Diamond Prometheus/Athena/Athena II Digital Output

Prometheus/Athena Digital Output block


Simulink® Real-Time™ Library for Diamond


Prometheus and Athena boards have three I/O ports, each containing eight digital I/O lines. You can independently configure these ports for either input or output. Use a separate driver block for each port. By selecting the digital output driver block for a given port, that port is configured for output.

Scaling Input to Output

I/O Module Input

Block Output Data Type




TTL low = 0.0

TTL high = 1.0

Block Parameters

Channel Vector

Enter a vector of numbers between 1 and 8 to select the digital output lines used from this port. This driver allows the selection of individual digital output lines in arbitrary order. The number of elements defines the number of digital lines used. For example, to use all of the digital outputs for the current port, enter


Number the lines starting with 1 even if this board manufacturer starts numbering them with 0.


From the list, choose A, B, or C to choose one of the three I/O ports.

Reset vector

The reset vector controls the behavior of the channel at model termination. Enter a scalar or a vector that is the same length as the channel vector. If you specify a scalar value, that setting is replicated over the channel vector. If you specify a value of 1, the corresponding channel is reset to the value specified in the initial value vector. If you specify a value of 0, the channel remains at the last value attained while the model was running.

Initial value vector

The initial value vector contains the initial voltage values for the output channels. Enter a scalar or a vector that is the same length as the channel vector. If you specify a scalar value, that value is replicated as the initial value over the channel vector. The channels are set to the initial values between the time the model is downloaded and the time it is started.

Sample time

Enter the base sample time or a multiple of the base sample time (-1 means sample time is inherited).

Base address

Enter the base address of the board. This entry must correspond to the DIP switch setting on the board. For example, if the DIP switch setting is 300 (hexadecimal), enter 0x300.

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