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PNI CommBoard User Manual Page 5

4 Set-Up

4.1 Communication Setup

The CommBoard‟s physical interface is USB, but it runs a virtual UART over the USB line.

As such, it is necessary to implement a virtual communication port (VCP) on the user‟s

computer. The CommBoard uses FTDI‟s FT232R USB-to-RS232 IC, and the driver for this

IC should be installed on your computer. This driver can be found on FTDI‟s website at:

http://www.ftdichip.com/Drivers/VCP.htm.

After installing the VCP driver and plugging in your PNI device, connect the CommBoard to

your computer using a USB-to-mini-USB cable. The USB line provides power to the

CommBoard and the device-under-test. The UART should be configured as shown below.

Table 4-1: UART Configuration

Parameter

Value

Baud Rate

115200

Number of Data Bits

Start Bits

Stop Bits

Parity

none

Figure 4-1 shows how a computer connects to a PNI device mounted on the CommBoard.

On the computer side, the user will send commands using an ASCII terminal program such

as HyperTerminal or Realterm. Alternatively, Matlab or a similar application that outputs

ASCII can be used. These all will use a Virtual Comm Port to place their UART commands

on the USB line of the computer. On the PNI CommBoard, the UART commands either are

translated into SPI commands or I

C commands using the CommBoard‟s CPU, or sent

directly to the PNI device. Whether the UART commands are translated into SPI or I

C, or

fed directly into the PNI device, is established by the jumpers, discussed in Section 4.1.

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ChrisPlafe 26 Apr 2024 | 08:28:15

Hello, im noob :)

Pni CommBoard Manual de usuario Pagina 7