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This version (10 May 2021 16:31) was approved by Prasad Kamath.The Previously approved version (21 Mar 2021 08:51) is available.
This version (10 May 2021 16:31) was approved by Prasad Kamath.The Previously approved version (21 Mar 2021 08:51) is available.This is an old revision of the document!
Table of Contents
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Up Down Control LUT
Description
This block takes in two inputs, one up and one down, and uses them to generate an index for a lookup table. The starting index is pre-loaded into an interface register and the up/down inputs increment or decrement the value.
Usage
- Drag the block into your schematic.
- Connect the red control inputs to GPIOs that have been conditioned by Push and Hold, or to the outputs of the Rotary Encoder.
- Connect the yellow input pin to an Interface Read block.
- Connect the yellow output to an Interface Write block, with the same register selected for both the interface read and write blocks.
- The output will be the value in the table corresponding to the index.
Targets Supported
| Name | ADSP-214xx | ADSP-215xx/ADSP-SC5xx | ADAU145x/1456x |
|---|---|---|---|
| —————————————- | —————————————— | ————————————————-- | ——————————————- |
| Up Down Control LUT | Not supported | Not supported | Sample |
Pins
Input
| Name | Type | Description |
|---|---|---|
| ———————————- | ——————- | ———————————————————— |
| Input0 | Control | increment input (up) |
| Input1 | Control | decrement input (down) |
| Input2 | Logic | Connected to a software interface register - reads the last stored value at startup |
Output
| Name | Type | Description |
|---|---|---|
| ———————————-- | ——————- | —————————————————————————————- |
| Output0 | Control | Output signal |
| Output1 | Logic | Connected to a software interface register - writes the last output value |
Configurable Parameters
| GUI Parameter Name | Default Value | Range | Function Description |
|---|---|---|---|
| —————————————- | ———————- | ———————- | ——————————————————————————————————— |
| ByPassEnable | disable | enable/disable | bypasses the LUT value looked up |
| NoOfTableValues | 33 pts | [2, 800] | Sets the table size: the number of points used in the volume table curve. |
| TableValues | 1 | [-16, 15.99] | The table points are the actual gain values for the volume curve in linear representation. Although the range supports the full values of [-16, 15.99] the table values should generally be between [0, 1] for proper gain adjustments. The user has full control in this table to add a linear, logarithmic of custom gain volume curve |
DSP Parameters
| Parameter Name | Description | ADAU145x/ADAU146x |
|---|---|---|
| ————————-- | ———————————————————————————————————————————- | ——————————— |
| maxindex | maxnumber of table points | Fixed Point 32.0 |
| table_p0 | All the points in the table are written to the DSP in their linear gain format | Fixed Point 8.24 |
DSP Parameter Computation
Not applicable
/srv/wiki.analog.com/data/pages/resources/tools-software/sigmastudiov2/modules/gpioconditioning/updowncontrollut.txt · Last modified: 12 May 2021 14:28 by Prasad Kamath