Real Time Devices DM6420 Digital Input - DM6420 Digital Input block

Library

xPC Target Library for Real Time Devices

Note

The DAS1601/16 has an 8255 chip with 3 ports (A,B,C). Each port has a maximum of 8 digital I/O lines that can be configured as inputs or outputs.

Use a separate driver block for each port. By selecting the digital input driver block, the port is configured as input.

Scaling Input to Output

Hardware Input	Block Output Data Type	Scaling
TTL	Double	TTL low = 0.0 TTL high = 1.0

Block Parameters

Channel vector

Enter numbers between 1 and 8 to select the digital input lines used with this port. This driver allows the selection of individual digital input lines in any order. The number of elements defines the number of digital lines used.

For example, to use all of the digital inputs for one port, enter

[1,2,3,4,5,6,7,8]

Number the lines beginning with 1 even if the board manufacturer starts numbering the lines with 0.

Port

From the list choose either A, B, or C. The port name defines which port is used for this driver block. Each port has a maximum of 8 digital lines that can be configured as inputs. One block is required for each port used.

Sample time

Enter a base sample time or a multiple of the base sample time.

Base address

Enter the base address of the board. This entry must corresponds to the DIP-switch settings on the board. For example, if the base address is 300 (hexadecimal), enter

0x300

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