is powerful and useful to have when you want to use Python (for example) to quickly iterate and test a device that uses I2C, SPI or plain general purpose I/O. m file for instructions on getting the library file. Important notes: FT232H has a total of 16 pins. If you are using Windows Powershell, the syntax is a little different. For example with the BMP085/180 breakout the code would look like: Jul 9, 2020 · Upload the secrets file, background image, font folder and the above example code to your Pi. The first thing you will need to do is be sure the solderable jumpers on the back of the TFT breakout is setup to use SPI. Using the FT232H for running the PyPortal examples will require 3 main components. 95 -. FT260 I2C Example in C# Version 1. First you'll need to include the FT232H module, enable the FT232H, and create an FT232H device by adding to the start of the code: import Adafruit_FT232H as FT232H # Temporarily disable FTDI serial drivers to use the FT232H device. com In this video I am showing you how I designed and built my FT232H breakout board and how to use it to add a SPI/JT Sep 29, 2019 · Set Environment Variable. FTDI drivers come in two flavors: VCP (“Virtual Com Port”) and D2XX. py You should get something like this on the display. Adafruit FT232H. Jumper wires & breadboard. We can run the simple test example from the library. NET runtime. vi Use “Open. Grab the latest library code and install it again using the --force option like I mentioned above, then run this script with some I2C devices connected to the FT232H: Code: Select all. Import two modules of pre-written code. Examples; API Reference. the LibMPSSE-SPI user guide explains the API and how it is built on the D2XX driver. Connect Vin (red wire, positive) to the power supply, 3-5V is fine. It is set up to use I2C by default, so we need to comment out the I2C stuff and uncomment the SPI stuff. Text editor powered by tinymce. This guide was first published on Nov 21, 2014. The FT232H and FT4232H can also be used with the example in this document, though pin-out and port selection will need to match the respective part. 02; For more details please follow testing README. You must do this every time before running circuitpython code, you can set it permanently in windows if you like, for now just type into the same cmd window you're using with Python. " GitHub is where people build software. 0 Hi-Speed (480Mb/s) to UART/FIFO IC. Note that software code is provided as an illustration only and not supported by FTDI. USB High Speed Power Delivery Series are now available here. Python examples using the FTDI FT2232H Series USB Interface IC - daskals/FT2232H-FTDI-Python-Examples Search code, repositories, users, issues, pull requests PyFtdi aims at providing a user-space driver for popular FTDI devices, implemented in pure Python language. And then you can just wire the FT232H and the STEMMA QT breakout directly together. Class/Type: LibMpsse_AccessToCppDll. Download and install the latest version of the . As an example in this project, we'll wire up an RGB LED and control it using Meadow. USB to I2C in C# This is project is a free download containing source and executable to support AN_411 FTx232H MPSSE I2C Master Example in C Sharp . Board SCL to MCP23017 SCL. . It has a Multi-Protocol Synchronous Serial Engine (MPSSE). You can try to use the GetPinNumberFromString function from Ft232HDevice for example. Click the Initialise button and number of FTDI devices found will be shown. Feb 19, 2014 · Basically, I am using the FT2232H IC to transfer a large amount of data from an FPGA over USB. This guide was first published on Sep 29, 2019. import Adafruit_GPIO. Jun 25, 2022 · Create a file and save it as FT232H-example. Is Pin Mode Supported (Int32, Pin Mode) Checks if a pin supports a specific mode. For example, the devices are opened by a particular description which can be changed. One advantage of using the Python ftd2xx library is that the function arguments are as documented in the FTDI ‘D2XX Programmers Guide’: OP = 0x01 # Bit mask for output D0 d. py is a wrapper around HDL simulators and test_*. Connect the SCL (blue wire) pin to the I2C clock SCL pin on your Arduino. Here's an example of wiring a MCP23017 to a Feather M0 board: Remember you need to explicitly add pull-up resistors to the I2C SCL and SDA connections as shown above! Board 3. I managed to read out the ID and then I also found out that the ICM-20602 has a different device-ID ( 0x12) as specified (0xAF) in the datasheet. 