Operator Library: Signal
The operator downscales the input signal to the specified frequency, i.e. only every Nth pulse will be forwarded to the output. Parameter Downscale specifies the downscale factor. Parameter SelectedPulse defines which pulse of a downscale sequence is used and forwarded to the output. Parameter value changes are applied only when the operator starts a new sequence. In the following waveform, the operator behavior is visualized.
The operator can be reseted using input link Reset. While the reset input is high, no pulses are processed. Any processing is aborted. The operator restarts its operation when the reset input is low. The following waveform illustrates the operator's behavior.
This operator is excluded from the VisualApplets functional simulation.
| Property | Value |
|---|---|
| Operator Type | O |
| Input Links | I, signal data input Reset, signal data input |
| Output Link | O, signal data output |
| Link Parameter | Input Link I | Input Link Reset | Output Link O |
|---|---|---|---|
| Bit Width | 1 | 1 | as I |
| Arithmetic | unsigned | unsigned | as I |
| Parallelism | 1 | 1 | as I |
| Kernel Columns | 1 | 1 | as I |
| Kernel Rows | 1 | 1 | as I |
| Img Protocol | VALT_SIGNAL | VALT_SIGNAL | as I |
| Color Format | VAF_GRAY | VAF_GRAY | as I |
| Color Flavor | FL_NONE | FL_NONE | as I |
| Max. Img Width | any | any | as I |
| Max. Img Height | any | any | as I |
| MaxScaleBits | |
|---|---|
| Type | static parameter |
| Default | 8 |
| Range | [1, 32] |
|
Defines the maximum range of parameter Downscale. This parameter is enabled only if Downscale is set to dynamic. |
|
| Downscale | |
|---|---|
| Type | dynamic/static read/write parameter |
| Default | 1 |
| Range | [1, 2^MaxScaleBits-1] if dynamic, [1, 2^64-1] else |
|
The actual downscale factor is defined with using this parameter. A downscale factor of one will forward any input pulse do the output. The value has to be >= parameter SelectedPulse. |
|
| SelectedPulse | |
|---|---|
| Type | dynamic/static read/write parameter |
| Default | 1 |
| Range | [1, 2^MaxScaleBits-1] if dynamic, [1, 2^64-1] else |
|
This parameter selects the pulse of a sequence to be forward to the output. The value has to be <= parameter Downscale. |
|
The use of operator Downscale is shown in the following examples:
-
'Rebuild of Operator TrgPortLine with VisualApplets Signal Processing Operators'
A VisualApplets design example where all functions of operator TrgPortLine are rebuild using other signal processing operators. Allows custom trigger modules.
-
'Functional Example for Specific Operators of Library Signal, Logic, Filter and Parameters'
Examples - Demonstration of how to use the operator
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