This version (12 Sep 2022 16:28) was approved by Angu Sewa.The Previously approved version (21 Mar 2021 08:47) is available.
Table of Contents
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Rotary Encoder
Description
The Rotary Encoder block processes the inputs from a rotary encoder and outputs an “up” and a “down” signal. The algorithm also incorporates a software “de-bouncer” for each of the inputs.
Usage
1) Drag the block into the schematic.
2) Connect the inputs to two GPIOs. These would correspond to the 2 out-of-phase output pins of a rotary encoder. In hardware configuration, set the GPIOs to “no debounce.”
The value in the field sets the time constant (in samples) for the debouncer. Adjust this value by trial and error using the rotary encoder in your end system.
Targets Supported
| Name | ADSP-214xx | ADSP-215xx/ADSP-SC5xx | ADAU145x/146x |
|---|---|---|---|
| —————————————- | —————————————— | ————————————————-- | ——————————————- |
| Rotary Encoder | Not supported | Not supported | Sample |
Pins
Input
| Name | Type | Description |
|---|---|---|
| ————— | ——————- | ———————————————————— |
| Input0 | Control | GPIO rotary up input control |
| Input1 | Control | GPIO rotary down input control |
Output
| Name | Type | Description |
|---|---|---|
| ————— | ——————- | —————————————————————————-- |
| Output0 | Control | GPIO rotary up output control |
| Output1 | Control | GPIO rotary down output control |
Configurable Parameters
| GUI Parameter Name | Default Value | Range | Function Description |
|---|---|---|---|
| —————————————- | ———————- | ————————————- | —————————————- |
| Gain | 20 | 3 to 100 | Time constant for debounce |
| IsLin | true | true/false | Setting this value to true indicates the gain is a decimal value, else the value is entered in dB |
DSP Parameters
| Parameter Name | Description | ADAU145x/ADAU146x |
|---|---|---|
| ————————-- | ————————————————————-- | ——————————— |
| countmax | Time constant for debounce | Integer32 |
DSP Parameter Computation
if IsLin ==true
max= Gain
else
max = 10^ (Gain/20)
resources/tools-software/sigmastudiov2/modules/gpioconditioning/rotaryencoder.txt · Last modified: 12 May 2021 14:26 by Prasad Kamath