9" long and fitted with JST SH female 4-pin connectors on both ends. Here we set things up, control some LEDs using Pyth FT232H, and FT2232H. That does exist for the 3 chipsets. Operating at USB Hi-Speed 480Mbps rate, this fast single channel bridge chip features either a flexible serial interface or parallel FIFO interface, with data transfer speeds up to 40Mbytes/s. FT232H D7 to FT232H GND. (※厳密には12番はアナログ入力のグランドですが、ここではアナログ信号の電源もFT232Hからとってる前提。. This mode is useful as it provides up to 4 additional I/O lines in addition to the UART interface. I2c port should handle all I/O requests for its associated HW slave. Foundation. self. FT232H. use_FT232H() # Create an FT232H device instance. com: 10. Meadow. The first “board” enables the code to talk to the FT232H, the second “digitalio” is how we Several options require running the other options first. To get more detailed assistance you should provide the exact OS you are using. Code Jan 25, 2021 · The FTD2XX. Connect the parts as follows: FT232H C0 to the LED anode (longer leg) LED cathode (shorter leg) to one leg of the resistor. Add GPIO to any PC or laptop running Windows, Linux or macOS using an Adafruit FT232H USB breakout board. You will need the FT232H itself and a TFT display such as the 2. Oct 24, 2014 · FTDI SPI library access. 8, Modelsim 10. SPI normally has 4 lines; clock, data out, data in, and chip-select. This is similar to the FT2232D, Hi-speed series & FT232R/FT245R asynchronous bit-bang mode. とにかく7~14番はすべて繋いでしまえ!. The FT232H is a single channel USB 2. I am using FT232H as a USB to serial [ SCLK, SDI, SDO] converter. A sample demonstrating the use of the C# wrapper with the D2xx driver, for the FT232H, FT2232H and FT4232H devices to create an I2C master through the MPSSE mode as described in AN_411 is provided for users to experiment with, and extend into their own applications. 2 Enhancement The code examples provided are examples only and can be enhanced by users to meet specific needs. Jun 3, 2024 · To make the device's example code work with the FT232H you'll need to make a few small changes. Open a console window and enter the following command to install a list of Meadow project templates: Nov 21, 2014 · Follow this guide to learn how to connect SPI / I2C devices and update their code to work the FT232H breakout! Before you get started you'll want to make sure you're familiar with the FT232H guide and have followed its steps to install the FT232H driver software. Jul 9, 2020 · FT232H Setup. The UM232H is a USB-to-serial/FIFO development module in the FTDI product range which utilizes the FT232H USB Hi-Speed (480Mb/s) single-port bridge chip to handle the USB signaling and protocols. I chose the IC because I've had some experience with FTDI chips before using their VCP (virtual com port) driver and because of the USB2 speeds available. LibMpsse_AccessToCppDll extracted from For example, if an FT2232D (1 MPSSE port), a FT232H (1 MPSSE port), a FT2232H (2 MPSSE port) and a FT4232H (2 MPSSE ports) are connected to a PC, then a call to I2C_GetNumChannels would return 6 in numChannels. In the FT232H, the four lines associated with this mode are ACBUS9, 8, 6 and 5. The board uses a micro USB connector so you can't use the mini to standard cable that comes with the BBB. The FT232H breakout is like adding a little swiss army knife for serial protocols to your computer! The FT232H can be in one of two modes: UART mode, or "MPSSE" mode, which supports I2C, SPI, etc. ft232h = FT232H. Figure 6. 