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Using Hyperterminal with ADR Interfaces

Hyperterminal is a terminal emulation program included with Windows 95. It can be used to verify hardware connection of an  ADR device and familiarize programmers with the    ASCII commands used with the interfaces. In this example an ADR112 is connected to com2.

To use Hyperterminal, ensure the ADR device is connected to an available serial port and properly powered. Select the Hyperterminal Folder under Programs, Accesories using the side bar menu in Windows 95. Double-click the Hyperterminal icon. Hyperterminal will open and display the following window;

conn.gif (5385 bytes)

Enter ADR112 ( or whatever you like ) as a name for the connection.  You will then be prompted to identify what modem or port to use for the connection.

dirto.gif (3846 bytes)

Select Direct to Com 2 ( the port the ADR interface is connected )    and click OK. You will now be prompted to enter the properties of your port.

NOTE:  If an error is returned such as Could not open port!,  the serial port you selected is not available or not configured properly. Use the Control Panel to free up or configure your serial ports.

prop.gif (5252 bytes)

Set the baud rate at 9600, 8 data bits, No parity, 1 stop bit and hardware handshaking. Click OK to return to the Hyperterminal main screen. Before communicating with the ADR interface,  Select File, Properties, and Click on the ASCII Setup.. button. Ensure only the following boxes are ticked;

aset.gif (4077 bytes)

These settings allow locally typed commands to be viewed in the connection window along with data returned from the ADR interface.

You are now ready to communicate with the ADR interface. In this example the RD0 command is sent to retrieve the 12-bit analog value of AN0 on the ADR112 interface.

RDO.gif (4466 bytes)

After the <CR> button is pressed data is displayed in the connection window.

3977.gif (4472 bytes)

This data indicates the port is at 4.856V   ( ( 3977/4095) * 5.00V )

Commands  entered in the connection window are sent to the ADR interface when <CR>  is pressed, and data sent from the ADR interface is displayed in the connection window.  Note that some commands are non-responsive in that they do not cause a value to be returned from the ADR interface. An example is the CPAxxxxxxxx command. This command configures the individual I/O lines as input or output but no information is returned to the host computer.

Once the connection is verified, interface circuitry can be manually tested using the commands in the appropriate user manual. For example,  SETPA0 could be used to turn on PA0 and verify the circuitry to light an LED connected that digital I/O line, or the RD1 command could be used to read the status of analog input port AN1.

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