6d; Ubuntu 20. You should see a green LED next to the 5V pin on the breakout light up. The support for the FT232H in Blinka utilizes the pyftdi library by eblot. The LibMPSSE-SPI library has been created to to aid the implementation of SPI designs using FTDI devices which incorporate the FTDI MPSSE (FT4232H, FT2232H, FT2232D and FT232H) by taking care of all the required MPSSE commands. GitHub Gist: instantly share code, notes, and snippets. vi” to configure the FTDI MPSSE for SPI I2C or JTAG protocols. After some researching I found that the real timing for FT232H is different from the timing in its datasheet. If you are using a 3. FTDI have I2C Master examples for the FT232H device in C++ (AN_255) and Visual Basic NET (AN_355). Search code, repositories, users, issues, pull requests I found some open source FT232H sync mode IPs (from opencore, blogs, etc. Step 2 - Install Visual Studio Code. Sets, reads, and reacts to state changes in the General Purpose Input/Output (GPIO) pins on a Windows IoT ICs with External EEPROM: FT232H, FT2232H and FT4232H 1. The driver attempts to open the pin without changing its mode or value. go at master · ardnew/ft232h Jun 3, 2024 · $ export BLINKA_FT232H=1 $ python3 tft_sidekick_basic. Dec 2, 2018 · The FTDI device powers up in ‘reset mode’ and must be set to bitbang mode using the setBitmode function. FT232H (single port, clock up to 30 MHz) FT2232H (dual port, clock up to 30 MHz) FT4232H (quad port, clock up to 30 MHz) FT4232HA (quad port, clock up to 30 MHz) Features PyFtdi currently supports the following features: UART/Serial USB converter, up to 12Mbps (depending on the FTDI device capability) 6 3. In Stock. After that, run the code: python3 adafruit_blinka_pyportal_quote. Documentation and software for the FTDI FT232H chip and the UM232H-B development module. This in turn relies on a few other things, like libusb. See the OS specific sections for what we went through to get things working for each. ・参照電圧V_REFは電源と同じ、. This flexibility allows MPSSE to be used in different applications including different types of USB to serial conversion and one of famous examples is using OpenOCD, the JTAG/SWD debugger with MPSSE chips. Make sure you've set the BLINKA_FT232H environment variable. _ft232h = ft232h. The top plot is two lines of random numbers. Original version: More Info. # share the I2C bus. Introduction. 04, Python 3. Here's the complete code: Jul 27, 2023 · You can even connect physical peripherals and/or sensors using an IO Expander like Adafruit's FT232H. Sep 29, 2019 · Run Example. CreateI2c Bus Core (Int32, Int32 []) Creates I2C bus related to this device. Adafruit cables. Select the FT201X module from the ‘Select Device’ drop-down and click Open. NET 2013 project. Adafruit FT232H Breakout FT232H - Hi-Speed Single Channel USB UART/FIFO IC. Show us the code and the compiler errors if any. Open the FT232H to FT201X I2C Example project in Visual Studio 2008 or later. The chip is the FT232H and a very nice board is available from Adafruit for $14. DLL - they generate the appropriate MPSSE command sequences from the SPI/I2C parameters, which are then sent to the engine. The bottom line is a sine curve. FT232R, FT232H and FT230X/FT231X support an additional port denoted CBUS: FT232R provides an additional 5-bit wide port, where only 4 LSBs can be used as programmable GPIOs: CBUS0 to CBUS3 , FT232H provices an additional 10-bit wide port, where only 4 pins can be used as programmable GPIOs: CBUS5 , CBUS6 , CBUS8 , CBUS9 Nov 12, 2014 · Dimensions in inches. Click Next. Unfortunately, it needs to use the D2XX driver, which doesn't allow it to show up as a virtual Jul 27, 2023 · You can even connect physical peripherals and/or sensors using an IO Expander like Adafruit's FT232H. set BLINKA_FT232H=1. Basic usage of FTDI chips, such as FT232H and FT2232H, in SPI mode. # Enable clock with three phases for I2C. The FT_Prog utility should be used to Go module for FT232H USB to GPIO/SPI/I²C/JTAG/UART (MPSSE) protocol converter - ft232h/example_test. 5-7: Variables for the scanf and switch-statement deriving the menu. ka sb qe xj ff sr fk fa na hv